A resistor and capacitor are connected in series with an applied AC voltage source. Separate voltmeter readings across the resistor and capacitor give values of 23 V and 29 V (rms), respectively. What is the effective (rms) voltage of the source?
a. 7.2 V
b. 47 V
c. 37 V
d. 26 V
e. 18 V
c
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At the ultimate tensile strength,
(a) The true stress is at its maximum. (b) The specimen always fractures. (c) The maximum load-carrying capacity is experienced. (d) The material yields.
Which of the following is NOT true about vector images?
A. They are saved in a web-ready format. B. They are resolution-independent. C. You can create vector images using illustration software. D. They are created by combining shapes, curves, and lines.
Suppose a satellite orbits the earth so closely that it experiences some drag due to the earth’s upper atmosphere. This will drain away some of the orbital energy of this system, converting it to thermal energy. If this happens fairly slowly, the satellite’s orbit will remain nearly circular. What happens to the radius of this satellite’s orbit as time passes in this case?
A. It slowly decreases. B. It remains the same: just the satellite’s speed decreases. C. It slowly increases
Electromagnetic radiation of wavelength 2.5 cm is which type?
A) microwaves B) AM-radio C) visible D) FM-radio E) ultraviolet