Student is tuning his guitar. He stretches the string by 10 mm so it produces the right note when played. The string has a spring constant of 20 N/m.
Calculate the energy stored in the elastic potential energy store of the string as it is stretched.
You can assume that the limit of proportionality was not exceeded whilst it was being stretched.

What must be the same for any two resistors that are connected in series ? a. the potntial diffrence across each b. the rate at which charge moves through each c. the rate at which energy is used by each d. the resistance to the flow of charge of each

Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)

Can you match these to the correct definition