The velocity of Desmond's car changes from 20 meters/second to 10 meters/second. The change happens in 5 seconds. What's the acceleration of the car?

a. 4 m/s2

b. 2 m/s2

c. - 2 m/s2

d. - 4 m/s2

Two simple pendulum of slightly different length, are set off oscillating in step is a time of 20s has elasped, during which time the longer pendulum has completed exactly 10 oscillations. Find the length of each pendulum.

It takes 86 joules of energy to raise a box 2 meters using the pulley setup shown above. Without the pulley, the box can be raised 2 meters using only 82 joules of energy. What could explain this 4-joule difference?

Explain why a Chef in a very busy restaurant would prefer a copper pot over an aluminum pot. A) The copper pot would heat faster because it has a lower specific heat value.

Why do you think it is difficult to use carbon-14 to determine the age of extremely old objects (over 50,000 years) ?

A truck on a straight road starts from rest, accelerating at 2.00 m/s2 until it reaches a speed of 28.0 m/s. Then the truck travels for 46.0 s at constant speed until the brakes are applied, stopping the truck in a uniform manner in an additional 5.

Why is the use of an international system of measurement important for science?

Would u do more lifting putting a box on the table or putting it on a shelf

Tia needs to produce a solenoid that has an inductance of 2.51 μ H. She constructs the solenoid by uniformly winding 1.19 m of thin wire around a tube. How long, in centimeters, should the tube be?

A 1,492.3-kg airplane travels down the runway. Each of its four engines provides a force of 1,447.5 N. Find the acceleration of the airplane, in m/s2. (Ignore friction.)

A 0.42 kg football is thrown with a velocity of 17 m/s to the right. A stationary receiver catches the ball and brings it to rest in 0.017 S. What is the force exerted on the receiver? Answer in units of N