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borishaifa [10]
3 years ago
11

PLEASE HELP I WILL GIVE MAX POINTS

Physics
2 answers:
KatRina [158]3 years ago
8 0

Collect the water sample in a glass tumbler and then put a straw in the water. Record the bending in the straw using a protractor and the angle is the answer required

Finger [1]3 years ago
4 0

you can collect water and shine a light though it and record your finings

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How loudness of a sound wave depends on the intensity of the sound wave?
Anestetic [448]
Loudness of a sound wave is directly proportional to the intensity of the sound wave. In other words, when one increases, other also increases and vice-versa

Hope this helps!
3 0
3 years ago
If we warm a volume of air, it expands. Does it then follow that if we expand a volume of air, it warms? Explain.
Ivahew [28]

Answer:

nope don't think so

Explanation:

the heat causes the molecules to move faster therefore expanding in watever it the air is in

3 0
3 years ago
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A ball is let go and falls to the ground. It bounces a few times before
Ksenya-84 [330]

Answer:

I just want the points but you should pay attention in class jk

4 0
3 years ago
The cheetahs in Kenya and the cheetahs in Tanzania make up separate _____.
Andreyy89
C. Populations. 
  Hope that's right. 
6 0
3 years ago
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A wheel of mass 4kg is pulled up a plane inclined at 30° to the horizontal by a force of 45N applied to the axle and parallel to
Len [333]

Answer:

v = 10 m/s

Explanation:

Let's assume the wheel does not slip as it accelerates.

Energy theory is more straightforward than kinematics in my opinion.

Work done on the wheel

W = Fd = 45(12) = 540 J

Some is converted to potential energy

PE = mgh = 4(9.8)12sin30 = 235.2 J

As there is no friction mentioned, the remainder is kinetic energy

KE = 540 - 235.2 = 304.8 J

KE = ½mv² + ½Iω²

ω = v/R

KE = ½mv² + ½I(v/R)² = ½(m + I/R²)v²

v = √(2KE / (m + I/R²))

v = √(2(304.8) / (4 + 0.5/0.5²)) = √101.6

v = 10.07968...

5 0
3 years ago
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