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Zina [86]
3 years ago
12

Care este densitatea materialului din care se confectioneaza un cub de 5cm daca masa lui este de 0,975kg/m3?

Physics
2 answers:
ValentinkaMS [17]3 years ago
5 0

Answer:

i speak english not spanigh sorry :(

Explanation:

Temka [501]3 years ago
4 0

Answer:

dh bc2ied ci2ehbd1jhweknhew

Explanation:

hope this helped :)

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A penny is dropped from the top of a tower. It hits the ground below after 2.5 s. How tall was the tower?
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Answer:

C. 30.6m

Explanation:

To find the height of the tower, we are to use Newtons law of motion to solve this problem. Since the penny is falling from the top of the tower, it is acted by the acceleration due to gravity. The formula to be used is:

H=ut+\frac{1}{2}gt^2

Where H is the height of the tower, t is the time taken to hit the ground, u is the initial velocity and g is the acceleration due to gravity.

Given that, t = 2.5 s, g =9.8 m/s², u = 0 m/s (at the top of tower)

H=ut+\frac{1}{2}gt^2\\\\H=0(2.5)+ \frac{1}{2}(9.8)(2.5)^2\\\\H=30.6\ m

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3 years ago
A gas occupies a volume of 20 cubic meters at 9,000 pascals. If the pressure is lowered to 5,000 pascals, what volume will the g
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We need to consider no change in the temperature of gas (isothermal transformation)

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9.20=5.V_2\\
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V_2=\frac{180}{5}=36 \ m^3
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It is most accurate to say that body mass index (BMI) provides information about an individual's height-weight ratio. The correct answer is B.
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Two objects, A and B, each of mass o.22 kg, are moving at 0.34 m/s directly toward each other. What is the speed of Object A aft
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Theoretically, if the objects have the same mass and are moving towards each other at a speed of 0.34m s^{-1}, after a perfectly elastic collision, the object A is supposed to move with the same velocity in the opposite direction.
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