What is acceleration?a. change in velocity/change in time
b. change in distance/change in time
c. change in mass/change in volume
d. change in pressure/change in time
Answers
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An apple is placed 20.0 cm in front of a diverging lens of focal length 10.0 cm. Find the image distance and the magnification of the apple.
The pressure of a fluid at a specific depth depends only on the type of fluid?
How does the atmosphere balance the unequal heating of Earth's surface
b. increase the area over which the person’s weight is distributed.
c. increase the pressure on the snow.
d. increase the buoyancy of the person.
Answers
Answer:
Option B is correct.
Explanation:
Snowshoes has large area of crossection.
As a person wears the snowshoes, the weight of the person distributed over a large area and thus the pressure exerted by the surface due to the weight of the person is less.
The relation among pressure, force and area of crossection is given below.
As area of crossection is large, pressure is small and thus the person walk on deep snow.
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Answer:
Vesicular texture refers to volcanic rocks that contain holes called vesicles that were formed by gas bubbles in lava. This igneous rock is called scoria. The vesicles form from escaping gas bubbles in cooling lava.
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Answer: If one billiard ball hits another, the second will move with the same force as the first.
A child wants to jump to climb a tree (reaction), he must push the ground to propel himself (action).
A man deflates a balloon; the force with which the air comes out causes the balloon to move from one side to the other.
Explanation:
-Hitting A Wall
-Rowing a boat
-Walking
Explanation:
1.If you hit a Wall with your hands or legs, you get hurt. Why?
Because of Newton's Third Law. You hit the wall with a force and that exact same amount of force is returned by the wall.
2. While Rowing a boat, when you want to move forward on a boat, you paddle by pushing the water backwards, causing you to move forward.
3.While Walking, You push the floor or the surface you are walking on with your toes, And the surface pushes your legs up, helping you to lift your legs up.
Answers
Answer:
Gamma rays
Explanation:
Gamma rays are usually defined as a type of electromagnetic radiations, that are characterized by the presence of shorter wavelength and higher energy. These are the common radiations that are released from the radioactive substances, where an unstable nucleus of an atom releases an excess amount of energy by undergoing continuous electromagnetic processes.
These are harmful to humans and other organisms, as they are comprised of very high energy and they can easily penetrate through the bodies of humans and other organisms.
These gamma particles are emitted in the power plants, where the people working in it wear a special type of device that helps them in monitoring the exposure to radiation.
It could also be gamma rays i don't really know
c. in the same direction as
b. less than
d. in the opposite direction of
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Answer : (D) " in the opposite direction of "
Explanation :
It is given that when object A collides with object B and bounces back. This shows that the collision is elastic. There are two conditions for elastic collision :
(1) The momentum remains conserved
(2) Kinetic energy is conserved.
We know that momentum is defined as the product of mass and velocity. After bouncing back, the direction of velocity gets changed. So, the final momentum is in the opposite direction of its initial momentum.
So, the correct option is (D).
Answers
Fred gained (110lbs x 14ft) = 1540 ft-lbs of energy
Since they both took the same amount of time, Fred's power (rate
of doing work) was greater than Bob's power (rate of doing work).
Answer:
Bob gained (80lbs x 14ft) = 1120 ft-lbs of energy.
Fred gained (110lbs x 14ft) = 1540 ft-lbs of energy
Since they both took the same amount of time, Fred's power (rate
of doing work) was greater than Bob's power (rate of doing work).
Explanation: