The inner planets are made almost entirely of rock and metal and form the group known as the terrestrial planets. The heavier rocky and metallic materials, in the gaseous state, condense at
than do substances such as hydrogen or methane.

Aparticle travels in a circular orbit of radius 21 m. its speed is changing at a rate of 23.1 m/s2 at an instant when its speed is 37.2 m/s. what is the magnitude of the acceleration (in m/s? ) of the particle?

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.