Which of the following statements is always true? a. An object attest has no forces acting on it
b. Unbalanced forces lead to a change in speed or
direction
c. Gravity always leads to an unbalanced force
d. The net force on a moving object can never be zero

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

The charge on a charged sphere is: a)concentrated at its centerb)distributed uniformly throughout its volumec)clustered on its centerd)distributed uniformly over its surface

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.