Two particles are separated by 0.38 m and have charges of 6.25 x 10 -9 C and 2.91 10 C. Use Coulombs law to predict the force between the particles if the distance is doubled. The equation for Coulombs law is and the constant, k, equals 9.00 x 10 Nm/C A-1.13x1076 N OB. 1.13x10-6 N OC. 2.83x 10-7N O D. 28310 107 N i

If this plastic cup is heated to its melting point, what will eventually happen to all the particles in the plastic? a. the particles will begin to move enough that they slide past each other. b. bonds will form and the liquid will become a solid. c. the spaces between the particles will get smaller. d. the particles will change state and become a crystalline solid.

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction