3 years ago

elements found in the same ______ have similar chemical properties. What should go in the blank? Row or column?

1 answer:

3 0

The answer is Column, however if you want to know the scientific word for it, it is also known as a group

(extra fact, a row is called a period)

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“A place where things are baked”

- the bakery?

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At takeoff, a commercial jet has a speed of 72 m/s. Its tires have a diameter of 0.89 m. Part (a) At how many rev/min are the ti

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Answer:

a) Revolutions per minute = 2.33

b) Centripetal acceleration = 11649.44 m/s²

Explanation:

a) Angular velocity is the ratio of linear velocity and radius.

Here linear velocity = 72 m/s

Radius, r = 0.89 x 0. 5 = 0.445 m

Angular velocity

$\omega =\frac{72}{0.445}=161.8rad/s$

Frequency

$f=\frac{2\pi}{\omega}=\frac{2\times \pi}{161.8}=0.0388rev/s=2.33rev/min$

Revolutions per minute = 2.33

b) Centripetal acceleration

$a=\frac{v^2}{r}$

Here linear velocity = 72 m/s

Radius, r = 0.445 m

Substituting

$a=\frac{72^2}{0.445}=11649.44m/s^2$

Centripetal acceleration = 11649.44m/s²

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What is the mass of an atom with six protons, seven neutrons, and eight electrons?

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Answer:

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The mass of an atom= number of protons + number of neutrons

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it begins to decrease it's altitude

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True or false the state of a medium helps determine the speed of sound passing through a medium

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True. If a medium such as H2O is in ice form, sound can not pass through it as well as if it were water or water vapor

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