Suppose you are facing a tall makeup mirror on a vertical wall. Fluorescent tubes framing the mirror carry a clockwise electric current. What is the direction of the magnetic field created by that current at the center of the mirror?
1.left
2.right
3.horizontally toward you
4.horizontally away from you
5.no direction because the field has zero magnitude
4
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A 10.00-V battery is connected between two parallel metal plates 4.00 mm apart. What is the magnitude of the electric field between the plates?
a. 2.50 × 10^3 N/C b. 25.0 N/C c. 14.0 N/C d. 4.00 × 10^?6 N/C e. 2.90 × 10^3 N/C
An unbalanced force of 42 N is applied to a mass of 7.0 kg. What will be the resulting acceleration?
How do we know that there can only be insignificant amounts of dark matter in our solar system?
What will be an ideal response?
When you look at a single-slit diffraction pattern produced on a screen by light of a single wavelength, you see a bright central maximum and a number of maxima on either side, their intensity decreasing with distance from the central maximum. If the wavelength of the light is increased,
A. the pattern shrinks in size (central maximum less wide; other maxima in closer to it). B. the pattern increases in size (central maximum wider; other maxima farther from it). C. it does not affect the size of the pattern. D. the width of the central maximum increases, but the other maxima do not change in position or width. E. the width of the central maximum decreases, but the other maxima do not change in position or width.