Which questions would help determine whether an article is scientifically accurate? Group of answer choices Is the author stating an opinion or a fact? Does the author have evidence for the given facts? Does the author like music? How many articles has the author written before? Does the author have a balanced diet?
Answers
0.08 gram mass of magnesium oxide will be formed.
What is mass?Mass is an intrinsic property in the mass of a body. It was the traditionally believed to the be related to the quantity of matters in the physical body, until it is discovery of the atom and particle in physics.
Mass is quantitative measure of inertia a fundamental quantity of all matters.
2Mg + O 2→2MgO
Molar mass of Mg =24 g
Molar mass of MgO =40 g
No. of moles of O2=6.022×10^20/6.022×10^23
=0.001 mole of O2
No. of moles of Mg=0.486/24
=0.02 moles of Mg
As moles of O 2
are less than 0.01, O 2
is limiting reagent and it is 0.002 moles of MgO is formed.
⇒0.002×40=0.08 g of MgO
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Related Questions
In a circuit with two identical components connected in parallel, the current which flows through its different branches will be __________. Which of the following completes the sentence?
Answers
In a circuit with two identical components connected in parallel, the current which flows through its different branches will be different.
What is parallel circuit?A parallel circuit can be defined as a type of circuit that comprises branches so that the current divides and only part of it flows through any branch.
In this type of circuit (parallel circuit) the voltage, or potential difference, across each branch of a parallel circuit is the same, but the currents may vary.
The main characteristics of parallel circuits include the follow;
current in each circuit component is differentvoltage in each circuit component is the samethe effective resistance is the reciprocal sum of individual resistanceThus, a parallel circuit will have same voltage across the circuit components and different current flowing in each components.
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3. Since Aspeon is not expected togrow, Emily believes that the following equations can be used in the valuation analysis: (1) S=[EBIT−kd(D)](1−ks)
(2) V=S+D
(3) P=(V−D0)/n0
(4) n1=n0−D/P
(5) VL=VU+TD
Answers
The equations mentioned by Emily in the valuation analysis for Aspeon are as follows:
1) Equation (1): This equation represents the value of equity (S) and calculates it based on the EBIT (earnings before interest and taxes), the tax shield provided by debt (D), and the required return on debt (kd) and equity (ks). It implies that the value of equity is equal to the adjusted EBIT after deducting the tax shield from debt.
2) Equation (2): This equation calculates the total enterprise value (V) by adding the value of equity (S) and debt (D). It represents the total worth of the company, considering both equity and debt.
3) Equation (3): This equation calculates the price per share (P) by dividing the total enterprise value (V) minus the initial debt (D0) by the number of shares (n0). It represents the price per share based on the valuation of the company.
4) Equation (4): This equation calculates the new number of shares (n1) by subtracting the dividend (D) from the initial number of shares (n0) divided by the price per share (P). It represents the adjusted number of shares after the payment of dividends.
5) Equation (5): This equation calculates the levered value (VL) by adding the unlevered value (VU) with the tax shield value (TD). It represents the value of the company after considering the tax advantages of debt.
These equations provide a framework for valuation analysis, considering factors such as earnings, taxes, debt, and equity. They help assess the value and financial implications of Aspeon's growth prospects.
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A 104.328-kg baserunner slides into home base. He starts his slide moving at 8.451 m/s and 6.596 m from home base; when he crosses home plate he is moving at 2.322 m/s. What is the coefficient of kinetic friction between the baserunner and the ground?
Answers
The coefficient of kinetic friction between the baserunner and the ground is 0.51.
Coefficient of kinetic friction
The coefficient of kinetic friction between the base runner and the ground is calculated as follows;
μ = a/g
where;
a is accelerationg is gravityv² = u² + 2as
a = (v² - u²)/(2s)
a = (8.451² - 2.322²)/(2 x 6.596)
a = 5 m/s²
μ = 5/9.8
μ = 0.51
Thus, the coefficient of kinetic friction between the baserunner and the ground is 0.51.
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if the velocity is at 0 and the accelerationis at 0 what is the motion
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11- An object of mass 0.2 kg moves in a circular path. If it makes 3/4 revolution in 0.3 s and its displacement is 6 m, calculate: a) The radius of the circular path ?
Answers
We can use the kinematic equations for circular motion to solve this problem. The equation we will use is:
θ = (s / r)
where θ is the angle of rotation (in radians), s is the displacement, and r is the radius of the circular path.
In this case, the object makes 3/4 revolution, which is equivalent to an angle of rotation of:
θ = (3/4) x 2π radians = 1.5π radians
The displacement is given as 6 m.
