Work: A traveler pulls on a suitcase strap at an angle 36° above the horizontal. If 555 J of work are done by the strap while moving the suitcase a horizontal distance of 15 m, what is the tension in the strap?
A. 46 N
B. 37 N
C. 52 N
D. 56 N
Answer: A
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In a(n) _____________reaction, liquid transforms to two solids ? and ?.
Fill in the blank(s) with the appropriate word(s).
If the column of mercury in a barometer stands at 69.4 cm, what is the atmospheric pressure? (The density of mercury is 13.6 × 10^3 kg/m3 and g = 9.80 m/s2.)
a. 0.968 × 10^5 N/m2 c. 0.925 × 10^5 N/m2 b. 1.03 × 10^5 N/m2 d. 1.07 × 10^5 N/m2
A key clue to how the solar system formed is the observation that all the planets orbit close to the same plane
Indicate whether the statement is true or false
Derive an equation for the net rate of radiant heat transfer from surface 1 in the system shown in the accompanying sketch. Assume that each surface is at a uniform temperature and that the geometrical shape factor F1–2 is 0.1.
IVEN
• The system shown above
FIND
• An expression for the net rate of radiant heat transfer from surface 1 (q1) ASSUMPTIONS
• Steady state
• A1 and A2 are gray, A0 is black
• Each surface is at a uniform temperature
• The shape factor F12 = 0.1
PROPERTIES AND CONSTANTS
he Stephan-Boltzmann constant (?) = 5.67× 10–8 W/(m2 K4)