Answer:
Gold
Silver
Mixture
Explanation:
Density
The density of an object of mass m and volume V is given by:
\(\displaystyle d=\frac{m}{V}\)
We are given the following densities:
Gold: 19.3 gr/cm3
Silver: 10.5 gr/cm3
With the data provided in the table, we can confirm which of the three columns corresponds to gold, silver, or a mix of both.
Calculating the first density: m1=1,930 gr, V1=100 cm3
\(\displaystyle d1=\frac{m1}{V1}\)
\(\displaystyle d1=\frac{1,930}{100}\)
\(d1=19.3\ gr/cm^3\)
This crown is made of gold
Calculating the second density: m2=1,930 gr, V2=184 cm3
\(\displaystyle d2=\frac{m2}{V2}\)
\(\displaystyle d2=\frac{1,930}{184}\)
\(d2\approx 10.5\ gr/cm3\)
This crown is made of silver
Calculating the last density: m3=1,930 gr, V3=150 cm3
\(\displaystyle d3=\frac{m3}{V3}\)
\(\displaystyle d3=\frac{1,930}{150}\)
\(d3\approx 12.9 gr/cm^3\)
Since the value of the density is between gold and silver, this crown is a mixture.
Consider the system shown in the figure. The rope and pulley have negligible mass, and the pulley is frictionless. The coefficient of kinetic friction between the 8.00-kg block and the tabletop is m_k=.25 . The blocks are released from rest.Use energy methods to calculate the speed of the 6.00-kg block after it has descended 1.50 m. How do i calculate work on the 8kg block.
Plugging in the given values and solving for the final velocity of the 6kg block will give you the speed of the 6.00-kg block after it has descended 1.50 m. In this case, the normal force is the weight of the 8kg block, and the displacement is the distance that the 8kg block moves.
Energy Method Block SpeedTo calculate the speed of the 6.00-kg block after it has descended 1.50 m, you can use the conservation of mechanical energy. The initial mechanical energy of the system is the potential energy of the 6.00-kg block (mgh) and the potential energy of the 8.00-kg block (mgh). As the blocks move, some of this energy is converted into kinetic energy, and some is lost to friction. The equation for the conservation of mechanical energy is:
E_initial = E_final + W_friction
Where E_initial is the initial mechanical energy of the system, E_final is the final mechanical energy of the system, and W_friction is the work done by friction.
The final mechanical energy of the system is the kinetic energy of the 6.00-kg block (1/2 mv²) and the potential energy of the 8.00-kg block (mgh).
To calculate the work done by friction, you can use the equation:
W_friction = force x distance x cos(theta)
Where force is the force of friction, distance is the distance over which the force of friction acts, and theta is the angle between the force of friction and the displacement. The force of friction is the coefficient of kinetic friction times the normal force.
In this case, the normal force is the weight of the 8kg block, and the displacement is the distance that the 8kg block moves.
W_friction = m_kF_nd
Where m_k = 0.25 is the coefficient of kinetic friction, F_n = 8*9.8 N is the normal force, and d = 1.5m is the distance that the 8kg block moves.
Plugging in the given values and solving for the final velocity of the 6kg block will give you the speed of the 6.00-kg block after it has descended 1.50 m.
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How deep is the floor of the ocean if a sonar sound takes 7 seconds to return back to the ship?
Ava runs track and field and is a long-distance runner. She has a big race coming up and needs to eat food that will provide her with enough energy to last throughout the race. What food would be best for her to prepare for her race?
A. salad
B. milk
C. apple
D. pasta
Answer:
A. salad
Explanation:
Problem 50 (8th edition) statement: helium is to be compressed from 105 kpa and 295 k to 700 kpa and 460 k. a heat loss of 15 kj/kg occurs during the compression process. neglecting kinetic energy changes, determine the power input required for a mass flow rate of 60 kg/min.
The input power required for a mass flow rate of 60 kg/min is calculated to be 871.35 kW.
Given that,
Initial temperature T₁ = 295 K
Final temperature T₂ = 460 K
Initial pressure P₁ = 105 k pa
Final pressure P₂ = 700 k pa
The specific heat loss from the compressor Q = 15 kJ/kg
The mass flow rate m = 60 kg/min
Refer to the properties of element to determine the specific heat of helium.
