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What are the advantages and disadvantages of photographic plates and films?
Estimate the mass of water vapour emitted from the cooling towerseach hour, the mass of water vapour produced in a week, and thevolume of condensed water vapour produced in a week.
A spherical object with a moment of inertia of 0.482mr2 starts from rest rolling down a 3.51-m high incline. what is its linear speed at the bottom of the incline
For a 120-V rms 60-Hz voltage, an rms current of 70 mA passing through the human body for 1.0?s could be lethal. What must be the impedance of the body for this to occur
A 110kg linebacker tackles an 85kg halfback. immediately before thecollision the linebacker is slipping with a velocity of 8.8 m/snorth and the halfback is sliding with a velocity of 7.2m/s east.what is the velocity at which the two players move t..
Piles of snow on slippery roofs can become dangerous projectiles as they melt. What is the minimum value of the coefficient of static friction
A 1.30 x10^3kg racecar is driving around a circular track of radius 159 m. What is the magnitude of the net force acting on the vehicle at this time and the force\'s direction relative to the velocity
In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.30 106 m/s. Find the centripetal acceleration of the electron
A charged particle travels undeflected through perpendicular electric and magnetic fields whose magnitudes are 1000N/C and 60mT , respectively. Find the speed of the particle if it is a proton.
A top is a toy that is made to spin on its pointed end by pulling on a string wrapped around the body of the top. The string has a length of 72 cm and is wrapped around the top at a place where its radius is 2.3 cm. The thickness of the string is neg..
A particle with a mass of 2.5 × 105 kilogram and a charge of +2.8 µC is released in a (parallel plate) uniform horizontal electric field of 11 N/C. determine how much charge is on each
A planet of mass m = 8.15 Ã? 1024 kg is orbiting in a circular path a star of mass M = 6.05 Ã? 1029 kg. What is the orbital period (in earth days) of the planet Tplanet
A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 5.47 m/s. The car is a distance d away, What is the maximum possible value for d
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