If a system requires 150 j of input work and produces 123 J of output work, whats its effiency

A phone cord is 6.48 m long. The cord has a mass of 0.253 kg. A transverse wave pulse is produced by plucking one end of the taut cord. The pulse makes four trips down and back along the cord in 0.877 s. What is the tension in the cord

What item would reflect rather than refract light? Magnifying glass Mirror Prism Lens

Which statement best compares potential and kinetic energy

Amy uses 20n of force to push a lawn mower 10 meters. How much work does she do

When a fork is placed in a hot piece of lasagna, thermal energy is transferred up the fork by

Tsunami waves have? 1. no crests 2. no troughs 3. long wavelengths 4. short wavelengths

The distance between a charge and the source of an electric field changes from 3 mm to 6 mm. As a result of the change, the electric potential energy of the charge is A. divided by 6 B. divided by 2 C. multiplied by 2 D. multiplied by 6

if an object is at rest and experiences a force of 100 to the right and 50N to the left which way will the object accelerate?

Determine the kinetic energy of 1000-kg roller coaster car that is moving with speed of 20.0m/s

Is uranium elemant or compound