Response:
To find power, we must first determine the work done by the force.
1) We will use the following equation to calculate work:

The force is provided by the problem; our goal is to express 'dx' in terms of 't'
2) It's known that:

Thus, we have:

Then:

3) Finally, substituting all known values gives us:

After some calculations, the resulting work is:
161.9638 J.
4) To find power, we will use the following equation:

Thus
P = 161.9638/4.7 = 34.46 W
Answer:
A = 4.76 x 10⁻⁴ m²
Explanation:
Given data:
Person's weight = 625 N
Bike's weight = 98 N
Pressure per tire = 7.60 x 10⁵ Pa
Find: Contact area per tire
Total system weight = 625 + 98 = 723 N
Let F represent the force supported by each tire
2F = 723 N
Therefore, F = 361.5 N
Using the formula F = P × A


Contact area, A = 4.76 x 10⁻⁴ m²
To determine the average velocity of an object descending in a vacuum, assuming you know its final speed, multiply the final result by the overall time. 3. The equation d = v • t expresses how distance, average velocity, and time relate to each other.
Answer:
The cooker receives an average energy transfer rate of 1.80 kW.
Explanation:
Given that,
Pressure of the boiling water = 300 kPa
Mass of water = 3 kg
Duration = 30 min
Dryness fraction of the water = 0.5
What is the average energy transfer rate to the cooker?
We know that,
The specific enthalpy of vapor at 300 kPa is


We need to determine the initial state enthalpy of water


We must find the enthalpy of water in the final state
Using the enthalpy formula

Insert the value into the formula


Next, we calculate the energy transfer rate to the cooker
Using the energy rate formula

Substituting the value into the formula


Therefore, the average energy transfer rate to the cooker stands at 1.80 kW.