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A dentist's drill starts from rest. After 7.28 s of constant angular acceleration it turns at a rate of 31540 rev/min.Find the drill's angular acceleration.Answer in units of rad/s 2.
A perfectly reflecting flat mirror is uniformly illuminated by light striking it perpendicularly. Calculate the intensity of the light
The surface charge density on an infinite sheet of charge is -2 x 10-6 C/m2. Find how far does the proton travel before reaching its turning point
In exercising, a weight lifter loses 0.145 kg of water through evaporation, the heat required to evaporate the water coming from the weight lifter's body. The work done in lifting weights is 1.21 x 105 J. (a) Assuming that the latent heat of vaporiza..
A beam of electrons is accelerated from rest through a potential difference of 0.110kV and then passes through a thin slit, How wide is the slit
A speedboat moving at 37.5 m/s approaches a no wake buoy marker a 100 m ahead. How long does it take the boat to reach the buoy
Assuming the cost of energy from the electric company is $0.105/kWh, Compute the cost per day of operating a lamp
In this problem two moles of an ideal gas at 400 K expand quasi-statically and isothermally from an initial volume of 49.0 L to a final volume of 83.0 L. What is the entropy change of the gas
A 3.25-kg object is moving in a plane, with its x and y coordinates given by x = 2t2 ? 4 and y = 4t3 + 4, Find the magnitude of the net force acting on this object
Draw a graph on the graph paper of x against t and use it to find the maximum speed at the end of the ruler.
A storage tank 31 m high is filled with pure water. Calculate the magnitude of the net force that acts on a square access hatch at the bottom of the tank that measures 0.6 m by 0.6 m
A roller-coaster car moves 227 ft horizontally and then rises 115 ft at an angle of 31.0° above the horizontal. What is its displacement from its starting point
A spelunker is surveying a cave. She follows a passage 150m straight west, then 230m in a direction 45, Use a scale drawing to determine the magnitude of the fourth displacement, Determine the direction of the fourth displacement
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