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A 0.5kg mass of aluminum at 0 degrees Celsius is put in 1 kg of water at 78 degrees Celsius in a Calorimeter of negligible mass. What is the resulting temperature at equilibrium?
An implanted pacemaker supplies the heart with 72 pulses per minute, each pulse providing 3.0 V for 0.95 ms, Find the current that flows during a pulse
A very thin sheet of glass (n=1.5) floats on the surface of water (n=1.33). When illuminated with white light at normal incidence, What is the thickness of the glass
An electron is released from rest at a perpendicular distance of 10.8 cm from a line of charge on a very long nonconducting rod. That charge is uniformly distributed, with 8.1 μC per meter. What is the magnitude of the electron's initial acceleration..
A lightbulb operates at a power of 60 watts when connected to a potential difference of 120 volts. In this condition, how many electrons are passing though it per second
A string is wrapped several times around the rim of a small hoop with radius 8.00 cm and mass 0.180 kg. calculate the angular speed of the rotating hoop
A 30 g ball of clay is thrown horizontally at 20 m/s toward a 1.7 kg block sitting at rest on a frictionless hi surface. The clayts and sticks to the block. What is the speed of the block and clay right after the collision?
A gamma-ray photon produces an electron-positron pair, each with a kinetic energy of 255 keV. What was the wavelength of the photon
Gravity fed intravenous infusions are made possible by hanging a bag of fluid above the patient. If blood pressure is 18 mm Hg above atmospheric pressure, find the minimum height of the bag such that fluid flows into the body. Assume the density of t..
A person whose mass is 85.0 kg is exposedto a whole-body dose of 25.0 rads. How many joules of energy are deposited in the person's body
A 2-m-long, 4-cm-diameter shaft rotates inside an equally long 4.02-cm-diameter cylinder. If SAE-10W oil at 25-C fills the gap between the concentric cylinders, determine the torque and horsepower needed to rotate the shaft at 1200 rpm.
A horizontal vinyl record of mass 0.10kg and radius 0.10 m rotates freely about a vertical axis through its center with a rotational speed of 5.10 rad/s.
A particle is acted on by two torques about the origin: ?1 has a magnitude of 4.5 N·m and is directed in the positive direction of the x axis, and ?2 has a magnitude of 3.2 N·m and is directed in the negative direction of the y axis. What are the mag..
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