What does a simple pulley do?

A. It makes you have to pull harder on the rope.

B. It increases the force.

O O O O

C. It redirects the force.

D. It makes the load heavier.

A soccer ball kicked with a force of 13.4 N accelerates at 7.9 m/s2 to the right. What is the mass of the ball? Answer in units of kg.

A scientific law is A. the same as a hypothesis B. a description of natural events C. an explanation of a scientific observation D. the conclusion of a scientific experiment.?

A battery with an emf of 12 V and an internal resistance of 1 Ω is used to charge a battery with an emfof 10 V and an internal resistance of 1 Ω. The current in the circuit is : A) 2 A B) 1 A C) 4A D) 11A E) 22 A

Is bending iron nail physical property or chemical property?

Eric has just had a sandwich that contained the equivalent of 1.80 mol of glucose the standard molar entropy of reaction is 182 j k-1 mol-1.

Which best explains the relationship between the speed of sound and the medium through which it passes?

g The magnetic force on a charged particle A. depends on the sign of the charge on the particle. B. depends on the velocity of the particle. C. depends on the magnetic field at the particle's instantaneous position. D.

How fast must a 1000 kg car be moving to have a kinetic energy of 1.0 kWh

Which of the following is used to measure weight? Newtons Liters Kilograms Meters

Intravenous infusions are often made under gravity. At what height should the bottle be placed so the liquid pressure is 700 mm-H2O?