A warm dust cloud in which stars are forming would be best observed with a(n) ________ telescope.
A. gamma-ray
B. infrared
C. optical (visible light)
D. radio
Answer: B
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The prefixes which are abbreviated f, d, and T represent which of the following?
a. 10-15, 102, and 1024
b. 10-30, 10-2, and 1024
c. 1?0-30, 10-1, and 10-2
d. 10-13, 102, and 1024
e. 10-15, 10-1, and 1012
Which of the following are not found on Venus?
a. volcanoes b. coronae c. rolling plains d. lobate scarps e. high atmospheric pressure
A circular loop of wire with a radius of 4.0 cm is in a uniform magnetic field of magnitude 0.060 T. The plane of the loop is perpendicular to the direction of the magnetic field. In a time interval of 0.50 s, the magnetic field changes to the opposite direction with a magnitude of 0.040 T. What is the magnitude of the average emf induced in the loop?
1.0.20 V 2.0.025 V 3.5.0 mV 4.1.0 mV 5.20 mV