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4 years ago

several months after a forest is cut down, a nearby river becomes much muddier than ever before. Infer how the river changed

1 answer:

4 0

Well this is just my opinion but I think because all the plants were gone they cant stop mud from rolling into it. Also when it rains the trees wont suck up the water, that will make it over flow and release into the land or dirt on the outsides of it. Mixing those two gives mud and it can potentially flow back in the river in largeish masses causing the river to mix with the mud makinging it more muddy. Hope this helps :D

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A hovering mosquito is hit by a raindrop that is 50 times as massive and falling at 8.4 m/s, a typical raindrop speed. How fast

kenny6666 [7]

The final velocity after the collision is 8.2 m/s

Explanation:

We can solve this problem by using the law of conservation of momentum: in fact, if we consider the system to be isolated (=no external unbalanced forces), the total momentum of the raindrop+mosquito must be conserved before and after the collision.

If the collision is perfectly inelastic, moreover, the raindrop and the mosquito stick together and travel at the same velocity v after the collision.

Mathematically:

$p_i = p_f\\m_1 u_1 + m_2 u_2 = (m_1+m_2)v$

where:

$m_1$ is the mass of the first mosquito

$u_1 = 0$ is the initial velocity of the mosquito

$m_2 = 50 m_1$ is the mass of the raindrop

$u_2 = 8.4 m/s$ is the initial velocity of the raindrop

$v$ is the final combined velocity of the raindrop+mosquito

Re-arranging the equation and substituting, we find:

$m_1 u_1 + 50 m_1 u_2 = (m_1 + 50 m_1) v\\50 m_1 u_2 = 51 m_1 v\\50 u_2 = 51 v\\v=\frac{50}{51}u_2 = \frac{50}{51}(8.4)=8.2 m/s$

Learn more about momentum here:

brainly.com/question/7973509

brainly.com/question/6573742

brainly.com/question/2370982

brainly.com/question/9484203

#LearnwithBrainly

4 0

4 years ago

A wheel has a constant angular acceleration of 1.8 rad/s2. During a certain 4.0 s interval, it turns through an angle of 45 rad.

tankabanditka [31]

Answer:

4.25 s

Explanation:

Given:

angular acceleration'α'= 1.8 rad/s²

angle 'θ'= 45 rad

time 't'= 4s

initial angular velocity ' $w_{o}$ '=0 $rad^{-1}$

as we know that,

θ= $w_{1}$ t + $\frac{1}{2} \alpha t^{2}$

45 = 4 $w_{1}$ + (0.5 x 1.8 x 16)

45- 14.4 = 4 $w_{1}$

30.6 = 4 $w_{1}$

$w_{1}$ = 7.65 $rad^{-1}$

Next is to find t by using the equation

$w_{1}$ = $w_{o}$ + $\alpha t_{1}$

7.65= 0 + (1.8) $t_{1}$

$t_{1}$ = 7.65/1.8

$t_{1}$ = 4.25 s

Therefore, At the start of 4s interval the motion is at 4.25 second

7 0

4 years ago

I believe that our solar system formed by the same process as star formation. A huge cloud of dust and gas collapsed and condens

xz_007 [3.2K]

Nebular hypothesis.

Explanation:

The first version of the nebula hypothesis was proposed by Immanuel Kant and Pierre Laplace.
Today the hypothesis has been revised to fit into more current and update realities about how our solar system emerged.
The hypothesis is the widely accepted explanation to the origin and evolution of the solar system.
It suggests that the star and the planets that makes up the solar system were products of a huge cloud of dust called the nebular.
The nebular is a huge mass of interstellar dusts.
The cloud collapsed and condensed under gravitational pull of the materials.
A center core that resulted in the formation of our star, sun emerged and the rest of the particles formed our planet.

Learn more:

The sun energy brainly.com/question/1140127

#learnwithBrainly

4 0

4 years ago

Current always returns to the:

Arlecino [84]

Current always returns to the negative terminal.

<u>Explanation</u>:

Current flows from a positive to a negative terminal. It is due to the flow of negative electrons to positive side. The current flows from a high potential to a low potential. There is high concentration of electrons at the positive terminal and low concentration at the negative terminal. When the circuit is complete the electrons move from a high concentration to low concentration i.e; from positive terminal to negative terminal.

8 0

4 years ago

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I have always wondered if the saying it was hot enough to fry an egg on the sidewalk could 20 points be true. Please describe ho

ikadub [295]

Answer:

This is one of the hottest summers America has ever seen and Jeremiah Warren is taking advantage of the heat wave and doing a little cooking…in his car!

It was about 98 or 99 degrees in Texas, so Jeremiah thought he’d head outside to see if it was hot enough to actually cook food. He buttered up a frying pan on his dashboard and filled it with an egg, cookie dough, a hot dog and bacon (mmm…bacon!). He set up another frying pan on the sidewalk and a few hours later he came back for a mid-day snack.

Explanation:

4 0

3 years ago