3 years ago

Explain the advantages in having the meter officially

1 answer:

7 0

Answer:

Thermal expansion causes the bar to expand in length (also, thermal contraction causes the bar to shrink). Having the meter measured in this way allows for consistency and can be easily converted.

Explanation:

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When exposed to a radioactive source which emits 1.2-MeV gamma-rays, a particular material is found to have a half-value thickne

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Answer:E

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It is given that Energy of gamma ray is E=1.2 Mev

Shielding effect can be measured by measuring the fraction of gamma rays blocked by shield. If certain thickness will able to block half the radiation then to block 75% radiation we need to add same amount of thickness in order to block the remaining radiation.

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3 years ago

A proton is released such that its initical velocity is from right to left across this page. THe proton's path, however, is defl

eduard

Answer:

the magnetic field is leaving the sheet

Explanation:

The magnetic force is given by the expression

F = q v x B

where bold letters indicate vectors, the modulus of this expression is

F = q v B sin θ

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the thumb indicates the direction of the speed, in this case from right to left

the palm the direction of the force, in our case upwards

the fingers extended the direction of the magnetic field, this case after fixing the other two components it points out of the blade

In short the magnetic field is leaving the sheet

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