Suppose the number of coils in the solenoid of an electromagnet is increased. What happens to the electromagnet?
A. Its strength increases, then decreases.
B. Its strength becomes greater.
C. Its strength becomes less.
D. Its strength remains the same.

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?