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A steel ball is hung from a vertical ideal spring where it oscillates in simple harmonic motion with a period T. At time t = 0 s, the ball is at its maximum displacement, A, from its equilibrium position. In terms of the period, at what time will the ball be at y = 0.75A?
Suppose the end of your finger is charged. (a) Estimate the breakdown voltage in air for your finger. (b) About what surfacecharge density would have to be on your finger at this voltage?
A Hollywood daredevil plans to jump the canyon shown in the figure on a motorcycle. What is his predicted landing velocity
A particle oscillates in simple harmonic motion with a period of 2.04 ? s and an amplitude of 3.94? cm. At t=0,it is at z=?2.0 cm and it is moving toward z = 0.
A bubble is held at a radius of 250 m. The transmural pressure difference is 2 mmHg. What is the tension in the wall
The current in a long solenoid of 95 turns generates a magnetic flux within it of 65.0 mWb per turn. what will be the induced emf
A potential difference is applied between the electrodes in a gas discharge tube. In 1.7 s, 3.2 1016 electrons, What is the current in the tube
A 62- kg gymnast stretches a vertical spring by 0.52 m when she hangs from it. How much energy is stored in the spring
A heat engine takes in 1000 J of energy at 1000 K and exhausts 615 J at 200 K. What are the actual and maximum theoretical efficiencies of this heat engine
A certain lightbulb is rated at 95 W when operating at an rms voltage of 1.95 V. What is the peak voltage applied across the bulb
A dedicated sports car enthusiast polishes the inside and outside surfaces of a hubcap that is a section of a sphere. When he looks into one side of the hubcap, What is the radius of curvature of the hubcap
The figure shows three identical chambers containing a piston and a spring with spring constant k. The chamber in a is completely evacuated, and the piston just touches its left end. In this position, the spring is relaxed. In b, the chamber contains..
The figure below gives the potential energy U of a magnetic dipole in an external magnetic field , as a function of angle between the directions of and the dipole moment. The vertical axis scale is set by Us = 2.0 10-4 J. The dipole can be rotated..
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