How do the speeds at which we are moving with Earth's rotation and orbit compare to the speeds of more familiar objects?
A) Earth's rotation carries most people around the axis faster than a commercial jet travels, and Earth's orbit carries us around the Sun faster than the Space Station orbits Earth.
B) Earth's rotation carries most people around the axis at about the speed of a commercial jet, and Earth's orbit carries us around the Sun at about the speed of a military jet.
C) Earth's rotation carries most people around the axis at about the speed of a car on the freeway, and Earth's orbit carries us around the Sun at about the speed of a commercial jet.
D) Earth's rotation carries most people around the axis at about the speed at which the Space Station orbits Earth, and Earth's orbit carries us around the Sun at nearly the speed of light.
A) Earth's rotation carries most people around the axis faster than a commercial jet travels, and Earth's orbit carries us around the Sun faster than the Space Station orbits Earth.
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Imagine that the sun ceased emitting light at wavelengths from about 600 to 700 nm. How would this look to us, and why?
What will be an ideal response?
What is the maximum velocity of a photoelectron emitted from a surface with work function 5.22 eV when illuminated by 200-nm ultraviolet light? (melectron = 9.11 × 10^-31 kg, h = 6.63 × 10^-34 J×s, 1 eV = 1.60 × 10^-19 J, and 1 nm = 10-9 m)
a. 800,000 m/s c. 653,000 m/s b. 212,000 m/s d. 591,000 m/s
According to Einstein, gravity is not the force exerted by one object on another, but rather the
A) effect we witness when a large mass causes a curvature in the shape of spacetime. B) force of attraction that exists between two objects. C) effects of the graviton particle. D) curvature of space caused by objects reaching the speed of light.
The radiation curve is a plot of light intensity versus frequency for an incandescent source such as a glowing lamp filament. If the source of light were excited atoms in the gaseous phase, the radiation curve would look like
1) I. 2) II. 3) III. 4) IV. The plot shown in IV is of 5) monochromatic light. 6) a very bright source. 7) light that has passed through a thin slit.