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You are swinging your younger sister in a horizontal circle of radius 0.80 m. Her mass is 21 kg and you arrange it so she makes one revolution every 1.5 s.
a) What is the magnitude and direction of the force that must be exerted by you on her? (Model her as a point particle.)(b) What is the magnitude and direction of the force she exerts on you?
A 35.0 cm diameter coil consists of 30 turns of a circular copper wire 2.80 mm in diameter. determine the rate at which thermal energy is produced
A subway train has three cars, each weighing 1.20 x 10^5 N. The frictional force on each car is 103 N, and the first car, acting as an engine, exerts a horizontal force of 4.80 x 10^4 N on the rails.
During a bad weather day with an atmospheric pressure of 0.9 atm a submarine dives at a depth of 9.3 m.
1. a capacitor consists of two closely spaced metal conductors of large area separated by a thin insulating foil. it
Released from rest at the same height, a can of frozen juice rolls to the bottom of the same hill. What is the translational speed of the frozen juice can while it reaches bottom.
A hammer thrower spins with an angular velocity of 1200°/s. The distance from his axis of rotation to the hammer head is 1.2 m. What is the linear velocity of the hammer head
A 100-W resistance heater is connected to a 110-V doc source. What current flows through the heater
A bat strikes 0.150 kg baseball. Just before impact, the ball is traveling horizontally to the right at 50.5 m/s , find the vertical component of the average force on the ball
Near Earth, the density of protons in the solar wind (a stream ofparticles from the Sun) is 8.80cm-3 and their speed is about 470 km/s. Find the current density of these protons
The immediate environment of a reactor contains a large flux of 10 MeV gamma rays. Resolve the thickness of lead required to reduce the intensity by a factor of 1012. Assume the mass absorption coefficient of Pb for 10 MeV photons is m/r = 0.06 cm..
A source delivers an AC voltage of the form ?v = 96.2 sin (66?t), obtain the frequency of the source
A race car rounds a curve at 53 m/s. The radius of the curve is 450 m, and the car's mass is 620 kg. What is the centripetal force acting on the car
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