If an ice cube melts at 0°C but water freezes at 0°C what is the difference between melting and freezing in terms of energy involved with phase changes and be particles of substances during the phase changes?

A small block with mass 0.200 kg is released from rest at the top of a frictionless incline. The block travels a distance 0.202 m down the incline in 2.00 s. The 0.200 kg block is replaced by a 0.400 kg block. If the 0.

A cheetah can run 100 meters in 7 seconds. What is the average speed for a cheetah? A goped drives 200 meters in 2 minutes. How fast is the goped going?

Why does a dropped feather hit the ground later than a rock dropped at the same time? * The weight of the rock The mass of the rock The air resistance on the feather Feathers are designed for flight

A person observes that in the winter, his hair stands on end when it is brushed. This is because his hair becomes positively charged. Why does the act of brushing make his hair positively charged?

The angular size of the smallest features that a telescope can see is called the angular

How has increased energy use associated with scientific advancements affected society? a. It has led to an increase of the concentration of atmospheric carbon dioxide. b. It has led to an increase in hazardous wastes from mining operations. c.

Water is moving with a speed of 5.7 m/s through a pipe with a cross-sectional area of 4.8 cm2. The water gradually descends 9.2 m as the pipe increases to 8.8 cm2. (a) What is the speed at the lower level? (b) If the pressure at the upper level is 1.

Is Kepler's constant the same for moons orbiting a planet as it is for planets orbiting the sun? Why?

In which one of the following situations is zero net work done? A) A ball rolls down an inclined plane. B) A physics student stretches a spring. C) A projectile falls toward the surface of Earth.

Object dropped from height of 25 meters, what velocity will it hit the ground?