1. If a 250 kg rock is sitting on the ledge of a cliff 295 meters high, then what is the potential energy of the rock?
2. A 275 kg rock is rolling faster and faster down the side of a mountain. At the bottom
of the mountain the rock has an instantaneous velocity of 3 m/s, at this moment what is
the kinetic energy of the rock?
3. A race car with a mass of 500 kg on a bridge 45 m above a river, what is the
potential energy of the car?
4. A race car with a mass of 500 kg is driving with an instantaneous velocity of 2.8 m/s,
what is the kinetic energy of the car?
5. Two blocks of wood with a mass of 0.02 kg are hanging 0.9 m above the floor, what
is the potential energy of the blocks of wood?
Mi

i think its 100

i hope this !

answer : (a) volume of the gas = 8.67 ×   l

                (b) second virial coefficient b = -1.21226 l/mole

solution :   given,     t = 300k

                                p = 20atm

                                z = 0.86

                                n = 8.2 mmoles = 8.2 × moles

                                r =   0.082 l atm/k/mol

        find,     (a) volume of gas   and (b) second virial coefficient b at 300k.

formula used :            

                          and            

(a)            

                    = \times 0.082\times 300}{20}[/tex]

                    = 8.67 ×   l

(b)      

                    = (0.00867-1) × 8.659

                    = - 8.5839 l/mole

i belive it is water