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Vector A -7.7 x Vector B -3.9 y Find the angle measured counterclockwise from the x axis in degrees?
Large fossil fuel or nuclear electrical power plants operate most economically when run at full capacity 24 hours a day. Excess electrical energy can be "stored" and recovered by pumping water into a reservoir on top of a mountain and letting it fall..
Three point charges are arranged at the corners of a square, with charge -Q on both the particle at the upper left corner and the particle at the lower right corner and with charge +2Q on the particle at the lower left corner.
A car travels at a speed of 29 m/s around a curve of radius 67 m. What is the net centripetal force required to keep the car from skidding sideway.
You are given a slide with two slits cut into it and asked how far apart the slits are. What is the separation of the two slits
A rocket which has an exhaust speed of 8.0 km/s is to have a lift-off vertical acceleration of 8.0 m/s2 from the NASA launch pad. at what minimum rate must the rocket consume fuel
The pilot of an airplane executes a loop-the-loop maneuver in a vertical circle. What is the pilot's apparent weight at the lowest point if his true weight is 160 lb
A uniform magnetic field points out of the page. The field fully penetrates a wire loop in the plane of the page. what is the averaged induced current
A Coast Guard cutter detects an unidentified ship at a distance of 22.0 km in the direction 15.0° east of north. Find the time required for the cutter to intercept the ship
What is the magnitude of the electric field. A 50-gram super ball traveling at 25m/s is bounced off a brick wall and rebounds at 22 m/s. A high speed camera records this event. If the ball is in contact with wall for 3.5 ms, what is the average acc..
The crest of the second hill is circular, with a radius of r = 35m. Avoid friction and air resistance. What must be the height h of the first hill so that skier just loses contact with the snow at the crest of the second hill.
The height of a helicopter is given by h=150+5(t)^2. Where h is in meters and s is in seconds. After 5s the helicopter releases a small mailbag. what is its velocity just before impact with the ground
If a beam is incident normal (perpendicular to the surface) to a plane mirror, what is the angle of reflections
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