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At the position of the negative charge, what is the magnitude of the electric field due to the three positive charges? What is the magnitude of the attractive force on the negative charge?
A lightning bug flies at a velocity of 0.25 m/s due east toward another lightning bug seen off in the distance. A light easterly breeze blows on the bug at a velocity of 0.25 m/s. What is the resul
A projectile is launched from ground level at 100m/s at an angle of 45.0 degrees above the horizantal, and it is subject only to gravity.
If the football has a mass of 0.56 kg and the time of contact with the ball is 0.027 s, what is the force exerted by the ball on the kicker's foot?
Mercury is poured into a tall glass. Ethyl alcohol (which does not mix with mercury) is then poured on top of the mercury until the height of the ethyl alcohol itself is 129 cm. The air pressure at
A 9300 kg boxcar traveling at 20 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 10 m/s. What is the mass of the second car?
A car moving at 9 m/s crashes into a barrier and stops in 0.050 s. There is a 20 kg child in the car. Assume that the child's velocity is changed by the same amount as the car's in the same time pe
A hydrogen atom is in its n = 6 excited state. Determine, according to quantum mechanics, each of the following: The maximum value that the z component of the Lz of the angular momentum can have
Starting from rest with an acceleration of 0.37 m/s2, he covers the same distance as the ramp does, but in one-fourth the time. What is the speed at which the belt of the ramp is moving?
A test charge (q0 = -9.40 x 10-8 C), with a mass of 2.70 x 10-8 kg, is released from rest at one of the corners of the square. Determine the speed of the test charge when it reaches the center of th
A particle moving with a velocity of 1.3 m/s in the + x direction is given an acceleration of 0.10 m/s2 in the + y direction for 3.2 s. Find the final speed of the particle.
How high does the top of the ice block float above the water level?
Compare the speed of the light beam relative to the ground when the train is at rest and when it is moving. How does the behavior of the light beam differ from the behavior of a bullet fired forward
A parallel-plate capacitor has a plate area of 0.2 m2 and a plate separation of 0.1 mm. To obtain an electric field of 2.0 × 106 V/m between the plates, the magnitude of the charge on each pla
Mary weighs 521 N and she walks down a flight of stairs to a level 5.5 m below her starting point. What is the change in Mary's potential energy?
Coherent light with wavelength 602 passes through two very narrow slits, and the interference pattern is observed on a screen a distance of 3.00 from the slits. The first-order bright fringe is a di
A car of mass m=1350 kg is parked on a slope of angle =41.0o facing uphill. Calculate the normal force exerted by the road on the front and rear wheels.
A plane is headed due west with an air speed of 224 m/s. The wind blows south at 15.0 m/s. Find the velocity of the plane relative to the earth.
A harmonic wave is traveling along a rope. The oscillator that generates the wave completes 43.0 vibrations in 28.5s. A given crest of the wave travels 410cm along the rope in a time period of 11.4s
A golf ball is struck with a five iron on level ground. It lands 95.8 m away 4.05 s later. What was the direction of the initial velocity? Give the angle counterclockwise relative to the horizontal
You throw a snowball at an angle of 30.0° below the horizontal from the roof of a building that is 95.0 m above flat ground. The snowball hits the ground a distance of 45.0 m from the base of t
A 1.5 kg box moves back and forth on a horizontal frictionless surface between two springs. By how much will the box compress the weaker spring?
If he shot a dart at an antelope at rest 50 m away, and the antelope instantly began to accelerate at a constant rate away from the dart, running out of range of the dart just in time. Find the mini
How much charge resides on the outer surface? (b) If the charge in part (a) is due to K+ ions (charge +e), how many such ions are present on the outer surface?
A submarine dives 110m at and angle of 10.0 degrees below the horizontal. What are the horizontal and vertical components of the submarine's displacement?