A copper bar of length h and electric resistance r slides with negligible friction on metal rails that have negligible electric resistance (see figure below. the rails are connected on the right with a wire of negligible electric resistance

Would you expect to find a high or low level of resistance in a copper wire and why?

A ball is tossed straight up with an initial velocity of 13.6 m/s. A) how high will it go? B) how long is the ball in the air?

When is acceleration positive, negative, and zero? Calculate the average speed if I walk to class at a speed of 20 meters/minute for the first 2 minutes and run when they start to play 21 savage at a rate of 50 meters/minute for the last 3 minutes.

A car travels 3 km in 2 min. What is the velocity of the car?

1. Which of the following is an accurate statement? A. Step-down voltage transformers have a different number of turns in the primary than in the secondary winding, so they change the incoming voltage to a higher voltage. B.

Which project involved the goal of orbiting a manned spacecraft around earth? A. Mercury B. Apollo C. Gemini D. Skylab

Which type of listening response includes the use of head nods, facial expressions, and short utterances such as "uh-huh" that signal your interest to the speaker?

During eccentric muscle contraction, the muscle

What is a string theory?

When a sound source is moving away from an observer, the observer will hear a lower pitch. This is due to