Physics, 12.05.2021 14:00 ashl3yisbored
Which statements are part of the safety protocol for this lab experiment? Check all that apply.
Wear a lab coat and safety goggles when performing an experiment.
Always measure chemical quantities twice before adding to solution.
Use caution when connecting electric circuits.
Do not drop the magnets.
Do not use electrical currents.
Do not bring bar magnets near magnetic devices.
Always disconnect circuits when not in use.
Answer : a, c,d, f
Answers: 2
Physics, 22.06.2019 05:00, masie03
Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct
Answers: 1
Physics, 22.06.2019 11:20, cjd1214812148
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
Which statements are part of the safety protocol for this lab experiment? Check all that apply.
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