You're in a car that gets 28 miles per gallon of gas, driving it at a constant speed. if you took the gas from the car tank, and instead filled a long cylinder or hose alongside the car's path, what would the diameter of the hose need to be?

The diameter of the hose is 0.326 mm.

Explanation:

Given that,

Speed of car = 28 miles/galllon

We need to calculate the radius

The rate of flow of fluid is from the equation of continuity

Where, A = area of cross sectional

We know that,

The velocity is the ratio of displacement of gas per unit time.

Put the value into the formula

We need to calculate the diameter of the hose

Put the value of r

Hence, The diameter of the hose is 0.326 mm.

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27