For a 0.1-kg frog to jump to a height of 1.0 meter requires an energy of about
A. 0.1 Joule.
B. 0.5 Joule.
C. 1.0 Joule.
D. 10 Joule.
Answer: C
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In Figure 7.4, the time for the fraction of residual strain in iron to drop to 0.6 at 400°C is 137 minutes, and at 450°C it is 15 minutes.
(a) Calculate the activation enthalpy for the recovery of cold work in iron. (b) Comment on the magnitude of the activation enthalpy for recovery in comparison to the activation enthalpy for vacancy diffusion in iron, and justify your result.
In an interference pattern, the wavelength and frequency are
A. the same in both the regions of constructive interference and the regions of destructive interference. B. greater in regions of constructive interference than in regions of destructive interference. C. smaller in regions of constructive interference than in regions of destructive interference. D. unchanged in regions of destructive interference but greater in regions of constructive interference. E. unchanged in regions of destructive interference but smaller in regions of constructive interference.
Head-tail radio galaxies reveal their motion through the intergalactic gas with a tail-like structure
Indicate whether the statement is true or false
A bimetallic strip is formed from two materials that have different __________
Fill in the blank(s) with correct word