If a star system 30 parsecs distant is found to be broadcasting intelligent radio signals, then their news is already approximately ________ years old

A) 10 B) 30 C) 100 D) 300 E) 1,000


C

Physics & Space Science

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In science, the tendency of an experiment to produce a particular result is referred to as

A) a deviation B) bias C) an error D) an uncertainty

Physics & Space Science

Which of the following demonstrated the relation between the atomic number of a given element and the wavelength of the K-alpha x-ray photon emitted by that element?

a. Bohr b. Compton c. Moseley d. Pauli

Physics & Space Science

An attempt to remedy the difference in apparent solar days was the calculation of a

a. meridian day. b. 24-hour day. c. sidereal day. d. mean solar day.

Physics & Space Science

Proof that Earth revolves around the Sun is obtained by the use of ______________ and the ______________

Fill in the blank(s) with correct word

Physics & Space Science