What effect does an unbalanced force have on an object?

A boy on the beach holds a spherical balloon filled with air. at 10:00am, the temperature on the beach is 20°c and the balloon has a diameter of 30 cm. two hours later, the balloon diameter is 30.5 cm.

Why do different substances produce electromagnetic waves when they are heated up or energized?

A vegatable garden is 12 meters long by 7 meters wide. It is home to 168 mice. What is the population density of the mice?

The most common type of flaming encountered by fire fighters is called:

How does the length of a rope string or fishing line affect the balance of a mobile kinetic sculpture?

As a skydiver falls, the air is forced to move around him. What energy transformation does this cause? A. Potential energy from the skydiver becomes potential energy in the atmosphere. B.

On your way to the dance through there is some slow driving person in front of you so you slam on the gas going 30 mi/hr to 60 mi/he. Luckily your date brought a stop watch and told you the whole thing took place in 10s.

The sources of the heat inside Earth

A microwave is rated at 750 watts. How long will it take the microwave to do 5700 J of work on a cup of water? Assume 100% efficiency. A) 0.13s B) 2s C) 7.6s D) 4,275,000 s

A block hangs at rest from the ceiling by a piece of rope. Consider the forces acting on the block. Is gravity present or absent?