Answer:
Explanation:
Given parameters:
Average speed = 3.5miles per second
Unknown:
Initial speed = ?
Average speed = ?
Final speed in the interval = ?
Solution:
Since the bicyclist started from rest and speeds up steadily, it is correct to assume that her starting or initial speed is 0m/s.
At a state of rest, a body has no speed.
Average speed is the sum total of the speed covered at each time interval. This value is given already to be 3.5miles per second.
Final speed is the speed before the bicycle halts. This speed will be the same as the average speed here which is 3.5miles per second.
Speed is the rate of change of distance with time.
Answer:
The current is changing at the rate of 0.20 A/s
Explanation:
Given;
inductance of the inductor, L = 5.0-H
current in the inductor, I = 3.0 A
Energy stored in the inductor at the given instant, E = 3.0 J/s
The energy stored in inductor is given as;
E = ¹/₂LI²
E = ¹/₂(5)(3)²
E = 22.5 J/s
This energy is increased by 3.0 J/s
E = 22.5 J/s + 3.0 J/s = 25.5 J/s
Determine the new current at this given energy;
25.5 = ¹/₂LI²
25.5 = ¹/₂(5)(I²)
25.5 = 2.5I²
I² = 25.5 / 2.5
I² = 10.2
I = √10.2
I = 3.194 A/s
The rate at which the current is changing is the difference between the final current and the initial current in the inductor.
= 3.194 A/s - 3.0 A/s
= 0.194 A/s
≅0.20 A/s
Therefore, the current is changing at the rate of 0.20 A/s.
The displacement of Edward in the westerly direction is determined as 180.27 km.
<h3>Displacement of Edward</h3>
The displacement of Edward is calculated as follows;
R² = a² + b² - 2abcosθ
R² = 150² + 200² - 2(150 x 200) x cos60
R² = 32500
R = 180.27 km
Thus, the displacement of Edward in the westerly direction is determined as 180.27 km.
Learn more about displacement here: brainly.com/question/321442
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Answer:
1.
2.
Explanation:
Given that
f₁= 20 Hz
f₂= 20 KHz
C= 305 m/s
For open pie organ :
<u>Shortest length :</u><u>
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<u>Longest length :
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