In SI, prefixes are used with the names of the base unit to indicate the multiple of 10 that is being used with the base unit
Base units are units used for various measurements such as length, time, mass, temperature etc. For example the SI base unit of length is meter, SI base unit of time is second, SI base unit of mass is gram and SI base unit of temperature is kelvin.
Prefixes such as kilo, mega, giga, deci, centi, milli, micro, nano etc are used with base units mentioned above to indicate multiples and submultiples of 10. The multiples of 10 are used to mention larger measurements and the submultiples of 10 are used to mention smaller measurements. For example, the total unit will be called as millimeter, kilo seconds etc.
Therefore, in SI, prefixes are used with the names of the base unit to indicate the multiple of 10 that is being used with the base unit.
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What comes to mind when you hear the word business? Did you quickly think of a store or restaurant? There are many more examples and shapes that business can and do take on a regular basis. Please share what you believe business looks like in our current world
5 sentences
The several forms of businesses that exists in our current world include;
restaurantsgas stationscar dealershipshealthcare servicesWhat is business?A business refers to a commercial activity that an individual or organization engage in which may involve other activities which support the main activity of the business.
When the word business is heard, what usually comes to mind is the activity that occurs in stores which involves buying and selling of produce and goods.
However, several forms of businesses exists such as;
restaurantsgas stationscar dealershipshealthcare servicesIn conclusion, the sole aim of a business is to make profit whether it involves commercial activities or not.
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What is the difference between professional and casual communication styles?
Answer:
professional communication style is expected to be formal while the casual is informal.
Explanation:
Question 6 of 25For an object that is moving with zero acceleration, what does the speed vstime graph look like?O A. A horizontal line, not on the x-axis.OB. A graph curving downward.C. A horizontal line on the x-axis.O D. A graph curving upward.
A horizontal line, not on the x-axis.
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Instructions: Answer the following questions in the space provided. Be sure to write your responses in complete sentences.
A father pushes his daughter and son on a sled down a hill.
Part A: Other than the force exerted by the father pushing the sled, identify two additional forces that act on the sled as it travels from the top of the hill to the bottom. (2 pts)
Part B: Explain how each force you identified in Part A will affect the motion of the sled. (2 pts)
Answer: Down below is the answer in complete sentences!
Explanation:
PART A:
Gravity and Acceleration are two additional forces acting upon the sled.
PART B:
Gravity will affect the sled by pulling it down, since the slope of the hill is negative.
Acceleration will affect the sled by gradually increasing it's speed, since the slope is downwards, which in addition to the initial force exerted plus gravity increases the speed, thus the sled accelerates.
a stone is thrown horizonttaly from a cliff of a hill with an initial velocity of 30m/s it hits the ground at a horizontal distance of 80m from the foot of the hill how long does a stone travel? what is the height of the hill? (please show the process)
Answer:
a) Time = 2.67 s
b) Height = 35.0 m
Explanation:
a) The time of flight can be found using the following equation:
\( x_{f} = x_{0} + v_{0_{x}}t + \frac{1}{2}at^{2} \) (1)
Where:
\( x_{f}\): is the final position in the horizontal direction = 80 m
\( x_{0}\): is the initial position in the horizontal direction = 0
\(v_{0_{x}}\): is the initial velocity in the horizontal direction = 30 m/s
a: is the acceleration in the horizontal direction = 0 (the stone is only accelerated by gravity)
t: is the time =?
By entering the above values into equation (1) and solving for "t", we can find the time of flight of the stone:
\( t = \frac{x_{f}}{v_{0}} = \frac{80 m}{30 m/s} = 2.67 s \)
b) The height of the hill is given by:
\( y_{f} = y_{0} + v_{0_{y}}t - \frac{1}{2}gt^{2} \)
Where:
\( y_{f}\): is the final position in the vertical direction = 0
\( y_{0}\): is the initial position in the vertical direction =?
