If the mass of the counterweight increases by adding more mass, how does the

force required to lift the counterweight change?

It takes a sound intensity of about 160 db to rupture the human eardrum. how close must the firecracker described in the introduction be to the ear to rupture the eardrum? express the distance drupture, in meters, to one decimal place.

An electric car has a battery that can hold 16 kwh of energy. if the battery is designed to operate at 340 v, how many coulombs of charge would need to leave the battery at 340 v and return at 0 v to equal the stored energy of the battery?

Without wires, electronic signals can be carried over long distances by a. transistors. b. magnetic fields. c. electromagnetic waves. d. integrated circuits.

Sea floor spreading worksheet

Which of the following is defined as displacement over change in time? A. Speed B. Acceleration C. Velocity D. Displacement

A 30.0-kg object experiences a drag force due to air resistance with a magnitude proportional to the square of its speed. The object falls with an acceleration of 4.00 m/s2 downward when it is falling downward at 70.0 m/s.

If a tank contains water 4 m deep, what is the pressure at the bottom of the tank? (Neglect the atmospheric pressure.)

Eli rolled a ball down the cement sidewalk as hard as he could. The ball rolled for less than a minute before it came to a stop. What force acted to slow and finally stop the ball? A.

Which of the following statements best explains why a book resting on a table is in equilibrium? a. The acceleration due to gravity is 9.8 m/s 2 for both the book and the table. b. There is a net force acting downward on the book. c.

About how long does it take for sound to travel 1 Km?