4. a jet pilot takes his aircraft in a vertical loop. a) if the jet is moving at a speed of 840 km/h at the
lowest point of the loop, determine the minimum radius of the circle so that the centripetal
acceleration at the lowest point does not exceed 6.0 g's. b) calculate the 78 kg pilot's effective
weight (the force with which the seat pushes up on him) at the bottom of the circle, and c) at the top
of the circle (assume the same speed).

The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=0∘ with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=30∘ with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=45∘ with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=60∘ with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=90∘ with the plane of polarization?

Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:

In which type of system is power held solely by the central government and not shared with regional governments? group of answer choices federal unitary confederate oligarchic