if you have to apply 40 N of force on a crowbar to lift a rock that weighs 400 N, what is the actual mechanical advantage of the crowbar?

The magnetic field over a certain range is given by B~ = Bx ˆı + By ˆ, where Bx = 2 T and By = 4 T. An electron moves into the field with a velocity ~v = vx ˆı+vy ˆ +vz ˆk, where vx = 2 m/s, vy = 6 m/s and vz = 8 m/s.

Feces is usually about 40 percent water and 60 percent solid matter. Reducing the water content to 20 percent would most likely result in

The lower end of a long plastic straw is immersed below the surface of the water in a plastic cup. An average person sucking on the upper end of the straw can pull water into the straw to a vertical height of 1.

Numerical probles of science : The radius of a cricket ball is 3 cm. Calculate its area.

Pipe A is 0.50 m long and open at both ends. Pipe B is open at one end and closed at the other end. Determine the length of pipe B so that it has the same fundamental frequency as A ...

Why was the inclusion of sketches in his notes important to Galileo's studies

7. If your accelerator suddenly gets stuck what should you do?

When h2o is removed from the mixture does the equilibrium shift to the right to the left or is there no shift?

Which best explains why the acoustics underwater affect the Doppler effect? Sound waves can not transfer energy through water. Sound waves can not travel through water. The speed of sound is less in water than in air.

What is the part of the cell that stores food?