A uniform bridge span weighs 70 x 10^3 N and is 40 m long. An automobile weighing 15 x 10^3 N is parked with its center of gravity located 15 m from the right pier. What upward support force does the right pier provide?

Two objects are dropped from different heights at the same instant. If the first object takes 10.7 seconds to hit the ground and the second takes 14.8 seconds what was the difference in their original heights?

Which one of the following is NOT a simple machine? A. lever B. pulley C. hammer D. inclined plane

Overfishing-which threatens many deep-water fish species-is in some way a direct reaction to what phenomenon? a. the interdependence of countries and an increase in the world population b.

When a pair of balanced forces acts on an object, the net force that results is A. greater in size than both forces combined. B. equal to zero. C. greater in size than one of the forces. D. equal in size to one of the forces.

In a 4.0-kilometer race, a runner completes the first kilometer in 5.9 minutes, the second kilometer in 6.2 minutes, the third kilometer in 6.3 minutes, and the final kilometer in 6.0 minutes.

You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. Calculate the energy.

Three ideal polarizing filters are stacked, with the polarizing axis of the second and third filters at 21 degrees and 61 degrees, respectively, to that of the first. If unpolarized light is incident on the stack, the light has intensity 60.

What does an electric current produce

A series circuit contains three 2 Ω resistors and a 6 Ω resistor. The current in each resistor is 4.0 A. What is the voltage of the battery in the circuit? 2.0 V 3.0 V 32 V 48 V

A solid metal ball and a hollow plastic ball of the same external radius are released from rest in a large vacuum chamber. When each has fallen 1 m, they both have the same?