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nlexa [21]
3 years ago
6

De ce nu putem masura o bandă​

Physics
2 answers:
icang [17]3 years ago
3 0
I don’t speak Spanish sorry but I wish I could help you
Marianna [84]3 years ago
3 0

Answer:

you cnat measure a band because they come in all shapes and sizes they can be streched or to wide.

Explanation: the only way which is sometimes innacurate is if you cut the rubber band and measure it but you still cant measure it

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A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 19.0 m/s when the
german

Answer: 4 s

Explanation:

Given

The ball leaves the hand of student with a speed of u=19\ m/s

When the hand is h=2.5\ m above the ground

Using the equation of motion we can write

h=ut+\dfrac{1}{2}at^2

Substitute the values

\Rightarrow 2.5=-19t+0.5\times 9.8t^2\\\Rightarrow 4.9t^2-19t-2.5=0\\\\\Rightarrow t=\dfrac{19\pm \sqrt{(-19)^2-4\times 4.9\times (-2.5)}}{2\times 19}\\\Rightarrow t=4.0049\quad [\text{Neglecting the negative value of }t]

Thus, the ball will take 4 s to hit the ground.

5 0
3 years ago
How do you think overpumping groudwater is related to the formation of sinkholes?
vladimir2022 [97]
Ground water keept the ground at a stable level when it is gone the cavern it was in has no support and is at risk of callaps
3 0
3 years ago
FREE POINTS!
san4es73 [151]

Answer:

Both conduction and convection require matter to transfer heat. ... Convection occurs when warmer areas of a liquid or gas rise to cooler areas in the liquid or gas. Cooler liquid or gas then takes the place of the warmer areas which have risen higher. This results in a continuous circulation pattern.

Explanation:

HOPE THIS HELPS!!!

4 0
3 years ago
Read 2 more answers
Imagine a 15 kg block moving with a velocity of 20 m/s to the left. Calculate the kinetic Energy of this block.
ivann1987 [24]

Answer:

3000 J

Explanation:

Kinetic energy is:

KE = ½ mv²

If m = 15 kg and v = -20 m/s:

KE = ½ (15 kg) (-20 m/s)²

KE = 3000 J

3 0
3 years ago
Please help. 8th grade science
Aneli [31]

Answer:

false

Explanation:

It doesn't the copper wire wouldn't even be pulled by the magnet at all and the electricity would stay inside of the the force of the copper wire

3 0
3 years ago
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