Sound waves travel faster through air than through solids.

a. True

b. False

What is the meaning of the gravity?

Which rock would have the fastest rate of weathering in a warm, wet climate? limestone quartz-cemented sandstone granite gneiss

How are the electric field lines around a positive charge affected when a second positive charge is near it? A. The field lines combine with the lines around the second positive charge. B.

Electromagnets can be used to lock doors. How could an engineer increase the strength of an electromagnetic lock? Check all that apply A. by increasing the current through the wire B. by reversing the current through the electromagnet C.

How many electrons must be transferred to a body to produce a charge of 125 nc?

A football travels 25 m in 2.5 seconds. What is the speed of the football?

A 25 kg ball is thrown into the air when thrown it's going 10 m/s calculate how high it travels

As part of a circus performance, a man is attempting to throw a dart into an apple which is dropped from an overhead platform. Upon release of the apple, the man has a reflex delay of 215 milliseconds before throwing the dart.

A train travels 90 kilometers in 1 hour, and then 82 kilometers in 5 hours. What is it's average speed?

3. A hydraulic lift is used to jack a 950-kg car 45 cm off the floor. The diameter of the output piston is 23 cm, and the input force is 375 N. a. What is the area of the input piston? (10pts) b.