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3 years ago

Most radiation exposure comes from

2 answers:

5 0

Most radiation exposure comes from natural sources. These so-called "natural sources" include Radon, Internal, Terrestrial, and Cosmic. Among that, Radon proves to be the largest source of radiation. Radon is a naturally occurring radioactive gas that comes from the breakdown of uranium.

Yuliya22 [10]3 years ago

3 0

Answer:

d. natural source

Explanation:

When energy is emitteds by a source and travels through a medium until it's absorbed by matter, radiation is occuring. We are exposed to radiation everyday, some sources of radiation are natural and other come from man-made elements. We are commonly exposed to Background radiation, from Earth itself (some minerals) and very few man-made objects. From this type of radiation comes the one we are the most exposed to emitted by Radon and Thoron (radioactive gases which are created when other naturally occurring elements undergo radioactive decay). This gases represent 37% of all the radiation we are commonly exposed to.

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On the basis of which characteristics jute is considerd as a natural fibre

klemol [59]

Answer:

Jute is obtained from Jute plant naturally that is why it is considered as a Natural Fibre. It seems golden in color.

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3 years ago

When cleaning a storage battery you can use a solution of water and ammonia or solution of water and

Anettt [7]

Water and baking soda can be used, too.

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3 years ago

According to Coulomb's law, the electrical force between two charged objects:A.is zero if they are opposite charges.B.increases

kondor19780726 [428]

Answer and explanation:

A correct option is an option (B).

The electrical force between two charges is given as,

$F=\frac{1}{4\pi\epsilon_0}\frac{q_1q_1}{r^2}$

The electrical force is directly proportional to the product of two charges. Thus Force will depend on two charges irrespective of their signs.

Option (A) is incorrect because if charges are opposite, the value of force will not be zero. It will be -ve.

Option (C) is incorrect because the force is directly proportional to the product of charges, it depends on the amount of charge.

Option (D) is also incorrect because the force in inversly proportional to the distance between two charges. Thus, if the distance between two charges is increased, the force between two charges will decrease.

Concllusion:

The correct option is option (B).

7 0

10 months ago

If the heat of fusion is 32.2 kj/mol, the amount of heat energy required to melt 5.67 grams of feo is

anzhelika [568]

The heat of fusion is the amount of energy required to change the state of one mole of substance from solid to liquid at constant temperature. Therefore, in order to determine the energy needed by a given mass of substance, we must first convert the mass into moles by using:
Moles = mass / Mr
Moles = 5.67 / 71.84
Moles = 0.079 mol

Energy = latent heat of fusion * moles
Energy = 32.2 * 0.079
Energy = 2.544 kJ = 2,544 J

3 0

3 years ago

51. If two cylinders of dissimilar geometry are connected together to form a closed hydrostatic system, why would one cylinder p

Ipatiy [6.2K]

Answer:

see that for the same pressure the displaced height in each cylinder is different because its diameter is different. Pascal's principle

Explanation:

The pressure on a system is given by the relations

P = ρ g h

P = F / A

where ρ is the density of the liquid, h the height and A the area

The expressions above we see that if for the same height the pressure is the same regardless of the shape of the cylinder.

With the second expression we see that if the system has a different area, the pressure is

P = $\frac{F_{1} }{A_{1} } = \frac{F_{2} }{A_{2} }$

where we use subscript 1 for one body and subscript 2 for the other body

F₁ = $\frac{A_{1} }{A_{2} } F_{2}$

The cylinder displacement is

V = A h

where V is the volume and h the height, in general the liquids are incompressible therefore the displaced volume is constant in the two bodies

V = A₁ h₁ = A₂ h₂

$\frac{A_{1} }{A_2} = \frac{h_2}{h_1}$

we substitute

F₁ = $\frac{h_2}{h_1}$ F2

From here we see that for the same pressure the displaced height in each cylinder is different because its diameter is different.

If the diameter is the same, the offset height is the same

7 0

2 years ago