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andrew-mc [135]
3 years ago
5

Which of the following would require the greatest number of calories?

Physics
1 answer:
disa [49]3 years ago
3 0

Answer:

Heating 100 g of water from 10◦C to 50◦C

Explanation:

m₁ ΔT₁ = 2000

m₂ ΔT₂ = 300

m₃ ΔT₃ = 4000

m₄ ΔT₄ = 70

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Explain the Series and parallel combinations of resistors with the help of its equation.
Anna71 [15]
In series combination, resister are connected end to end and current has a single path through the circuit but the potential difference varies across each resistor. Thus we can write as,
V = V1 + V2 + V3
according to Ohm's law V = IR So,
V1 = I R1, V2 = I R2, V3 = I R3
V = I R1 + I R2 + I R3
V = I(R1+R2+R3)
V =IRe
All the individual resistances become equal to the equivalent resistance.
or Re = R1 + R2 + R3......Rn
In parallel combination, each resistor'sone is connected to the positive terminal while the other end is connected to a negative terminal. The potential difference across each resistance is the same and the current passing through them is different.
V = V1 =V2=V3
I = I1+ I2+I3
Current throught each resistor will be:
I1= V/R1 , I2 = V/R2 = I3 = V/R3
I = V (1/R1+ 1/R2+1/R3)
In case of equivalent resistance I=V/Re
V/Re = V (1/R1+ 1/R2+1/R3)
So the equivalnet resistance is the sum of all resistances
1/Re = 1/R1+ 1/R2+1/R3
8 0
3 years ago
Describe the relationship between Mass & Acceleration (if you change one, what happens to the other):
Phoenix [80]

Answer:

As mass increase acceleration decrease so the relationship is opposite

7 0
3 years ago
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Which method is responsible for the transfer of heat in the atmosphere ?
k0ka [10]

Answer:

B

Explanation: Because conduction is when an object touches another object and convection happens with boiling water or the water cycle, the particles/water fall and rise.

4 0
3 years ago
A drowsy cat spots a flowerpot that sails first up and then down past an open window. The pot was in view for a total of 0.51 s,
Gelneren [198K]

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The 10.98 m/s speed at the top of the window allows it to rise another 10.98^2/(2g)= 6.15 m past the top of the window

8 0
3 years ago
The substances in the table are combined, and Substance 1 loses 40 calories of heat. How many calories of heat will Substance 2
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Over time, the substances will reach equilibrium, meaning the heat calories lost by Substance 1 will be gained by Substance 2. Therefore, Substance 2 will eventually gain 40 calories of heat.

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3 years ago
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