You can increase the strength of an electromagnet's field by

a.

decreasing the current in the solenoid.

b.

decreasing the number of loops in the solenoid.

c.

using a stronger ferromagnetic material for the core.

d.

winding the coils more loosely.

What is the energy source that heats a contracting protostar?

In which of the following situations or place would you want to reduce the force of friction (multiple answers) A.) moving your mouse along the mousepad B.) the axle of your car wheels while you are driving C.) you are climbing a steep ladder D.

The storm surge of a hurricane can cause forest fires tsunamis more hurricanes flooding

A child having mass 25 kg and velocity 2 m/s moves to the west. p = kgm/s

A high-voltage transmission line carries 756 A at 488 kV for a distance of 169 km. If the resistance in the wire is 0.248 Ω/km, how much power is dissipated due to resistive losses? Answer in units of W.

You are planning to make an open rectangular box from an 8-inch by 15-inch piece of cardboard by cutting congruent squares from the corners and folding up the sides. what is the largest volume you can make from a box this way in cubic inches?

At exactly the same time Daisy and Damond both step off a diving platform 5 m high. Damond jumps up and out from the platform, whereas Daisy just takes a step from a standing position.

What current flows through a 2.60-cm-diameter rod of pure silicon that is 20.5 cm long, when 1.00 ✕ 103 V is applied to it? (Such a rod may be used to make nuclear particle detectors, for example.)

What process causes gases in the atmosphere to trap heat near the surface of earth?

If sodium has one valence electron and sulfur has six, how many sodium atoms are needed to form an ionic bond with sulfur? ITS TWO