A pulley system used to lift car tires has a mechanical advantage of 8.1. If

you pull on the pulley with a force of 540 N, how much force does the pulley

exert on the tire?

The enthalpy of fusion of ice is 330,000 J/kg. If I have a 1 kg sample, how much energy is needed to melt all of it? A. 33,000 J B. 3,300 J C. 330,000 J D. 330 J

The mass of an electron is ... A. equal to the mass of the proton and the neutron B. not significant to the overall mass of the atom C. higher than the mass of the proton or the neutron

The amplitude of an oscillator decreases to 36.7% of its initial value in 29.5 s. part a what is the value of the time constant

When you heat water, more sugar can be dissolved in it. true or false?

A thermometer is placed in water in order to measure the water's temperature. what would cause the liquid in the thermometer to rise?

During combustion, a fuel's electromagnetic energy is converted into thermal energy.

Explain why glucose is important to a cell

4. How far does a car travel in 90 seconds if it is traveling at a speed of 55 m/s?

Total energy input is 1400 and my efficiency is 80% so what is the useful energy output in jules?

What is the force of gravity acting on a 2000-kg spacecraft when it orbits two Earth radii from the Earth's center (that is a distance r=6380 km above the Earth's Surface. The mass of the Earth is 5.98 x 1024 kg.