Two lightbulbs both operate on 120 V. One has a power of 25 W and the other 100 W. Which lightbulb has higher resistance?
1.The dim 25-W lightbulb does.
2.The bright 100-W lightbulb does.
3.Both are the same.
1
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The Sun's surface seethes and churns with a bubbling pattern. Why?
A) We are seeing hot gas rising and cool gas falling due to the convection that occurs beneath the surface. B) The churning is an illusion created by varying radiation, as the gas on the Sun's surface is actually quite still. C) The churning gas is being stirred up by the strong solar wind. D) The Sun's surface is boiling.
Which of the following materials has the highest dielectric constant?
a. air b. Mylar c. paper d. Pyrex glass e. water
The electric field in a region of space is given by Ex = (3.0x) N/C, Ey = Ez = 0, where x is in m. Points A and B are on the x axis at xA = 3.0 m and xB = 5.0 m. Determine the potential difference VB ? VA
a. ?24 V b. +24 V c. ?18 V d. +30 V e. ?6.0 V
Batholiths are massive plutons formed from the intrusion of
A) andesitic magma. B) granitic magma. C) basaltic magma. D) all of these