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OlgaM077 [116]
3 years ago
15

Donna is leaming about the water cycle in school. She knows that runoff is water that flows over land surfaces,

Physics
1 answer:
77julia77 [94]3 years ago
7 0

Answer:

ummm imma need the picture bud

Explanation:

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which statement best describes what would happen if the number of wore coils in a electromagnavneg were increased
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3 years ago
If measurements of gas are 75 L and 300 kIlopascals and then the gas is measured is second time and found to be 50 L, describe w
Ann [662]

Answer:

The pressure must have increased in the process

Explanation:

The State Equation for gasses reads: P*V=n*R*T

where P is the gas' pressure, V its volume, n the number of moles of gas,  R the gas constant and T the temperature in degrees Kelvin.

If the temperature of the gas doesn't change in the described process, the right hand side of the equation stays the same. If that is the case, given that when the Volume of the gas diminishes from 75 liters to 50 liters, then the pressure must have increased to keep that product "P * V" constant:

P_i*V_i=P_f*V_f\\75 *300=50*X\\X=\frac{75*300}{50} =450

So the pressure must have gone up to 450 kilopascals.

3 0
3 years ago
Ideally, the resistance of an ammeter should be:
pav-90 [236]
Ideally the resistance should be ZERO
7 0
3 years ago
Please help
JulsSmile [24]

Answer:

D

Explanation:

because it is the only one that has something to do with heat keyword would be boiling

7 0
3 years ago
How much energy is required to heat 70 g of water at 20°C to boiling
choli [55]

Answer:

Q=23,430J

Explanation:

Hello,

In this case, since we compute the required energy via:

Q=mC\Delta T

Whereas m is the mass which here is 70 g, C the specific heat which for water is 4.184 J/(g°C) and ΔT is the temperature difference which is:

\Delta T=100-20=80\°C

Therefore, the energy turns out:

Q=70g*4.184\frac{J}{g\°C}*80\°C\\ \\Q=23,430J

Best regards.

3 0
3 years ago
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