Question 1 10 pts
Ed and Shari are driving down 7th Street with their trailer.
He drives 150 meters in 18 seconds. Assuming he does
not speed up or slow down, what is his speed?
Speed =
Unit

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.

The electric field direction is defined by the direction of the force felt by (select one of the following answers): 1. a negative charge. 2. a positive charge. 3. both positive and negative charges.