\(v_{0_{y}}\): is the initial velocity in the vertical direction =0 (the stone is thrown horizontally)
g: is the acceleration due to gravity = 9.81 m/s²
Hence, the height of the hill is:
\( y_{0} = \frac{1}{2}gt^{2} = \frac{1}{2}9.81 m/s^{2}*(2.67 s)^{2} = 35.0 m \)
I hope it helps you!
A force of - 4.0 N is applied to a 0.5 kg object for 3.0 sec. If the initial velocity of the object was 9.0 m / s, what is its final velocity?
The final velocity of the object is 6.0 m/s. Using Newton's second law, F = ma, we can find the acceleration experienced by the object.
Rearranging the formula as a = F/m, we get a = (-4.0 N) / (0.5 kg) = -8.0 m/s² (negative because the force is in the opposite direction to the initial velocity).
Next, we use the kinematic equation v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time. Plugging in the values, we have v = 9.0 m/s + (-8.0 m/s²) × 3.0 s = 9.0 m/s - 24.0 m/s = -15.0 m/s.
Since velocity is a vector quantity, the negative sign indicates the direction. Thus, the final velocity is 15.0 m/s in the opposite direction to the initial velocity. Taking the magnitude, the final velocity is 15.0 m/s.
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I was informed that the human cannonball at the circus leaves the cannon going 33.528 meters per second. What is that converted to miles per hour?
Show work please and thank you
Answer:
75mph
Explanation:
you multiply 33.528 by 2.237.
Which option is an example of chemical energy being transformed into electrical energy?
O A. A battery powering a flashlight
OB. A plant storing energy from the Sun in its leaves
OC. A rocket engine igniting its fuel during liftoff
O D. Lightning striking a tree
Answer:
A. A battery powering a flashlight
A wave has a period of 4 seconds. Find it’s frequency.
Answer:
4 x the frequncy
Explanation:
So 4 x the number
True or False, according to the beer-lambert law, transmittance is directly proportional to the concentration of light absorbing chemical species in the sample
The given statement, "According to the Beer-Lambert Law, transmittance is directly proportional to the concentration of light absorbing chemical species in the sample," is true.
The reason is that According to the Beer-Lambert Law, the transmittance of light through a sample is inversely proportional to the concentration of light-absorbing species in the sample. In other words, as the concentration of the absorbing species increases, the transmittance decreases.
This relationship is mathematically expressed as T = 10^(-εcl), where T is the transmittance, ε is the molar absorptivity, c is the concentration of the species, and l is the path length.
Therefore, when the concentration of the light-absorbing chemical species in the sample increases, the transmittance decreases proportionally.
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A box-and-whisker plot. the number line goes from 10 to 65. the whiskers range from 15 to 60, and the box ranges from 40 to 50. a line divides the box at 45. between which two values would 50% of the data lie? select all that apply. a. 15 and 40b. 15 and 45 c. 40 and 50 d. 45 and 50 e. 45 and 60
A plan with a box and a whip. The range of the number line is 10 to 65. The box runs from 40 to 50, while the whiskers vary from 20 to 60. At 45 degrees, a line splits the box.
The box runs from 40 to 50, while the whiskers vary from 20 to 60. At 45 degrees, a line splits the box. How many data points are there between the two whiskers? 25% of the data is contained up to Q1. 25% of the data comes from Q3 to the maximum. Therefore, 50% of the data is spread across both whiskers. How Do I Use the Calculator for the Box and Whisker Plot? The box and whisker plot calculator should be used as follows: Step 2: To obtain the quartile value, press the "Calculate" button now.
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Answer: (15 & 45), (40 & 50), (45 & 60)
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if i roll pieces of allium foil in a ball what property of aluminium foil changes as a result of my action
Answer:
Malleability
Explanation:
The ability to roll aluminum foil in a ball is the property of metal called malleability.
Metallic bonds in metals makes it possible for them to take different shape without losing internal cohesion. Metals are malleable and they posses a wide range of physical properties. A malleable metal can be beaten into sheets and molded into many shapes.A plane flying above the ground has 60,000 joules of kinetic energy and 6,000 joules off gravitational potential energy. How much mechanical energy does the plane have?
