Physics, 07.04.2020 20:32, sbailey0962
A small spaceship with a mass of only 2.8 β 103 kg (including an astronaut) is drifting in outer space with negligible gravitational forces acting on it. If the astronaut turns on a 30 kW laser beam, what speed will the ship attain in 1.0 day because of the momentum carried away by the beam?
Answers: 1
Physics, 21.06.2019 14:10, sandersmakaylaovq5vu
Asteady current of 1 ais flowing through a conducter calculate the number of electrons that flows through conductor in 1second
Answers: 1
Physics, 22.06.2019 19:50, fili20
The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 Γ 10-6 ΟΒ·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 Β’ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to itβs resistivity when at operating temperature? explain.
Answers: 3
Physics, 23.06.2019 07:10, timothyashburn8
50.)the diagram below represents the wave fronts produced by a point source moving to the right in a uniformmedium. observers are located at points a and b. compared to the wave frequency and wavelength observed at point a, the wave observed at point b has a(1) higher frequency and a shorter wavelength(2) higher frequency and a longer wavelength(3) lower frequency and a shorter wavelength(4) lower frequency and a longer wavelength
Answers: 3
A small spaceship with a mass of only 2.8 β 103 kg (including an astronaut) is drifting in outer spa...
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