What is the difference between distance and displacement? Give an example of a situation where distance and displacement both ha
1 answer:
You might be interested in
Answer:
The time taken is
Explanation:
From the question we are told that
The diameter of the egg is
The initial temperature of egg the
The temperature of the boiling water
The heat transfer coefficient is
The final temperature is
The thermal conductivity of water is
The diffusivity of the egg
Using one term approximation
We have the
The radius is Note that this radius is approximation to that of a real egg
Now we need to obtain the Biot number which help indicate the value of to use in the above equation
The Biot number is mathematically represented as
Substituting values
So for this value which greater than 0.1 the coefficient is
Substituting this into equation 1 we have
Taking natural log of both sides
The time required for the egg to be cooked is mathematically represented as
substituting value is
Answer:
The resultant velocity is <u>169.71 km/h at angle of 45° measured clockwise with the x-axis</u> or the east-west line.
Explanation:
Considering west direction along negative x-axis and north direction along positive y-axis
Given:
The car travels at a speed of 120 km/h in the west direction.
The car then travels at the same speed in the north direction.
Now, considering the given directions, the velocities are given as:
Velocity in west direction is,
Velocity in north direction is,
Now, since are perpendicular to each other, their resultant magnitude is given as:
Plug in the given values and solve for the magnitude of the resultant.This gives,
Let the angle made by the resultant be 'x' degree with the east-west line or the x-axis.
So, the direction is given as:
Therefore, the resultant velocity is 169.71 km/h at angle of 45° measured clockwise with the x-axis or the east-west line.
