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3 years ago

9

PLS ANSWER FAST WILL GIVE BRAINLY!!!!!!!

2 answers:

myrzilka [38]3 years ago

5 0

Answer:

They will construct strong sea walls with the intent to protect the coastline and infrastructure that could be affected by erosion.

Explanation:

Ivahew [28]3 years ago

4 0

Answer:

the answer is the explaination

Explanation:

Present beach erosion prevention methods include sand dunes, vegetation, seawalls, sandbags, and sand fences. Based on the research conducted, it is evident that new ways to prevent erosion must be obtained. Each way that is currently used has extensive negative effects on beaches and their natural tendencies.

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A certain helium-neon laser pointer, emitting light with a wavelength of 632 nm, has a beam with an intensity of 825 W/m2 and a

BabaBlast [244]

Answer:

$N = 1.62 \times 10^{15}$

Explanation:

Energy of each photon is given as

$E = \frac{hc}{\lambda}$

here we will have

$\lambda = 632 nm$

now we will have

$E = \frac{(6.626\times 10^{-34})(3 \times 10^8)}{632 \times 10^{-9}}$

$E = 3.14 \times 10^{-19} J$

now let say there is N number of photons per second

so power due to photons is

$P = N(3.14 \times 10^{-19})$

now intensity is given as power received per unit area

so we have

$I = \frac{P}{A}$

$825 = \frac{N(3.14 \times 10^{-19})}{\pi (1.40 \times 10^{-3})^2}$

$825 = N(5.11 \times 10^{-14})$

$N = 1.62 \times 10^{15}$

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3 years ago

The solar system is estimated to be how old

weqwewe [10]

4.571 billion years

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4 years ago

What must be true for any endothermic reaction?

miskamm [114]

They have to be warm because of the word thermic which means heat

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3 years ago

Scientists must be impartial and not base their conclusions on ____. A. opinions B. models C. evidence D. experiments

shusha [124]

Scientists must be impartial and not base their conclusions on A. Opinions.

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3 years ago

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10. A pitcher in a professional baseball game throws a fastball, giving the baseball

Juli2301 [7.4K]

Answer: 40.2m/sec

Work: v=p/m= 5.83kg/0.145k=40.2cm/sec

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3 years ago