At least 50 percent of the stars in the Orion nebula are encircled by dense disks of gas and dust with more than enough mass to make planetary systems like ours

Indicate whether the statement is true or false


True

Physics & Space Science

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The strong nuclear force is the force that holds the protons and neutrons in the nucleus together

Based on the fact that atomic nuclei can be stable, briefly explain how you can conclude that the strong force must be even stronger than the electromagnetic force, at least over very short distances.

Physics & Space Science

A paint pigment that absorbs red light and gives off blue light

A) is fluorescent. B) is phosphorescent. C) is used in lasers. D) is polarized. E) doesn't exist.

Physics & Space Science

The number of cycles of a wave passing a point per unit time is the wave's __________

Fill in the blank(s) with correct word

Physics & Space Science

A geologist suspends a 0.30-kg stone on an ideal spring. In equilibrium the stone stretches the spring 2.0 cm downward

The stone is then pulled an additional distance of 1.0 cm down and released from rest. (a) Write down the equation for the vertical position y of the stone as a function of time t, using the cosine function. Take the origin at the equilibrium point of the stone, with the positive y direction upward. (b) How fast is the stone moving at a time equal to 1/3 of its period of motion?

Physics & Space Science