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In a heart pacemaker, a pulse is delivered to the heart 81 times per minute. The capacitor that controls this pulsing rate discharges through a resistance of 2.0 x 106. One pulse is delivered every time the fully charged capacitor loses 62.1% of its original charge. What is the capacitance of the capacitor?
The far point of a nearsighted person is 5.1 m from her eyes, and she wears contacts that enable her to see distant objects clearly. How high is the image formed by the contacts
Nerve proagation in your body occurs when large electric fields in the cell membranes on neurons (1.0*10^7 N/C) cause ions to move through cell walls
Imagine that a certain bugle plays in C, so that the pitches in "Taps" are low G (196 Hz), middle C (261 Hz), E (329 Hz), and G (392 Hz). How long would this bugle be if uncoiled
An equation of state for a certain material is found to be pV2 – aTV = bT, where a and b are constants. In terms of p, V, T, find (i) the coefficient of thermal expansion, and (ii) the isothermal compressibility.
An object is moving with a constant velocity V1=2i+4j for 5 seconds. It then moves with a constant velocity of V2=-3i=2j for 10 seconds, determine the final velocity vector
A uniform door weighs 50-N and is 1.0 m wide and 2.70m high. What is the magnitude of the torque because of the door's own weight about a horizontal axis perpendicular to the door and passing through a corner.
The wheel weighs 70 kg, and is 120 cm in diameter. you mount the wheel by its central axis, What is the angular velocity of the wheel at the end of the fall
A photographer uses his camera, whose lens has a 70mm focal length, to focus on an object 4.5m away. In which direction must the lens move to focus on this second object
Two skaters, a man and a woman, are standing on ice. Neglect any friction between the skate blades and the ice. Determine the acceleration (magnitude and direction) of the man
A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 5.00 g coins stacked over the 6.0 cm mark, What is the mass of the meter stick
Calculate the height of the potential barrier for a head on collision of 2 deutrons. Assume that they can be taken as hard spheres of radii 2fm.
You are standing on a sheet of ice that covers the football stadium parking lot in Buffalo; there is negligible friction between your feet and the ice. If you catch the ball, with what speed do you and the ball move afterwards
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