A vibrating object produces periodic waves with a wavelength of 53 cm and a frequency of 15 Hz. How fast do these waves move away from the object?

Identify the arrows that show the correct direction of heat transfer. 66°f 112°f 98°f

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air