Power: A resistor operated at 120 V dc is rated at 1.40 kW.(a) What is the normal operating current through the resistor?(b) What is the resistance of the resistor?
What will be an ideal response?
(a) 11.7 A (b) 10.3 ?
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A silicon monoxide (n = 1.45) film of 330 nm thickness is used to coat a glass camera lens (n = 1.56). What wavelength of light in the visible region (390 to 710 nm) will be most efficiently transmitted by this system? (1 nm = 10-9 m)
a. 522 nm c. 638 nm b. 492 nm d. 409 nm
Why is Jupiter the largest planet in the solar system?
A) Because that's just the way it happened. B) Being the oldest planetary core, it had more time than the other planets to accumulate enough gas around itself before solar winds blew interplanetary dust away. C) Due to a massive collision with another protoplanet. D) Because of its distance from the Sun, the gravitational attraction between it and the Sun is perfectly balanced so as to create a density that results in the largest size of any planet.
The resistance of an object is defined as
A) (length)/(resistivity)(cross-sectional area). B) (current)/(voltage). C) (voltage)/(current). D) (length)(resistivity)(cross-sectional area). E) (voltage)(current).
Elements that display some properties of both metals and nonmetals are called ______________
Fill in the blank(s) with correct word