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posledela
3 years ago
13

You toss a coin straight upward in a train which is moving at a constant velocity. If the air friction is negligible, the coin w

ill land (a) In front of you (b) behind you (c) on your hand (d) at either in front of you or behind you
Physics
1 answer:
grandymaker [24]3 years ago
6 0

Answer:

option (c)

Explanation:

As you toss the coin, it will land in your hand. It is because the coin has same horizontal velocity as you and as that of train. So the horizontal distance traveled by you and the coin remains same and thus it will land in your hand.

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Consider a long cylindrical charge distribution of radius R with a uniform charge density rho. Find the electric field at distan
ahrayia [7]

Answer: Ok, first lest see out problem.

It says it's a Long cylindrical charge distribution, So you can ignore the border effects on the ends of the cylinder.

Also by the gauss law we know that E¨*2*pi*r*L = Q/ε0

where Q is the total charge inside our gaussian surface, that will be a cylinder of radius r and heaight L.

So Q= rho*volume= pi*r*r*L*rho

so replacing : E = (1/2)*r*rho/ε0

you may ask, ¿why dont use R on the solution?

since you are calculating the field inside the cylinder, and the charge density is uniform inside of it, you don't see the charge that is outside, and in your calculation actuali doesn't matter how much charge is outside your gaussian surface, so R does not have an effect on the calculation.

R would matter if in the problem they give you the total charge of the cylinder, so when you only have the charge of a smaller r radius cylinder, you will have a relation between r and R that describes how much charge density you are enclosing.

3 0
3 years ago
Highest common factor of 12r and 10
Scilla [17]

I think the number 2, not sure

3 0
3 years ago
A guitar string has a linear density of 8.30 ✕ 10−4 kg/m and a length of 0.660 m. the tension in the string is 56.7 n. when the
Sedbober [7]
Ans: Beat Frequency = 1.97Hz

Explanation:
The fundamental frequency on a vibrating string is 

f =   \sqrt{ \frac{T}{4mL} }<span>  -- (A)</span>

<span>here, T=Tension in the string=56.7N,
L=Length of the string=0.66m,
m= mass = 8.3x10^-4kg/m * 0.66m = 5.48x10^-4kg </span>


Plug in the values in Equation (A)

<span>so </span>f = \sqrt{ \frac{56.7}{4*5.48*10^{-4}*0.66} }<span> = 197.97Hz </span>

<span>the beat frequency is the difference between these two frequencies, therefore:
Beat frequency = 197.97 - 196.0 = 1.97Hz
-i</span>
3 0
4 years ago
Read 2 more answers
Miswer
quester [9]

Answer: 4.0

Explanation:

5 0
3 years ago
Please help I need this fast
STALIN [3.7K]

Answer:

0 m/sec

Explanation:

b/c they were at rest and initial means at rest ,at rest means 0 HOPE THIS HELPS

8 0
3 years ago
Read 2 more answers
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