Quasars have a(n) ____
a. extremely high blueshift
b. moderate blueshift
c. undetectable Doppler shift
d. moderate redshift
e. extremely high redshift
e
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When the voltage across a resistor is decreased by 50%, what happens to the power dissipated?
A. it increases by 50% B. it decreases by 50% C. it decreases by 25% D. it decreases by 71% E. it decreases by 75%
A circular loop (area = 0.20 m2) turns in a uniform magnetic field with B = 0.13 T. At an instant when the angle between the magnetic field and the normal to the plane of the loop is (?) rads and is decreasing at the rate of 0.50 rad/s, what is the magnitude of the emf induced in the loop?
A. zero B. 13 mV C. 26 mV D. 20 mV E. 18 mV
At higher altitudes it takes ________ time to bring water to a boil on a stove
A) more B) less C) the same
Starburst galaxies are invisible in the infrared range
Indicate whether the statement is true or false