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o-na [289]
3 years ago
8

Because of barriers and obstructions, you can see only a tiny fraction of a standing wave on a string. You do not know, for inst

ance, how long the string is. All you know is that the speed of waves on the string is 100 m/s and that the distance is 10 cm. Can you determine the frequency of the standing wave? 1. Sure, the frequency is 1000 Hz. 2. Sure, the frequency is 500 Hz.
Physics
2 answers:
gregori [183]3 years ago
6 0

Answer:

500 Hz

Explanation:

Given that,

speed of waves on the string is 100 m/s

distance is 10 cm

so given v is 100 m/s and L is 10 cm

frequency = speed (wave on string) / 2L

so the frequency is 100/2*10*10^-2m

= 1000/2

=500 Hz  

so the answer is 500 Hz

frequency = speed (wave on string) / 2L

so given v is 100 m/s and L is 10 cm  

so the frequency is 100/2*10*10^-2m

= 1000/2

=500 Hz  

so the answer is 500 Hz

chubhunter [2.5K]3 years ago
4 0

Answer:

(1) Sure, the frequency is 1000 Hz.

Explanation:

Frequency = wave speed ÷ wave distance

wave speed = 100 m/s

wave distance = 10 cm = 10/100 = 0.1 m

Frequency = 100 ÷ 0.1 = 1000 Hz

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When you take your 1900-kg car out for a spin, you go around a corner of radius 55 m with a speed of 15 m/s. The coefficient of
pentagon [3]

Answer:

7772.72N

Explanation:

When u draw your FBD, you realize you have 3 forces (ignore the force the car produces), gravity, normal force and static friction. You also realize that gravity and normal force are in our out of the page  (drawn with a frame of reference above the car). So that leaves you with static friction in the centripetal direction.

Now which direction is the static friction, assume that it is pointing inward so

Fc=Fs=mv²/r=1900*15²/55=427500/55=7772.72N

Since the car is not skidding we do not have kinetic friction so there can only be static friction. One reason we do not use μFn is because that is the formula for maximum static friction, and the problem does not state there is maximum static friction.

7 0
3 years ago
What is the acceleration of a 7 kg mass if the force of 70 N is used to move it toward the Earth?
Assoli18 [71]

Answer:

<h2>10 m/s²</h2>

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

a =  \frac{f}{m}  \\

m is the mass

f is the force

From the question we have

a =  \frac{70}{7}  = 10 \\

We have the final answer as

<h3>10 m/s²</h3>

Hope this helps you

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3 years ago
The mass number is determined by which particles?
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xenn [34]

Correct answer choice is :


C) The freezing and melting temperatures of a substance are the same.


Explanation:


Fluids have a particular temperature at which they convert into solids, identified as their freezing point. In theory, the melting point of a solid should be the same as the freezing point of the liquid. In practice, small variations among these measures can be seen. The freezing point of a matter is the same as that substance's melting point. At this distinct temperature, the substance can exist as either a solid or a liquid. At temperatures below the freezing/ melting point, the substance is a solid.


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