Physics, 25.11.2020 14:50 salinasroel22
How does the electric current of an AC generator differ from that of a DC generator ?
A- it flows through the permanent magnets
B- it is much stronger
C- it is much weaker
D- it constantly reverses direction
Answers: 1
Physics, 22.06.2019 05:00
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 12:00
Explain what happens at the saturation point when adding salt to water at room temperature.
Answers: 3
Physics, 22.06.2019 13:30
The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?
Answers: 1
Physics, 22.06.2019 23:00
Awelder using a tank of volume 7.50ร10^-2 m^3 fills it with oxygen (with a molar mass of 32.0 g/mol ) at a gauge pressure of 3.30ร10^5 pa and temperature of 37.1 โc. the tank has a small leak, and in time some of the oxygen leaks out. on a day when the temperature is 23.1 โc, the gauge pressure of the oxygen in the tank is 2.00ร10^5 pa . a) find the initial mass of oxygen. b) find the mass of oxygen that has leaked out.
Answers: 3
How does the electric current of an AC generator differ from that of a DC generator ?
A- it flows t...
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