Physics question 19 hw 25 Science Assignment Help -

Physics question 19 hw 25 Science Assignment Help. Physics question 19 hw 25 Science Assignment Help.

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A beam of 4.5-MeV neutrons is directed at a 0.030-kg tissue sample. Each second, 1.5 × 10⁶ neutrons strike the sample. If the relative biological effectiveness of these neutrons is 7.0, what biologically equivalent dose (in rem) is received by the sample in 65 seconds?

Question 19 options:

1.6 rem

19 rem

0.55 rem

0.23 rem

33 rem

Physics question 19 hw 25 Science Assignment Help[supanova_question]

Physics question 13 hw 25 Science Assignment Help

What is the antiparticle of an electron?

Question 13 options:

β⁺

2)	electron (self)

π⁺

photon

ν⁺

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Physics question 16 hw 25 Science Assignment Help

Which one of the following statements concerning pions is true?

Question 16 options:

1)	They are stable particles.

2)	They are composed of three quarks.

3)	They belong to the lepton family.

4)	They interact with protons via the strong interaction.

5)	They only exist in two charge states.

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Physics question 17 hw 25 Science Assignment Help

Which one of the following quantities is not necessarily conserved in nuclear reactions?

Question 17 options:

1)	linear momentum

2)	number of protons and neutrons

3)	electric charge

4)	number of protons

5)	angular momentum

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Physics question 19 hw 25 Science Assignment Help

Question 19 options:

1.6 rem

19 rem

0.55 rem

0.23 rem

33 rem

[supanova_question]

Physics question 12 hw 25 Science Assignment Help

A radiologist absorbs 4.0 × 10^–5 J of radiation. Determine the absorbed dose if his mass is 74.0 kg.

Question 12 options:

1)	3.8 × 10^–7 Gy

2)	6.3 × 10^–7 Gy

3)	5.4 × 10^–7 Gy

4)	5.1 × 10^–7 Gy

5)	4.6 × 10^–7 Gy

Physics question 12 hw 25 Science Assignment Help[supanova_question]

Physics question 9 hw 25 Science Assignment Help

Which one of the following quantities is not a conserved quantity according to the laws of physics?

Question 9 options:

1)	nucleon number

2)	kinetic energy

3)	linear momentum

4)	electric charge

5)	angular momentum

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Physics question 8 hw 25 Science Assignment Help

Complete the following sentence: In a β⁺decay process, the emitted particle is

Question 8 options:

1)	a neutron.

a proton.

3)	a positron.

a photon.

5)	an electron.

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Physics question 10 hw 25 Science Assignment Help

What is the SI unit for activity?

Question 10 options:

1)	counts/min

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Physics question 11 hw 25 Science Assignment Help

Which one of the following statements concerning the standard cosmological model is false?

)

The Grand Unified Theory describes the universe immediately before and shortly after the Big Bang.
2.At 10^–43 s after the Big Bang, the gravitational force was distinguishable.
3.About 0.5 million years after the Big Bang, hydrogen and helium atoms formed
4.The first distinguishable particles after the Big Bang were quarks and leptons.
5. after the big bang all fundemental forces acted as one force

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Physics question 19 hw 25 Science Assignment Help