Kepler's third law of planetary motion states that:
A) orbital period is double the semi-major axis.
B) the planets move at constant speeds at all points in their orbits.
C) all the planets move around Earth in elliptical orbits.
D) orbital period and semi-major axis are related.
D
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Jack and Jill are both traveling straight north. Jack is walking at 4 mph, while Jill is riding a bicycle at 12 mph. Regarding their speeds and velocities:
A) they both have the same speed and the same velocity. B) they have different speeds and different velocities. C) they both have the same speed but different velocities. D) they have different speeds, but the same velocity. E) None of the above.
Spherical Mirrors: A stature that is 3.0 cm tall statue is 24 cm in front of a concave mirror. The magnitude of the radius of curvature of the mirror is 20 cm.(a) Is the image real or virtual?(b) How far is the image from the mirror?(c) Is the image upright or inverted?(d) How tall is the image?
What will be an ideal response?
Which of the following is FALSE?
a) Light, radio, ultraviolet, and gamma rays are all forms of electromagnetic radiation. b) Emission spectra are characterized by narrow, bright lines of different colors. c) An absorption spectrum appears as a continuous spectrum interrupted by a series ofdark lines. d) The energy of a photon is inversely proportional to the wavelength of the radiation. e) The wavelengths of the emission lines produced by an element are different from thewavelengths of an absorption line produced by the same element.
It is impossible for a star to have a negative apparent magnitude, such as -1
Indicate whether the statement is true or false