We can find the average speed of the body by finding the total distance covered, and then dividing it by the total time of the motion.
The total distance covered is:
while the total time of the motion is
So, the average speed of the body is:
Answer:
option B. Limestone
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<em>Z</em><em>a</em><em>r</em><em>a</em><em>♡</em>
Answer:
1.) Current = 213.33A
2.) Potential difference = 3200 V
Explanation:
Given that
Number of electrons n = 4 x 10^21 electrons
Resistance R = 15 ohm
Time t = 3 s
From the definition of current ;
Current is the rate of flow of changes. That is,
Current I = Q/t
Where
Q = 4 × 10^21 × 1.6 × 10^-19
Q = 460C
Current I = 460/3
Current I = 213.33 A
Using Ohms law which state that
V = IR
Substitute the resistance R and current I into the formula above
Potential difference V = 213.3 × 15
Potential difference V = 3200 V
Answer:
Explanation:
Let's start finding the frequency heard by the bystander due to the moving car. We need to use Doppler effect here:
v is the speed of sound (v = 343 m/s)
So, we have:
Now, the beat frequency heard by the bystander is the combine of the frequencies, it means the difference between them. Therefore the equation is given by:
I hope it helps you!
-- If the person to whom you're explaining them is alongside you, then
you should adjust your walkiing rate to match his, so that he remains
within earshot for the duration, and receives the benefit of the complete
explanation.
-- If you're presenting the explanation on the phone, then your walking
rate doesn't matter. But you still must adjust it to avoid running out of
breath as you speak, and you must also maintain your own awareness
of your surroundings, so that your explanation is not inadvertently
truncated.
