George walks to a friend's house. He walks 750 meters North then realizes he walked too far. He turns around and walks 250 meters south. The entire walk takes him 13 seconds. What is his speed per second?

What is the entropy change associated with the expansion of one mole of an ideal gas from an initial volume of v to a final volume of 5.50v at constant temperature?

What is true if mass is conserved in a reaction

What safety feature melts to protect a circuit?

Can a machine be more than 100% efficient? yes no impossible to determine

A book sitting on a shelf has gravitational potential energy. true or false

The slope of a velocity time graph over any interval of time gives the during that interval

if light travels in a vacuum at 3.00 x 10^8m/s and its frequency is 7.44 x 10^7 what is its wavelength

the half-life of carbon - 14 is 5730 years. What fraction of carbon-14 would remain after 11,460 years?

An object with a mass of 10.9 kg experiences a force of 18.53 N. What is the acceleration of the object? A. 2.2 m/s2 B. 1.7 m/s2 C. 16.83 m/s2 D. 1.3 m/s2

A proton, starting from rest, accelerates through a potential difference of 1.0 kV and then moves into a magnetic field of 0.040 T at a right angle to the field. What is the radius of the proton's resulting orbit