Cp = 5.19 kJ/kg.K
Apply the energy balance equation for calculating the input power.
W - m Q = m h₁ - m h₂
W - m Q = m (h₁ - h₂)
W - m Q = m Cp (T₁ - T₂)
where,
W is the input power
h₁ and h₂ are the initial and final enthalpy
Placing the values in the above expression, we have,
W - 60 kg/min (1 min/60 sec) × (-15 kJ/kg) = 60 kg/min (1 min/60 sec) × 5.19 kJ/kg.K (295 K - 460 K)
W = -871.35 kJ.s (1kW/1kJ) = -871.35 kW
Thus, the input power = 871.35 kW.
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IDK MORE POINTS BUT SAY SOMTHING FUNNY
Not the place for this but yesterday I ate a clock, it was very time consuming.
What is brown and sticky
A STICK GET YOUR MIND OUT OF THE GUTTER
Which of the following is a vector quantity?
O speed
O time
O force
O displacement
O temperature
O momentum
O velocity
O acceleration
According to the given information temperature and velocity of the following is a vector quantity
Is temperature a vector quantity?A vector quantity is one that just has magnitude, whereas a vector quantity has both orientation and magnitude. Given that it is direction-independent at a given position, heat is a scalar number.
Is the force of gravity a vector?Vectors include gravity and displacement. They possess both a value and a direction. The fact that gravity and displacement are pointing in the same direction in this instance allows us to derive a scalar energy from them (in this example, their direction are down and down, respectively).
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What is the applied voltage of a circuit that draws 2 amps through 2 Ohms of Resistance?
Answer:
255 volts
Explanation:
hope this helps
pls mark as brainliest
FAILURE OF THE PRODUCT Instructions 1. Select THREE from everyday below items from the list and discuss the way this item can potentially fail (list minimum THREE failures). Justify your answer by considering Load Strength graph and what can be done to prevent those failures. -Ball Pen -Room Key - Blender
The three product which can be potentially fail considering Load Strength graph and precautionary measure to prevent failure are as below;
Ball Pen:
1. Ink Leakage: One potential failure of a ball pen is ink leakage. This can occur due to poor sealing between the ink reservoir and the ballpoint mechanism. Ink leakage can result in messy hands, stained documents, and reduced functionality of the pen. To prevent this failure, manufacturers can improve the quality control process to ensure proper sealing and use high-quality materials for the pen's components.
2. Ballpoint Jamming: Another failure is ballpoint jamming, where the ball gets stuck and prevents smooth writing. This can be caused by a buildup of dried ink or debris inside the pen's mechanism. To prevent ballpoint jamming, regular cleaning and maintenance of the pen can be recommended. Additionally, manufacturers can design the pen with features that facilitate easy cleaning or provide instructions on how to clear any blockages.
3. Weak Barrel Construction: The barrel of the pen may also be prone to failure if it is weak or brittle. Excessive pressure or rough handling can lead to cracks or breakage, rendering the pen unusable. To prevent this, manufacturers can use durable materials for the pen barrel, such as sturdy plastics or reinforced metal, and perform quality checks to ensure structural integrity.
Room Key:
1. Keycard Malfunction: A potential failure of a room key is a malfunction in its electronic components. This can result in the keycard being unreadable by the door lock system, preventing access to the room. To prevent this failure, regular maintenance and replacement of keycard readers can be implemented. Additionally, guests should be advised to keep their keycards away from magnets and electronic devices that can interfere with the card's functionality.
2. Magnetic Strip Damage: Another failure can occur if the magnetic strip on the keycard gets damaged or demagnetized. This can happen due to exposure to magnetic fields or physical damage. To prevent this failure, keycards can be made more durable with protective coatings or alternative technologies such as RFID. Guests should also be educated on proper handling and storage of keycards to avoid damage.
3. Battery Drain: Some room keys use batteries to power their electronic components. A failure can occur if the battery drains, leading to an inactive keycard. To prevent this, low-power consumption designs can be implemented, and regular battery checks or replacements can be carried out by hotel staff. Guests should be informed about the importance of returning the keycard to the front desk for recycling or proper disposal to ensure the battery is replaced as needed.
