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qwelly [4]
3 years ago
14

A goldfish is swimming at 3.20 cm/stoward the front wall of a rectangular aquarium. What is theapparent speed of the fish as mea

sured by an observer looking infrom outside the front wall of the tank? The index of refraction ofwater is 1.333
Physics
1 answer:
neonofarm [45]3 years ago
3 0

Answer:

0.024m/s

Explanation:

Firstly, we have to convert the 3.20cm/s to m/s which is done by dividing the 3.20 by 100. the answer gives 0.032m/s. Then using the formular v=c/n where v is the apparent speed, c = speed of object and n is the refractive index of medium.we can now solve using the above formular which is 0.032m/s/1.333 = 0.024m/s

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Choose the true statements about electric fields and forces. (Choose 3)
aleksley [76]

Answer:

The three best answers are:

Electric fields can be positive or negative  (depending on source)

Electric fields can attrace or repel objets         (assuming the object is charged)

Electric forces are strongest near the charged object       E ∝ 1 / R^2

3 0
2 years ago
a wire carries 15 A. You form it into a singleturn circular loop with magnetic field 80 µT at the loop center. What is the loop
solong [7]
Use the formula B(at the center)= (4 pi * 10^(-7) ) * I (current)   / ( 2 radius)
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3 0
3 years ago
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A roller coaster is travelling 1 m/s at the top of the track. At the bottom of the track, 5 seconds later, it is travelling 36 m
lidiya [134]

Answer:

7m/s²

Explanation:

Given parameters:

Velocity at the top = 1m/s

Velocity at the bottom  = 36m/s

Time  = 5s

Unknown:

Average acceleration = ?

Solution;

Acceleration is the rate of change of velocity with time. It is expressed as;

  A = \frac{v -u}{t}

v is the velocity at the top

u is the velocity at the bottom

t is the time taken

 Now, insert the parameters and solve;

  A = \frac{36 - 1}{5}   = 7m/s²

7 0
3 years ago
When the north pole of a magnet is moved towards the center of a loop of wire containing a galvanometer, the needle of the galva
andriy [413]

Answer:

Moving the magnet away from the center of the loop with its south pole facing the center of the loop.

Explanation:

Electromagnetic induction is due to a rapidly changing magnetic field, or loop area. The poles of the magnet induce current in the loop but in the opposite direction, depending on the direction of their relative motion. An approaching north pole will induce an anticlockwise current in the loop, while an approaching south pole will do the reverse. To get the galvanometer to flicker in the same direction as of that when the north pole was approaching, we move the magnet away from the center of the loop with its south pole facing the center of the loop.

6 0
3 years ago
Real quick, if the wavelength is longer the pitch of the sound will be lower and vise versa, correct?
Masteriza [31]
The answer is yes. If itbid longer it is lower. shorter me and higher
4 0
3 years ago
Read 2 more answers
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