A boy pushes on a box of mass 39 kg and it moves at an acceleration of 7.8m/s2. With what force does the boy push on the box?

A system is a group of parts that can be considered one unit. Storm systems, ecosystems, and our bodies are natural systems. Cars and houses are human-made systems. Choose an example of a system, and analyze the energy flow through the system.

A 18.6 m long steel beam is accidentally dropped by a construction crane from a height of 8.78 m. The horizontal component of the Earth's magnetic field over the region is 12.7 µT. The acceleration of gravity is 9.8 m/s 2.

Aleksei's family purchased a new water heater that is a heat pump. After installation, Aleksei noticed that the room containing the new water heater felt cooler than the rest of the house.

Matter is needed to transfer thermal energy by A. Conduction B. Convection C. Radiation D. Both A & B.

When the wires are connected to the terminals of the battery, what causes electric current in the circuit?

The law of reflection states that if the angle of incidence is 81 degrees, the angle of reflection is ___ degrees.

Do you mind if I use this example for my assignment?

A squirrel runs along an overhead telephone wire that stretches from the top of one pole to the next. It is initially at position xi=3.37 mxi=3.37 m, as measured from the center of the wire segment. It then undergoes a displacement of Δx=-6.

Imagine a 10 kg block moving with a velocity of 20 m/s to the left. calculate the kinetic energy of this block

Which do you think is the bigger problem among college students-the continued abuse of illegal drugs or the rising abuse of prescription and over-the-counter medications?