Blender:
1. Motor Burnout: One potential failure of a blender is motor burnout due to prolonged use or overloading. Continuous operation at high speeds or attempting to blend hard or frozen ingredients beyond the blender's capacity can cause the motor to overheat and fail. To prevent motor burnout, manufacturers can provide clear guidelines on the maximum load capacity and recommended usage durations. Automatic thermal protection mechanisms can also be incorporated to shut off the blender if it detects excessive heat.
2. Blade Jamming: Another failure can occur if food particles or ingredients get jammed between the blender's blades, preventing them from spinning freely. This can happen if the blender is not properly cleaned or if ingredients are not adequately prepared before blending. To prevent blade jamming, users should be advised to clean the blender thoroughly after each use and ensure that ingredients are cut into manageable sizes. Manufacturers can also design blades with accessible mechanisms for easy cleaning or provide cleaning tools.
3. Leakage: A failure in a blender can also manifest as leakage. This can happen if the blender jar or its sealing components are damaged or improperly assembled. Liquid or food can leak out during blending, resulting in a messy and potentially unsafe situation. To prevent leakage, manufacturers should ensure proper sealing mechanisms and use high-quality materials for the blender jar and lid. Regular inspection of the sealing components can be advised,
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what is the work done when a 400.n force is use to lift a 400.n object 3.5 meters strait up
Answer:
i think it's 1400
Explanation:
w = Force x displacement
w = 400 x 3.5
20 points!
A student wants to measure the diameter of a ping pong ball, a golf ball, and a baseball.
Which SI unit should the student use?
centimeters
moles
kilometers
milligrams
Answer:
Centimeters.
Explanation:
There are only 2 viable answers here. This is due to the fact that moles are used not to measure diameters but instead the number of atoms.
Similarly, milligrams are not used to measure diameters but instead small volumes.
This leaves us with kilometers and centimeters, and since all 3 objects are more easily representable in centimeters than kilometers, the answer must be centimeters. One example would be the diameter of a ping pong ball, which is approximately 4cm, or in other words, 0.00004km, with 4cm being much more easy to represent as it overall involves less digits.
A mechanic oils his tools between uses. Explain how this relates to friction andefficiency.
Answer:
it reduces friction
Explanation:
if you put oil or any liquid between the tool it will shift and change the shape as much as it needs to. It will smooth the bumps between the tools gears as they squeeze together making the friction reduce. It will slide and that reduces the friction.
i hope this helps im lowkey just guessing tho so sorry if it doesnt. lmk tho
A lamp uses a standard 9 V battery, How much resistance is in the circuit is in the current of 1.05 A?
Answer:
R= v/I
R= 9/1.05=8.5714 ohms
Determine time taken for temperature to fall from 65 to 55
The time taken for temperature to fall from 45°C to 35°C is 6.21 minutes when a liquid cools from 65°C to 55°C in 5 mins.
We can utilize Newton's Law of Cooling to tackle this issue. It expresses that the pace of progress of temperature of an article is corresponding to the distinction in temperature between the item and its environmental elements.
Utilizing this regulation, we can compose:
(dT/dt) = - k(T - Ts)
where dT/dt is the pace of progress of temperature, k is the cooling steady, T is the temperature of the fluid, and Ts is the temperature of the environmental elements.
To begin with, how about we track down the cooling steady. From the given data, we know that the fluid cools from 65°C to 55°C in 5 mins. Subsequently, we can compose:
-10 = - k(65 - 35)
k = 0.5
Presently, we can utilize this worth of k to make the opportunity taken for temperature to decrease from 45°C to 35°C. We want to tackle:
(dT/dt) = - 0.5(T - 35)
with introductory condition T(0) = 45.
Isolating factors and coordinating the two sides, we get:
ln|T - 35| = - 0.5t + C
Utilizing the underlying condition T(0) = 45, we get:
ln|10| = C
C = 2.303
Subbing this worth of C, we get:
ln|T - 35| = - 0.5t + 2.303
Taking dramatic on the two sides, we get:
|T - 35| = e^(- 0.5t+2.303)
Settling for T = 35°C, we get:
t = 6.21 minutes.
