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Zina [86]
2 years ago
14

Please help me with this question ​

Physics
1 answer:
mariarad [96]2 years ago
5 0

Answer:

Please help me with this question Please help me with this questionPlease help me with this question Please help me with this question Please help me with this question Please help me with this question Please help me with this question Please help me with this questionPlease help me with this question

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How much force is needed to stop a 90-kg soccer player if he decelerates at 15 m/s^2?
svet-max [94.6K]
We have: F = m×a
Here, m = 90 Kg
a = 15 m/s²

Substitute their values into the expression:
F = 90 × 15
F = 1350 N

In short, Your Answer would be Option D

Hope this helps!
8 0
4 years ago
Friction occurs when the ____ and ____ of two surfaces grind against each other.
monitta

Friction occurs when the surfaces and heat of two surfaces grind against each other.

I think these are the answers

7 0
3 years ago
Consider your knowledge and experience about caring for children. What have you observed about the needs, behaviors, and abiliti
Advocard [28]
They all have a special way in their age how they want to get taught things but there abilities make them special
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3 years ago
A pin fin of uniform, cross-sectional area is fabricated of an aluminum alloy (k = 160 W/m-K). The fin diameter is D = 4 mm, and
frozen [14]

Answer:

Given that

D= 4 mm

K = 160 W/m-K

h=h = 220 W/m²-K

ηf = 0.65

We know that

m=\sqrt{\dfrac{hP}{KA}}

For circular fin

m=\sqrt{\dfrac{4h}{KD}}

m=\sqrt{\dfrac{4\times 220}{160\times 0.004}}

m = 37.08

\eta_f=\dfrac{tanhmL}{mL}

0.65=\dfrac{tanh37.08L}{37.08L}

By solving above equation we get

L= 36.18 mm

The effectiveness for circular fin given as

\varepsilon =\dfrac{2\ tanhmL}{\sqrt{\dfrac{hD}{K}}}

\varepsilon =\dfrac{2\ tanh(37.08\times 0.03618)}{\sqrt{\dfrac{220\times 0.004}{160}}}

ε = 23.52

5 0
3 years ago
Read 2 more answers
When mantle rocks near the radioactive core are heated, they become less dense than the cooler, upper mantle rocks. These warmer
avanturin [10]
C.convection cells is the right answer
4 0
3 years ago
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