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A .5kg mass attached to the end of a string swings in a vertical circle (radius =2m) When the mass is at the lowest point on the circle, the speed of the mass is 12m/s. What is the magnitude of the force of the string on the mass at this position?
Light hits the surface of water at an incident angle of 19° with respect to the normal line. What is the angle between the reflected ray and the refracted ray
A playground merry-go-round of radius R = 1.20 m has a moment of inertia I = 275 kg · m2, What is the new angular speed of the merry-go-round
You have a concave spherical mirror with a 13.3-cm radius of curvature. You place an object on the mirror's axis, How far is the object's image from the mirror
A space probe in deep space is moving along the x-axis at a speed of v0 when it is hit by a meteor. What is the final direction and speed (in terms of v0) of the probe
After flying for 15 min in a wind blowing 42 km/h at an angle of 32° south of east, What is the speed of the airplane relative to the air
This is accomplished using two small rockets, each with 150-N thrust, that are mounted on the rim of the station.
A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 30.0 min at 90.0 km/h, 5.0 min at 90.0 km/h, Determine the average speed for the trip
q1. two wires each 28.15 cm long are connected to two separate 9.00 v batteries as shown in the figure. the resistance
A simple pendulum has a mass of 0.350 kg and a length of 7.00 m. It is displaced through an angle of 12.0° and then released, What is the maximum angular acceleration
Two capacitors give an equivalent capacitance of 9.50 pF when connected in parallel and an equivalent capacitance of 1.80 pF, What is the capacitance of each capacitor
Three resistors having resistances of 1.50{\rm \Omega} , 2.30{\rm \Omega}, and 4.70{\rm \Omega} are connected in parallel to a 29.0{\rm V}battery that has negligible internal resistance
Electric charge is uniformly distributed inside a nonconducting sphere of radius 0.30 m. find the maximum magnitude of the electric field
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