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3 years ago

What describes a change in velocity?

Chemistry

2 answers:

Oksi-84 [34.3K]3 years ago

7 0

Velocity is the displacement made per unit of time.

If direction or speed of the object change it causes change in velocity.

Acceleration is the term used for measuring the change of velocity. Acceleration is the change of velocity per unit of time.

siniylev [52]3 years ago

4 0

Acceleration can be described as changes in speed, changes in direction, or changes in both. Acceleration is a vector.

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Can someone help me please

lesantik [10]

It is an endothermic reaction because the products hAve more heat than the reactions so it was a gain of heat which makes the enthalpy Change positive !

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2 years ago

The heaviest commonly used United States coin is the half dollar, which has a mass of 11.340g. The lightest United States coin i

Kruka [31]

Answer:

13.6×10^3

Explanation:

11.340+2.268= 13.608

7 0

3 years ago

What season does the sourtther hempishere experience when it is away from the sun?

kakasveta [241]

I believe Winter is <span>your answer.</span>

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3 years ago

If 450 grams of dextrose are dissolved in 650ml Of water with a resultant volume of 1 liter what is the percent concentration (w

krek1111 [17]

Considering the definition of mass volume percentage, the percent concentration of dextrose is 45%.

<h3>Mass volume percentage</h3>

Mass volume percentage (% m/V) is a measure of concentration that indicates the number of grams of solute per 100 volume units of the solution. In other words, the volume percent of a component in the solution is defined as the ratio of the mass of the component to the volume of the solution, expressed as a percentage.

The mass volume percentage of a solution is determined by the following expression:

$Mass volume percentage=\frac{mass of solute}{volume of solution}x100$

<h3>Percent concentration in this case</h3>

In this case, you know:

mass of solute= 450 grams
volume of solution= 1 L= 1000 mL

Replacing in the definition of mass volume percentage:

$Mass volume percentage=\frac{450 grams}{1000 mL}x100$

Solving:

<u><em>mass volume percentage= 45%</em></u>

Finally, the percent concentration of dextrose is 45%.

Learn more about mass volume percentage:

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1 year ago

Steroids, which all share the same carbon-ring framework but differ in functional groups that are attached to the basic ring str

lawyer [7]

Answer:

Lipids.

Explanation:

Steroids are known as the type of lipid which consists of 4 rings of carbon atoms. All steroids have 1 five-sided carbon ring and a 3 six-sided carbon ring. They are works as a hormone in the body and secreted by the ovaries and testes.

Steroids differ in functional groups. When this functional group attached to the steroid ring it gives steroids with a different function. They are composed of largely carbon, and hydrogen atoms. They are insoluble in nature in water.

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2 years ago