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3 years ago

A node is a point on a standing wave that has no displacement from the rest position. at the nodes, _____.

Physics

2 answers:

xeze [42]3 years ago

8 0

Answer:

There is complete destructive interference between the incoming and reflected waves

Explanation:

I did Gradpoint :)

nikdorinn [45]3 years ago

4 0

Nodes are points along the medium that appear to be standing still. They are points on a standing wave that has no displacement from the rest position.
Antinodes are the opposite of nodes. Those are points that undergo the maximum displacement.
At the nodes the destructive interference occurs . For example a crest of one wave meets a trough of a second wave , or a half-crest of one wave meets a half-trough of a second wave...

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The energy in the typical thunderstorm is about 1.4×1011j. a typical lightning flash transfers 30 c across a potential differenc

iragen [17]

780 seconds, or 13 minutes.

In the future, please use proper capitalization. There's a significant difference in the meaning between mV and MV. One of them indicated millivolts while the other indicates megavolts. For this problem, I'll make the following assumptions about the values presented. They are:
Total energy = 1.4x10^11 Joules (J)
Current per flash = 30 Columbs (C)
Potential difference = 30 Mega Volts (MV)

First, let's determine the power discharged by each bolt. That would be the current multiplied by the voltage, so
30 C * 30x10^6 V = 9x10^8 CV = 9x10^8 J

Now that we know how many joules are dissipated per flash, let's determine how flashes are needed.
1.4x10^11 / 9x10^8 = 1.56E+02 = 156

Since each flash takes 5 seconds, that means that it will take about 5 * 156 = 780 seconds which is about 780/60 = 13 minutes.

3 0

3 years ago

Suppose you run into a wall at 4.5 meters per second (about 10 mph). Let's say the wall brings you to a complete stop in 0.5 sec

STatiana [176]

Answer with Explanation:

We are given that

Initial velocity,u=4.5 m/s

Time=t =0.5 s

Final velocity=v=0m/s

We have to find the deceleration and estimate the force exerted by wall on you.

We know that

Acceleration= $\frac{v-u}{t}$

Using the formula

Acceleration= $a=\frac{0-4.5}{0.5}$

deceleration=a= $-9m/s^2$

We know that

Force =ma

Using the formula and suppose mass of my body=m=40 kg

The force exerted by wall on you

Force= $40\times (9)=360N$

3 0

3 years ago

an object on a planet has a mass of 243 Kg. what is the acceleration of the object, if the radius of the planet is 2.32 x 10^7m

Ksenya-84 [330]

Answer:

7.87x10^5m/s^2

Explanation:

3 0

3 years ago

1. How far did she travel in total?

Aloiza [94]

Why give the ecuación

6 0

3 years ago

A railroad car of mass 2.52 104 kg is moving with a speed of 3.86 m/s. It collides and couples with three other coupled railroad

aleksley [76]

Answer:

a) v = 2.4125 m / s , b) Em_{f} / Em₀ = 0.89

Explanation:

a) This is an inelastic crash problem, the system is made up of the four carriages, so the forces during the crash are internal and the moment is conserved

Initial

p₀ = m v₁ + 3 m v₂

Final

$p_{f}$ = (4 m) v

p₀ =p_{f}

m (v₁ + 3 v₂) = 4 m v

v = (v₁ +3 v₂) / 4

Let's calculate

v = (3.86 + 3 1.93) / 4

v = 2.4125 m / s

b) the initial mechanical energy is

Em₀ = K₁ + 3 K₂

Em₀ = ½ m v₁² + ½ 3m v₂²

The final mechanical energy

$Em_{f}$ = K

Em_{f} = ½ 4 m v²

The fraction of energy lost is

Em_{f} / Em₀ = ½ 4m v² / ½ m (v₁² +3 v₂²)

Em_{f} / Em₀ = 4 v₂ / (v₁² + 3 v₂²)

Em_{f} / Em₀ = 4 2.4125² / (3.86² + 3 1.93²)

Em_{f} / em₀ = 23.28 / 26.07

Em_{f} / Em₀ = 0.89

6 0

3 years ago