Therefore, we can rearrange the equation to solve for the radius:r = s / θ
r = 6 m / (1.5π radians)
r ≈ 1.273 m
Therefore, the radius of the circular path is approximately 1.273 meters.
What is a path ?
A path is a route or way that someone or something follows to reach a destination or achieve a particular goal. It can be physical or abstract, and can refer to a variety of contexts such as travel, communication, decision-making, or personal development.
A physical sense, a path can refer to a trail, road, or sidewalk that people use to walk, cycle, or drive to a particular location. In computing, a path refers to the sequence of directories and that lead to a specific file or folder.
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HELP ME IN GCSE PHYSICS PLS
Answers
Answer:
Below
Explanation:
Water that boiled off = .080 - .071 = .009 kg = 9 gm
Your question did not state the INITIAL temperature of the water
THIS answer will assume it was at its boiling point
25200 J / 9 g = 2800 J / g = heat of vaporization
Please help this is really confusing
Answers
The brakes on a 15,680 N car exert a stopping force of 640 N.
The car's velocity changes from 20.0 m/s to 0 m/s. What is the
mass of the car? (Estimate 10 N/kg for g.)
Answers
Answer:
1568 Kg is the answer
Explanation:
pulsars are thought to be group of answer choices rapidly rotating neutron stars. accreting white dwarfs. accreting black holes. unstable high mass stars.
Answers
Pulsars are thought to be a group of rapidly rotating neutron stars.
A neutron star is the dense remnant left behind after the collapse of a massive star during a supernova explosion. Neutron stars are incredibly compact and contain a high concentration of neutrons. They have masses typically around 1.4 times that of the Sun but are compressed into a sphere with a radius of only about 10 kilometers.
When a massive star undergoes a supernova explosion, the core collapses under gravity, causing the protons and electrons to merge and form neutrons. This collapse results in a highly dense neutron star with a strong gravitational field.
Pulsars, a type of neutron star, are characterized by their rapid rotation and the emission of beams of electromagnetic radiation that are observed as regular pulses of radiation. These pulses occur at precise intervals and are detectable across a range of wavelengths, from radio waves to X-rays.
The emission of radiation from pulsars is believed to be caused by two main factors:
1. Rotation: Pulsars rotate rapidly, often spinning hundreds of times per second. As the neutron star rotates, it emits beams of radiation from its magnetic poles. These beams are not aligned with the rotational axis, resulting in a lighthouse-like effect where the beams sweep across space. When the beams pass through Earth's line of sight, we detect them as regular pulses of radiation.
2. Magnetic Field: Pulsars possess extremely strong magnetic fields, typically billions of times stronger than Earth's magnetic field. This powerful magnetic field interacts with the charged particles surrounding the pulsar, causing them to emit radiation in the form of radio waves, X-rays, and gamma rays.
Accreting white dwarfs, black holes, and unstable high-mass stars are not typically associated with pulsars. Accreting white dwarfs are white dwarf stars that accrete material from a companion star, black holes are formed from the collapse of massive stars, and unstable high-mass stars are stars that undergo various stages of stellar evolution before potentially exploding as supernovae.
In summary, pulsars are believed to be rapidly rotating neutron stars with strong magnetic fields that emit beams of radiation as they rotate. Their distinct pulsing behavior makes them observable as regular pulses of electromagnetic radiation across different wavelengths.
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how much time in seconds will it take a cart to reach the bottom of the track?assume the cart starts from rest, the track is 1.5 m long and the distance covered by the cart is 1.5 m.
Answers
Around 80 times we should expect it to land on B.
What is time?Time is basically a measure of non-stop, consistent change in our own surroundings. Usually we can see through a specific point of view. Concept of time is self-evident and intuitive. Describing the fundamental nature of time is quite difficult.
The general time formula of the any kind of task that is given as [Time = Distance ÷ Speed]. for SI unit of time is seconds (s).
As per the given condition-
Spin circle=3
Time = 120 sec
the total is 3
the red and orange equals to 2
2/3 times 120
240/3
=80 times
Thus, the correct answer is 80 times.
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a manufacturer of air compressors claims that the lifetime of their compressors under typical use has a mean life of 60 monthswith a standard deviation of 4 months, but the comparable air compressors from the competing manufacturer has a mean life of55 months with a standard deviation of 10 months. suppose we randomly select 64 compressors from this manufacturer and 80
Answers
The null hypothesis for this comparison is that the two manufacturers have the same mean lifetime for their compressors.
What is compressor?
