3 years ago

After a flood, people should guard against

Physics

2 answers:

aniked [119]3 years ago

7 0

It is c because there can be many diseases.

tia_tia [17]3 years ago

6 0

C because of the effect floods have

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A force F~ = Fx ˆı + Fy ˆ acts on a particle that

Hatshy [7]

Answer:

W = 46 J

Explanation:

We need to find the angle between the two vectors Force vector and displacement vector.

First we will find the angle α of the force vector

$tan\alpha =\frac{1}{8} \\\\\\alpha =7.125 deg\\$

Then we find the angle β of the displacement vector

$tan\beta=\frac{2}{6} \\\\beta = 18.43 deg\\$

With these two angles we can find the angle between the two vectors

∅ = α + β = 25.56 deg

The definition of work is given by the expression

$W=F*d*cos (theta)$

The absolute value of F will be:

$F=\sqrt{8^{2}+1^{2} } \\F= 8.06 N$

The absolute value of d will be:

$d=\sqrt{(6 )^{2}+(2)^{2} } \\d= 6.32m\\$

Now we have:

$W=8.06*6.32*cos(25.56)\\W=46 J$

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3 years ago

Neptune is a planet that...

Ludmilka [50]

It would be option C. It rotates, or spins, on its axis, but it revolves around the sun.

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3 years ago

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When you slosh the water back and forth in a tub at just the right frequency, the water alternately rises and falls at each end,

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Slot in wwatwe to be determined for use

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3 years ago

A brick is released with no initial speed from the roof of a building and strikes the ground in 2.50 s, encountering no apprecia

Elenna [48]

Answer:A brick is released with no initial speed from the roof of a building and strikes the ground in 2.50 s, encountering no ..

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2 years ago

A Geiger counter registers a count rate of 8,000 counts per minute from a sample of a radioisotope. The count rate 24 minutes la

zmey [24]

11.54 minutes

Explanation:

The decay rate equation is given by

$N = N_0e^{-\frac{t}{\lambda}}$

where $\lambda$ is the half-life. We can rewrite this as

$\dfrac{N}{N_0} = e^{-\frac{t}{\lambda}}$

Taking the natural logarithm of both sides, we get

$\ln \left(\dfrac{N}{N_0}\right) = -\left(\dfrac{t}{\lambda}\right)$

Solving for $\lambda$ ,

$\lambda = -\dfrac{t}{\ln \left(\frac{N}{N_0}\right)}$

$\:\:\:\:= -\dfrac{(24\:\text{minutes})}{\ln \left(\frac{1000\:\text{counts/min}}{8000\:\text{counts/min}}\right)}$

$\:\:\:\:=11.54\:\text{minutes}$

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2 years ago