A block of iron of volume 50 cm has a mass of 390 g. what is the density of iron

A piece of hot copper of mass 4.00 kg has it's temperature decrease by 36.90 ºC when it is placed in a body of water of unknown mass. The temperature of the water is raised by 9.20 ºC.

What is the acceleration of a car that maintains a constant velocity of 100 km/h for 10 sec?

When do cells use oxygen to release energy

Generators need a source of energy to produce electricity. Which form of energy is a nonrenewable source of energy? hydro (water) energy geothermal energy fossil fuel wind energy

For which function is a heat engine most likely used? starting an air conditioner running a car igniting a furnace activating a thermostated?

What produces an electromagnetic wave? A) An oscillating or accelerating electric charge B) An electric charge moving at constant velocity C) A static electric charge D) A magnetic monopole moving at constant velocity

A physics book has a height of 25.8 cm, a width of 20.2 cm, and a thickness of 2.90 cm. (a) What is the density of the physics book if it weighs 20 N? kg/m³ (b) Find the pressure that the physics book exerts on a desktop when the book lies face up.

A 24 volt battery is connected to a 3Ω resistor and a 5Ω resistor in series. What is the current in the circuit?

Two technicians are discussing a problem where the brake pedal travels too far before the vehicle starts to slow. Technician A says that the brakes may be out of adjustment.

What are three types of muscle fibers? A.) smooth, intermediate-twitch, cardiac B.) slow twitch, intermediate twitch, fast twitch C.) smooth, cardiac, skeletal D.) slow twitch, fast twitch, involuntary