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2 years ago

Please help!! Look at pic

Physics

1 answer:

kkurt [141]2 years ago

7 0

Answer:

Explanation:

Voltage and Current relation is given by V=IR
I=9A

R=4Ohm

V=IR
V=9x4=36Volts

Resistance = 4 Ohm

Current = 9 Ampere

Voltage = 36 Volts

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A gas engine that operates on a Brayton cycle has an efficiency of 0.25. On a cold day, the temperature of the air drawn into th

Gnom [1K]

Answer:

356K

Explanation:

use this formula for brayton cycle

∩=1-(Tin/Tout)

where

∩=efficiency

Tin= inlet temperature

Tout= outlet temperature

solving

Tout=Tin/(1-∩)

Tout=267K/(1-0.25)

Tout=356K

4 0

3 years ago

An air-gap, parallel plate capacitor with area A and gap width d is connected to a battery that maintains the plates at potentia

sergejj [24]

Answer:

The new potential energy decreases by the factor of 2 to the old potential energy.

Explanation:

Capacitance of a parallel plate capacitor is given by the relation :

C = (ε₀A)/d

Here ε₀ is vacuum permittivity, A is area of the capacitor plate and d is the distance between them.

Potential energy of the capacitor, U = $\frac{1}{2}CV^{2}$

Here V is the potential difference between the plates.

According to the problem, the distance between the plates get double but area remains same. So,

d₁ = 2d

Here d₁ is new distance between the plates.

Hence, new capacitance is :

C₁ = (ε₀A)/d₁ = (ε₀A)/2d = C/2

The capacitor have same potential difference that is V. Hence, the new potential energy is :

U₁ = $\frac{1}{2}C_{1} V^{2}$ = $\frac{1}{2}\frac{C}{2} V^{2}$

U₁ = U/2

$\frac{U_{1} }{U} = \frac{1}{2}$

7 0

3 years ago

The H-R diagram is based on what two criteria?

qaws [65]

The HR diagram is based on brightness and temperature. If you want, you can search up the diagram. Most people classify the sides as Good For You and Bad for you, the bottom would be taste great and taste awful, but the answer is most likely brightness and temperature. Hope this helps you. :)

4 0

3 years ago

Read 2 more answers

Speed is an important component of which of the following sports? A. tennis B. soccer C. swimming D. all of the above Please sel

sladkih [1.3K]

D. all of the above

Explanation:

The best answer from the choices is option D all of the above.

Speed is a key component aspect of almost all sport.

What is speed:

Speed is the rate of change of distance with time;

Speed = $\frac{distance}{time}$