If timmy is traveling 20 miles per hour south for 2 hours. How far is he displaced

A train approaches a railroad crossing, blowing its whistle the entire time. When does an observer at the crossing hear the lowest frequency of the train's whistle?

Jenny, an average teenager, writes in her diary: "No one understands how hard my life is and how confused I get. Why is this happening to me? Why am I so different?" A developmental psychologist would probably say that Jenny is expressing A.

Which of the following is a responsibility of citizens? a. home ownership c. educational participation b. jury duty d. getting a driver license

The amount of air pressure on your body is equivalent to the weight of: a. Your body c. 4 loaves of bread b. Two elephants d. 17 cats

Listed following are three possible models for the long-term expansion (and possible contraction) of the universe in the absence of dark energy: A) recollapsing universe B) coasting universe C) critical universe Rank each model from left to right

Which statement describes how light behaves when it strikes a translucent material? A. Light is scattered. B. Light is transmitted. C. Light is reflected. D. Light is absorbed.

A certain gas is present in a 15.0 l cylinder at 2.0 atm pressure. if the pressure is increased to 4.0 atm the volume of the gas decreases to 7.5 l.

Choose all the answers that apply. To qualify as a planet, a celestial object must: have an irregular shape revolve around the sun orbit in a clear area have enough gravity to have a spherical shape have a satellite

Oxygen makes up the largest part of living cells at 65%. What is the percentage of the second-most abundant element in living cells?

Acceleration is defined as the rate of change for which of the following? A. time B. velocity C. position D. displacement