According to Kepler's laws the Sun is located at one of the foci of Earth's orbit.
Answer the following statement true (T) or false (F)
True
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A He-Ne laser, which produces light of wavelength 632.8 nm, is used to calibrate a diffraction grating. If the first-order maximum occurs at 20.5° from the central spot, what is the distance between the slits of the grating?
A) 0.905 µm B) 1.81 µm C) 2.20 µm D) 3.62 µm E) 4.52 µm
Telescopically, Jupiter is the most colorful and changeable of the planets
Indicate whether the statement is true or false
Two uniformly charged rods are positioned horizontally as shown. The top rod is positively charged and the bottom rod is negatively charged. The total electric field at the origin:
1.is zero.
2.has both a non-zero x component and a non-zero y component.
3.points totally in the +x direction.
4.points totally in the –x direction.
5.points totally in the +y direction
6.points totally in the –y direction.
7.points in a direction impossible to determine without doing a lot of math.
The switch is closed in the figure below. After a long time compared with the time constant of the circuit, what will the current be in the 2-V resistor?