A 5.00 Ω, a 10.0 Ω, and a 15.0 Ω resistor are connected in
series across a 90.0 V battery. What is the current in the
circuit?
a 5A
b
10 A.
с ЗА
d 8A

Option C) 3A

Explanation:

Given that,

Voltage = 90.0 Volts

Current I = ?

R1 = 5.0Ω

R2 = 10.0Ω

R3 = 15.0Ω

Since the resistors are connected in series, the total resistance (Rtotal) of the circuit is the sum of each resistance.

i.e Rtotal = R1 + R2 + R3

Rtotal = 5.0Ω + 10.0Ω + 15.0Ω = 30.0Ω

Then, apply the formula for ohms law

Voltage = Current x resistance

V = I x Rtotal

90.0V = I x 30.0Ω

I = 90.0V / 30.0Ω

I = 3 Amps (Amps is the unit of current)

Thus, the current in the circuit is 3 Amps

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answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.