What is a disadvantage of having lots of turns in an elctromagnet

The force required to stretch a Hooke's-law spring varies from 0 N to 62.4 N as we stretch the spring by moving one end 17.2 cm from its unstressed position. Find the force constant of the spring. Answer in units of N/m.

A body oscillates with simple harmonic motion accordingto the equation: x = (6.0 m) cos [ (3pai rad/s) t + pai/3 rad] at t = 2.0 s, what are: a.) the displacement b.) the velocity c.) the acceleration d.) the phase of the motion Also, what are e.

How much work must be done to bring three electrons from a great distance apart to 3.5*10-10 m from one another (at the corners of an equilateral triangle) ?

Let's say you are drinking a hot cup of tea. The cup is full and acts as an insulator for the tea. In addition, you are using a spoon to stir your sugar. While in the glass, the spoon is acting as what?

How long did the trip from camp wood to the pacific ocean and back again take?

If the car went 30 km west in 25 min. and then 40 km east in 35 min., what would be its total displacement?

Which of the following is not the name of a space station that was in orbit around Earth?

Relationship between acceleration and free fall

A SI unit used to measure force, equal to less than one-quarter of a pound, is the what

What basic form of energy is present in blowing wind?