The term ______________ refers to the way in which a mineral breaks into splinters, irregularly shaped pieces, or shell-shaped surfaces
Fill in the blank(s) with correct word
fracture
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Two point charges of magnitudes + 5.00 ?C, and + 7.00 ?C are placed along the x-axis at x = 0 cm and x = 100 cm, respectively
Where must a third charge be placed along the x-axis so that it does not experience any net force because of the other two charges? A) 4.58 cm B) 45.8 cm C) 50 cm D) 9.12 cm E) 91.2 cm
Solar neutrinos take a little more than eight hours to get from the Sun's core to Earth
Indicate whether the statement is true or false
At the point of fission, a nucleus of U-238, with 92 protons is divided into two smaller spheres each with 46 protons and a radius of 5.9 × 10^?15 m. What is the repulsive force pushing the two spheres apart when they are just touching one another? (The mass of the U-238 nucleus is 3.98 × 10^?25 kg.)
Which is a reason that we know dark energy is a major componentof the universe?
a) The universe would not be 2.7 degrees Kelvin today without dark energy. b) The gravity due to regular matter in the universe would have started it contractingagain by now without dark energy. c) Supernovae would not occur without dark energy. d) Dark energy is needed in order that light can escape from supermassive black holes. e) The universe is flat and regular matter doesn't contribute enough energy density.