A freight train rolls along a track with considerable momentum. If it rolls at the same speed but hastwice as much mass, its momentum isa. zero. b. doubled. c. quadrupled. d. unchanged.

The tension t at each end of the chain has magnitude 25 n. what is the mass of the chain? (use g = 9.8 m/s2 for the acceleration due to gravity. give your answer correct to at least two decimal places.)

A driver in a car is traveling at the speed of 198 km/h sees a cat on the road. how long will it take for the car to accelerate to a stop inexactly 299 '

The public is not yet able to purchase hydrogen fuel cell powered cars because engineers have to determine how the cars perform A. On racecar tracks B. In real-world conditions C. In flooded environments D. On closed courses

Which physical property explains the difference in ability of copper and rubber to transmit electricity?

3. How can we determine the volume of a regular object?

Measurements of how orbital speeds depend on distance from the center of our galaxy tell us that stars in the outskirts of the galaxy. True or False

Identify what is required to calculate the atomic number and atomic mass of an element

What device is used to measure the current in a circuit

A lever allows a 35 N load to be lifted with a force of 7 N. What is the mechanical advantage of the lever?

An object moves from the position + 16m to the position + 43m in 12s. What us the total displacement