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

Which statement explains the similarity between momentum and kinetic energy of an object? Both are inversely proportional to the mass and velocity of the object. B. Both increase as the mass and velocity increase. C.

Covalent bonds are weaker than the hydrogen bonds used to hold water molecules together. True or false if u get this right ill be happy to give brainthingy

A 2 kg book is sitting on a table. A 10 N force is pulling it to the right. A 3 N force is pulling to the left. What is the Net Force acting on the book? A. 2 N down B. 7 N to the right C. 13 N to the right D. 15 N to the right

The front 1.20 m of a 1,350-kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a car traveling 30.0 m/s stops uniformly in 1.20 m, how long does the collision last

What is the reason that solar power provides for so little of our energy needs?

List 6 Physical properties List 6 Chemical properties

Anytime a scientific theory is challenged does it mean that its not a good theory

A toroidal inductor has a circular cross-section of radius a a. The toroid has N turns and radius R. The toroid is narrow (a≪R), so the magnetic field inside the toroid can be considered to be uniform in magnitude.

A quarterback throws a football with an initial velocity v at an angle θ above horizontal. Assume the ball leaves the quarterback's hand at ground level and moves without air resistance.

Taking the direction west to be positive, and east to be negative, what is the average acceleration of a jet ski that goes from rest to 10 m/s west in 4 seconds? A. 2.5 m/s2 B. 0.4 m/s2 C. - 0.4 m/s2 D. - 2.5 m/s2