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A metal sphere hangs from a string and has 4 kg of mass. The sphere has a charge of +2.3 µC. A uniform electric field is turned on and directed to the right.
A) What is the electric force on the metal sphere if the magnitude of the electric field is 106 N/C?
B) When the sphere reaches equilibrium, what is the angle that the string makes with the vertical axis (assuming the same electric field as part (a))?
A 46.0-kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 20.0 m. What is the centripetal acceleration of the child
A 39.6-kg boy, riding a 2.33-kg skateboard at a velocity of +5.07 m/s across a level sidewalk, find the skateboard's velocity relative to the sidewalk at this instant
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44.3 kg of ice is melted into water then raised to a temperture of 354.8 K. How much energy is needed to complete this process
A coil has an induced voltage of 120 volt when the rate of flux change is 0.4 Wb/s. How many turns are in the coil
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What is the terminal speed for an 84.00 skier going down a 38.0 degree snow-covered slope on wooden skis = 0.06? Assume the skier is 1.70 m tall and 0.500 m wide.
A Carnot engine has an efficiency of 0.361, and the temperature of its cold reservoir is 406 K. (a) Determine the temperature of its hot reservoir. (b) If 5950 J of heat is rejected to the cold reservoir, what amount of heat is put into the engine..
A string is wrapped tightly around the circumference of a wheel with a mass of 1.23 kg and a radius of 0.324 m. What is the moment of inertia of the wheel
The Moon's mass is 7.36x10^22 kg and its assumed circular orbit has radius 3.84x10^8 and a period of 27.3 days. Find the moons kinetic energy.
A fire truck has a siren with that generates a sound with a frequency of 6686 Hz. what frequency will you observe
A double-concave lens has equal radii of curvature of 15.1 cm. An object placed 14.2 cm from the lens forms a virtual image 4.94 cm from the lens. What is the index of refraction of the lens material
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