A 3000 kg freight train traveling at a rate of 2 m/s strikes a stationery 3000 kg freight car and couples up. What is the speed of the 2 cars as they move together after the collision?

Which term describes the energy per unit charge in a circuit? A. Resistance B. Current C. Voltage D. Power

A nuclear reactor generates 1.0GW of power. About how much mass does it lose per day? a) 10^3 kg b) 10^9 kg c) 10^-8 kg d) 10^-3 kg

Two objects attract each other with a gravitational force of 25 newtons from a given distance. If the distance between the two objects is reduced by a factor of 5, what is the changed force of attraction between them? A. 5 newtons B. 50 newtons C.

What mass of a material with density Ï is required to make a hollow spherical shell having inner radius r1 and outer radius r2? (use any variable or symbol stated above as necessary.) ?

Break down of rock can be chemical or mechanical

Describe one example of competiton of tropical dry forest

What is the center of a tornado called A. the eye B. The center C. The middle road D. The vortex

Is it legal in Florida for a math teacher forces the kids to do push ups?

Acceleration is best defined as the rate of change of blank of an object

Zirconium has an atomic number of 40. How many neutrons are there in an isotope of zirconium-92?