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A ball is attached to a center post with a string that is 0.587 m long. The ball is moving in a circle on a frictionless table top at a speed of 1.43 m/s with a radius of 0.587 m. What is the centripetal acceleration of the ball?
question if the restoring spring of a galvanometer weakens by 25 over the years what current will give full-scale
Write an equation for the magnetic flux through a coil as afunction of the strength of the magnetic field and the angle between the area vector and the magnetic field direction? For what angle is this expression a max? Min? Zero?
when light of wavelength 300 nm is incident upon potassium the emitted electrons due to the photoelectric effect have a
A spaceship is visiting Planet X. While descending to the surface, its rockets produce 25 kN of upward thrust and the spaceship's speed decreases at a rate of 0.15 m/s2. What is the mass of the spaceship
A skateboarder shoots off a ramp with a velocity of 6.5 m/s, directed at an angle of 60 degree above the horizontal. When the skateboarder reaches the highest point, find how far is this point horizontally from the end of the ramp
A yo-yo has a rotational inertia of 970 g·cm2 and a mass of 104 g. Its axle radius is 3.15 mm, What is the magnitude of its linear acceleration
A spaceship negotiates a circular turn of radius 2680 km at a speed of 30540 km/h. What is the magnitude of theangular velocity? What is the magnitude of the radial acceleration?
An eagle with 1.8m wingspan flaps its wings 21 times per minute, each stroke extending from 42%u2218above the horizontal to 42%u2218 below. What's the average tangential velocity of the wingtip
A uniform electric field, E = -50 N/C, fills a region of space. A partcicle with mass, m = 0.025 kg, bearing charge, q = 1mC, Determine where and when the particle crosses the x-axis
In an amusement park rocket ride cars are suspended from 4.25 m cables attached to rotating arms at a distance of 6.00m from the axis of rotation. What is the angular speed of rotation
Two identical conducting small spheres are placed with their centers 0.330 m apart. One is given a charge of 12.0 nC and the other a charge of 13.0 nC. Find the electric force exerted by one sphere on the other
An AC generator supplies 15 amps at 440V to a 50,000V power line through a step-up transformer. how much money would the energy supplier save per month if electricity costs $0.12/kWh by stepping up the voltage
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