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The complete question is:
A liquid cools from 65°C to 55°C in 5 mins. If the surrounding temperature is 35℃, calculate the time taken for temperature to fall from 45°C to 35°C.
Give a general description of how winds form
Answer:
Wind comes from pressure and temperature differences.
Explanation:
Have you ever opened a window on a hot day to let a breeze in? What is happening is a rush of air to balance out temperatures. This goal for uniformity is why ice melts in a glass of warm coffee and air rushes out of a balloon.
Answer:
Wind forms when the sun heats one part of the atmosphere differently than another part. This causes expansion of warmer air, making less pressure where it is warm than where it is cooler. Air always moves from high pressure to lower pressure, and this movement of air is wind.
Explanation:
is glass composed of multiple layers of polycarbonate plastic and/or glass bonded together under intense heat and pressure and coated with a pvb or polycarbonate film
Glass is not composed of multiple layers of polycarbonate plastic and/or glass bonded together under intense heat and pressure. Glass is a solid material made primarily from silica, which is heated and melted to form a transparent and rigid substance.
Glass is an inorganic and non-crystalline solid material that is commonly used for various applications, such as windows, bottles, and mirrors. It is primarily composed of silica (silicon dioxide) along with small amounts of other materials, such as soda ash and limestone, which are added to modify its properties.
The process of making glass involves heating a mixture of raw materials, including silica, to high temperatures until it melts and becomes a molten liquid. The molten glass is then shaped and cooled rapidly to form a solid material with an amorphous structure. This rapid cooling process is known as quenching.
The resulting glass material is transparent, rigid, and brittle. It does not consist of multiple layers of polycarbonate plastic or glass bonded together under intense heat and pressure, as described in the statement. However, in certain applications, glass may be combined with other materials or coatings, such as polyvinyl butyral (PVB) or polycarbonate films, to enhance its strength, safety, or insulation properties. These additional layers or coatings are often used in safety glass or laminated glass construction, where multiple glass layers are bonded together with an interlayer material for improved durability and impact resistance.
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Why should anybody care about sexual harassment?
Answer:
Explanation:
People should care about sexual harassment for many reasons. such as, sexual harassment is a very serious and touchy topic. Sexual harassment should not be tolerated and can ruin many peoples mental health.
BRAINLIEST!!! how did the intensity of a sound wave change if the distance from the source is decreased by a factor of 2? Right answers only!!!
a. the intensity increases by a factor of 4
b. the intensity increases by a factor of 2
c. the intensity decreases by a factor of 2
d. intensity decreases by a factor of 4
Answer:
D.
Explanation:
The answer should be D. because if it increases by a factor of 2 then it will decrease at a factor of 4.
I hope it helps! Have a great day!
Anygays-
Respond to the following based on your reading.
How does the valence of an element relate to its chemical activity?
Identify the statements below as belonging to one of these laws: law of conservation of matter, law of conversation of energy, or law of definite proportions.
Energy can be neither created nor destroyed by chemical means but can be changed from one form to another.
The composition of a chemical compound never varies.
Matter can be neither created nor destroyed by chemical means but can be changed from one form to another.
How was the Periodic Table of Elements developed and how are the elements arranged on it?
Using the Periodic Table of Elements, fill in the chart below to identify and describe the properties of the noble gases.
Element Name Group Number Period Number Valence Properties/Reactivity Uses
Using the Periodic Table of Elements, fill in the chart below to identify and describe the properties of the halogens.
Element Name Group Number Period Number Valence Properties/Reactivity Uses
Using the Periodic Table of Elements, fill in the chart below to identify and describe the properties of the nonmetals.
Element Name Group Number Period Number Valence Properties/Reactivity Uses
Describe the unique properties of water. Be sure to include an explanation of the filtration systems we use to keep water safe for drinking.
What is the Earth’s atmosphere composed of, and why is it important?
The gases that make up the planet's atmosphere are mixed together.Nitrogen, oxygen, & carbon dioxide are among the atmospheric gases.The water cycle & weather depend on the atmosphere, which also sustains life.
