An electrical motor provides 0.50W of mechanical power. How much time will it take motor to lift a 0.1 kg mass at constant speed form to a shelf 2.0 m above the floor?

a. 0.25s

b. 0.40s

c. 1.0s

d. 4.0s

A dairy farmer notices that a circular water trough near the barn has become rusty and now has a hole near the base. The hole is 0.38 m below the level of the water that is in the tank.

Which of the following statements describes a way that simple machines make work easier? reduce the amount of energy needed to perform a task change the direction of the input force reduce the size of the input force needed to perform a task

What changes would result in a decrease in the gravitational force between two objects? Check all that apply.

All atomic nuclei except those of ordinary hydrogen contain neutrons true or false

What are three examples of constructive forces

List the different types of electromagnetic readiation (waves) in order from shortest wavelength to longest wavelength

Which way does the Coriolis effect deflect objects in the Northern Hemisphere To the south To the right To the left To the north

Let T be a linear transformation from a vector space V with dimension 11 onto a vector space W with dimension 7. What is the dimension of the nullspace of T?

What is the fundamental unit for measuring mass in the metric system?

Why are some craters on the moon bigger than others