Which of these singly ionized atoms of the same speed will curve most in a magnetic field?
A) helium
B) iron
C) uranium
D) all the same
Answer: A
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A 2.00-m long uniform beam of mass 4.00 kg rests on a fulcrum that is 1.20 m from one end when a 3.00-kg mass rests on that end
and a 8.00-kg mass is placed at another location on the beam. How far from the end at which the 3.00-kg mass is placed is the location of the 8.00-kg mass? A) 1.45 m B) 1.75 m C) 1.35 m D) 1.55 m E) 1.65 m
At t = 0 the switch S is closed with the capacitor uncharged. If C = 30 ?F, ? = 50 V, and R = 10 k?, what is the potential difference across the capacitor when I = 2.0 mA?
a.
20 V
b.
15 V
c.
25 V
d.
30 V
e.
45 V
All the planets revolve around the Sun in the same direction, except for Venus and Uranus
Indicate whether the statement is true or false
A child is standing at the rim of a rotating disk holding a rock. The disk rotates freely without friction. If the rock is dropped at the instant shown, which of the indicated paths most nearly represents the path of the rock as seen from above the disk?