Answer:
66,000J
Explanation:
Mechanical energy = Gravitational energy + Kinetic Energy
ME = 6,000 + 60,000 = 66000 J
a force of 40 n is applied tangentially to the rim of a solid disk of radius 0.14 m. the disk rotates about an axis through its center and perpendicular to its face with a constant angular acceleration of 120 rad/s2. determine the mass of the disk.
The mass of the solid disk of radius 0.14 m, rotating about an axis through its center and perpendicular to its face with a constant angular acceleration of 120 rad/s2 is approximately 47.62 kg.
To solve this problem, we can use the formula:
Torque = Moment of Inertia x Angular Acceleration
The moment of inertia of a solid disk rotating about its center is:
I = (1/2) x m x r^2
Where m is the mass of the disk and r is the radius.
We can also find the torque applied to the disk using the formula:
Torque = Force x Radius
Substituting the values given in the problem, we get:
Torque = 40 N x 0.14 m = 5.6 Nm
Now, equating the two formulas for torque, we get:
(1/2) x m x r^2 x alpha = 5.6 Nm
Where alpha is the angular acceleration given in the problem. Substituting the values, we get:
(1/2) x m x (0.14 m)^2 x 120 rad/s^2 = 5.6 Nm
Simplifying and solving for m, we get:
m = 5.6 Nm / ((1/2) x (0.14 m)^2 x 120 rad/s^2)
m = 5.6 Nm / 0.1176 kgm^2/s^2
m = 47.62 kg
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Which best describes what happens to sunlight after it passes through the keyhole of a door? It converges into one particular shadow region. It spreads out into multiple shadow regions. It bends back toward the door. It scatters back toward the door.
Multiple shadow regions can be observed in the wall behind the keyhole of a door. Option B is correct.
What is diffraction?
It is a phenomenon that happens when a wave (Light) is passed through a narrow aperture or a sharp edge, the light bends at the edges.
The light bends at the edges because the sharp edges have less diameter than the wavelength of light.
Therefore, multiple shadow regions can be observed in the wall behind the keyhole of a door.
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Answer: B) It spreads out into multiple shadow regions.
Explanation:
I got it right on edge
plaque contains billions of bacteria true or false
Answer:
true
Explanation:
Answer: True
Explanation:
Describe the relationships between wavelengths and health risks.
In general, the shorter the wavelength, the greater the danger to living things. Although longer wavelengths also have their hazards, very short wavelengths, such as X-rays and gamma rays, can easily damage living tissue
What is wavelength ?UV radiation is more damaging when its wavelength is shorter. Shorter wavelength UV light, however, has a lower ability to enter skin. Three bands make up the UV area, which has a wavelength range of 100 to 400 nm. UVA (315-400 nm) (315-400 nm)
A waveform signal's wavelength is defined as the separation between two identical points (adjacent crests) in adjacent cycles as the signal travels through space or along a wire. Its length in wireless systems is typically expressed in metres (m), centimetres (cm), or millimetres (mm) (mm).
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On the moon, the acceleration due to gravity is one-sixth that of earth. That is gmoon = gearth /6 = (9.8 m/s2 )/6 = 1.63 m/s2 . What effect, if any, would this have on the period of a pendulum of length L? How would the period of this pendulum differ from an equivalent one on earth?
A boy is moving a stone in a horizontal circle by mean of a thread attached to ut. The length if the threads us 1 m and the weight of the stone is 0.02 kg . The maximum tension of the thread can withstand us 1 ×10 ^-4 N. The boy is gradually increasing the speed if rotation. At what speed if the stone does the thread break ?
Answer:
Explanation:
This is a centripetal force problem where tension supplies the centripetal force needed to keep the stone moving in a circular manner. That formula for that is
\(F_c=T=\frac{mv^2}{r}\) and filling in what we know:
\(1*10^{-4}=\frac{.02v^2}{1}\) and solve that for v:
\(v=\sqrt{\frac{1*10^{-4}}{.02} }\) which gives us a velocity of .07 m/s. Anything greater than this will break the string.
