In a heat engine, if 700 j of heat enters the system, and the piston does 400 j of work, what is the final internal energy of the system if the initial energy is 1,200 j?

A 1,100 J

B 300 J

C 1,500 J

D 900 J

In the current model of the atom, electrons and protons are mixed together in a solid sphere electrons travel as waves in the electron cloud that surrounds the nucleus electrons orbit around the nucleus like planets orbit the sun electrons and

Projectile motion how long was the football up in the air

A long straight wire has fixed negative charge with a linear charge density of magnitude 4.6 nC/m. The wire is to be enclosed by a coaxial, thin-walled, nonconducting cylindrical shell of radius 2.2 cm.

When you ride your bike uphill, where does the energy you use come from

An electric current of 202.0 mA Transports 56.0 C of charge. Calculate the time this took.

A bicycle racer sprints near the end of a race to clinch a victory. The racer has an initial velocity of 12.1 m/s and accelerates at the rate of 0.350 m/s2 for 6.07 s. What is his final velocity?

The current in a wire increases from 5 A to 10 A, what happens to its magnetic field? The field is twice as strong the distance of a charged particle from a wire changes from 10 cm to 20 cm, what happens to its magnetic field?

At a constant pressure and a temperature of 280 K, the gas in a cylinder has a volume of 10.0 liters. If the volume of the gas is increased to 20.0 liters, what is the new temperature? 2800 K 28 K 140 K 560 K

what must be the distance between source of sound and mountain to give an echo in 5 seconds?, (speed of sound at 0°c=33m/sec

What is the speed of a 50 g rock if its de Broglie wavelength is 3.32 x 10?