An 80 kg skydiver is falling at terminal velocity. What is the value of air resistance acting on his body? Consider, what are the knowns and unknowns?

A robot probe drops a camera off the rim of a 239 m high cliff on mars, where the free-fall acceleration is - 3.7 m/s2. a. find the velocity with which the camera hits the ground. b. find the time required for it to hit the ground.

How much work was required to move an object 3.0 meters if 75 joules of work were expanded

A researcher favors scientific work that states that his favorite type of exercise is the most beneficial and ignores work that says other types of exercise might be more beneficial.

Electric eels generate electric pulses along their skin that can stun an enemy. In a test, an electric eel generated pulse of 500 V that produced a current of 80 mA for 10ms. Assuming a steady current, what was the power of the pulse? A. 63 W B.

If the density of an object is 60 g/cm^3 and its mass is 20 grams, what is its volume in cm^3? A) 0.33 B) 3 C) 80 D) 1200

The formula for calculating power is work divided by time (power = work : time). What are two ways of stating the same relationship? work = power : time, work = power * time, time = work : power, time = work * power, power = work * time

What does newton's first law predict will happen to a person riding in a car that is moving in circular motion?

One of the main reasons steel is used more widely than iron is because it's lighter softer stronger than iron

What is the frequency of a wave with a velocity of 21.2 m/s and a wavelength of 8.3m?

Positive ions have blank protons than electrons