What determines the chemical and physical properties of hydrocarbons?
A) the way the atoms are connected together
B) the number of carbon and hydrogens
C) the elements it is composed of
D) the number of oxygen
E) both A and B
Answer: E
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Photon Energy: Two sources emit beams of light of wavelength 550 nm. The light from source A has an intensity of 10 µW/m2, and the light from source B has an intensity of 20 µW/m2. This is all we know about the two beams. Which of the following statements about these beams are correct? (There could be more than one correct choice.)
A. Beam B carries twice as many photons per second as beam A. B. A photon in beam B has twice the energy of a photon in beam A. C. The frequency of the light in beam B is twice as great as the frequency of the light in beam A. D. A photon in beam B has the same energy as a photon in beam A. E. None of these statements are true.
A charge (uniform linear density = 9.0 nC/m) is distributed along the x axis from x = 0 to x = 3.0 m. Determine the magnitude of the electric field at a point on the x axis with x = 4.0 m
a. 81 N/C b. 74 N/C c. 61 N/C d. 88 N/C e. 20 N/C
What parts of the galaxy are considered to make up the "spherical component"?
What will be an ideal response?
The proper interpretation of a what a galaxy's redshift measures is ____
a. its motion in space toward the observer b. its motion in space away from the big bang c. the stretching of space between the galaxy and the observer d. the contraction of space between the galaxy and the observer e. the stretching of space between the galaxy and the big bang