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Q1. A certain car battery with a 14.0 V emf has an initial charge of 195 A•h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how long in hours can it deliver energy at the rate of 184 W?
Q2. The immediate cause of many deaths is ventricular fibrillation that is an uncoordinated quivering of the heart. An electric shock to the chest can reason for momentary paralysis of the heart muscle, after which heart sometimes resumes its proper beating. One type of defibrillator (photo below) applies a strong electric shock to the chest over a time interval of a few milliseconds. This device contains a capacitor of numerous microfarads, charged to several thousand volts. Electrodes called paddles are held against the chest on both sides of the heart, and capacitor is discharged through the patient's chest. Suppose energy of 270 J is to be delivered from a 30.0-µF capacitor. To what potential difference must it be charged?
What is tension in each of the cables
A 180g block hangs from a spring with spring constant 6.0 N/m. At the block is 31cm below the equilibrium point and moving upward with a speed of 98.0cm/s. What is the block's position at t = 9s.
What is magnitude of the difference in frequency
Establish the average net force
A diffraction grating with 395 lines/mm is 1.00 m in front of a screen. What is the wavelength of light whose first-order maxima will be 16.9 cm from the central maximum on the screen.
Estimate mean and maximum velocities for a liquid
How much energy is necessary to bring the system back
What is the flux of Zn moving down the rod? Write down all your assumptions (hint: you will need to look up the density of copper. You do not need to account for the variation in density with alloy composition). Clarify what the boundary conditions w..
How much time is spent in pushing the mower
At 500°C, the diffusion coefficient of Zn in brass is 4.10-17 m2.s-1. What is the flux of Zn moving down the rod.
Is the collision completely elastic
How long after being thrown will the balls collide
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