True or false. The light bulbs in an office building give off tremendous amounts of heat. Since heat is a form of energy, this heat could be trapped and used to offset our need for electricity, thus saving energy and money.

If you wanted the pitch of a horn to drop relative to an observer, which way would you move the horn, relative to where that observer is located? A. Leave it in the same place and play the horn more softly B. Away from the observer C.

A golf ball and an equal-mass bean bag are dropped from the same height and hit the ground. The bean bag stays on the ground while the golf ball rebounds. Which experiences the greater impulse from the ground? a. The golf ball. b.

Wave is a disturbance in matter that transfers energy through the matter.

Which sound has 1000 times more energy than the sound of a dishwasher? a. chain saw (100 dB) b. jackhammer (130 dB) c. a lawnmower (90 dB) d. tornado siren (140 dB)

A copper block rests 38.9 cm from the center of a steel turntable. The coefficient of static friction between the block and the surface is 0.40. The turntable starts from rest and rotates with a constant angular acceleration of 0.60 rad/s2.

During which period did the first large herbivores and carnivores appear?

What is the reason behind the tail of a comet moving away from the Sun? A The gravity of Jupiter pulls it away from the Sun. The nucleus of the comet propels it away from the Sun. C. The radiation pressure and solar wind propels it away from the Sun.

Calculate the energy released as heat when 51.60 g Cu 2 O (s) undergo oxidation at constant pressure.

During summer vacation, Juan traveled a total distance of 400 miles. His trip took 8 hours. What was the average speed during his trip?

Where Pabs is absolute pressurePg, is gauge pressure, and Patm is atmospheric pressure. For example, if your tire gauge reads 34 lb/incz (pounds per square inch), then the absolute pressure is ...