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3 years ago

6

How much current is drawn by a computer with a resistance of 42Ω that is connected across a potential difference of 220 V?

2 answers:

Nat2105 [25]3 years ago

8 0

Answer:

5.2

Explanation:

because

$i \frac{v}{r}$

220÷42=5.23

Scrat [10]3 years ago

6 0

Answer:

5.2 amps

Explanation:

V = I*R

I = V/R

I = 220/42

I = 5.2 amps

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2 years ago

1. When the mass of the ice added to the cup increases, the amount of thermal energy needed to change the temperature of the ice

Paha777 [63]

1. When the mass of the ice added to the cup increases, the amount of thermal energy needed to change the temperature of the ice decreases or increases

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3 0

3 years ago

A rigid tank internal energy of fluid 800kJ. Fluid loses 500kJ of heat and padle wheel does 100kJ of work. Find final internal e

Nesterboy [21]

Answer:

U₂ = 400 KJ

Explanation:

Given that

Initial energy of the tank ,U₁= 800 KJ

Heat loses by fluid ,Q= - 500 KJ

Work done on the fluid ,W= - 100 KJ

Sign -

1.Heat rejected by system - negative

2.Heat gain by system - Positive

3.Work done by system = Positive

4.Work done on the system-Negative

Lets take final internal energy =U₂

We know that

Q= U₂ - U₁ + W

-500 = U₂ - 800 - 100

U₂ = -500 +900 KJ

U₂ = 400 KJ

Therefore the final internal energy = 400 KJ

6 0

3 years ago

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Fofino [41]

Answer:

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Bo = 3.266 x 10^-6 T

Explanation:

Given

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Power P = 1.0 mW

Solution

Radius of the beam r = D/2 = 0.5 mm = 0.0005 m

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5 0

4 years ago