Answer: In all cases, gravitational potential energy, respect from a common reference level (street level for instance) is the same.
Explanation:
Gravitational potential energy, comes from the action of the gravitational field, which is a conservative one.
This means, that if someone does work against the field (for instance lifting a weight from the ground to a given height), and then drops the weight, the work done by the field will be exactly the same.
Otherwise, the object would have remaining energy after returning to the starting point, which would violate the laws of physics, specially Thermodynamic's 2nd Law.
For this reason, the gravitational potential energy only depends from the height, and is independent from the path taken to reach there.
Answer:
For a solar eclipse to occur the moon must be between the earth and the sun (the light of the sun is blocked)'
By definition this is a new moon (which occurs when the moon cannot be seen because it is located between the sun and the earth).
The correct answer is: <span>smaller than object, virtual and upright.
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When the object is placed between the focal point and the vertex of a convex mirror, then the image formed will be <span>located behind the convex mirror. It will be virtual image and an upright image but reduced in size (i.e., smaller than the object)</span>
Answer:
Explanation:
Let's use the conservation of angular momentum here. If there is a conservation the addition of both must be zero.

The momentum of inertia of both are:

The angular momentum is the product between angular velocity and momentum of inertia.
Let's solve it for ω(t).
But 
- R is the radius R=D/2 = 30 cm = 0.3 m
- V is the steady speed V = 0.74 m/s
Knowing that 2π rad is a rev. We have.
The minus sign means the track is moving opposite of the car.
I hope it helps you!