A 6,600 kg train car moving at + 2.0 m/s bumps into and locks together with one of mass 5,400 kg moving at - 3.0 m/s.

What is their final velocity?

A.) - 1.0 m/s

B.) + 2.5 m/s

C.) - 0.25 m/s

D.) + 0.50 m/s

Do all rocks stay the same throughout their life time

If you walk at a speed of 3 meters per second, how far will you walk in 11 seconds?

Sheila did 110 J of work to move a chair 2 m to the right. How much force did Sheila use to Sheila use to move the chair

To make 100 minus charges neutral you need

Science fiction movies depict astronauts landing on large asteroids. The gravitational force of such bodies is typically less that 0.1 N/kg. Given an astronaut with a mass of 77.3 kilograms: (a) What would his weight be on Earth (g = 9.

When distances were carefully measured from Earth to globular clusters above and below the Milky Way plane (where our view of them is not obscured by interstellar dust and gas), their distribution was found to be

Imagine you transfer heat into a gas. This heat splits up in two different ways: Additional thermal energy making the gas hotter and "fuel" for the gas to do work. Let's suppose, 64% of the transferred heat transforms into thermal energy.

How much heat is absorbed by a 61g iron skillet when its temperature rises from 5oC to 29oC?

Explain the relationship between motion and frame of reference.

Two students are looking at a brightly lit full Moon, illuminated by the reflected light from the Sun. Consider thefollowing discussion between the two students about what the spectrum of moonlight would look like.