Which scientist discovered the two radioactive elements radium and polonium?

Tech A says the final drive assembly always has a gear ratio of 1:1. Tech B says the final drive assembly provides further gear reduction between the transmission and the drive wheels. Who is correct?

Which fact about the moon, as seen from the earth, is evidence that the amount of time the Moon takes to complete one rotation and one revolution are nearly identical? a. We usually see the Moon at night. b. We cannot see the Moon on some nights. c.

Sergei tees off on a stationary hockey puck using his most powerful slap shot. If he can exert a force of 250 N on the 500 gram puck for a time of 0.

What is the average velocity of a dancer who moves 5m toward the left of the stage over the corse of 15s?

What happens to the energy "lost" by a machine? a. it is recycled by the machine b. energy is never lost by machines c. it goes into the environment

A car accelerates from 30 m/s to 50 m/s in 2 seconds. Calculate the cars acceleration

What color of light has the shortest wavelength

What was his average swimming speed during the second half of the race if he tied the record, which was at an average speed of 2.05 m/s?

Objects A and B have equal amounts volumes and are both traveling at 25 miles per hour. Object A is much denser than Object B. Which object has a greater amount of force and why

An airplane with a total mass of 850 kg has an engine malfunction, causing it to provide a constant horizontal force of 4000 N. The pilot, who has a mass of 80 kg, decides to eject from the airplane.