Which of the following is true about the speed of light? A. It depends on the wavelength
B. In a vacuum, it is a constant value that does not depend on the observer.
C. It is slowest in a vacuum unless an observer is moving towards the source.
D. In a vacuum, it varies depending on the color of the light.

Aregular polygon has angkes of size 150° each. how many side has the polygon

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?

The average density of the planet uranus is 1.27 103 kg/m3. the ratio of the mass of neptune to that of uranus is 1.19. the ratio of the radius of neptune to that of uranus is 0.969. find the average density of neptune.