Why is it crucial to us in Class 7?The atmosphere of the earth shields its people by absorbing dangerous sun rays and preserving a constant temperature.It protects Earth from many space hazards and enables life there.As a result, it is crucial for regulating climate and a source of life on planet.
What elements make up the atmosphere on Earth?Approximately 78% of the air of Earth's atmosphere is nitrogen, while 21% is oxygen.In trace proportions, additional gases like carbon dioxide, neon, & hydrogen are also present in air.
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Answer:
1. The number of valence electrons that an atom has dictates its ability to react chemically. The closer an atom is to achieving a full outermost shell, the more likely it will be to borrow electrons. Atoms are paired in a way that allows both to achieve a full stable outermost shell. For example, one atom of silicon has 14 electrons, four of which are valence electrons in the outermost shell. Silicon can lend, share, or gain four electrons to achieve a full outermost shell.
2.
a. Law of conservation of energy
b. Law of definite proportions
c. Law of conservation of matter
3. Mendeleev first published a table of elements arranged according to increasing atomic masses. He noticed that some elements near each other had differing properties, but elements in vertical columns had similar properties. Moseley then rearranged the table according to atomic numbers and this eliminated the discrepancies found in Mendeleev’s attempt. Today’s version of the periodic table displays elements in order based on their atomic number; the atomic number indicates the number of protons within the atoms of a particular element. Rows are called periods and columns are called groups. Elements in the same group have similar properties. Elements are grouped into nine categories: noble gases, halogens, nonmetals, alkali metals, alkaline earth metals, transition metals, other metals, metalloids, and rare earth elements.
( VIEW ATTACHMENT FOR 4, 5, AND 6.)
7. Water is colorless, odorless, and tasteless. It's the chief substance of living material. It has a specific gravity of 1.0 at 4° Celsius. It freezes at 0° Celsius and boils at 100° Celsius. Water is a powerful solvent. Distillation is needed to remove impurities. Purification methods include
Aeration (water is sprayed into the air so that light and oxygen can kill bacteria)
Filtration (water is passed through a filter to remove impurities)
Chlorination (chlorine is added to water to destroy bacteria)
Coagulation (chemicals are added to water to cause organic matter with bacteria to settle out)
8. Air contains nitrogen (78%), oxygen (21%), carbon dioxide (0.04%), and rare gases (less than 1%). It also contains water, dust, bacteria, and other materials.
The atmosphere supports life via two cycles. In the carbon dioxide cycle, carbon dioxide is taken in by plants and used in photosynthesis. From here, oxygen is released to the atmosphere and taken in by animals; it fuels combustion and is needed for fermentation and decay. These processes convert it back to carbon dioxide.
In the nitrogen cycle, nitrogen is fixed by bacteria in the soil into usable nitrogen compounds absorbed by plants. Plants use these to form proteins, which are used as food by animals. Decaying plants and animal wastes return the nitrogen to the soil and ammonia to air. Without atmospheric nitrogen, rust and decay of living material would happen more quickly.
positron emission tomography (pet) studies of patients with schizophrenia have found
Positron emission tomography (PET) studies of patients with schizophrenia have found various patterns of brain activity and neurotransmitter abnormalities associated with the condition. Some key findings from PET studies in schizophrenia include:
Dopamine Dysregulation: PET studies have revealed an imbalance in dopamine neurotransmission in the brains of individuals with schizophrenia. Excessive dopamine activity in certain brain regions, such as the mesolimbic pathway, is associated with positive symptoms of schizophrenia, including hallucinations and delusions.Hypofrontality: PET scans have shown reduced metabolic activity in the frontal cortex of individuals with schizophrenia. This "hypofrontality" may be related to cognitive impairments and negative symptoms experienced by patients, such as decreased motivation and social withdrawal.
Abnormal Glutamate Levels: PET studies have suggested alterations in glutamate neurotransmission in individuals with schizophrenia. Glutamate is an excitatory neurotransmitter involved in various cognitive processes. Disruptions in glutamate signaling may contribute to cognitive deficits observed in schizophrenia.Brain Connectivity: PET imaging has also provided insights into altered functional connectivity in the brains of individuals with schizophrenia. Aberrant patterns of connectivity between different brain regions have been associated with symptoms and cognitive impairments in the disorder.
