Why is the mechanical advantage of using a single pulley always 1? Assume there's no friction.

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

AbalI is thrown vertically up Ward with a velocity of 6m/s a, How long doesit takes for the balIt reach the maximum possible height

Plants provide energy to animals for their life processes by A) providing carbon dioxide. Eliminate B) serving as a food source. C) receiving energy from the sun. D) providing shelter from weather.

Material from which of the following solar occurrences can reach Earth, causing radio blackouts? A. Coronal mass ejection B. Prominence C. Solar wind D. Flare

What effect would decreasing the distance between objects have on their gravitational attraction to each other?

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?

What conditions are required for nuclear fusion that prevent it from being used to generate electric energy?