A compressor is indeed a mechanical device that lowers a gas's volume while raising its pressure. One particular kind of gas compressor is an air compressor. Pumps and compressors share characteristics in that both raise the pressure on a fluid and can move it through a pipe. The primary difference is that a compressor works to change a fluid's density or volume, which is typically only possible with gases. Compressors are frequently used for gases because liquids cannot be compressed as much as gases can. A pump's primary function is to pressurise and move liquids. To increase discharge pressure, many compressors can be staged, which involves repeatedly compressing the fluid in small steps or stages.
To test this hypothesis, we can use a two-sample t-test. Assuming that the two samples are independent and normally distributed, the test will yield a p-value. If the p-value is less than 0.05, then we can reject the null hypothesis and conclude that the two manufacturers have different mean lifetimes for their compressors.
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A .35kg hoover ball is sliding across the floor at 11m/s due East when it hits a hairball wrapped in gum(.045kg) sitting on the floor. The hoover ball and hair/gumball stick together and end up going 32 degrees South of East after the collision. What is the resultant velocity of the hoover/hair/gumball?
Answers
Given,
The mass of the hoover ball, m₁=0.35 kg
The velocity of the hoover ball before the collision, u=11 m/s
The mass of the hair/gumball, m₂=0.45 kg
The direction in which the hoover/hair/gumball goes after the collision, θ=32°
Let us assume that the eastward direction represents the positive x-axis and the northward direction represents the positive y-axis.
According to the law of conservation of momentum, the momentum is conserved in x and y directions separately and simultaneously.
Thus,
\(m_1u=(m_1+m_2)\times v\cos \theta\)Where v is the velocity of the hoover/hair/gumball after the collision.
On substituting the known values,
\(\begin{gathered} 0.35\times11=(0.35+0.45)\times v\times\cos 32^{\circ} \\ \Rightarrow v=\frac{0.35\times11}{(0.35+0.45)\times\cos 32^{\circ}} \\ =5.67\text{ m/s} \end{gathered}\)Thus the resultant velocity of the hoover/hair/gumball after the collision is 5.67 m/s.
the wedge shaped prominence that projects from the cheek over the ear passage fro protection is identified as the
Answers
The correct option is (a)Tragus. The wedge-shaped prominence that projects from the cheek over the ear passage for protection is commonly referred to as the Tragus.
It is located at the opening of the ear canal and helps to protect the ear from external damage and debris. The tragus is a small, fleshy structure with a rounded or pointed tip that can be felt when pressing on the ear. It plays an important role in hearing as it helps to direct sound into the ear canal, and it is also a common site for ear piercings. One of the main functions of the tragus is to protect the ear from external damage and debris. It acts as a barrier, helping to prevent foreign objects from entering the ear canal and potentially causing harm. This is especially important given the delicate and sensitive nature of the structures within the ear, including the eardrum and delicate bones of the middle ear. In addition to its protective function, the tragus also plays an important role in hearing. By directing sound into the ear canal, the tragus helps to improve the quality of sound that is received by the ear. This improved sound quality can result in better hearing and a clearer perception of the sounds around us. Finally, the tragus is a common site for ear piercings. Given its fleshy nature and relatively prominent position, it is an ideal location for piercing and can provide a visually appealing accent to the ear. There are many different styles and types of jewelry that can be used with a tragus piercing, allowing individuals to express their unique sense of style.
The complete question is:
The wedge shaped prominence that projects from the cheek over the ear passage fro protection is identified as the:
(a)Tragus
(b)Antihelix
(c) Helix
(d) Concha
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what must be happening, according to newton's second law of motion, if a rigid body of unchanging mass is observed accelerating? responses a force was once applied but is now not being applied. a force was once applied but is now not being applied. the mass must be changing. the mass must be changing. no force was or is being applied to the mass. no force was or is being applied to the mass. a force is being applied to the mass. a force is being applied to the mass.
Answers
A force is being applied to the mass.
What is the cause of this acceleration in terms of Newton's second rule of motion?Newton's second law states that when a constant force is given to a big body, it will accelerate or change its velocity at a constant rate. In the simplest case, if a force is applied to an object at rest, the object will accelerate in that direction.
What practical implications does Newton's second law of motion have for us?Newton's second law states that a force can alter a body's motion.
A body's momentum changes in size and direction at the same rate as the force pushing on it.
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What is quantum, in your own words but be more detailed.
Answers
Answer: Quantum is really just an amount of any physical entity involved in an interaction.
Explanation:
One reactant concentration is When using the method of initial rates for a kinetic study, the reaction is performed choose... kept constant, and the other choose...
Answers
When doing a kinetic research utilizing the method of starting rates, the reaction is repeated several times. While the concentration of one reactant fluctuates, the other is maintained constant.
