Physics, 21.01.2021 22:50 xonyemaa12
A 21,000 kg train is traveling at 21 m/s. It accelerates as it enters a tunnel because of a
constant force of 45,000 N from the engine. The train is in the tunnel for 5.25 seconds. What
is the final speed of the train?
Answer from: Quest
ice to water 1 water to vapour 2 latent heat
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in physics zero. in muscle fatigue could be high
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Protons have a positive charge and, collectively, give an element its atomic number.
Answer from: Quest
Ithink it’s cancer risk
Physics, 21.06.2019 23:30, Izzyfizzy1
Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?
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How many hydrogen (h) atoms are in one molecule of sulfuric acid, h2so4? (1 points) 1 2 4 7
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Physics, 22.06.2019 10:30, zoebtharpe
An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.
Answers: 2
Physics, 22.06.2019 10:50, afonseca73
Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.
Answers: 3
A 21,000 kg train is traveling at 21 m/s. It accelerates as it enters a tunnel because of a
constan...
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