The comparison of work output to work input is called the mechanical. advantage ... a. true. b. false

A moving sidewalk has a velocity of 1.7m/s north. if a man walks 1.1m/s, how long does it take him to travel 15m north in relation to a stationary observer? a. 15.9s b. 13.6s c. 14.8s d. 25.0s

What is the average speed of the swimmer between the times t=0 st=0/text{ s} t=0 s t, equals, 0, start text, space, s, end text and t=8 st=8/text{ s} t=8 s t, equals, 8, start text, space, s, end text?

One characteristic of a lagoon is often

Which statements best describe magnets? Check all that apply. 1. Magnets act at a distance 2. Magnets have two poles 3. All materials are attracted to a magnet 4. Magnets have a magnetic field around them 5.

The loudness of a sound wave is affected by the wave's A. pitch B. frequency C. amplitude D. wavelength

What is the resistance of a clock if it has a current of 0.30 a and runs on a 9.0-v battery? 0.033 2.7 9.3 30

A child is sledding. He starts at the top of the hill with a velocity of zero, and 3 seconds later he is speeding down the hill at 12 meters per second. What is the child's acceleration?

An accelerating voltage

A speck of dust on a spinning dvd has a centripetal accelera - tion of 20 m/s2. a. what is the acceleration of a different speck of dust that is twice as far from the center of the disk? b.

An object travels 8 meters in the first second of travel, 8 meters again during the second second of travel, and 8 meters again during the third second. Its acceleration is A. 0 m/s^2 B. 8 m/s^2 C. 16 m/s^2 D. 32 m/s^2