Big commercial airplanes are sometimes pushed to an area by a tractor. A 1800-kg tractor exerts a force of 1.75x 104 N backward on the pavement, and the system experiences forces resisting motion that total 2400 N. Calculate the force exerted by the tractor on the airplane, assuming 2200 N of the friction is experienced by the airplane and the acceleration is 0.15 m/s2.

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.

What are some properties of transverse waves?

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.