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3 years ago

The wave equation says that a waves ________ is equal to its wavelength times its frequancy

2 answers:

6 0

Even if we had no idea, we could get a clue by just looking at the units. The unit of wavelength is 'meters', and the unit of frequency is 'per second'. When you multiply them, the unit of their product is 'meters per second'. Well now, what could that be a unit of ? It kinda looks like speed. Oh yeahhh ! Wavelength times frequency is the SPEED of the wave !

balandron [24]3 years ago

5 0

Answer:

Speed APEX verified

Explanation:

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A problem solving method that involves trying all possible solutions until one works is using_____.

skad [1K]

Answer:

trial and error.

Explanation:

a problem solving method that involves trying all possible solutions until one works is using trail and error.

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3 years ago

Please help with number 2

Norma-Jean [14]

Number 2 is Classify

Hope this helps!

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3 years ago

A car has an initial velocity of +30.0 m/s and undergoes an acceleration of -5.00 m/s squared for 5.00 seconds what is the displ

Leni [432]

Ok so the formula is d=vi(t)+½at² and when you substitute it you should get 172.5meters

4 0

3 years ago

If the mass of a material is 99 grams and the volume of the material is 22 cm3, what would the density of the material be?

Kazeer [188]

You are asked to give the answer in g/cm3. So without knowing any single formulae you can just divide grams by cm3.

 $\frac{99 grams}{22 cm^{3} }$

= 4.5 g/cm3

7 0

3 years ago

When a fixed amount of ideal gas goes through an isobaric expansion A) its internal (thermal) energy does not change.B) the gas

Bingel [31]

<h2>Answer: its temperature must increase.</h2>

Explanation:

In an isobaric process the pressure remains constant, which means the initial pressure and the final pressure will be the same.

In addition, during this thermodynamic process, the volume of the ideal gas expands or contracts in such a way that the variation of pressure $\Delta P$ is neutralized.

Now, according to the First law of Thermodynamics that establishes the conservation of energy:

$\Delta U=\Delta Q-\Delta W$ (1)

Where:

$\Delta U$ is the internal energy

$\Delta Q$ is the heat transferred

$\Delta W$ is the work

Now, for an isobaric process:

$\Delta W=P\Delta V$ (2)

Where:

$P$ is the pressure (always positive)

$\Delta V$ is the volume variation of the gas

Here we have two possible results:

-If the gas expands (positive $\Delta V$ ), the work is positive.

-If the gas compresses (negative $\Delta V$ ), the work is negative.

In this case we are talking about the first result (work is positive).

Then, according to the above, equation (1) can be written as follows:

$\Delta U=\Delta Q - P\Delta V$ (3)

Clearing $\Delta Q$ :

$\Delta Q=\Delta U+P \Delta V$ (4)

Then, for an ideal gas in an isobaric process, part of the heat ( $Q$ ) added to the system will be used to do work (positive in this case) and the other part will increase the internal energy, hence the temperature will increase as well.

7 0

3 years ago