If a new machine is more efficient than the old model, it uses a smaller amount of energy to do the same task
Why hasn't the experience with all the electric machines over the 130 year history of commercial electricity sales produced a machine that is 100% efficient?
It is impossible to eliminate all causes of friction in machines. It will never be
possible to have a machine that is 100% efficient.
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Significant Figures: Express the sum of 420.77, 13.821, and 2317.8 to the correct number of significant figures.
Fill in the blank(s) with the appropriate word(s).
Molecular Rotation: A diatomic molecule has 18 × 10-5 eV of rotational energy in the L = 2 quantum state. What is its rotational energy in the L = 0 quantum state? (1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
A. 9.0 × 10-5 eV B. 6.0 × 10-5 eV C. 3.0 × 10-5 eV D. 0 eV
Which of the following explanation is CORRECT about this statement?
A. This statement does not make sense, because we cannot see through the band of light we call the Milky Way to external galaxies; the dark fissure is gas and dust blocking our view. B. This statement makes sense, we can see through the band of light we call the Milky Way to external galaxies, as nothing is blocking our view. C. This statement makes sense, we can see through the band of light we call the Milky Way to external galaxies, and the binoculars are sensitive enough to view them even through the dark fissure of gas and dust blocking our view. D. This statement does not make sense, we can see through the band of light we call the Milky Way to external galaxies, but we need more sensitive equipment, than binoculars.
The Phoenix lander on Mars failed to confirm the presence of water ice under the surface
Indicate whether the statement is true or false