A nail projects 40.0 mm horizontally outward from a wall. A 25.0 N coat is hung from the end of the nail and the nail deflects downward by 
The shear strain of the nail is
a. 
b. 
c. 
d. 
e. 
e.
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John is nearsighted and cannot see things beyond 110 cm from his eyes. What is the focal length of the contact lenses that will enable him to see distant objects clearly?
A) +50 cm B) -50 cm C) -110 cm D) +110 cm E) -30 cm
Which of the following is not a consequence of the high thickness and peculiar composition of Venus's atmosphere?
a. We cannot see down to its surface in visible light. b. Its surface is very smooth. c. Venus looks highly reflective. d. The surface pressure is 100 times higher than on Earth's surface.
Find the frequency of X-rays of wavelength 2 × 10^-11 m. (c = 3 × 10^8 m/s)
a. 3 × 10^8 Hz c. 3 × 10^18 Hz b. 1.5 × 10^19 Hz d. 6 × 10^9 Hz
A 30.00 kg mass falls from a height of 4.000 m. The momentum of the mass just before it hits the ground is
A. 144.2 kg m/s. B. 187.8 kg m/s. C. 320.0 kg m/s. D. 442.4 kg m/s. E. 502.1 kg m/s.