The second law of thermodynamics states that thermal energy can flow from colder objects to hotter objects ...

a. by convectionb. only if work is done on the systemc. spontaneously

d. when thermal expansion takes place

Why do stars fall down from the sky every time you walk by?

What type of electric current comes from a generating plant?

Consider a sphere and a cylinder of equal volume made of copper. Both the sphere and the cylinder are initially at the same temperature and are exposed to convection in the same environment. Which do you think will cool faster

Which is an example of speed?

An electric field exerts a force of 3.00 E - 4 N on a positive test charge of 7.20 E-4 C. The magnitude of the field at this location of the charge is a) 0.24 N/C b) 0.417 N/C c) 15.6 N/C d) 21.6 N/C e) 2.4 N/C

What happens when you shoot a bullet into the sky?

If you want to lift a 5-kg box to a height of 2 meters, how much work must be done? O A. 2J O B. 50 J O C. 98 J O D. 100

A diver initially moving horizontally with speed v dives dives offthe edge of a vertical cliff and lands in the water a distance dfrom the base of the cliff.

What is the Isotope notation for a Lithium atom?

Which best describes the direction of heat?