1. Gold has a specific heat of 0.129 J/g.C. If 1377 kJ is needed to increase the temperature of a sample of gold by 99.9C, what is the mass of gold in lbs (pounds)? 2. Deadlifting involves raising a loaded barbell from the floor to a position above the head with outstretched arms. Determine the work (in Joules) done by an athlete in deadlifting 300 kg to a height of 3 ft above the ground. 3. A bicycle has a kinetic energy of 110 J. What kinetic energy would the bicycle have if it had... a. ... twice the mass and was moving at the same speed? b. ... the same mass and moving with twice the speed? c. ... one-half the mass and was moving twice the speed? d. ... the same mass and moving one-half the speed? e....thrice the mass and moving one-half the speed?