A physics student wants to throw a snack to their friend. The student is on the ground while their friend is on the second floor of their house. The student throws the snack vertically
upward with a velocity of 13.4 m/s upwards so that it reaches its peak height right at their
friend's window. Calculate the height from the point where the student threw the snack to the
second floor window.
Round your answer to the nearest tenth.

A75-hp (shaft output) motor that has an efficiency of 91.0 percent is worn out and is to be replaced by a high-efficiency motor that has an efficiency of 95.4 percent. the motor operates 4368 hours a year at a load factor of 0.75. taking the cost of electricity to be $0.12/kwh, determine the amount of energy and money saved as a result of installing the high-efficiency motor instead of the standard motor. also, determine the simple payback period if the pu