According to the uncertainty principle, a particle such as an electron
A) must have uncertainties in position and velocity that remain smaller than a particular prescribed value.
B) has a precise position and a precise velocity, but the observer is unable to determine them.
C) does not have a precise position or a precise velocity.
D) can have arbitrarily small simultaneous uncertainties in both position and velocity, although neither uncertainty can be zero.
E) is entirely made of sausage.
C
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Suppose a certain type of atom had just 5 different energy levels. How many different frequencies could be emitted by a gas composed of atoms of this type?
A) 10 B) 4 C) 25 D) 5 E) an infinite number
The number of protons in a nucleus is the
a. mass number. b. neutron number. c. atomic number. d. isotope number. e. none of the above
The element helium was discovered by studying the sun's spectrum
Indicate whether the statement is true or false
A pair of like electric charges
1) repel each other, 2) attract each other, and a pair of like magnetic poles 3) repel each other. 4) attract each other.