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A centrifuge in a medical laboratory rotates at an angular speed of 3450 rev/min. When switched off, it rotates through 54.0revolutions before coming to rest. Find the constant angular acceleration of the centrifuge.
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Question: A spherical balloon has a radius of 6.95m and is filled with helium. The density of helium is 0.179 kg/m3, and the density of air is 1.29 kg/m3. The skin and structure of the balloon has a mass of 960kg . Negle ...
Can you help me with these questions? How can you tell if a single measurement is more precise than another? If the smallest division on a scale is 0.1 mL, to what precision should you take a volume measurement using tha ...
A high-speed train is built to be 600 m long. The train is passing through a 500 m long tunnel. a. At what speed, according to an observer on the ground, the train will be just completely covered by the tunnel at one ins ...
Question: Problem: During a very quick stop, a car decelerates at 7.2 m/s2. Assume the forward motion of the car corresponds to a positive direction for the rotation of the tires (and that they do not slip on the pavemen ...
Question: Planet X orbits the star Omega with a "year" that is 180 earth days long. Planet Y circles Omega at four times the distance of Planet X. How long is a year on Planet Y in earth days? The response must be typed, ...
One cubic meter (1.00m^3) of concrete has a mass of 2.30E+3kg, and 1.00m^3 of copper has a mass of 8.92E+3kg. Find the radius of an concrete sphere whose mass is the same as that of an copper sphere of radius 1.28cm?
Question: Six artificial satellites complete one circular orbit around a space station in the same amount of time. Each satellite has mass m and radius of orbit L. The satellites fire rockets that provide the force neede ...
Question: At what speed does a ball hit the ground if you toss a 120 g ball straight up to just touch the 12-m-high roof of the gymnasium if you release the ball 1.5 m above the ground? Solve this problem using energy. T ...
Question: A proton has been accelerated from rest through a potential difference of -1350 V. What is the proton's kinetic energy, in electron volts? What is the proton's kinetic energy, in joules? What is the proton's sp ...
The amount of chemical energy released in burning heating oil is approximately 130 MJ per gallon. This is the amount of energy released as heat during combustion. (a) Suppose that during the winter, heating a home with o ...
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