Answer:
total length of the spiral is L is 5378.01 m
Explanation:
Given data:
Inner radius R1=2.5 cm
and outer radius R2= 5.8 cm.
the width of spiral winding is (d) =1.6 \mu m = 1.6x 10^{-6} m
the total length of the spiral is L is given as



= 5378.01 m
Answer:
10 minutes: 10 km
1 minute: 10 ÷ 10 = 1 km
the speed of the truck is 1km/min
Answer:
The average rate of energy transfer to the cooker is 1.80 kW.
Explanation:
Given that,
Pressure of boiled water = 300 kPa
Mass of water = 3 kg
Time = 30 min
Dryness friction of water = 0.5
Suppose, what is the average rate of energy transfer to the cooker?
We know that,
The specific enthalpy of evaporate at 300 kPa pressure


We need to calculate the enthalpy of water at initial state


We need to calculate the enthalpy of water at final state
Using formula of enthalpy

Put the value into the formula


We need to calculate the rate of energy transfer to the cooker
Using formula of rate of energy

Put the value into the formula


Hence, The average rate of energy transfer to the cooker is 1.80 kW.
An electric heater that carries a current of 13.5 A when operating at a voltage of 120V , will have the resistance of the heater as 8.89 ohm.
<h3>What is Ohm's law?</h3>
Ohm's law can be described as the law in physics that focus on how voltage or potential difference between two points is directly proportional to the current or electricity that is moving in the direction of the resistance.
An this is also directly proportional to the resistance of the circuit, hence it can be calculated using the Ohm's law is V=IR.
from V=IR
R=V/I
= 120/13.55
=8.89 ohm.
Therefore, electric heater that carries a current of 13.5 A when operating at a voltage of 120V , will have the resistance of the heater as 8.89 ohm.
Learn more about ohms law on:
brainly.com/question/231741
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