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3 years ago

The process of conversion of solid into gas and again gas into solid is known as

Physics

1 answer:

pantera1 [17]3 years ago

6 0

Sublimation is when a solid becomes a gas. And gas to solid is deposition.

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Rotational speed refers to the number of complete _____ in a given amount of time.

pashok25 [27]

Answer:

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3 years ago

How many milliliters are in 1 liter?

posledela

1 litre = 1000 Milliliters is the answer

1 m^3 = 1000 litres

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3 years ago

Read 2 more answers

Solve the following quadratic equations:2x² - 4x - 9 = 0 x₊ = 1 + √22/2Answersx_ = 1 - √22/2

Pavel [41]

The root quadratic equation of $2x^{2} - 4x - 9 = 0$ is $x=\frac{2+\sqrt{22}}{2},\:x=\frac{2-\sqrt{22}}{2}$

What is the formula used to calculate the quadratic equation?

To solve the quadratic equation use the formula of $x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

Find the quadratic equation by using the formula ?

On comparing with $2x^{2} - 4x - 9 = 0$

We get , $a=2 , b=-4 , c=-9$

$D=b^{2} +7\\\\\\=(-4)^{2} +7*2*(-9)\\\\=-16-126\\\\=110$

By using the formula,

For a quadratic equation of the form $ax^2+bx+c=0$ the solutions are

$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

$X==\frac{-\left(-4\right)\pm \sqrt{\left(-4\right)^2-4\c* \:2\left(-9\right)}}{2\c* \:2}\\\\\sqrt{\left(-4\right)^2-4\cdot \:2\left(-9\right)}\\\\$

Apply rule,

$-(-a)=a\\\\=\sqrt{\left(-4\right)^2+4\cdot \:2\cdot \:9}\\\\$

Apply exponent rule,

$(-a)^{n} =a^{n}$ if n is even

$(-4)^{2} =4^{2}$

$\sqrt{4^2+4\cdot \:2\cdot \:9}$

Multiply the numbers :

$4*2*9=72\\\\\sqrt{4^2+4\cdot \:2\cdot \:9}\\\\4^{2} =16\\\\=\sqrt{16+72}\\\\$

Add the number $=\sqrt{88}$

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2 years ago

(1) A Newton is 1 kgm/s2 . Is this a fundamental unit or a derived unit?

Mrac [35]

A Newton is a derived unit.
Hope that helped:)

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3 years ago

A car battery seems to be malfunctioning (not providing the proper voltage and current to start your car). While the car is off

Stella [2.4K]

No. You cannot rule out the battery even after the open circuit voltage measurement. The open-circuit voltage may not have changed but the battery's internal resistance may have greatly increased.

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3 years ago