Hiro wants to model the magnetic field of a bar magnet using a shoe box and pipe cleaners. He labels the ends of the shoe box N and S.

How should he position the pipe cleaners? Check all that apply.

Among three bases, x-, y-, and z-, the strongest one is y-, and the weakest one is z-. rank their conjugate acids, hx, hy, and hz, in order of decreasing strength.

If the primary of a transformer were connected to a dc power source, A. the transformer would have a voltage output the same as its input. B. at a higher efficiency than with an ac source. C. that is also dc. D.

7. How much force is needed to give a 10-kg mass an acceleration of 35 m/s?

A test charge of - 1.4 * 10-7 coulomb experience a force of 5.4 * 10^-1 Newtons. calculate the magnitude of the electric field created by the negative test charge.

Which method is used to counteract the effects of erosion caused by water

A car is slowed because the air it is moving through pushes against it. This contact force is know as air ... a) resistence b) impact c) tension d) stress

What are the contract fforcs and non-contact forces?

A 10 kg wagon rests on an inclined plane. The plane makes an angle of 30° with the horizontal. Approximately how large is the force required to keep the wagon from sliding down the plane? A) 10 N B) 49 N C) 85 N D) 98 N

Arrange the listed objects according to their angular speeds, from largest to smallest. a tire of radius 0.381 m rotating at 12.2 rpm a bowling ball of radius 12.4 cm rotating at 0.456 rad/s a top with a diameter of 5.09 cm spinning at 18.

True or false? If a train is slowing down, is it accelerating?