(50kg)(4m/s)+(75kg)(-1m/s)=Pfinal What is the answer

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

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.

If the area of a square has increased by a factor of 16, by how much has each side increased?