It is important to note that findings from PET studies in schizophrenia can vary across individuals and may not be consistent across all patients. More research is needed to fully understand the complex neurobiological mechanisms underlying schizophrenia
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What is the velocity of a cyclist with a combined mass of 150 kg as he travels with a one 10,492 J of kinetic energy?
Answer:
11.9m/s
Explanation:
It appears as though your vehicle is about to be hit on the right side (a broadside collision). What should you do to reduce damages from the collision?
Answer:
Turn the vehicle to the left, in order to reduce the momentum on the car during sackcloth
Explanation:
In the case of a collision on the right side, two things can be done to reduce the damage caused.
* Turn the vehicle to the left, in order to reduce the momentum on the car during sackcloth
* Decrease the speed, to have a less change in the amount of movement.
A 1,300kg car moving at 20m/s and a 900kg car moving at 15m/s in precisely opposite directions participate in a head-
on crash. If we consider this event to be a perfectly inelastic collision, what is the speed and direction of the cars after
the impact?
Answer: 5.68 m/s the the right in the direction to the car (because it’s a positive velocity)
Explanation:
The speed and direction of the cars after the impact is 5.68 m/s towards the first car.
Given data:
The mass of car is, m = 1300 kg.
The speed of car is, u = 20 m/s.
The mass of another car is, m' = 900 kg.
The speed of another car is, u' = - 15 m/s. (Negative sign shows that direction of car 2 is opposite to car 1)
As per the conservation of linear momentum, "The total momentum of system before the collision must be equal to total momentum after the collision". And this applicable for the perfectly inelastic collision as well. Then the expression is,
\(mu+ m'u' = (m+m')v\\\\v=\dfrac{mu+m'u'}{m+m'}\)
Solving as,
\(v=\dfrac{(1300 \times 20+(900 \times - 15)}{1300+900}\\\\v = 5.68 \;\rm m/s\)
This will be towards the car 1 ( moving with u = 20 m/s)
Thus, we can conclude that the speed and direction of the cars after
the impact is 5.68 m/s towards the first car.
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Light energy from the Sun reaches an ocean beach, where people are
walking. Which transfer of thermal energy involved in this scenario is an
example of radiation?
O A. From the sand to the ocean waves that strike the beach
O B. From the Sun to the sand
O C. From the sand on the beach to the bottoms of a person's feet
O D. From warm air over the beach to cooler air over the ocean
Answer: B
Thermal energy can be transferred by three methods: conduction, convention, and radiation.
Radiation transfer occurs when there is no movement of matter for the exchange of energy.
hope this helps :)
From the sun to the sand
See sun's light energy is a thermal energy also as sun 's ray produces heatSo when that comes contact with sand energy is transferred3.5
An experiment was pero
of conductor on the current strength. A 200 mm length of nichrome
wire with diameter 0,3 mm is wound into a coil an attached to a
circuit. The potential difference is measured across the coil. The
experiment is repeated for a 200 mm length of copper wire of
diameter 0,3 mm. Temperature was kept constant. The following
results were obtained:
Current through each wire (A)
Potential difference across the
nichrome wire(V)
Potential difference across the copper
wire(V)
0,2 0,4 0,6 0,8 1,0
0,8 1,6 2,4 3,2 4,0
0,4 0,8 1,2 1,6 2,0
what is the independent variable here
The current flowing through each wire is the experiment's independent variable because it is the one that the experimenter is actively manipulating and controlling.
How does the resistance in the circuit change depending on the thickness of a piece of nichrome wire?The resistance is influenced by the wire's thickness, so the thicker the wire, the lower the resistance. Because less water can flow through a narrower pipe in a given length, there is more resistance in a narrower pipe.
Why does a nichrome not heat up in an electric circuit whereas a nichrome wire does?Due to the alloy composition of nichrome wire, its resistance is quite high. Because of this, it generates a lot of heat when current flows through it, making it extremely hot to the touch.
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Frogs have changed their coloring over time to adapt to their environment. This is an example of which of the following?
Adaptation
Artificial selection
Environmental change
Natural selection
Correct option is D. Natural selection.
