Why would the tidal forces around a black hole be of concern to a space explorer interested in investigating the area near a black hole?
What will be an ideal response?
The difference in gravity between the explorer's head and feet (if he or she is oriented vertically) would stretch the explorer, eventually tearing the explorer apart.
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The thermal conductivity of silver at 212°F is 238 Btu/(h ft °F). What is the conductivity in SI units?
GIVEN - Thermal conductivity of silver (k) = 238 Btu/(h ft °F) FIND - Thermal conductivity of silver in SI units: W/(m K)
Two vectors lying in the xy plane are given by the equations 
and 
. The value of 
class="Wirisformula" align="middle" /> is A.
B.
C.
D.
E.
White light is sent through a prism, and the various colors are separated in typical fashion. Which of the following colors would have the highest index of refraction in this prism?
a. green c. blue b. red d. yellow
Which is the correct order of the states of matter of a substance, from coldest to hottest?
a. solid, gas, liquid, plasma. b. plasma, gas, liquid, solid. c. gas, liquid, solid, plasma. d. solid, liquid, gas, plasma. e. plasma, liquid, gas, solid.