Answer the following statement(s) true (T) or false (F)
The earth’s equilibrium temperature depends on its radius
FALSE
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The Crab Nebula is a bright, long lasting supernova remnant that was made by a ________ supernova
Fill in the blank(s) with correct word
A solenoid 4.0 cm in radius and 4.0 m in length has 8000 uniformly spaced turns and carries a current of 5.0 A. Consider a plane circular surface (radius = 2.0 cm) located at the center of the solenoid with its axis coincident with the axis of the solenoid. What is the magnetic flux through this surface? (1 Wb = 1 T ? m2)
A. 63 ?Wb B. 16 ?Wb C. 0.25 mWb D. 10 ?Wb E. 5.0 ?Wb
Which of the following has the smallest albedo?
a. Water b. Polar ice c. Fresh snow d. Dry sand
When a 20-V emf is placed across two resistors in series, a current of 2.0 A is present in each of the resistors. When the same emf is placed across the same two resistors in parallel, the current through the emf is 10 A. What is the magnitude of the greater of the two resistances?
a. 7.2 ? b. 7.6 ? c. 6.9 ? d. 8.0 ? e. 2.8 ?