In testing a new material for shielding spacecraft 145 small ball bearings, each moving at a supersonic speed of 399.5 m/s, collide headon and elastically with the material during a 0.808 min interval. if the bearings each have a mass of 6.1 g and the area of the tested material is 0.78 m2 , what pressure is exerted on the material
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Physics, 21.06.2019 20:30
F500 j of energy were added to 1 kg of each of these samples, which would experience the least temperature increase?
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Physics, 21.06.2019 22:30
The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force
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Physics, 21.06.2019 23:00
Asubmarine has a "crush depth" (that is, the depth at which water pressure will crush the submarine) of 250 m. what is the approximate pressure (water plus atmospheric) at this depth? (recall that the density of seawater is 1025 kg/m3, g = 9.81 m/s2, and 1 kg/(ms2) = 1 pa = 9.8692 10-6 atm.) a. 34.8 atm b. 24.8 atm c. 25.8 atm d. 7.8 atm
Answers: 2
Physics, 22.06.2019 05:00
Modern physics a photon emitted from an excited hydrogen atom has an energy of 3.02 electron volts. which electron energy-level transition would produce this photon? a. n=1 to n=6 b. n=2 to n=6 c. n=6 to n=1 d. n=6 to n=2 i chose b but the correct answer is d can someone tell me why? and what's the difference?
Answers: 1
In testing a new material for shielding spacecraft 145 small ball bearings, each moving at a superso...
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