Most galaxies are members of some sort of cluster of galaxies
Indicate whether the statement is true or false
TRUE
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Pluto is no longer considered a planet
Indicate whether the statement is true or false
It takes 87 J of work to stretch an ideal spring from 1.4 m to 2.9 m from equilibrium. What is the value of the spring constant of this spring?
A) 27 N/m B) 77 N/m C) 52 N/m D) 39 N/m
Order the materials from smallest refractive index to largest refractive index.
=Air =Diamond =Glass =Quartz =Water
Two protons are fired toward each other in a particle accelerator, with only the electrostatic force being exerted. Which of the following statements must be true about them as they move closer together? (There could be more than one correct choice)
A) The electric potential energy of the system of the two protons keeps increasing. B) Their kinetic energy keeps increasing. C) The electric potential energy of the system of the two protons keeps decreasing. D) Their kinetic energy keeps decreasing. E) Their acceleration keeps decreasing.