Meg runs a 10-km race in 45 minutes (0.75 hours). what was her speed in kilometers per hour? a. 7.5 km/hr b. 4.5 km/hr c. 13 km/hr d. 22 km/hr

What is the shape of the graph for motion with constant, nonzero acceleration, the position-versus-time graph

When the end of earth's axis is tilted toward the sun, what season will we exprience in north america?

You see a "no u-turn" sign at the intersection. may you make a u-turn at the intersection if the traffic signals are operating?

When an organism dies, the ratio of carbon-12 to carbon-14 in its body is the same as in every other living thing. However, the amount of carbon-14 is reduced by half every 5,700 years, while the amount of carbon-12 remains constant.

How does speed relate to motion energy?

The four terrestrial planets that have solid, rocky surfaces are A. Mars, Venus, Earth, and Jupiter. B. Mercury, Venus, Jupiter, and Mars. C. Mercury, Jupiter, Saturn, and Mars. D. Mercury, Venus, Earth, and Mars.

A book rests on a table, exerting a downward force on the table. the reaction to this force is:

Steve hears a siren emitting a frequency of 10 kHz when it is at rest. What frequency will Steve hear if the siren moves toward him at 30 m/s? Assume the speed of sound is 340 m/s. Answer options are: a. 11 kHz b. 10 kHz c. 0 kHz d. 9 kHz

What is the efficiency of a machine that has work input of 40 joules and work output of 35 joules

What happens to an object if the forces acting on it are unbalanced?