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irina [24]
3 years ago
12

15 POINTS PLEASE PLEASE HELP ME!!

Physics
1 answer:
abruzzese [7]3 years ago
3 0
I will not help you but i would surely take these points for answering this question but i lied.
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Pop up spring Lab
Nikitich [7]

Answer:

I honestly don't know but that thing looks cool lol

5 0
3 years ago
A glass falls off a shelf. How fast is the glass moving after 0.4 seconds?
tresset_1 [31]

On Earth, gravity increases the speed of a falling object by about 9.8 m/s
every second that it falls.

In 0.4 second, its speed increases by (0.4 x 9.8) = 3.92 m/s.

If it just rolled off of the shelf at the beginning of that 0.4 second, then it
started from zero speed, and its speed after 0.4 second is 3.92 m/s.

Its velocity is 3.92 m/s downward.


6 0
3 years ago
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The rate an object is moving relative to a reference point is its
natulia [17]

Velocity is an object's rate of change (usually over time) of its displacement.

5 0
3 years ago
A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks from the spotlight toward the building at a speed
mafiozo [28]

Answer:

0.6375 m/s

Explanation:

Let x be the distance of the man from the building

from the figure attached

initially the value of x=12

Given:

\frac{dx}{dt}=-1.7m/s

where the negative sign depicts that the distance of the man from the building is decreasing.

Now, Let The length of the shadow be = y

we have to calculate \frac{dy}{dt} when x=4

from the similar triangles

we have,

\frac{2}{12-x}=\frac{y}{12}    

or

y=\frac{24}{12-x}

Differentiating with respect to time 't' we get

\frac{dy}{dt}=-\frac{24}{12-x}^2\frac{-dx}{dt}

or

\frac{dy}{dt}=\frac{24}{12-x}^2\frac{dx}{dt}

Now for x = 4, and \frac{dx}{dt}=-1.7m/s  we have,

\frac{dy}{dt}=\frac{24}{12-4}^2\times (-1.7)

or

\frac{dy}{dt}=-0.6375m/s

<u>here, the negative sign depicts the decrease in length and in the question it is asked the decreasing rate  thus, the answer is </u><u>0.6375m/s</u>

4 0
3 years ago
HELP PLZZZZZ NOW!!!
Aneli [31]

Answer:Climatic processes affect the dynamics of Earth's ice sheets and glaciers, and along ... by abrupt events and by continuous reshaping of Earth's surface from surface ... Forecasting natural disasters, including the timing and size of earthquakes, the . Last, human activity has a profound impact on water resources, landscape

Explanation:

step by step

3 0
3 years ago
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