Plants convert radiant energy from the Sun into chemical energy by a process called photosynthesis.
a. true
b. false
Answer: a. true
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Globular clusters are primarily found in the ____________________ component of the galaxy
Fill in the blank(s) with correct word
The pressure drop in a tube carrying a viscous fluid is described by
A) Bernoulli's principle. B) Pascal's principle. C) Archimedes' principle. D) Poiseuille's equation. E) Newton's Second law.
Three long, straight, parallel wires all lie in the yz plane and each carries a current of 20 A in the positive z direction. The two outer wires are each 4.0 cm from the center wire. What is the magnitude of the magnetic force on a 50-cm length of either of the outer wires?
a. 1.0 mN b. 0.50 mN c. 1.1 mN d. 1.5 mN e. 2.0 mN
A laser beam has a wavelength of 633 nm and a power of 0.500 mW spread uniformly over a circle 1.20 mm in diameter
This beam falls perpendicularly on a perfectly reflecting piece of paper having twice the diameter of the laser beam and a mass of 1.50 mg. (c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2) (a) What are the amplitudes of the electric and magnetic fields in this laser beam? (b) What acceleration does the laser beam give to the paper?