Quasars are far enough away that we must take the relativistic redshift into account when calculating their age

Indicate whether the statement is true or false


TRUE

Physics & Space Science

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About 78% of the air is composed of

a)carbon dioxide. b)oxygen. c)nitrogen. d)argon.

Physics & Space Science

Passing arsenic contaminated water through a long pipe filled with sand and iron powder leads to removal of the arsenic by

A) a physical change. B) an oxidation-reduction reaction. C) ion exchange. D) filtering out the suspended arsenic particles. E) only a and b

Physics & Space Science

Household 120-V outlets are made to accept three-pronged plugs. One of the prongs attaches to the "live" wire at 120 V, and another attaches to the "neutral" wire that is connected to ground. What is the round third prong for?

a. It serves as a backup to the hot wire. b. It lets the appliance run if the neutral wire breaks. c. It connects the case of the appliance directly to ground for safety purposes. d. Nothing electrical, it is for mechanical sturdiness.

Physics & Space Science

For a wave with a constant speed, the greater the frequency of the wave, the ______________ its wavelength

Fill in the blank(s) with correct word

Physics & Space Science