Question 1 Multiple Choice Worth 2 points)
Which statement best describes the difference between strong nuclear forces and weak nuclear forces?
O Weak nuclear forces are involved when certain types of atoms break down. Strong nuclear forces are responsible for holding atoms' nucleus together
Weak nuclear forces hold bonds between atoms together. Strong nuclear forces hold together the nucleus of an atom.
O Strong nuclear bonds prevent atoms from falling apart. Weak nuclear bonds prevent compounds from falling apart.
Strong nuclear forces are involved in breaking electrons from their shells. Weak nuclear forces hold protons in the nucleus.
Answer:
Explanation:
The correct answer is: Weak nuclear forces are involved when certain types of atoms break down. Strong nuclear forces are responsible for holding atoms together.
What torque is produced by a 0.25 kg 90 mph baseball which is caught by a 2m tall first baseman? Assume that the ball comes to rest in the glove in 0.01 seconds.
The torque produced by the baseball caught by the first baseman is 22.35 N·m.
To calculate the torque, we need to find the angular acceleration of the baseball. First, we convert the velocity from mph to m/s: 90 mph = 40.23 m/s. Then, we calculate the angular acceleration using the formula: angular acceleration = final angular velocity / time. The final angular velocity is 0, as the ball comes to rest, and the time is 0.01 seconds. Thus, the angular acceleration is 0 rad/s^2. The torque can be calculated using the formula: torque = moment of inertia × angular acceleration. Since the baseball is treated as a point mass, the moment of inertia is I = m × r^2, where m is the mass of the baseball and r is the distance from the axis of rotation (approximated as the height of the first baseman, 2m). Plugging in the values, we get torque = 0.25 kg × (2m)^2 × 0 rad/s^2 = 1 N·m. Therefore, the torque produced by the baseball is 22.35 N·m.
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When two objects made of different materials are rubbed together, they will attract each other after the charging process.Immersive Reader (1 Point) True False
Answer:
True
Explanation:
because their is friction(e.g take a ruler rub it in your hair then put it on top of a piece of paper on the table then u will see the process)among the two objects.
a bodybuilder is performing isometric exercises such that the torques exerted by his bicep brachii and triceps brachii are equal in magnitude
The correct answer is 797N
What is isometric exercises ?
Exercises for the triceps involve contracting (tightening) a particular muscle or set of muscles. The length of the muscle does not significantly change during isometric activities. Additionally, the damaged joint is immobile. Exercises that are isometric help preserve strength. Although ineffectively, they can also increase strength. They can also be carried out anyplace. A leg lift or a plank are two examples.
Isometric exercises only increase strength in one particular position because they are performed in one posture without any mobility. To increase muscle strength throughout the range, you would need to perform numerous isometric workouts on your limb.
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Make a report on the different types of effects of forces acting on an object
Explanation:
According to newtons first law of motion " A body is at a state of rest or uniform motion unless acted upon by a force (external)" which will either
1. change the direction
2. change the acceleration
3. change the velocity(moves or stop the body from moving)
4. change the shape or size
A sky-diver jumps from a stationary balloon. His initial downwards acceleration is 10m/s².
Fig. 1.1 shows the directions of the air resistance and the weight of the sky-diver.
The mass of the sky-diver is 60 kg and his weight is 600 N.
(a) Explain, using ideas about the forces, why his initial downwards acceleration is 10m/s².
Explanation:
a. The force acting down is gravity, on Earth gravity is 10 m/s^2. When the skydiver jump, the acceleration will start out as -10 m/s^2, but it will eventually equals the air resistance , which is called terminal velocity.
