Physics, 27.08.2019 17:30 lucretiak74
An 800kg roller coaster starts from top of a 45m hill with a velocity of 4m/s. the car travels to the bottom, through a loop, and continues up the next hill. the end of the roller coaster has a level surface that is 4m off the ground. assume there is no friction on the roller coaster ridea and energy is concerved.
q. how tall is the hill if the roller coaster is traveling at 10m/s at the top of it?
q. what will be the velocity of the roller coaster at the top of the loop?
Answers: 1
Physics, 22.06.2019 11:20
The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)
Answers: 3
Physics, 22.06.2019 13:30
If the spring constant k of a pogo stick is 3500 n m and the weight of the person on the pogo stick is 700 n, how much is the spring in the botom of the pogo stick compressed?
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Physics, 22.06.2019 17:30
Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=
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Physics, 22.06.2019 21:20
The strong nuclear force acts over a small distance than the electrostatic force. true or false
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An 800kg roller coaster starts from top of a 45m hill with a velocity of 4m/s. the car travels to th...
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