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olga_2 [115]
2 years ago
9

What is the best description of a wave?

Physics
2 answers:
bagirrra123 [75]2 years ago
7 0
Is the first option (hope so)
scoundrel [369]2 years ago
5 0
I think it’s a pulse that carrie’s energy ??
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A person looks across a stadium at the scoreboard, which appears blurry. The person looks down at the program, which is complete
Pepsi [2]
Answer is D. Nearsightedness is when a person can see near, but not far. Everything appears blurry from far away, but as you get close to it, it becomes more focused
3 0
3 years ago
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A transformer connected to a 120-v(rms) at line is to supply 13,000V(rms) for a neon sign.
lyudmila [28]

Answer:

(a) 108

(b) 110.500 kW

(c) 920.84 A

Solution:

As per the question:

Voltage at primary, V_{p} = 120\ V          (rms voltage)

Voltage at secondary, V_{s} = 13000\ V  (rms voltage)

Current in the secondary, I_{s} = 8.50\ mA  

Now,

(a) The ratio of secondary to primary turns is given by the relation:

\frac{N_{s}}{N_{p}} = \frac{V_{s}}{V_{s}}

where

N_{p} = No. of turns in primary

N_{s} = No. of turns in secondary

\frac{N_{s}}{N_{p}} = \frac{13000}{120} ≈ 108

(b) The power supplied to the line is given by:

Power, P = V_{s}I_{s} = 13000\times 8.50 = 110.500\ kW

(c) The current rating that the fuse should have is given by:

\frac{V_{s}}{V_{p}} = \frac{I_{p}}{I_{s}}

\frac{13000}{120} = \frac{I_{p}}{8.50}

I_{p} = \frac{13000}{120}\times 8.50 = 920.84\ A

 

6 0
3 years ago
5 ejemplos de ondas mecánicas PORFAVOR!!
kupik [55]

Answer: Una onda de sonido es un ejemplo de onda mecánica. Las ondas sonoras son incapaces de viajar a través del vacío. Las ondas furtivas, las ondas del agua, las ondas de los estadios y las ondas para saltar la cuerda son otros ejemplos de ondas mecánicas; cada uno requiere algún medio para existir.

English Translation: A sound wave is an example of a mechanical wave. Sound waves are incapable of traveling through a vacuum. Slinky waves, water waves, stadium waves, and jump rope waves are other examples of mechanical waves; each requires some medium in order to exist.

Explanation:

6 0
2 years ago
The potential (relative to infinity) at the midpoint of a square is 3.0 V when a point charge of Q is located at one of the corn
tester [92]

Answer:

12.0 V

Explanation:

Data :

Potential difference due to a single charge (+Q), E = 3.0 V

 

The Electric potential for the system of charges is given as:

E=\frac{1}{4\pi \epsilon_o}[\Sigma\frac{Q}{r}]

for single charge, E = 3.0 V = \frac{1}{4\pi \epsilon_o}[\frac{Q}{r}]  ->eq(1)

And for 4 charges:

E=\frac{1}{4\pi \epsilon_o}[4\frac{Q}{r}] -eq(2)

from eq(1) and (2) we have

E = 4 × 3.0 V = 12 V

5 0
3 years ago
If the velocity and frequency of a wave are both doubled, how does the wavelength change?
Sindrei [870]

The wavelength will remain unchanged.

Explanation:

The velocity v of a wave in terms of its wavelength \lambda and frequency \nu is

v = \lambda\nu (1)

so if we double both the velocity and the frequency, the equation above becomes

2v = \lambda(2\nu) (2)

Solving for the wavelength from Eqn(2), we get

\lambda = \dfrac{2v}{2\nu} = \dfrac{v}{\nu}

We would have gotten the same result had we used Eqn(1) instead.

5 0
2 years ago
Read 2 more answers
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