What is the maximum radiation pressure exerted by sunlight in space (S = 1350 W/m2) on a flat black surface?
a. 2.25 × 10^?5 Pa
b. 0.06 Pa
c. 7 × 10^?4 Pa
d. 4.5 × 10^?6 Pa
e. 9.0 × 10^?6 Pa
d
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An x ray can be emitted when an electron undergoes an energy level transition
Indicate whether the statement is true or false
Concrete cubes at 60ºF are heated in a kiln which is at 400ºF and with a convective heat transfer coefficient of 5 Btu/hr?ft2?0F. Using thermal conductivity of 0.79 Btu/hr?ft?ºF, specific heat of 0.21 Btu/lbmºF, and thermal diffusivity of 8.3 x 10^-6 ft^2/s, determine the center temperature and the corner temperatures after 3 hours.
What will be an ideal response?
As far as you look, there seems to be nothing at all. Even the nearest electron is light-years away. No matter how far you travel, you can find no solid matter, not even a single proton. It's as if all of the matter in the universe has disintegrated
You do, however, detect a few strong gravitational fields—probably due to supermassive black holes—at enormous distances from you. Where are you? A) You are in the universe when it is 1040 years old. B) You are in the universe when it is 10100 years old. C) You are in the GUT era of the early universe during the period of inflation. D) You are in the Planck Era of the early universe. E) You are in the central regions of a quasar.
As you go higher and higher above the surface of the Earth, the weight of a body __________
Fill in the blank(s) with correct word