A clear echo is heard within 0.2 seconds when a person shouts by sitting at the ridge of a hill. Calculate the velocity of sound in air. The distance between the person and the hill is 33.2 m

The nervous system produces a response in your body in about 10 seconds. O A. True OB. False

How much work did the movers do (horizontally) pushing a 41.0-kgkg crate 10.6 mm across a rough floor without acceleration, if the effective coefficient of friction was 0.60?

To travel from australia to south africa which direction would you go

The primary coil of a transformer contains 100 turns; the secondary has 200 turns. the primary coil is connected to a size-aa battery that supplies a constant voltage of 1.5 volts. what voltage would be measured across the secondary coil?

An 85 kg man pushes a 32,000 ton wall for 240 seconds, but it does not move. How much work does he do on the wall?

The mass of a newborn baby is 4.2 kilograms what is the baby's weight? (The acceleration due to gravity is 9.8 m/s2)

What holds the atoms together in a covalent bond

The sun is the centermost star of our solar system. a. True b. False

When an electron moves from a lower to a higher energy level

Which of the following is all matter made of? A. Hot particles B. Cold particles C. Constantly moving particles D. Nonmoving particles