If the motor has an efficiency of ϵ = 0.6, determine the power that must be supplied to the motor when the elevator is hoisted upward at a constant speed of ve = 4 m/s.

Which of the following statements is a true statement about the use of nuclear energy as an alternative energy source? O A. Production of electricity from nuclear energy does not produce dangerous radioactive waste products. O B.

Is it true weather refers to the conditions of the atmosphere at a given time and place

What causes differences in air pressure around the Earth?

Vertically polarized light is to be passed through a sequence of three polarizing filters. The direction of the polarization axis for each filter is indicated by lines drawn parallel to the axis.

If an alpha particle and a beta particle have the same energy, which particle will penetrate farther into an object?

Explain the relationship between speed, velocity and acceleration

What are the characteristics of prokaryotes? A.) A prokaryote lacks a well-defined nucleus. B.) A prokaryote cannot perform basic life functions. C.) A prokaryote lacks cell organelles. D.) A prokaryote is larger than a eukaryote.

In a perfectly inelastic collision, the total momentum of the system ___ (i) ___ constant, while the total kinetic energy of the system___ (ii) ___constant.

What factors determine power

Superman, with a mass of 150kg, goes into outer space to push a 125000kg alien spaceship out of stationary orbit. He uses his super strength and pushes the ship away ay at speed of 150m/s. What is the speed of Superman after his big push