What do snow melting, water freezing to ice, and water boiling into steam have in

common? *

O

They involve a change in state.

They involve a change in temperature.

O

They involve a change in thermal energy.

All of the above are true.

How many km are equal to 5,995 dm?

Two charged particles repel each other with a force f. if the charge of one of the particles is doubled and the distance between them is doubled, then the force will be

A box weighing 46 newtons rests on an incline that makes an angle of 25° with the horizontal. What is the magnitude of the component of the box's weight perpendicular to the incline? (1) 19 N (2) 21 N (3) 42 N (4) 46 N

When you decrease the length of the effort arm on a lever which of the following happens to effort force? A. Force will decrease B. Force will increase C. Force will vary D. Force will remain the same.

The removal, installation, and repair of landing gear tires by the holder of a private pilot certificate on an aircraft owned or operated is considered to be

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?