What is the net force inward acting on a spherical bathysphere of diameter 2.00 m at an ocean depth of 1 000 m? (The pressure inside the bathysphere is, hopefully, 1 ATM.) r(sea water) = 1.02 × 10^3 kg/m3
a. 1.26 × 10^4 N
b. 1.26 × 10^6 N
c. 1.26 × 10^8 N
d. 1.26 × 10^10 N
e. 1.26 × 10^2 N
C
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Which of the following is the reason for the solar day being longer than a sidereal day?
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A light beam with wavelength 440. nm in a material then enters air and its wavelength becomes 577. nm
(a) What is the index of refraction for the material? (b) At what angle with the surface will the beam be totally reflected back in the material?
Why is the temperature at the region of a sunspot cooler than the photosphere?
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