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Q. On a rainy day, raindrops fall with a vertical velocity of 11.7 m/s. If a car drives through the rain at 87.0 km/hr, what is the magnitude of the velocity of the raindrops relative to the car?
Q. A square coil that is 20 cm on a side is made of 10 turns of wire. It is in a 0.8T magnetic field that is perpendicular to the plane of the coil. The coil has a resistance of 100 ohms. If it takes 0.5 seconds to completely remove the coil from the field. What is the average induced EMF?
The two springs each have a spring constant of 11. They are stretched by 1 as a current passes through the wire. How big is the current.
Suppose a ping-pong ball and a bowling ball are rolling toward you with the same momentum, and you exert the same average force in stopping each of them.
A kid fires water horizontally from a squirt gun held 1.6 above the ground. It hits other kid 2.4 away squares in the back, at a point 0.85 above the ground. What was the initial speed of the water.
Old MacDonald had a farm, and on that farm he had a gate (see below). The gate is 3m wide and 1.8m high, with hinges attached to the top and bottom. The guy wire makes an angle of 300 with the top of the gate and is tightened by a turn buckle to a..
You are driving to grocery store at 15 m/s .You is 140 m from an intersection when the traffic light turns red. Suppose that your reaction time is 0.70 s. and that your car brakes with constant acceleration. How far are you from the intersection whil..
A 66 {rm kg} skier speeds down a trail, as shown in the figure . The surface is smooth and inclined at the angle of 22 ^circ with the horizontal. Find the magnitude of the net force acting on the skier.
An 8m, 200 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.55, and ladder makes a 50.0° angle with the ground. How far up the ladder can an 800 N person climb before the ladde..
An iron bolt of mass 60.0 g hangs from a string 33.1 cm long. The top end of string is fixed. Without touching it, a magnet attracts the bolt so that it remains stationary, displaced horizontally 27.0 cm to the right from the previously vertical l..
Speedboat A negotiates a curve whose radius is 115 m. Speedboat B negotiates a curve whose radius is 194 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
In an effort to stay awake for an all-night study session, a student makes a cup of coffee by first placing a 200 W electric immersion heater in 0.320kg of water.
What would be the radius of curvature of the cornea
At what distance along the central axis of a ring of radius 1.8 cm and uniform charge 66 C is the magnitude of the electric field maximum.
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