Earth's average density is about _____
A) 5.5 g/cm3
B) 6.5 g/cm3
C) 7.5 g/cm3
D) 8.5 g/cm3
A
Physics & Space Science
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In a hydraulic-press operation, it is impossible for the
A) output displacement to exceed the input displacement. B) force output to exceed the force input. C) energy output to exceed the energy input. D) output piston's speed to exceed the input piston's speed. E) none of the above
Physics & Space Science
If the north poles of two bar magnets are brought close to each other, the magnets will
A) attract. B) repel.
Physics & Space Science
If you take 6 litres of air from the surface to 20 metres/66 feet, the volume will be __________ litres.
a. 1 b. 2 c. 3 d. 4
Physics & Space Science
Dispersing light from a hot, low-pressure gas gives a spectrum of the type known as (two words) ______________ ______________
Fill in the blank(s) with correct word
Physics & Space Science