Express the sum 1.00 kg + 1531 g + 2.54 × 104 mg in kilograms with the correct number of significant figures
A) 2.56 kg
B) 27.9 kg
C) 2.53 kg
D) 2.79 kg
A
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When both the pressure and the absolute temperature of an ideal gas are increased each by a factor of two, the volume occupied by the gas will
A) increase by a factor of four. B) increase by a factor of two. C) not change. D) decrease by a factor of two. E) decrease by a factor of four.
A train starts from rest and accelerates uniformly until it has traveled 2.1 km and acquired a forward velocity of The train then moves at a constant velocity of for 400 s. The train then slows down uniformly at until it is brought to a halt
The distance traveled by the train while slowing down is closest to A) 4.4 km. B) 4.2 km. C) 4.0 km. D) 3.8 km. E) 3.6 km.
Two point sources emit sound waves of 1.0-m wavelength. The sources, 2.0 m apart, as shown below, emit waves which are in phase with each other at the instant of emission. Where, along the line between the sources, are the waves out of phase with each other by ? radians?
A. x = 0, 1.0 m, 2.0 m B. x = 0.50 m, 1.5 m C. x = 0.50 m, 1.0 m, 1.5 m D. x = 0.75 m, 1.25 m E. x = 0.25 m, 0.75 m, 1.25 m, 1.75 m
One nuclear reaction that occurs occasionally in the sun is the fusion of three alpha particles. What isotope is produced by this reaction? NOTE: Atomic number 6 is carbon, number 7 is nitrogen, and number 8 is oxygen
A) 12O B) 14N C) 12N D) 12C E) 14C