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3 years ago

WILL BE MARKED BRAINLIEST

Physics

2 answers:

tamaranim1 [39]3 years ago

8 0

Answer:

C. Electromagnetic waves are longitudinal waves

Explanation:

natulia [17]3 years ago

5 0

Answer:

the answer is c

Explanation:

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How is energy conserved in a transformation?

irina [24]

As the water plunges, its velocity increases. Its potential energy becomes kineticenergy. The law of conservation of energy states that when one form of energy istransformed to another, no energy is destroyed in the process. ... So the total amount of energy is the same before and after any transformation.

hope it helps

5 0

3 years ago

(eText prob. 4.25 with some values changed) Air enters a diffuser of a jet engine operating at steady state at 2.65 psia, 389◦R,

krek1111 [17]

Answer:

$V_2 = 45.44m/s$

Explanation:

We have to many data in different system, so we need transform everything to SI, that is

$P_1 = 2.65 Psi = 18.271 kPa\\T_1= 389\°R = 216 K\\V_1 = 869ft/s = 264m/s\\T_2 = 450\°R = 250K$

When we have all this values in SI apply a Energy Balance Equation,

$\dot{Q}_{cv}-\dot{W}_{cv}+\dot{m}[(h_1-h_2)+(\frac{V_1^2-V_2^2}{2})+g(z_1-z_2)]=0$

Solving for V_2

$V_2 = \sqrt{V_1^2+2(h_1-h_2)}$

From the table of gas properties we calculate for $T_1 = 216K$ and $T_2 = 250K$

$h_1 = 209.97+(219.97-209.97)(\frac{216-210}{220-210})$

$h_1 = 215.97kJ/kg$

For T_2;

$h_2 = 250.05kJ/kg$

Substituting in equation for V_2

$V_2 = \sqrt{V_1^2+2(h_1-h_2)}$

$V_2 = \sqrt{265^2+2(215.97-250.05)*10^3}\\V_2 = 45.44m/s$

4 0

3 years ago

According to Hess’s theory, what might happen if the magma under a mid-ocean ridge cools? The magnetic stripes might reverse dir

Margarita [4]

Answer:

The magnetic stripes might reverse direction. The deep-ocean trench might become deeper.

Explanation:

mark me brainliest! pls

5 0

3 years ago

Please reply to me.

inysia [295]

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➷ It would be C

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

6 0

4 years ago

Read 2 more answers

Which two aspects of sound go together?

Varvara68 [4.7K]

Which two aspects of sound go together?

Pitch and frequency

Pitch and frequency are two aspects of sound that go together. Pitch means Higness or Lowness of sound. Frequency is the measurement of the number of times that a repeated event occurs per unit of time...~

4 0

3 years ago

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