Answer:
The frog takes 8 jumps to reach top of well
Explanation:
Given data
Frog at bottom=17 foot
Each time frog leaps 3 feet
Frog has not reached the top of the well, then the frog slides back 1 foot
To Find
Total number of leaps the frog needed to escape from well
Solution
in 1 jump distance jumped=3+(-1)
=2 feet
=2×1 feet
The "-1" is because the frog goes back
Now After 2 jumps the distance jumped as:
Distance Jumped=2+2
Distance Jumped=2*2
=4 feet
Similarly after 7 jumps
Distance Jumped=2+2+......+2
Distance Jumped=2*7
=14 feet
Now after 8th jump the frog climbs but doesnot slide back as it is reached to the top of well.
So
Distance Jumped=(Distance Jumped after 7 jumps)+3
=14+3
=17 feet
The frog takes 8 jumps to reach top of well
C.) The measuring unit of "Electrical Power" is "Watt"
Hope this helps!
Answer:
f1 = 58.3Hz, f2 = 175Hz, f3 = 291.6Hz
Explanation:
lets assume speed of sound is 350 m/s.
frequencies of a standing wave modes of an open-close tube of length L
fm = m(v/4L)
where m is 1,3,5,7......
and fm = mf1
where f1 = fundamental frequency
so therefore: f1 = 350 x 4 / 1.5
f1 = 58.3Hz
f2 = 3 x 58.3
f2 = 175Hz
f3 = 5 x 58.3
f3 = 291.6Hz
Answer:
The current is
The direction is anti-clockwise
Explanation:
The diagram for this question is shown on the first uploaded image
From the question we are told that
the length of the conducting rod is ![L = 25 \ cm = \frac{25}{100} = 2.5 \ m](https://tex.z-dn.net/?f=L%20%20%3D%2025%20%5C%20cm%20%3D%20%20%5Cfrac%7B25%7D%7B100%7D%20%20%3D%20%202.5%20%5C%20m)
The resistance is ![R = 8 \Omega](https://tex.z-dn.net/?f=R%20%3D%208%20%20%5COmega)
The magnetic field is ![B = 0.40\ T](https://tex.z-dn.net/?f=B%20%3D%200.40%5C%20T)
The speed of the rod is ![v = 6.0 m/s](https://tex.z-dn.net/?f=v%20%3D%206.0%20m%2Fs)
The emf induced is
substituting values we have
![\epsilon = 0.40 * 2.5 * 8](https://tex.z-dn.net/?f=%5Cepsilon%20%3D%200.40%20%2A%202.5%20%2A%208)
![\epsilon = 8V](https://tex.z-dn.net/?f=%5Cepsilon%20%3D%208V)
From ohm law the induced current would be
![I = \frac{\epsilon}{R }](https://tex.z-dn.net/?f=I%20%20%3D%20%20%5Cfrac%7B%5Cepsilon%7D%7BR%20%7D)
substituting values we have
![I = 1 A](https://tex.z-dn.net/?f=I%20%20%3D%20%201%20A)
The direction anticlockwise this because according to lenze law the current due to change in magnetic field will act in the opposite direction of the force causing the magnetic field to change
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