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Ganezh [65]
3 years ago
9

Sinusoidal water waves are created 120 km offshore by an earthquake near a small island. observers in helicopters above the isla

nd report that the waves have an amplitude of about 2.0 m, a wavelength of 15 m, and a frequency of about 0.5 hz. how long do lifeguards on the mainland have to evacuate beaches before the waves arrive?

Physics
1 answer:
Helga [31]3 years ago
4 0
Should be about 1hr 13mins

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Andre listed some properties of electromagnetic waves.
ANEK [815]

Answer: Electromagnetic waves can transfer energy through empty space.

Explanation:

Electromagnetic waves are formed when an electric field comes in contact with a magnetic field. The electric field and magnetic field of an electromagnetic wave are perpendicular to each other. They are also perpendicular to the direction of the wave.

Electromagnetic waves travel with speed of light in vacuum.

Electromagnetic wave does not need a medium to propagate or travel from one place to another. Electromagnetic waves are 'transverse' waves which means that they are measured by their amplitude and wavelength.

Electromagnetic waves do not lose energy when they travel and thus can travel far from its source.

6 0
3 years ago
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A new mechanic foolishly connects an ammeter with 0.1 Ω resistance directly across a 12-V car battery with internal resistance o
NemiM [27]

Answer:

The power dissipated by the meter is 1188W

Explanation:

Here we have a circuit constituted with a power source and two resistors in series, we can calculate the power dissipated by the meter using the following formula:

P=I^2R_m

We first need to fin the current going through the circuit:

I=\frac{V}{R}\\where:\\V=voltage\\R=resistance

R=R_s+R_m

because they are connected in series. So:

I=\frac{12V}{(0.01+0.1)}=109A

P=(109)^2*0.1=1188W

8 0
3 years ago
Which transition by an electron will release the greatest amount of energy?
djyliett [7]

Answer:

A

Explanation:

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Answer:

Be serious or else CEO of brainly will kick you out

3 0
3 years ago
On isolated ground receptacles, the metal yoke ____ integrally bonded to the equipment grounding terminal of the receptacle.
Ede4ka [16]

On isolated ground receptacles, the metal yoke is not allowed to be integrally bonded to the equipment grounding terminal of the receptacle.

Any device with two distinct switches or receptacles is a duplex device. It can be shaped to fit a Decora opening or a typical duplex plate opening. It should be noted that they can be combination devices with a switch/outlet, switch/pilot light, etc.

Because of grounding connection removal and receptacle, it is utterly undesirable to connect the two bare equipment grounding conductors together directly.

The equipment grounding conductor associated with those circuits must be connected to the box when circuit conductors are terminated on equipment inside a metal box to prevent unneeded current discharge.

Learn more about  grounding conductors here brainly.com/question/14886979

#SPJ4.

4 0
2 years ago
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