The Great Dying occurred at the end of the ______________ era
Fill in the blank(s) with correct word
Paleozoic
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Three point charges, two positive and one negative, each having a magnitude of 20 ?C are placed at the vertices of an equilateral triangle (30 cm on a side). What is the magnitude of the electrostatic force on the negative charge?
a. 80 N b. 40 N c. 69 N d. 57 N e. 75 N
Any object moving towards or away from the Earth will show a Doppler shift when observed from Earth
Indicate whether the statement is true or false
Two spaceships, each 100 m long in its own rest frame, approach Earth from opposite directions, each with a speed 0.50c relative to Earth. As measured by a passenger in one of the spaceships, how long is the other spaceship?
A) 50 m B) 60 m C) 70 m D) 80 m E) 90 m
The spherical component is the __________
a. halo b. bulge c. halo and bulge d. dark matter