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3 years ago

What is the speed v of a wave traveling down such a wire if the wire is stretched to its breaking point?

Physics

1 answer:

Ilya [14]3 years ago

5 0

Answer:

v = 620.17 m/s

Explanation:

There are different formulas for calculating the speed of a wave. Based on the given parameters, the speed of the wave can be estimated as:

v = sqrt(breaking tensile strength/density)

Where:

The breaking tensile strength = 3*10^9 N/m^2

Density = 7800 kg/m^3

Therefore, we can estimate the speed of the wave as shown below:

v = sqrt(3*10^9/7800) = sqrt(384615.3846) = 620.17 m/s

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slader A transcontinental flight of 4890 km is scheduled to take 40 min longer westward than eastward. The airspeed of the airpl

11111nata11111 [884]

Answer:

$v_{s}=65.2km/h$

Explanation:

Given data

Flight distance S=4890 km

Time difference Δt=t₂-t₁=40 min

Air speed of plane=980 km/h

To find

Speed of jet stream

Solution

When moving in the same direction as the jet stream time taken as t₁=d/(v+vs),v is velocity of plane and vs is velocity of plane

While moving in opposite direction t₂=d/(v+vs)

$t_{2}-t_{1}=\frac{d}{(v-v_{s}) } - \frac{d}{(v+v_{s}) }\\t_{2}-t_{1}=\frac{d(v+v_{s})-d(v-v_{s})}{(v-v_{s})(v+v_{s})} \\t_{2}-t_{1}=\frac{2dv_{s}}{(v)^{2} -(v_{s})^{2} }\\0.666667h=\frac{2(4890km)v_{s}}{(980km/h)^{2} -(v_{s})^{2} }\\0.666667((980km/h)^{2} -(v_{s})^{2})=9780v_{s}\\640267-0.666667(v_{s})^{2}-9780v_{s}=0\\0.666667(v_{s})^{2}+9780v_{s}-640267=0$

Apply quadratic formula to solve for vs

$v_{s}=65.2km/h$

4 0

3 years ago

A turntable is spinning on a frictionless axle when a ball of putty is dropped onto it from above. The putty sticks to the turnt

andrezito [222]

Answer:

Yes

Explanation:

Gravity and forces form the axle (external forces) do not cause forces that tend to cause rotation around the turntable's axle.

8 0

3 years ago

A runner starts at point A, runs around a 1-mile track and finishes the run back at point A. Which of the following statements i

babymother [125]

I don’t see any statements

4 0

3 years ago

2.<br> A car has a mass of 1700 kg and is moving at a speed of 25 m/s. Find its momentum.

Whitepunk [10]

Answer:

42500 kg.m/s

Explanation:

Momentum = mass * velocity

Momentum = 1700* 25

Momentum = 42500 kg.m/s

5 0

3 years ago

How does velocity differ from speed? What changes in motion can result in a change in velocity?

olga55 [171]

-Velocity is the speed of any moving object in a given direction, whilst Speed is the rate of an object's ability to move.
-Velocity can change if the direction or time is changed, the basic equation of velocity is: v = d/t
v - velocity
d - distance
t - time
If one of these factors change, it affects the other.

Hope this answers the question!

4 0

3 years ago

Read 2 more answers