What, using an example, is concentration?You can determine what more solute has been dispersed in the solvent by looking at the level of the solution's concentration. For instance, the concentration may be stated as 1 teaspoon of salt per 2 cups of water if you add 1 teaspoon to 2 cups of water.
How are concentration levels determined?Molarity, a typical measurement used for this, is utilized. Molarity (M) is calculated by dividing the volume of the solution (V) in liters by the quantity of moles for solute (n). It's critical to remember that its molarity is determined by the moles of the solute in liter fluid.
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The complete question is-
When using the method of initial rates for a kinetic study, the reaction is performed ____. One reactant concentration is kept constant, and the other _____.
Which object absorbs the most sound waves
Answers
Answer:
Earplugs
Explanation:
The objects that absorb the most sound waves are usually soft and flexible or porous. So, the object that satisfies the first two characteristics is Earplugs. It means that the answer is Earplugs.
How much time does it take to use 300 W of power to do 1800 J of work? Round your answer to the nearest whole
number
The time is
S.
Done
Intro
Answers
Answer:
6 seconds
Explanation:
A 15 kg child slides down a 5 m tall (vertical) slide that is inclined to the horizontal 34°. Her velocity is 5 m/s at the bottom of the sled. How much mechanical energy was lost to friction?
Answers
ANSWER
547.5 J
EXPLANATION
Given:
• The child's mass, m = 15 kg
,• The height of the slide, h = 5 m
,• The velocity of the child at the bottom of the slide, v = 5 m/s
Find:
• The loss of mechanical energy due to friction
The loss of mechanical energy due to friction is the difference between the child's gravitational potential energy at the top of the slide, and the child's kinetic energy at the bottom of the slide,
\(PE-KE=mgh-\frac{1}{2}mv^2\)Replace the known values and solve,
\(PE-KE=15kg\cdot9.8m/s^2\cdot5m-\frac{1}{2}\cdot15kg\cdot5^2m^2/s^2=735J-187.5J=547.5J\)Hence, 547.5 Joules of energy were lost due to friction.
numerical problemsnumerical problems:
convert the following as instructed.
340cm into m
plzz,explain in step by step
Answers
Answer:
3.4m
Explanation:
As 1 m = 100cm
So 1cm = 1/100 m or 0.01m
To convert 340cm into m simply divide it by 100
Which formula for net force contains an error?
A) \(F_{net} =\) Δv/Δt
B) \(F_{net} =\) mΔv/Δt
C) \(F_{net} =\) ma
D) \(F_{net} =\) Δp/Δt
Answers
Answer:
A) lacks the mass of the object
What is the weight of an object a mass of 90.0kg?
Answers
Explanation:
it would be 198.4
you're welcoms
PLEASE HELP PHYSICS, CONNECTIONS ACADEMY
1. In a closed system, three objects have the following momentums: 110 kg⋅m/s, −65 kg⋅m/s, and −100 kg⋅m/s. The objects collide and move together. What is the total momentum after the collision?(1 point)
−55 kg⋅m/s
−275 kg⋅m/s
55 kg⋅m/s
275 kg⋅m/s
2. In a closed system, a ball with a mass of 3 kg and a momentum of 24 kg·m/s collides into a ball with a mass of 1 kg that is originally at rest. Which statement describes the momentum of the balls and the total momentum?(1 point)
The momentum of each ball stays the same, and the total momentum stays the same.
The momentum of each ball changes, and the total momentum changes.
The momentum of each ball stays the same, and the total momentum changes.
The momentum of each ball changes, and the total momentum stays the same.
3. In a closed system, an object with a mass of 1.5 kg collides with a second object. The two objects then move together at a velocity of 50 m/s. The total momentum of the system is 250 kg⋅m/s. What is the mass of the second object? (1 point)
5.0 kg
1.5 kg
3.5 kg
3.0 kg
Answers
Answer:
(1) the total momentum is 275 kgm/s
(2) The momentum of each ball changes, and the total momentum stays the same.
(3) The mass of the second object is 3.5 kg
Explanation:
(1) In a closed system the total momentum is constant, it never changes.
For the given momentums, the total momentum is given as;
Total momentum = 110 kgm/s + 65 kgm/s + 100 kgm/s = 275 kgm/s
(2) Given;
Initial momentum of the ball at rest, P = mv
where;
m is mass of the ball = 1 kg
v is velocity of the ball = 0 (at rest)
P = 1 x 0 = 0
Initial momentum of the ball in motion = 24 kgm/s
The total momentum of the system = 0 + 24 kgm/s = 24 kgm/s
Thus, the total momentum of the system remains the same while the momentum of each ball changes after collision, because the ball at rest had zero momentum at initial but changed to 24kgm/s after collision.
