An ac generator consisting of a coil with n turns rotating at angular speed ω in an external magnetic field b produces a maximum emf ε0.if you now decrease the number of turns in the coil to n/2 and at the same time cause it to rotate twice as fast, what will be the new maximum emf if you do not change any of the other quantities?

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.