Abeam of light shining from water to air strikes the surface at an angle greater than 48° and produces total internal reflection. if the incident beam is at a 50° angle, at what angle is the reflected beam?

Aferris wheel is a vertical, circular amusement ride with radius 9 m. riders sit on seats that swivel to remain horizontal. the ferris wheel rotates at a constant rate, going around once in 9 s. consider a rider whose mass is 56 kg. at the bottom of the ride, what is the perpendicular component of the rate of change of the rider's momentum? at the bottom of the ride, what is the vector force exerted by the seat on the rider?

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

It is really hard for me right know