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Mariulka [41]
3 years ago
15

El Niño occurs every 2 to 12 years. true false

Physics
2 answers:
wlad13 [49]3 years ago
8 0

yep this is true i took the test

Novosadov [1.4K]3 years ago
5 0
True
It is True I took the test
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Please Answer the question in the picture ASAP PLEASE
attashe74 [19]

Answer:

HERE IS YOUR ANSWER

Explanation:

PLEASE MARK MY ANSWER AS BRAINLIEST IF THE ANSWERS ARE CORRECT .

Beacuse of the loose connection of the wire .

Straight

5 0
3 years ago
Which phrase best describes the path of a light a wave
Vladimir79 [104]
I believe the answer you’re looking for is A. Spiraling around the source
4 0
3 years ago
The power of a red laser (λ = 630 nm) is 3.25 watts (abbreviated w, where 1 w = 1 j/s). how many photons per second does the las
lisabon 2012 [21]
The energy delivered by the laser in 1 second isE_t=Pt = (3.25 W)(1.0 s)=3.25 J
In order to find how many photons correspond to this energy, we must calculate the energy of a single photon.
Calling h the Planck constant, c the speed of light and \lambda=630 nm=630 \cdot 10^{-9}m the wavelength of the light, the energy of a single photon is given by
E=h \frac{c}{\lambda}=(6.6 \cdot 10^{-34} Js) \frac{3 \cdot 10^8 m/s}{630 \cdot 10^{-9}m}= 3.1 \cdot 10^{-19} J

So, the number of photons emitted by the laser in 1 second is equal to the total energy delivered by the laser divided by the energy of a single photon:
N= \frac{E_t}{E}= \frac{3.25 J}{3.1 \cdot 10^{-19} J} =1.0 \cdot 10^{19} photons
5 0
3 years ago
You can calculate an average ________ if you know both the total distance and the total time of the trip. *
Aloiza [94]

Answer:

speed

Explanation:

Given: an incomplete sentence

To fill: the blank

Solution:

Speed is not a vector quantity but a scalar quantity as it has magnitude but no direction.

Speed = Distance ÷ Time

You can calculate an <u>average</u> speed if you know both the total distance and the total time of the trip.

Average speed = Total distance ÷ Total time

5 0
3 years ago
Given the following frequencies, calculate the corresponding periods. a. 60 Hz b. 8 MHz c. 140 kHz d. 2.4 GHz
Ipatiy [6.2K]

The frequency can be defined as the inverse of the period, that is, it can be expressed as

T = \frac{1}{f}

Here,

T = Period

f = Frequency

For each value we only need to replace the value and do the calculation:

PART A)

T = \frac{1}{f}

T = \frac{1}{60Hz}

T = 0.0166s

PART B)

T = \frac{1}{f}

T = \frac{1}{8*10^6}

T = 1.25*10^{-7} s

PART C)

T = \frac{1}{f}

T = \frac{1}{140*10^{3}}

T = 7.14*10^{-6}s

PART D)

T = \frac{1}{f}

T = \frac{1}{2.4*10^{9}}

T = 4.166*10^{-10}s

6 0
3 years ago
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