Which of the following changes will result in a weaker electromagnet.

A. Using a longer wire

B. Using fewer coil of wire

C. Using a higher voltage

D. Using a shorter nail

Two campers pull a canoe. If the force of friction acting on the canoe is 84 N, then how much work does the two campers need to do to keep the canoe in the middle of the river for a displacement of 50 m?

What is the formula for the circumference of a circle?

A stone is launched straight up by a slingshot. Its initial speed is 19.6 m/s, and the stone is 1.50 m above the ground when launched, (a) How high above the ground does the stone rise? (b) How much time elapses before the stone hits the ground?

A runner has a speed of 5m/s and a mass of 130 kg what is his kinetic energy?

What is the crust of the earth made of

Which statement about ammeters and voltmeters is true? A. Current and voltage are the same throughout a circuit so where you place the ammeter and voltmeter doesn't matter. B.

Teens realize that things may be "shades of gray" after they enter Piaget's social stage. identity crisis stage. menarche stage. formal operational stage.

Technician A says that fractured rods have a unique mating surface and that only the cap that was fractured is the one that will fit that rod. Technician B says that a powdered metal rod is less expensive, lighter, and as strong as a forged rod.

What is the expected wavelength (in cm) of 10.5 ghz microwaves in free space?

There are 5,280 feet in 1 mile and 12 inches in one foot. How many inches are in a mile?