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Y_Kistochka [10]
3 years ago
14

how will resistance change when the voltage increases in an electric circuit if the current remains constant

Physics
1 answer:
Yakvenalex [24]3 years ago
3 0
V=IR
Potential Difference (v)= Current (A) * Resistance (Ω)
As V increases, R also increases.
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A refrigeration cycle has Qout = 1000 Btu and Wcycle = 300 Btu. Determine the coefficient of performance for the cycle.
DENIUS [597]

Answer:

The coefficient of performance for the cycle is 2.33.

Explanation:

Given that,

Output energy Q_{out}=1000\ Btu

Work done W_{cycle}=300\ Btu

We need to calculate the coefficient of performance

Using formula of  the coefficient of performance

COP=\dftrac{Q_{in}}{W_{cycle}}

We need to calculate the Q_{in}

W_{cycle}=Q_{out}-Q_{in}

Put the value into the formula

300=1000-Q_{in}

Q_{in}=300-1000

Q_{in}=700\ Btu

Now put the value of Q_{in} into the formula of COP

COP=\dfrac{700}{300}

COP=\dfrac{7}{3}=2.33

Hence, The coefficient of performance for the cycle is 2.33.

5 0
3 years ago
Which is an example of convection currents
Viefleur [7K]

Answer:

A radiator emitting warm air and drawing in cool air is an example of convection current

Explanation:

I am guessing you meant "A radiator emitting warm air and drawing in cool air'

8 0
2 years ago
Read 2 more answers
Infrared light of wavelength 2.5 µm illuminates a 0.20-mm-diameter hole. What is the angle of the first dark fringe in radians?
stepan [7]

Answer:

Θ=0.01525 rad

or

Θ=0.87°

Explanation:

Given data

wavelength λ=2.5 µm =2.5×10⁻⁶m

Diameter d=0.20 mm =0.20×10⁻³m

To find

Angle Θ in radians and degree

Solution

Circular apertures have first dark fringe at

Θ=(1.22λ)/d

Substitute the given values

So

Θ=[1.22(2.5×10⁻⁶m)]/0.20×10⁻³m

Θ=0.01525 rad

or

Θ=0.87°

6 0
3 years ago
An athelete runs some distance before taking a long jump because : give answer
insens350 [35]
Hi Pupil Here's your answer ::



➡➡➡➡➡➡➡➡➡➡➡➡➡

An Athelete run some distance before taking a long jump because by running the Athelete gives himself larger inertia of motion.


⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅


Hope this helps .....

3 0
3 years ago
If a tree falls in the woods and nobody is there to hear it, does it really make noise
marshall27 [118]
Ye sit does. But since people weren’t there to hear it, doesn’t mean that it didn’t make a sound.
4 0
3 years ago
Read 2 more answers
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