A household circuit rated at 120 volts is protected by a fuse rated at 10 amps. What is the maximum number of 100 watt light bulbs which can be lit simultaneously in parallel in this circuit without blowing the fuse?
A. 12
B. 24
C. 20
D. 8
E. 4
Answer: D
Physics & Space Science
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The parallax of the star 75 Leo is 0.10 and its apparent visual magnitude is +5.18 . The absolute visual magnitude of 75 Leo is ____________________
Fill in the blank(s) with correct word
Physics & Space Science
If the volume of an object doubles with no change in mass, its density would be
A) half. B) double. C) unchanged.
Physics & Space Science
If a galaxy is receding from us at 0.10c. Use Hubble's law to estimate the distance to this galaxy if the Hubble constant is 22 km/s per million light-years. (c = 3.00 × 108 m/s, 1 ly = 9.461 × 1015 m, 1 y = 3.156 × 107 s)
A) 1.4 × 109 ly B) 1.4 × 107 Mly C) 6.6 × 105 Mly D) 2.2 Mly E) 6.6 × 105 ly
Physics & Space Science
Why does the value of Hubble's constant alone not tell us the fate of the universe?
What will be an ideal response?
Physics & Space Science