A wave travels in a string at 60 m/s. A second string of 40% greater linear density has the same tension applied as in the first string. What will be the resulting wave speed in the second string?
a. also 60 m/s
c. 72 m/s
b. 51 m/s
d. 55 m/s
B
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According to the standard model of fundamental particles, some of the fundamental particles form the "bricks" of the universe, while others form the "cement." Which among the following is one of the fundamental "cement" parti
A) the Z particle B) positron C) the neutrino D) the quark E) the proton
Two moles of an ideal gas are placed in a container of adjustable volume. When measurements are made
a. the pressure is inversely proportional to the volume at constant temperature. b. the temperature is directly proportional to the volume at constant pressure. c. the temperature is directly proportional to the pressure at constant volume. d. all the statements above are found to be correct. e. only statements (a) and (b) are found to be correct.
A Carnot cycle engine operates between a low temperature reservoir at 20°C and a high temperature reservoir at 800°C. If the engine is required to output 20.0 kJ of work per cycle,
how much heat must the high temperature reservoir transfer to the engine during each cycle? A) 27.5 kJ B) 73.2 kJ C) 39.2 kJ D) 800 kJ E) 20.5 kJ
A rod of 2.0-m length and a square (2.0 mm × 2.0 mm) cross section is made of a material with a resistivity of 6.0 × 10^-8 W × m. If a potential difference of 0.50 V is placed across the ends of the rod, at what rate is heat generated in the rod?
a. 3.0 W b. 5.3 W c. 8.3 W d. 1.3 W e. 17 W