Your boss asks you to compare two sound waves and determine which has a higher frequency. wave a has a period o 4/100 second and wave b has a period of 1/7 second. what would you tell your boss?
a. wave a has the higher frequency. it's frequency is 4 hz
b. wave a has the higher frequency. it's frequency is 25 hz
c. wave b has the higher frequency. it's frequency is 42 hz
d. wave b has the higher frequency. it's frequency is 7 hz

The specific heat of silver is 0.057 calories/gram°c. if 10.0 grams of silver were heated and the temperature of the sample changed by 20.0°c, how many calories of heat energy were absorbed by the sample?

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.