The momentum of each ball changes, and the total momentum stays the same.
3.
mass of first object m₁ = 1.5 kg
common velocity of both objects after collision, v = 50 m/s
total momentum of the system, P = 250 kgm/s
let the mass of the second object = m₂
v(m₁ + m₂) = P
v(m₁ + m₂) = 250
50(1.5 + m₂) = 250
1.5 + m₂ = 250 / 50
1.5 + m₂ = 5
m₂ = 5 - 1.5
m₂ = 3.5 kg
Answer:
Quick check: D, A, C, D, C
Explanation:
From an interdependency perspective, which of the following factors does power depend on?
A) The control of valuable resources
B) The control of access to valuable resources
C) A partner's high desire for a particular resource
D) All of the answers are correct.
Answers
D) All of the answers are correct.
Power, from an interdependency perspective, depends on all of the factors mentioned in the given options.
A) The control of valuable resources: Having control over valuable resources gives individuals or entities power because they can leverage these resources to influence others and shape outcomes.
B) The control of access to valuable resources: Controlling access to valuable resources provides power because it allows individuals or entities to regulate who can obtain those resources, creating dependency and influencing the behavior of others.
C) A partner's high desire for a particular resource: When a partner or another party has a strong desire for a specific resource, it can grant power to those who possess or control that resource. The high demand for the resource enhances the power of the resource holder in negotiations or relationships.
Therefore, all of these factors contribute to power dynamics by providing individuals or entities with advantages and leverage in various social, economic, and interpersonal contexts.
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what happens when a force is applied in the direction of motion of a body
Answers
Answer:
If the force applied on the object is in the direction of its motion, the speed of the object increases. If the force is applied in the direction opposite to the direction of motion, then it results in a decrease in the speed of the object.
what caused the rate of the erosion to change around 1905 and 1906
Answers
Answer:
What caused the slope to change around 1905 and 1906? Building the Canadian hydroelectric plant reduced the rate of erosion after 1906. This change in the rate of erosion is represented by the change in the slope on the graph. Hydroelectric dams convert kinetic energy from moving water to electrical energy.
Answer:
In 1906, around the time the Canadian hydroelectric plant began operating, the erosion rate decreased to approximately 0.7 meters per year.
Explanation:
the drag force from air resistance is given by F= pACv2/2. where p is the density of air, A is the cross-sectional area (assume to be a circle), C is the drag coefficient based on shape and v is the speed. You may guess that larger raindrops may have a larger terminal speed, but let's see if this is true. Assume a spherical raindrop of radius r and density p.. I) Derive an expression for the terminal speed of the raindrop in terms of r, C, g. pw and p. (where p, is the density of air that is in the drag force expression). Mass cannot be in your expression. il) From your expression, if you double the radius, what happens to the terminal speed?
Answers
The terminal speed of a raindrop is proportional to the square of the radius.
If the radius is doubled, the terminal speed will quadruple.
The terminal speed of a raindrop is the speed at which the drag force from air resistance balances the force of gravity. The drag force is given by F = pACv^2/2, where p is the density of air, A is the cross-sectional area, C is the drag coefficient, and v is the speed.
The cross-sectional area of a spherical raindrop is A = πr^2, where r is the radius of the raindrop.
The force of gravity is given by F = mg, where m is the mass of the raindrop and g is the acceleration due to gravity.
For a raindrop to reach its terminal speed, the drag force must equal the force of gravity. This means that pACv^2/2 = mg.
Solving for v, we get v = (2mg)/(pCπr^2).
The terminal speed is proportional to the square of the radius. This means that if the radius is doubled, the terminal speed will quadruple.
v = (2mg)/(pCπr^2)
If r = 2r, then v = (2mg)/(pCπ(2r)^2) = 4 * (2mg)/(pCπr^2) = 4v
Therefore, the terminal speed will quadruple.
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Please help Give relationship among centigrade, fahrenheit and kelvin scale
Answers
The basic formula is °C + 273.15 = K. The basic formula for converting Fahrenheit into Celsius is (°F − 32) × 5/9 = °C. To convert Fahrenheit degrees into Kelvins, (°F − 32) × 5/9 + 273.15 = K.
Martin Luther King, Jr., was awarded the Noble Peace Prize * Yes No
Answers
Answer
Explanation:
duh he was fighting for peace half of his life
the ice is completely melted before the time interval begins, but no boiling occurs during the interval.
Answers
Answer:
THE ANSWER IS
Explanation:
