The star Alpha Centauri A is the same type of star as the Sun, but its luminosity is about 1.6 times that of the Sun. What can we conclude?
A) Alpha Centauri A must have a vastly different interior structure than the Sun.
B) Alpha Centauri A fuses hydrogen into helium in its core at a higher rate than our Sun.
C) Alpha Centauri A has a much higher surface temperature than the Sun.
D) Alpha Centauri A is much farther from Earth than the Sun.
B
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A 120-V circuit has a breaker rated at 10 amps. If a 1050-W toaster is operating on this circuit, what is the largest number of 100-W bulbs that may also operate simultaneously on this circuit without tripping the breaker?
1.0 2.1 3.2 4.more than 2
Object A in the shape of a disk of radius r is placed a distance R away from an intense light source. Object B, made from the same material as object A, is in the shape of a disk of radius 2r and placed a distance 2R away from the same light source
We observe which of the following? A) Both objects experience the same amount of radiation pressure but receive different amounts of linear momentum. B) The objects experience different amounts of radiation pressure and receive different amounts of linear momentum. C) Both objects experience the same amount of radiation pressure and the same amount of linear momentum. D) The objects experience different amounts of radiation pressure but receive the same amount of linear momentum.
The burst of X-rays from an X-ray burster is due to ________ of hydrogen on its surface
Fill in the blank(s) with correct word
What error is made calculating the momentum of a particle moving at 0.80 c using classical mechanics rather than relativistic mechanics?
A. less than 1% B. the classical value is 67% too high C. the classical value is 67% too low D. the classical value is 40% too high E. the classical value is 40% too low