5000 j of heat are added to a system. it does 3500 j of work on the surroundings. what is δe in j?

What are the signs of the angular velocity ω and angular acceleration α of the pulley in case (a) ? by convention, clockwise rotations are negative and counterclockwise rotations are positive?

What do the atomic masses in parentheses found in some elements' squares on the periodic table indicate?

Add 1299 g and 45.1 kg and express your answer in milligrams (mg) to the correct number of significant figures. A) 4.64 x 10t mg B) 4.64 x 10s mg C) 4.64 x 10s mg D) 4.64 x 10' mg

How will the capacitance change if we increase the distance in between the two plates?

Is an electron an antiparticle, boson, lepton, or hadron?

Sodium, atomic number 11, forms an ionic bond with an atom of an unknown element. What is one possible choice for the ther element in the compound?

A ship leaves the island of Guam and sails a distance 255 km at an angle 49.0 o north of west. Part A: In which direction must it now head so that its resultant displacement will be 125 km directly east of Guam?

What is the molecular geometry of a methane (CH4) molecule?

Why do scientist use radioactive decay to figure out how old stuff is

The power of a machine measures A. its rate of doing work. B. its strength. C. the force it produces. D. the work it does.