A 0.10-?F capacitor is connected to a 120-V rms 60-Hz source. (a) What is its capacitive reactance? (b) What is the rms current to the capacitor? (c) If both the capacitance and the frequency were doubled, what would be the rms current?
What will be an ideal response?
(a) 27 kΩ (b) 4.5 mA (c) 18 mA
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If a person has a shiny nose, applying powder will remove the shine without reducing the amount of light reflecting from the nose. This is an example of
A. polarization. B. specular reflection. C. diffuse reflection. D. diffraction.
Briefly describe the modern theory of how our Moon formed
What will be an ideal response?
About what percent of Earth's surface is covered with water?
a. 70% b. 10% c. 50% d. 30%
What are the three key necessities for all life on Earth?
A) (1) nutrients, (2) energy, (3) liquid water B) (1) liquid water, (2) carbon, (3) oxygen C) (1) nutrients, (2) liquid water, (3) oxygen D) (1) DNA, (2) mutations, (3) liquid water E) (1) DNA, (2) liquid water, (3) oxygen