The uncharged particle inside an atom is the
a. electron
b. proton
c. neutron
d. nucleus
e. none of the above
C
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Dimensional Analysis: When adding several quantities
A. the quantities can have any combination of units. B. the quantities must all have exactly the same units. C. the quantities must all be dimensionless.
The support force on a 30-kg dog sleeping on the floor is
A) less than 300 N. B) about 300 N. C) more than 300 N. D) nonexistent while asleep.
A 2.0-C charge moves with a velocity of (
) m/s and experiences a magnetic force of (
) N. The x component of the magnetic field is equal to zero. Determine the z component of the magnetic field.
A. ?3.0 T B. +3.0 T C. +5.0 T D. ?5.0 T E. +6.0 T
Which of these gases is least abundant in our atmosphere?
A) hydrogen B) nitrogen C) argon D) oxygen E) carbon dioxide