PHYSICS QUIZ 7

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When a gamma ray is emitted by a nucleus, the nucleus then has less

energy

Which experiment best demonstrates the particle-like nature of light?

photoelectric effect

The mass of an atomic nucleon is nearly

two thousand times the mass of an electron.

In the equation E = hf, the f stands for

wave frequency as defined for sound, radio, and light waves.

An element will decay to an element with higher atomic number in the periodic table if it emits

a beta particle.

The fact that iron absorption lines occur in the solar spectrum directly indicates that there is iron in the solar

atmosphere.

In which of these processes is an element of matter changed into a completely different element?

both of these

Two photons are emitted as an electron de-excites from the third quantum level to the second, and then to the ground state. The sum of the frequencies of the two photons equals the frequency of the single photon that would be emitted if the de-excitation were from the third to the ground state directly. This is according to

both of these

Energy released by the sun results from the process wherein atomic nuclei

combine.

Carbon 14 is produced in the atmosphere principally by

cosmic-ray bombardment.

In the fissioning of uranium, a chain reaction is caused by

ejected neutrons.

When an element undergoes nuclear transmutation, the result is a completely different

element.

Discrete spectral lines occur when excitation takes place in a

gas.

When the hydrogen isotope tritium-3 emits a beta particle, it becomes an isotope of

helium.

When a lump of uranium is broken into smaller pieces, the total surface area of the lump

increases.

Uranium-235, uranium-238 and uranium-239 are different

isotopes.

The energy release in both fission and fusion is mainly in the form of

kinetic energy of fragments.

In nuclear fission and nuclear fusion reactions, the amount of mass converted to energy of other forms is

less than 1%.

In the process of fluorescence, the input is high-frequency light and the output is

lower-frequency light.

Compared to the energy produced by fissioning a gram of uranium, the energy produced by fusing a gram of deuterium is

more.

Compared to protons, the reason neutrons are effective nuclear bullets in nuclear reactions is that a neutron has

none of these

A nucleon has more mass when it is

outside the nucleus.

Atoms of neon in a glass tube can be excited

over and over again.

Two beams of light, a red beam and a blue beam, have the same energy. The beam with the greater number of photons is the

red beam.

As a solid is gradually heated, the first color to glow is

red.

To say that energy levels in an atom are discrete is to say the energy levels are well defined and

separate from one another.

The function of graphite in the first atomic reactor was to

slow fast neutrons.

When a beta particle is ejected from a nucleus, the nucleus then has slightly

smaller mass and significantly greater charge.


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