Frogs have changed their coloring over time to adapt to their environment. This is an example of natural selection.
Natural selection is the process of adaptation in response to environmental change.
The process involves differential survival and reproduction of individuals with genetic traits that are better suited to their environment, and this process can lead to changes in the genetic makeup of a population over time.
As a result, populations of organisms can become better adapted to their environment, which is a critical factor in their survival and continued evolution.
Frogs are known for their remarkable ability to change color to match their surroundings.
This adaptation allows them to blend in with their environment, making them less visible to predators and prey.
The process by which frogs have adapted to their environment is an excellent example of natural selection in action.
Over time, the individuals with genetic traits that provide better camouflage are more likely to survive and reproduce, passing on their traits to their offspring.
As a result, the population of frogs becomes better adapted to their environment, allowing them to thrive in their natural habitats.
The correct Option is D. Natural selection.
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what made the dinosaurs instinct
Answer:
Eruptions/Volcano
Explanation:
poop fell from the sky
You wish to date a hip bone fragment you found at a cave site.
You find a ratio of 1 14C atoms for every 31 14N atoms. How many
half- lives have elapsed?
To determine the number of half-lives that have elapsed, we need to compare the ratio of 14C to 14N atoms found in the hip bone fragment.
The ratio of 1 14C atom for every 31 14N atoms suggests that the hip bone fragment contains a smaller amount of 14C compared to the expected ratio found in a living organism. Since 14C undergoes radioactive decay with a half-life of approximately 5730 years, we can calculate the number of half-lives that have elapsed by observing how many times the ratio needs to double to reach the expected ratio.
In this case, if the expected ratio is 1:1, then the observed ratio of 1:31 would require five doublings to reach 1:1. Therefore, approximately five half-lives have elapsed since the death of the organism from which the hip bone fragment originated.
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on average, how often do impacts large enough to produce mass extinction on the earth occur?
I don't know I can't read that sorry I mean don't understand
1. At a local salon called Curl up and Dye a woman has mysteriously become
ill. Earlier that day she was exposed to a hydrogen peroxide solution
containing 3% hydrogen peroxide. If she received 7mL of solution how
much of the solution was hydrogen peroxide? (2 marks)
Answer:
30mL FAX
Explanation:
I n it in 20 minutes
JL.61 A producer of refrigerator compressors wants to implement
a just-in-time production line to support demand from a neighboring
appliance manufacturer. Demand from the applian
The producer of refrigerator compressors needs to determine the number of kanbans required for implementing a just-in-time production line to meet the demand for 150 compressors per day from a neighboring appliance manufacturer.
To calculate the number of kanbans required, we need to consider the production lead time, safety stock factor, and optimal production quantity. The production lead time is 5 days, which means that it takes 5 days to produce a batch of compressors once the production process starts.
The safety stock factor is 17%, indicating that the producer wants to maintain an additional 17% of the daily demand as safety stock to mitigate any unforeseen fluctuations. The optimal production quantity is 95 units, which is the batch size that minimizes setup costs.
To determine the number of kanbans, we first need to calculate the total demand during the production lead time. Since the demand is 150 compressors per day and the lead time is 5 days, the total demand during the lead time is 150 compressors/day * 5 days = 750 compressors. Adding the safety stock, the total demand becomes 750 compressors + (17% * 150 compressors) = 750 compressors + 25.5 compressors = 775.5 compressors.
Next, we divide the total demand by the optimal production quantity to get the number of kanbans required. The number of kanbans is calculated as 775.5 compressors / 95 compressors per kanban = 8.16 kanbans. Since we cannot have a fraction of a kanban, we round up to the nearest whole number. Therefore, the producer of compressors requires 9 kanbans to meet the demand of 150 compressors per day from the neighboring appliance manufacturer.
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The complete question is:
A producer of refrigerator compressors wants to implement a just-in-time production line to support demand from a neighboring appliance manufacturer. Demand from the appliance manufacturer is for 150 compressors a day. The production lead time is 5 days and the producer wants to have a 17% safety stock factor. This producer has also cut setup costs such that the optimal production quantity is 95 units. How many kanbans does this producer of compressors require?