A person began running due east and covered 15 km in 2.0 hr. What is the average velocity of the person?

Show all your work!

If the sign of work is negative,

Which symbol in the first law of thermpdynamics represents energy that moves from a hot object to a cooler object?

In the diagram, q1 = + 0.250 mC, q2 = - 0.180 mC, and q3 = + 0.400 mC. the net force on q2 is zero. how far is q2 from q3? (make sure you know the direction of each force!) (hint: milli means 10^-3.) (unit = m)

Two asteroids of equal mass in the asteroid belt between mars and jupiter collide with a glancing blow. asteroid a, which was initially traveling at va1 = 40.0 m/s with respect to an inertial frame in which asteroid b was at rest, is deflected 30.

Why is there no sound in space?

You have arranged that the magnetic field in a particular region of space is due North with a value of 0.0040 T. An electron enters the field traveling to the West with a speed of 9.5 percent of the speed of light.

If the mass of each ball were the same, but the velocity of ball A were twice as much as ball B, what do you think would happen to the final velocity of each ball after the collision?

Solar cells convert what type of energy into electrical energy?

Which common gas is less abundant in the top of saturn's atmosphere, compared to what we observe at jupiter?

How many atoms are in NaHCO3