It takes 3.2 x 10^3 J of heat to melt an amount of gold (Hf = 6.30 x 10^4 J/kg). how much gold do you have?

How much of the electromagnetic spectrum is visible to us?

What type of energy is present in a barbell being lifted or a shot-put being thrown? a. mechanical energy b. thermal energy c. chemical energy d. electrical energy.

Distinguish between an elastic and an inelastic collision.

Why a rural area might be a safer place to experience an earthquake than a large city?

A skier descends a mountain at an angle of 35.0º to the horizontal. If the mountain is 235 m long, what are the horizontal and vertical components of the skier's displacement? (Use trigonometry to solve.) x = y =.

A gate in an irrigation canal is constructed in the form of a trapezoid 2 m wide at the bottom, 38 m wide at the top, and 2 m high. It is placed vertically in the canal so that the water just covers the gate.

A machine with a mechanical advantage of 10 is used to produce an output force of 250 newtons. What input force is applied to this machine

Why do you float in space

How does physical change affect the identity of a substance

A scientist pours grape juice on three identical white shirts He then uses three different cleaning products on the shirts and measures how clean they get what is the independent variable in this experiment