A car traveling at a speed of 30 m/s comes to a stoplight. How much time will it take for the car to stop if its acceleration is -4.0 m/s2? A) 0.75 sec

B) 1.3 sec

C) 7.5 sec

D) -7.5 sec

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.