Which has a greater mechanical advantage. a doorknob or screwdriver?

What is a calorimeter used to measure? heat exchange due to energy flow energy exchange due to heat flow absolute temperature within a system temperature change within a system

A ball of clay with a mass of 1.93kg hits the floor and comes to a stop. Just before it hit the floor, its velocity was - 15.31m/s. If the collision took 0.33s, how much force did the floor exert on the ball of clay?

When does the growing brain begin to resemble the adult brain?

A sound wave with amplitude xo is measured by an observer to have an intensity of I0 when the observer is standing 4.0 meters from the source.

If 1.00 km^3 of air has a mass of 1.2x10^9 kg what is the density of air in g/cm^3

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