Pl help it’s for a grade

Chemistry

2 answers:

Scrat [10]3 years ago

8 0

Answer:

Answer is A

Explanation:

I dont have an explanation

k0ka [10]3 years ago

7 0

I believe it’s number b because thats the only andwer that incorporates electromagnetic forces, and gives a solid reason

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When do you breathe faster? why do you think you breath faster during more vigorous activities?

Annette [7]

Explanation:

As well as bringing oxygen into the body more quickly, this speeds up the process of getting rid of carbon dioxide. <em><u>Your brain sends out instructions to your body to increase the rate of respiration.</u></em>

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4 years ago

7. The tendency of sound waves to bend when they pass from one medium to a different medium is known as A. refraction C. resonan

ahrayia [7]

The tendency of sound waves to bend when they pass from one medium to a different medium is known a refraction.

<h3>What is refraction ?</h3>

In diffraction, a sound wave is bent or stretched out in a single medium where the sound speed remains constant. Refraction is a crucial instance in which sound waves arc or diffuse. Due to variations in the wave's speed, a sound wave bends in this occurrence.

A wave bends as it travels along the edge of an object or through an aperture. It is referred to as diffraction. When a wave transitions from one medium to another at an angle, it also bends. It's known as refraction.

Thus, The option A is correct.

To learn more about refraction follow the link below;

brainly.com/question/2660868

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1 year ago

One method of favoring the formation of an ester is to add excess acetic acid. Suggest another method, involving the right-hand

Inessa [10]

Answer: decrease the temperature of the reaction

Explanation:

CH3COOH + CH3CH2OH ⇌ CH3COOCH2CH3 + H2O

The formation of an ester is an exothermic reaction. Therefore, a decrease in the temperature of the reaction will favour the production of ester.

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3 years ago

How does induced transmutation produce trans uranium elements ?

kifflom [539]

Answer: Artificial transmutation may occur in machinery that has enough energy to cause changes in the nuclear structure of the elements. This releases, on average, 3 neutrons and a large amount of energy. The released neutrons then cause fission of other uranium atoms, until all of the available uranium is exhausted.
Hope this helped!!
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4 years ago

Which polynomials, given in square inches, could represent the area of a square with whole number side lengths if x is a whole n

erica [24]

<u>Answer:</u> The correct answers are $x^2-9\text{ and }x^2-100$

<u>Explanation:</u>

To find the polynomials which could represent the are of a square having side x greater than 2, we need to find the value of 'x' for all the given polynomials.

From the given options: