True or false A temperature change and a change of state can both occur at the same time as a substance gains or loses energy.

You exert a horizontal force on a heavy piano that rests on a carpeted floor. the piano doesn't budge. if the force you exert on the piano is the "action", what force is its reaction?

Without heat from the Sun, the water cycle would A) reverse. B) not work. C) slow down. D) not be affected.

A 0.6-m3 gas tank holds 5 moles of nitrogen gas (N2), at a temperature of 320 K. The atomic mass of nitrogen is 14 g/mol, the molecular radius is 3.0 * 10-10 m, and the Boltzmann constant is 1.38 * 10-23 J/K.

What will happen to a solid object made from matter with a greater density than water when it is dropped into water

A paper airplane is thrown westward at a rate of 6 m/s. The wind is blowing at 8 m/s toward the north. What is the actual velocity of the airplane?

Whay is moon non-lominous body

How many (whole number of) 91 kg people can safely occupy an elevator that can hold a maximum mass of exactly 1 metric ton? A metric ton is 1.000 * 103 kg. Answer in units of people.

Cho is using technological design to build a clock based on the apparent motion of the Sun. Which of the following would be the best measure of success for Cho's clock? A. Cho's clock works even at night. B.

Suppose that a car traveling to the west (-x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleration. a) The car is decelerating and its acceleration is positive.

What are the moons of the outer planets made of, and how is their composition different from that of our Moon?