How many revolutions per second are needed for a centrifuge to produce an acceleration of 1 200g at a radius arm of 15.0 cm?
a. 0.0280 rev/s b. 44.6 rev/s
c. 14.2 rev/s d. 6.68 rev/s
b
Physics & Space Science
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What is the symbol for the element whose atoms have 92 protons each?
a. Nb b. U c. Zn d. None of these
Physics & Space Science
If the net force on an object is zero,
a. there must be no forces acting on the object b. the object must be at rest c. the object's acceleration must be zero d. there can be no friction acting on the object
Physics & Space Science
Potential: How much kinetic energy does a proton gain if it is accelerated, with no friction, through a potential difference of 1.00 V? The proton is 1836 times heavier than an electron, and e = 1.60 × 10-19 C.
A. 1836 eV B. 1.00 eV C. 1.60 × 10-19 eV D. 1.00 J E. 1836 J
Physics & Space Science
How many neutrons are in a 15C nucleus?
A. 7 B. 8 C. 6 D. 9
Physics & Space Science