A 30.0 kg object rests on a flat, frictionless surface. A rope lifts up on the object with a force of 309 N. What is the acceleration of the object?

A novice scuba diver practicing in a swimming pool takes enough air from his tank to fully expand his lungs before abandoning the tank at depth L and swimming to the surface. He ignores instructions and fails to exhale during his ascent.

A small metal block (shaded block) is released from rest at the level of the top dashed line. It either falls or slides on a frictionless incline to the level of the bottom dashed line (dotted block).

Which of the following natural factors is likely to support the formation of an oceanic island? Erosion of undersea stalagmites and stalactites Erosion of the face of a cliff by waves Rising of magma from the seafloor Rising sea level in low-lying

The amount of kinetic energy a moving object has depends on its mass and ... ?

You are listening to music in your room and you are asked to turn down the volume of your music. When you turn down the volume what will happen to the sound waves' amplitude?

What is efficiencywhat is the formula of mechanical advantage and velocity ratio of labour

What is the wavelength of an ekectromagnetic wave that has a frequency of 40,000 hz? the speed of light is 3x10^8 m/s?

Witch of the following is an example of a pull

Can two like charges attract each other

By applying a force of 50N, a pulley system can lift a box with a mass of 20 kg. What is the mechanical advantage of the pulley system?