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

Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.

Asystem containing an ideal gas at a constant pressure of 1.22×10^5 pa gains 2140 j of heat. during the process, the internal energy of the system increases by 2320 j. what is the change in volume of the gas?

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?