Why is it preferable to use Am in smoke detector?Low stable and highly reactive
High stability over long time and source need not be replaced
High penetration and high ionization
A good source of beta radiation and has a half-life of 432 years

Answers

Answer 1

Answer:

Answer:

Ionization smoke detectors use americium as a source of alpha particles. Alpha particles from the americium source ionize air molecules. This makes some particles positively charged and some negatively charged. ... Because of this shielding, the smoke detector poses no radiation health risk when they are properly handled.

Explanation:

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Related Questions

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In order for a plant to complete photosynthesis, all of the following need to be present except:Oxygen Sunlight Water Carbon Dioxide
Fluorine has 7 valence electrons. How many more electrons does it need to acheive a full outermost energy levela13ObOcO d102
Infrequent participation in physical activity can lead toa. high blood pressure during exerciseb. muscle strain and soreness after exercisec. extra calories burned during exercised. low heart rate after exercise
Which statement describes an alternate theory of acids and bases?(1) Acids and bases are both H+ acceptors.(2) Acids and bases are both H+ donors.(3) Acids are H+ acceptors, and bases are H+ donors.(4) Acids are H+ donors, and bases are H+ acceptors.

A substance whose shape can easily change is aa. solid.
b. powder.
c. fluid.
d. metal.

Answers

Answer:

The correct answer is the option:

c. fluid.

Explanation:

Hello!

Let's solve this!

A substance that can change its shape quickly is a fluid. Fluids have the property of adapting to the shape of the container that contains them. So you can easily change shape.

After the explanation, we conclude that the correct answer is the option:

c. fluid.

c. fluid
Fluids, like water for example, can quickly change shape and conform to their surroundings.

SI units are useful because they are all related by multiples of ____.

Answers

Answer:

SI units are useful because they are all related by multiples of 10.

Explanation:

International System of Units (abbreviated SI) is a system of measurement units, which is used almost everywhere in the world.

A unit system is a set of units of consistent, standard and uniform measurement. In other words, a unit system is a set of units (grouped and formally defined) that is used as a standard. Normally, in a system of units, few basic units are defined and from these several derived units are defined.

The International System of Units defines seven basic units, also called fundamental units, which define the corresponding fundamental physical quantities, chosen by convention, and which allow to express any physical quantity in terms or as a combination of them. The other units are obtained by combining the basic units.

The basic units of this system are:

Length-meter (m)
Mass-kilogram (kg)
Time- second (s)
Electric current intensity - ampere (A)
Temperature - Kelvin (K)
Amount of substance - mol (mol)
Light intensity - candela (cd)

The SI is based on the metric system, which is a system of units that are related to each other by multiples or submultiples of 10.

Then, SI units are useful because they are all related by multiples of 10.

SI units are useful as they are all related by multiples of 10.

Q(0,5) and R(2,1) are the endpoints of a line segment. What is the midpoint M of that line segment.

Answers

To find the midpoint M of a line segment with endpoints Q(0,5) and R(2,1), you can use the midpoint formula:

Midpoint M = ((x₁ + x₂) / 2, (y₁ + y₂) / 2)

In this formula:

- (x₁, y₁) are the coordinates of the first endpoint (Q in this case).

- (x₂, y₂) are the coordinates of the second endpoint (R in this case).

Plug in the values:

M = ((0 + 2) / 2, (5 + 1) / 2)

M = (2 / 2, 6 / 2)

M = (1, 3)

So, the midpoint M of the line segment with endpoints Q(0,5) and R(2,1) is (1, 3).

A _____ change occurs when a substance changes phase

Answers

when a substance changes phase it is called a PHYSICAL change

Answer:

It undergoes a physical change.

Explanation:

What is the simplest whole-number ratio of atoms in a molecule or formula unit called?

Answers

Answer: Empirical formula

Empirical formula referst to the simplest whole-number ration of atoms in a molecule. A compound's molecular formula can either be the same or multiple of its empirical formula. The structural and molecular formulas are also part of the compound formulas

Hi there! The simplest whole-number ratio of the atoms in a molecule of formula is called the Empirical formula.

The positively charged particle in an atom's nucleus is called the