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2 years ago

Integrated Science- 8th grade science

Physics

2 answers:

MakcuM [25]2 years ago

7 0

Answer:

I do believe it is A.

Explanation:

I hope this helps :)

nevsk [136]2 years ago

3 0

Answer:I believe it is A

Explanation: B just doesn't seem like something an 8th grader would be learning about, and I'm not sure about the other ones.

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What is the wavelength of a 2.50-kilohertz sound

Alexxx [7]

The formula v=fλ can be used here.

326=2500*λ

Note the 2500 as 2.5kHz is 2.5 thousand Hz.

λ = 326/2500
= 0.1304m = 0.130m

3 0

3 years ago

tyhe mass of an object is 117 g adding 1200j of heat will raise the temperture of the object by 12 celsius what is the specifc h

Sati [7]

Answer:

C 0.85 j/g*k

Explanation:

The specific heat capacity of a material is given by:

$C_s = \frac{Q}{m \Delta T}$

where

Q is the amount of heat supplied to the object

m is the mass of the object

$\Delta T$ is the increase in temperature of the object

For the object in this problem, we have

m = 117 g is the mass

Q = 1200 J is the heat supplied

$\Delta T=12^{\circ}$ is the increase in temperature

Substituting into the formula, we find the specific heat:

$C_s = \frac{1200 J}{(117 g)(12^{\circ})}=0.85 J/gC$

8 0

3 years ago

What component in a circuit does this symbol represent?

Andreas93 [3]

Answer:

The given symbol is of DC power source

Option A is incorrect because in ammeter a letter A is written inside a circle.

Similarly, Option B is incorrect because in voltmeter V is written inside a circle

Option C and D are incorrect

Option E is correct it is a DC power source.

It is a Dc power source the left hand side is positive side and the right line is the negative side.

5 0

3 years ago

Read 2 more answers

What does g mean in physics

o-na [289]

Answer:

Grams, I believe..! (Meter, liter, gram)

3 0

3 years ago

Read 2 more answers

An oxygen molecule is moving near the earth's surface. Another oxygen molecule is moving in the ionosphere (the uppermost part o

Elena-2011 [213]

Answer:

The ratio of the translational rms speed in the ionosphere to the translational rms near the earth's surface is $\sqrt 3 :1$

Explanation:

The relation between the translational rms speed and the temperature is given by :

$v_{rms}=\sqrt{\dfrac{3kT}{m}}$

So, $v_{rms}\propto \dfrac{1}{\sqrt{T} }$

When the temperature is three times greater.

$v'_{rms}=\dfrac{1}{3T}$

The ratio of the translational rms speed in the ionosphere to the translational rms near the earth's surface is :

$\dfrac{v_{rms}}{v'{rms}}=\dfrac{\sqrt 3}{1}$

Hence, this is the required solution.

7 0

3 years ago