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An initially neutral ball bearing is hooked up to a machine that transfers electrons onto it. Afterwards, the ball bearing is analyzed and its charge is -2.81×10-9 C. Find the mass increase due to the electron transfer. An electron has a mass of 9.11×10-31 kg.
2750 g of lead at 120 degrees C is added to .150 kg of 85 degrees C water. The heat of vaporization for water is 22.6 X 10^5 J/kg. How much water (in kg) evaporates
A sphere of radius 10.0 cm floats in equilibrium partially submerged in water with it's lowest point 5.00cm below the water's surface. What is the buoyant force acting on the sphere
assume a bar 2 m long expands 0.6 cm when heated. By how much will a bar 100 m long of the same material expand when similarly heated.
Your friend's car runs out of fuel and you volunteer to push it to the nearest gas station. what is the contact force between the two bumpers
A small wooden block with mass 0.850 kg is suspended from the lower end of a light cord that is 1.54 m long. The block is initially at rest. What is the initial speed of the bullet
Two tugboats pull a disabledsupertanker. Each tug exerts a constant force of 1.55 x 106 N,one 20° west of north and theother 20° east of north, What is the total work they do on the supertanker
consider a model rocket that is lunched in a vertical direction. Nelected air resistance and changes in its mass , m. determine the mamimum alttiude
question 1 what is the resistance of 5.8 mi of copper wire with a diameter of 0.53 mm?question 2 a 75v- generator
A state trooper chases a speeder along astraight stretch of road; both vehicles move at 155 km/h. What is the Doppler shift in the frequency heard by the speeder
In a very busy off-campus eatery one chef sends a 249-g broccoli-tomato-pickle-onion-mushroom pizza sliding down the counter from left to right at 1.67 m/s. At what speed does it move
A car moving at 10 m/s encounters a bump that has a circular cross-section with a radius of 30 m. What is the normal force exerted by the seat of the car on a 60-kg passenger
A 0.43 T magnetic field is perpendicular to a circular loop of wire with 56 turns and a radius of 16cm .If the magnetic field is reduced to zero in 0.14s , what is the magnitude of the induced emf?
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