When a 50 g sample of an unknown metal is heated from 35.0°C to 50.0°C, it absorbs 345J of energy.
Part a) Calculate the specific heat capacity of the unknown metal. Show all of your
work. You can type your work or include a picture as an attachment.
Part b) Use the table below to determine the identity of the unknown metal.
Substance
: iron 0.46
Copper 0.39
Gold 0.13
Nickel 0.50

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j