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3 years ago

A(n) _______ can prevent some bacterial diseases

Physics

1 answer:

salantis [7]3 years ago

5 0

Answer: Vaccine

Explanation:

A vaccine is any preparation that can be produced from toxoids, attenuated bacteria and/or viruses or made by genetic engineering. Its function is to generate in the human body active and longlasting immunity against a specific disease by stimulating the production of antibodies that will then act protecting the person against future infections.

To understand it better:

Vaccines teach the human body how to defend itself when pathogenic microorganisms, such as viruses or bacteria, invade it. This is achieved by exposing the body to a safe and very small amount of viruses or bacteria that have been weakened or destroyed, so that the immune system recognizes it for what it is and destroys the infectious agent.

Hence:

<h3>A <u>vaccine</u> can prevent some bacterial diseases</h3>

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The smallest unit of an element that has all of the properties of the element is a/an

AysviL [449]

Answer:B

Explanation: an atom is the smallest particle of an element that can take part in a chemical reaction.

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3 years ago

2. An object with moment of inertia ????1 = 9.7 x 10−4 kg ∙ m2 rotates at a speed of 3.0 rev/s. A 20 g mass with moment of inert

svetoff [14.1K]

Answer:

2.85 rad/s

Explanation:

5 cm = 0.05 m

20 g = 0.02 kg

When dropping the 2nd object at a distance of 0.05 m from the center of mass, its corrected moments of inertia is:

$I_2 = 1.32\times10^{−6} + 0.02 * 0.05^2 = 0.513\times10^{-4} kgm^2$

So the total moment of inertia of the system of 2 objects after the drop is:

$I = I_1 + I_2 = 9.7\times10^{-4} + 0.513\times10^{-4} = 0.0010213 kgm^2$

From here we can apply the law of angular momentum conservation to calculate the post angular speed

$\omega_1 I_1 = \omega_2 I$

$\omega_2 = \omega_1 \frac{I_1}{I} = 3 \frac{9.7\times10^{-4}}{0.0010213} = 2.85 rad/s$

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3 years ago

In a car how does an air bag minimize the force acting on a person during a collision

Klio2033 [76]

It decreases the momentum in the car.

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4 years ago

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Which resistors in the circuit must always have the same current?

kakasveta [241]

Answer:

Resistors in series in the circuit must always have the same current

Explanation:

Resistors are said to be connected in series if they are connected one after another.

The total resistance in the circuit with resistors connected in series is equal to the sum of individual resistances.

Individual resistors in series do not get the total source voltage. Total source voltage divide among them.

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3 years ago

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salantis [7]

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3 years ago