Suppose we have a power cycle that requires 6,045 kJ to produce a net useful work of 5,619 kJ, determine the thermal efficiency of the cycle.

What is the length x of the side of the triangle below? (hint: use the cosine function)

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

What are some properties of transverse waves?