When one kilogram of uranium undergoes nuclear fission,
A) the total amount of rest-mass is conserved. B) the total amount of energy is conserved.
C) Both of the above. D) Neither of the above.
B
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To hold a 5 lb bag of sugar in your hand, you must push upwards on it with a force of 5 lb. This is an example of Newton's third law
a. True b. False Indicate whether the statement is true or false
The difference between the pressures inside and outside a tire is called __________
Fill in the blank(s) with correct word
Matter Waves: Electrons with a speed of 2.1 × 106 m/s are directed towards a 1.0-?m wide slit. An electron detector is placed 1.0 m behind the slit. How wide is the central maximum of the electron diffraction pattern on the detector? (h = 6.626 × 10-34 J ? s, melectron = 9.11 × 10-31 kg)
A. 690 ?m B. 350 ?m C. 1000 ?m D. 1400 ?m
Compare the axial heat flux achievable by a heat pipe using water as the working fluid with that of a solid silver rod. Assume that both are 20-cm-long, that the temperature difference for the rod from end to end is 100°C and that the heat pipe operates at atmospheric pressure. State your other assumptions.
GIVEN ? Silver rod and a heat pipe, both 20-cm-long ? End-to-end temperature difference of 100°C ? Heat pipe operates at atmospheric pressure FIND (a) Axial heat flux for both rods ASSUMPTIONS ? Neglect heat pipe vapor pressure drop ? Horizontal operation for the heat pipe ? Perfect wetting of the heat pipe fluid, ? ?= 0 PROPERTIES AND CONSTANTS From Appendix 2, Table 12, the conductivity for silver at 63°C is ksilver = 424 W/(mK)