Astudent applies a force to a cart that experiences friction. the cart has a small acceleration. if the student doubles their applied force, explain how the motion changes. a. the motion will not change b. the acceleration of the cart will exactly double c. the acceleration of the cart will more than double d. the acceleration of the cart will increase but not exactly double

Could someone me find the answer to this problem.

Acid precipitation chemically weathering a 5.0-kg limestone rock . which coukd be the result ?

An air standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes. 1-2 isentropic compression 100 kpa and 22°c to 600 kpa 2-3 v=constant heat addition to 1500 k 3-4 isentropic expansion to 100 kpa 4-1 p=constant heat rejection to initial state (a) show the cycle on p-v and t-s s (b) calculate the net work output per unit mass (409 kj/kg) (c) determine the thermal efficiency (47.9%)