Two carts move in the same direction along a frictionless air track, each acted on by the same constant force for a time interval δt? cart 2 has twice the mass of cart 1, which one of the following statements is true? cart 2 has the greater change in momentum cart 1 has the greater change in momentum. the changes in momenta depend on the initial velocities. each cart has the same change in momentum.

Tons?

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

Ithink it is a. but i'm not 100 percent sure.

Iwould think it is temperature, silica, oxides (gases)