A 2.00 m by 3.00 m plate of aluminum has a mass of 324 kg. What is the thickness of the plate? (The density of aluminum is 2.70 × 10^3 kg/m3.)
2.00 cm
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What technology do astronomers use to search for extraterrestrial life?
a. space observatories b. radio telescopes c. refracting telescopes d. reflecting telescopes e. FM radio and televisions
A proton is accelerated from rest through 0.50 kV. It then enters a uniform magnetic field of 0.30 T that is oriented perpendicular to its direction of motion
(a) What is the radius of the path the proton follows in the magnetic field? (b) How long does it take the proton to make one complete circle in the magnetic field?.
Liquid metallic hydrogen is found in the interior(s) of
a. Uranus. b. Neptune. c. Uranus and Neptune. d. neither Uranus nor Neptune.
Transformers: The primary of an ideal transformer has 100 turns and its secondary has 200 turns. Neglecting frictional losses, if the power input to the primary is 100 W, we can expect the power output of the secondary to be
A. 50 W. B. 100 W. C. 200 W. D. none of the given answers.