Calculating angular displacement Thinking about an analogue clock, calculate the angular displacement in revolutions, radians and degrees for the following: . A second hand after three minutes • An hour hand after 20 minutes . The minute hand as it moves from 9.15 to 12.45.

Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.