Describe what happens when a muscle contracts.

A box is lifted at a constant speed of 7.0 m/s by a machine. If the power of the machine is 21000 W, then the force applied is equal.

A scientific theory is what?

What two temperature scales are commonly used in the United States

When a capacitor, battery, and resistor are connected in series, does the resistor affect the maximum charge stored on the capacitor? Why or why not? What purpose does the resistor serve?

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.

When you see a straw in a glass of water it looks bent why is this?

Compare the energy and wavelength of a microwave to the energy of a gamma ray.

T/F all compounds are molecules but NOT all molecules are compounds.

particle is projected from the surface of the planet Krypton with a speed equal to 3.6 times the escape speed from that planet's surface.

Does the box contain positive charge, negative charge, or no charge? Does the box contain positive charge, negative charge, or no charge?