Any rock having a very large mass would necessarily
A) be very difficult to accelerate.
B) move very slowly.
C) have a very large weight.
D) All of the above.
E) need to go on a diet.
A
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Uncertainty Principle Using Momentum and Position: An electron inside a hydrogen atom is confined to within a space of about 0.12 nm. What is the uncertainty in this electron's speed? (melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)
A. 3.1 × 105 m/s B. 4.8 m/s C. 3.1 km/s D. 9.6 × 105 m/s E. 4.8 × 106 m/s
Conservation of charge means that
a. The total amount of charge in the universe is constant. b. No experimenter has ever seen a single charge destroyed by itself. c. Electrons by themselves can be neither created nor destroyed. d. Charge can be neither created nor destroyed. e. All of the above.
If an electron is accelerated from rest through a potential difference of 9.9 kV, what is its resulting speed? (e = 1.60 × 10-19 C, k = 1/4??0 = 8.99 × 109 N • m2/C2, mel = 9.11 × 10-31 kg)
A) 5.9 × 107 m/s B) 4.9 × 107 m/s C) 3.9 × 107 m/s D) 2.9 × 107 m/s
A metal rod of length L in a region of space where a constant magnetic field points into the page rotates clockwise about an axis through its center at constant angular velocity ?. While it rotates, the point(s) at highest potential is(are)
a.
A.
b.
B.
c.
C.
d.
D.
e.
A and E.