Whats the core of electromagnet made of?

A 40-kilogram crate is at rest on a level surface. If the coefficient of static friction between the crate and the surface is 0.69, what horizontal force is required to get the crate moving?

A significant drawback to wind power is: A. oil companies discourage it. B. the cost of the turbines requires significant capital investment. C. the novelty of windmill technology raises the risk. D. the turbines obstructing the landscape. E.

If you double the mass of an object what is the result on the acceleration

Why do we see black? Is light being admitted reflected or absorbed or transmitted You will get brainlist if correct

Which answer best describes the flow of electrical charge? from a higher to a lower potential energy from a lower to a higher potential energy from a higher to a lower kinetic energy from a lower to a higher kinetic energy

A ball is being rolled by a normal push of 1000N. it is opposed by friction which has a force of 0.3kN and air resistance which has a force of 23N. Calculate the resultant force.

What was the change in internal energy (chemical energy plus thermal energy) of the person pulling the block?

One of the longer sides of a kite is 39 feet. one of the shorter sides is 25 feet. half the length of the shorter diagonal is 15 feet. what is the area of the kite?

As the width of an opening in a barrier increases, how will the amount of diffraction of the planar waves change as they pass through the opening? A. It will increase. B. It will decrease. C. It will remain the same.

Two forces whose resultant is 100N, are perpendicular to each other. if one of them makes an angle of 60° with the resultant, calculate it's magnitude Calculate the absolute pressure of an ocean depth of 1200atm.