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Two particles of identical mass m are acted on only by the gravitational force of one upon the other. If the distance d between the particles is constant, what is the angular velocity of the line joining them? Use Newton's second law with the center of mass of the system as the origin of the inertial frame.
A light bulb is rated at 60 W when connected to 120V. What current flows through the bulb in this case
A speedboat starts from rest and accelerates at +2.01 m/s2 for 7.25 s. At the end of this time, Find the total displacement of the boat
When a train's velocity is 12.0 {\rm{ m/s}} eastward, raindrops thatare falling vertically with respect to the earth make traces thatare inclined 30.0 ^\circ to the vertical on the windows ofthe train.
A physics student, who weighs 529.0 N stands on a bathroom scale in an elevator that is supported by an elevator cable; the mass of the elevator, including the student inside, is 853.0 kg. Find the magnitude of the acceleration of the elevator at t..
Suppose you moved a box across a rough horizontal surface with a 50 N force over a displacement of 10 m. If the frictional force at the interface was 10 N, how much work was done to the box?
A PROTON moves at a speed of 70 m/s perpendicular to the direction of a uniform magnetic field of 10 T. What is the radius of the proton's circular orbit in units of nanometers
the flywheel of an old steam engine is a solid homogeneous metal disk of mass m 117 kgand radius r 80 cm.the engine
a. work done to freeze 1 L of waterb. coefficient of performance, given that the heat of fusion of water is 334.72 Jg-1.
Concept Simulation 5.1 reviews the concepts that are involved in this problem. A child is twirling a 0.0282-kg ball on a string in a horizontal circle whose radius is 0.109 m. by what factor does the centripetal force increase
When its coil rotates at a frequency of 280 Hz, a certain generator has a peak emf of 75V. What is the peak emf of the generator when its coil rotates at a frequency of45 Hz? Determine the frequency of the coil'srotation when the peak emf of the ..
A microphone is moving in air towards a stationary source of sound. The detected frequency is 106 Hz greater than the emitted frequency. What is the speed of sound in the unkown liquid
A laser beam travels from air (n=1.002) into glass (n=1.522)and then into gelatin. The incident ray makes a 58 angle with the normal as it enters the glass and a 36.4 angle with the normal in the gelatin. Determine the angle of the refracted ray in..
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