An automobile engine is 15 percent efficient. How many joules of input work are required to produce 15,000 joules of output work to move the car?

True or False? each SI unit is 10 times smaller than the next smallest unit.

An atom of calcium-48 and an atom of calcium-47 differ in A) atomic number. B) nuclear charge. C) number of neutrons. D) number of electron

A 5.0 kg block with a speed of 2.8 m/s collides with a 10 kg block that has a speed of 1.8 m/s in the same direction. After the collision, the 10 kg block is observed to be traveling in the original direction with a speed of 2.3 m/s.

An alpha particle (q = + 2e, m = 4.00 u) travels in a circular path of radius 6.56 cm in a uniform magnetic field with B = 1.70 T.

Is there a benefit to cooking in a regular oven compared to a convection oven? Why?

Which interaction of nature is weakest? a. strong c. electromagnetic b. weak d. gravitational

Two workers pull horizontally on a heavy box but one pulls twice as hard as the other. The larger pull is directed at 25.0 west of north and the resultant of these pulls is 430.0N directly northward.

What would happen to an object in orbit without gravity pulling down?

The waters of a lake will be most layered in which season A. winter B. spring C. summer D. fall

Which of the following is an example of an archery contestant showing good precision but poor accuracy? O A. Hitting a bulls-eye once and then missing a second time O B. Hitting a bulls-eye every time O C.