All radio telescopes are refracting telescopes
Indicate whether the statement is true or false
F
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Series/Parallel Circuits: If V = 20 V and the battery is ideal, what is the current through R3 in the figure?
A. 0.050 A B. 0.20 A C. 1.0 A D. 4.0 A
According to our theory of solar system formation, what three major changes occurred in the solar nebula as it shrank in size?
A) It got hotter, its rate of rotation increased, and it flattened into a disk. B) Its mass, temperature, and density all increased. C) It gained energy, it gained angular momentum, and it flattened into a disk. D) Its gas clumped up to form the terrestrial planets, nuclear fusion produced heavy elements to make the jovian planets, and central temperatures rose to more than a trillion Kelvin.
Two thin-walled concentric conducting spheres of radii 5.0 cm and 10 cm have a potential difference of 100 V between them. (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
(a) What is the capacitance of this combination? (b) What is the charge carried by each sphere? What will be an ideal response?
There are nine books in a stack, each with a weight of 6 N. The coefficient of friction between all the books is 0.3 as is the coefficient between the table and the bottom book. What horizontal push must I just exceed on the next to bottom book to start sliding the top eight books off the bottom one?
a. 1.80 N b. 14.4 N c. 48.0 N d. 16.2 N