Acceleration refers to

a. increasing speed

b. decreasing speed

c. changing direction

d. all of the above

Sound wave A delivers 2 J of energy in 2 s. Sound wave B delivers 10 J of energy in 5 s. Sound wave C delivers 2 mJ of energy in 1 ms. Rank in order, from largest to smallest, the sound powers of Pa, Pb, Pc of these three waves.

An archer defending a castle is on a 15.5 m high wall. He shoots an arrow straight down at 22.8 m/s. How much time does it take to reach the ground?

During his first golf tournament (at age 2). Tiger Woods actually had to four putt one of the holes. His putts were as follows: 10 meters SW, 3 meters N, 4 meters SE, and 0.5meters W. HOw far was the hole from his original putting position.

A square is cut out of a copper sheet. A circular hole is drilled in the square. The square is heateduniformly. As a result, the diameter of the hole increases decreases stays the same The answer depends on the size of the hole.

A puck slides along an icy surface. what makes it slow down?

A new cannon was being developed in a science lab. The instructor wanted to do some testing of the cannon's ability to launch objects with different masses. The instructor used tennis balls and filled them with lead, rocks, and styrofoam.

Which law is being demonstrated when a swimmer moves forward through the water?

A camcorder has a power rating of 16 watts. If the output voltage from its battery is 7 volts, what current does it use?

Electromagnetic waves with low frequencies have been used for long-distance underwater communication. These waves most likely belong to which of the following parts of the electromagnetic spectrum? A. gamma rays B. infrared waves C. radio waves D.

A bird sitting high in a tree is an example of an object with what type of energy