Energy and Mass: According to the equation E = mc2, an object turns into energy when it reaches the speed of light.
A. True
B. False
Answer: B
Physics & Space Science
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Two identical nuclei of mass 18 u are made to unite to make a single nucleus of mass 36 u. What is the radius of the result of this fusion?
A) 4.5 fm B) 4.0 fm C) 6.3 fm D) 7.2 fm
Physics & Space Science
When an LCR series circuit is in resonance, its impedance is:
a. a maximum. c. zero. b. equal to its resistance. d. p/2 W.
Physics & Space Science
The focal length of a converging lens is 10 cm. What is the magnification of this lens if the image is viewed by a relaxed eye with a near point of 25 cm?
A) 0.5 B) 1.5 C) 2.5 D) 3.5 E) 4.5
Physics & Space Science
The Sun has apparent brightness at Earth (1.5 × 108 km away) of B. What would be the apparent brightness of the Sun at Pluto, which is 6.0 × 109 km from the Sun?
A) 0.50 B B) 0.25 B C) 0.063 B D) 0.025 B E) 0.00063 B
Physics & Space Science