A compact object with a mass of 4 solar masses must be a black hole

a. True
b. False
Indicate whether the statement is true or false


True

Physics & Space Science

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______________ is defined as the angular measurement, in degrees, east or west of the Greenwich, or prime, meridian

a. The equator b. The International Date Line c. Latitude d. Longitude

Physics & Space Science

A guitar is perfectly tuned. The tension on its strings is then increased. Which of the following is true?

A. The speed of sounds from the guitar is larger than before B. The frequencies of sounds from the guitar are higher than before C. The wavelengths of sounds from the guitar are longer than before D. The amplitudes of sounds from the guitar are larger

Physics & Space Science

Which particle in the free state is least stable?

a. electron c. photon b. neutron d. proton

Physics & Space Science

Most of the visible light from the sun originates in the photosphere

Indicate whether the statement is true or false

Physics & Space Science