Ultraluminous radio sources associated with small visible-light objects are called _______________
Fill in the blank(s) with correct word
quasars
Physics & Space Science
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Power: A sand mover at a quarry lifts 2000 kg of sand per minute a vertical distance of 12 m. The sand is initially at rest and is discharged at the top of the sand mover with speed 5.0 m/s into a loading chute. What minimum power must be supplied to this machine?
A. 520 W B. 3.9 kW C. 6.7 kW D. 4.3 kW E. 1.1 kW
Physics & Space Science
The drift speed of electrons that compose current in a flashlight is about
A) the speed of sound waves in metal. B) the speed of light. C) 1000 cm/s. D) less than 1 cm/s. E) any of the above under different conditions.
Physics & Space Science
A general name for an intrusive igneous rock formation is ______________
Fill in the blank(s) with correct word
Physics & Space Science
Discuss the crystalline structure of minerals
Physics & Space Science