Four 8.0-W resistors are connected in parallel. What is their equivalent resistance?
a. 4.0 W
c. 2.0 W
b. 0.50 W
d. 32 W
C
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What was the "best" dark matter percentage?
A.) 40%. B.) 50%. C.) 60%. D.) 70%. E.) 80%.
An eagle, with a wingspread of 2.0 m, flies due North at 8.0 m/s in a region where the vertical component of the earth's magnetic field is 0.2 × 10-4 T
What emf would be developed between the eagle's wing tips? (It has been speculated that this phenomenon could play a role in the navigation of birds, but the effect is too small, in all likelihood.)
The speed of light in a material is 0.50c. What is the critical angle of a light ray at the interface between the material and a vacuum?
A) 30° B) 21° C) 24° D) 27°
Any successful model for the formation of the solar system must explain why the orbits of the planets have low eccentricities
Indicate whether the statement is true or false