1. if the work done to move a box to a distance of 6 metres equals 120 joules. calculate the force 2. Calculate the potential energy of a book with a mass of 1.5 kg placed on top of a shelf with a height of 2 m.
(Knowing that the acceleration due to gravity = 10 m/s2
).

3. What is meant by?
The potential energy of an object = 20 joules.

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

Which of the following are molecules? a. al b. ag c. mgcl2 d. nacl e. c3h8