A car starts from rest and accelerates at a constant rate. After the car has gone 50 m it has a speed of 21 m/s. What is the acceleration of the car? A. 4.4 m/s2 B. 2.4 m/s2 C. 0.23 m/s2 D. 5.5 m/s2

The spreading of sound waves around openings in barriers is called

A rectangular wooden block measures 10.0cm x 4.00cm x 2.00cm. when the block is placed in water, it floats horizontally, with its bottom face 1.65cm below the surface. what is the density of the wood? show and explain your work.

Which of the following describes the measure of the flow of electrical charge? A. watts B. volts C. Ohms D. amperes

All forces result because of? between objects?

A suction cup works by creating a vacuum between the rubber cup and surface its stuck to. if the total area of the rubber cups is 0.

Which features involve compression? Select the three correct answers. A. Reverse faults B. Anticlines C. Folded mountains D. Normal faults E. Monoclines

You place a cup of 210 degrees F coffee on a table in a room that is 68 degrees F, and 10 minutes later, it is 200 degrees F. Approximately how long will it be before the coffee is 180 degrees F? Use Newton's law of cooling:

What change occurs to the mass of an object when an unbalanced force is applied to it? A. The mass increases. B. The mass decreases. C. The mass remains the same. D. The mass reduces to zero. E. The mass changes by an indeterminate amount.

The equilibrium price will rise, but equilibrium quantity may increase, decrease, or stay the same if a. demand increases and supply decreases. b. demand increases and supply increases. c. demand decreases and supply increases. d.

The nearest large galaxy to our own is about 2.5 million light-years away. how many meters is that