4300 seconds is equal to:
a. 1 hour, 11 minutes, 40 seconds
b. 2 hours, 10 minutes, 0 s...
Physics, 28.10.2020 15:50 victoriaashby
4300 seconds is equal to:
a. 1 hour, 11 minutes, 40 seconds
b. 2 hours, 10 minutes, 0 seconds
c. 11 hours, 56 minutes, 40 seconds
d. 71 hours, 40 minutes, 0 seconds
Answers: 3
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 12:30
Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.
Answers: 1
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Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine
Answers: 2
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