Ouestion 1

Which of the following would attract? (click all that apply)

north and north

north and south

South and south

A wire of resistance 6.2 Ω is connected to a battery whose emf ε is 6.0 V and whose internal resistance is 0.45 Ω. In 2.

What is the strength of the electric field 0.020 m from a 12 µC charge? A. 5.4 * 106 N/C B. 2.7 * 108 N/C C. 5.4 * 1012 N/C D. 2.7 * 1014 N/C

A ball on a string makes 25.0 revolutions in 9.37 s, in a circle radius 0.450 m. What is it's velocity?

When using a lever, what needs to happen in order to increase the size of the output force and to raise the mechanical advantage of the lever?

Which has more momentum, and why: a fly moving at top speed or a truck parked in a parking lot.

Where are the magnetic fields stronger near a bar magnet? A) Top B) Center C) Ends D) Bottom

You pull a simple pendulum of length 0.225m to the side through an angle of 3.50∘ and release it. Part A How much time does it take the pendulum bob to reach its highest speed? Take free fall acceleration to be 9.80 m/s^2.

What is the velocity of a wave having a frequency of 25 Hz and a wavelength of 10m

What is the force on a 1-kg ball that is falling freely due to the pull of gravity

Which would react chemically by forming an ionic bond? A. 2 chlorine atoms with 7 valence electrons each B. 1 neon atom with 8 valence electrons and 1 lithium atom with 1 valence electron C.