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Black_prince [1.1K]
3 years ago
13

INQUIRY IS A TYPE OF SCIENCE PROMPTED BY A QUESTION TRUE OR FALSE

Physics
2 answers:
natulia [17]3 years ago
6 0

True. all science starts with a question  



slamgirl [31]3 years ago
4 0
The answer is clearly True
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A watermelon is dropped off of a 50 ft bridge, and it explodes upon impact with the ground. How fast was it traveling in mph upo
Drupady [299]

Answer: 56.72 ft/s

Explanation:

Ok, initially we only have potential energy, that is equal to:

U =m*g*h

where g is the gravitational acceleration, m the mass and h the height.

h = 50ft and g = 32.17 ft/s^2

when the watermelon is near the ground, all the potential energy is transformed into kinetic energy, and the kinetic energy can be written as:

K = (1/2)*m*v^2

where v is the velocity.

Then we have:

K = U

m*g*h = (m/2)*v^2

we solve it for v.

v = √(2g*h) = √(2*32.17*50) ft/s = 56.72 ft/s

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3 years ago
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Y-STR analysis. It is a DNA test used to compute and match with the possibility via lap.
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3 years ago
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Why is a magnet strongest at its poles ??
Softa [21]

Answer:

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this was written by me.

Explanation:

8 0
3 years ago
4. How much milk at 5° C needs to be added to 250 g of coffee at 90° C to make the coffee drinkable at 60° C?
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Answer:

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Explanation:

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3 years ago
A 2.50 kg ball is attached to a 3.00 m bar and swung in a vertical circle. If the ball does not leave the circular loop, what mi
dezoksy [38]

Answer:

5.42 m/s

Explanation:

At minimum speed, the tension in the bar will be 0 when the ball is at the top of the arc, so the only force is gravity pulling down.

Sum of forces towards the center of the circle:

∑F = ma

mg = m v²/r

v = √(gr)

v = √(9.8 m/s² × 3.00 m)

v = 5.42 m/s

6 0
3 years ago
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