Two bumper cars move in a straight line with the following equations of motion: x1 = - 4.0 m + (1.1 m/s) t x2 = 8.8 m + (-2.9 m/s) t what time do they collide?

What characteristics of the medium determine the speed of sound? How would raising the pitch of a singing voice affect the speed with which the song is carried through the room?

Which of the following does not affect electrical resistance? A) Color B) thickness C) length D) temperature

Roland writes a story in which boaters become stranded on a sandy island. In the story, they set about collecting materials to create semiconductors to repair computer components in their radio.

Why can"t you exert greater force on the pedals of a bicycle if you pill up the handle bars?

The deliberate radiation of electromagnetic (EM) energy to degrade or neutralize the radio frequency long-haul supervisory control and data acquisition (SCADA) communications links, best explains what?

Oil flows upward in the wick of a lantern because of the liquid property called A. meniscusity. B. capillarity. C. density. D. viscosity.

A high-mass star has more "fuel" than a low-mass star. which lives longer? why?

Suppose that, while lying on a beach near the equator of a far-off planet watching the sun set over a calm ocean, you start a stopwatch just as the top of the sun disappears. you then stand, elevating your eyes by a height h = 1.

Suppose you want to know if the color of peoples hair affects how warm it can keep their heads. describe the skills you would use to conduct an experiment to test your inquiry

The mass is increased by a factor of four. What is true about the period? Choose the best answer. The period remains unchanged. The period increases by a factor of four. The period is halved. The period doubles.