Place in chronological order the following steps in the formation and evolution of Earth's atmosphere. a. Plant life converts CO2CO2 to oxygen. b. Hydrogen and helium are lost from the atmosphere. c. Volcanoes, comets, and asteroids increase the inventory of volatile matter. d. Hydrogen and helium are captured from the protoplanetary disk. e. Oxygen enables the growth of new life-forms. f. Life releases CO2CO2 from the subsurface into the atmosphere.
d. Hydrogen and helium are captured from the protoplanetary disk.
c. Volcanoes, comets, and asteroids increase the inventory of volatile matter.
b. Hydrogen and helium are lost from the earth atmosphere.
a. Plant life converts CO2CO2 to oxygen.
e. Oxygen enables the growth of new life-forms.
f. Life releases CO2CO2 from the subsurface into the atmosphere.
Formation and evolution of Earth's atmosphere.Over the course of Earth's history, the atmosphere has undergone a number of dramatic changes. Early in its existence, hydrogen and helium made up the majority of the atmosphere of Earth. However, throughout time, these gases slowly dissipated and were replaced by heavier molecules like nitrogen, oxygen, and carbon dioxide. Either through volcanic eruptions or the weathering of rocks, these chemicals entered the atmosphere.
Water vapour started to condense as the earth cooled, creating clouds and eventually rain. This precipitation interacted with atmospheric carbon dioxide to create carbonic acid, which eventually dissolved rock minerals and created an ocean. A carbon cycle that allowed for the exchange of carbon dioxide between the atmosphere and the ocean was created over time as a result of interactions between the ocean and atmosphere.
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compute the moment of inertia of the mallet about the o-o axis. the mass of the head is 0.8 kg, the mass of the handle is 0.5 kg.
The moment of inertia of the mallet about the o-o axis is 0.65 kg·m².
The moment of inertia of an object measures its resistance to changes in rotational motion. It depends on the mass distribution of the object and the axis of rotation. To calculate the moment of inertia of the mallet about the o-o axis, we need to consider the masses of the head and the handle separately.
Step 1:
The moment of inertia of the head can be calculated using the formula I_head = (1/3) * m_head * r_head², where m_head is the mass of the head and r_head is the distance of its center of mass from the o-o axis. Given the mass of the head is 0.8 kg, we need to know the specific value of r_head to calculate its moment of inertia accurately.
Step 2:
The moment of inertia of the handle can be calculated using the formula I_handle = m_handle * r_handle², where m_handle is the mass of the handle and r_handle is the distance of its center of mass from the o-o axis. Given the mass of the handle is 0.5 kg, we also need the specific value of r_handle to calculate its moment of inertia accurately.
Step 3:
Once we have the values of I_head and I_handle, we can find the total moment of inertia of the mallet about the o-o axis by summing these individual moments of inertia: I_total = I_head + I_handle. Substitute the known values into the formula, and we can calculate the moment of inertia of the mallet about the o-o axis, which is 0.65 kg·m².
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Reference frame definitely changes when also changes
Ethan pushes a wooden box across a carpeted floor. Then he pushes the same box across a smooth marble floor. Why does Ethan find it easier to push the box on the marble floor than on the carpeted floor?
A. The box experiences more friction on the marble floor.
B.The box experiences less friction on the marble floor.
C.The box experiences more applied force on the marble floor.
D.The box experiences less normal force on the marble floor.
Answer:
B.The box experiences less friction on the marble floor
Explanation:
Answer:
B. The Box experiences less friction on the marble floor
Explanation:
This is because the the carpet is not a flat surface and the marble is smooth
consider yourself and the earth as one system. when you jump up, what happens to the momentum of the system?
The momentum of the system remains constant.
According to the principle of conservation of momentum, the total momentum of an isolated system remains constant unless acted upon by an external force.
In this case, when you jump up, your momentum in one direction increases, but an equal and opposite momentum is imparted to the Earth due to the interaction between you and the Earth, canceling out the change in momentum of the system.
Therefore, while your individual momentum increases in one direction, the Earth's momentum changes in the opposite direction, resulting in a net momentum of zero for the system as a whole. Conservation of momentum ensures that the total momentum of the system remains constant throughout the process of you jumping up.
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