The main sequence is luminosity class V

Indicate whether the statement is true or false


TRUE

Physics & Space Science

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Transfer of heat in the Earth's mantle is dominated by

A) radiation B) seismic waves C) convection D) conduction

Physics & Space Science

If an operatic aria lasts for 5.75 min, its length expressed in seconds is x s, where x is

A) less than 5.75. B) greater than 5.75.

Physics & Space Science

A 60-kg man is one fourth of the way up a 10-m ladder that is resting against a smooth, frictionless wall. If the ladder has a mass of 25 kg and it makes an angle of 60° with the ground, find the force of friction of the ground on the foot of the ladder

a. 1.4E+1 N b. 1.6E+2 N c. 2.4E+2 N d. 2.7E+2 N e. 4.2E+3 N

Physics & Space Science

Which of the following solutions is the most acidic?

A) a solution with a pH = 14 B) a solution with a pH = 12 C) a solution with a pH = 7 D) a solution with a pH = 13 E) All of the solutions are basic.

Physics & Space Science