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iris [78.8K]
3 years ago
7

When a brick is dropped from the roof of a house, it lands on the ground with a speed v. What will the speed at ground level be

for an identical brick dropped from a roof twice as high as the first one?
Physics
1 answer:
Nina [5.8K]3 years ago
4 0
Twice as much by the first brick
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If you put positive energy and negative energy into a spiral tube like a corkscrew with a barrier so they could not meet, so the
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the mass of a brick is 4 kg, find the mass of water displaced by it when completely immersed in water.​
vova2212 [387]

Answer:

The correct answer is = 1.6

Explanation:

Density of water = 1000kg/m³ = d₁

Mass of brick = 4kg = m

Density of brick = 2.5 g/cm³ = 2.5 × 1000 =2500 kg/m³ = d₂

Volume of brick = m/d₂ = 4/2500 =16/10000 = 0.0016 L = v

Buoyant Force = v × d₁ × g          (g= acceleration due to gravity =9.8m/s²)

= 0.0016 × 1000 × 9.8 = 15.68 Newtons

By the Archimedes' Principle, the buoyant force is equal to the weight of the liquid displaced by an object.

Weight of the water displaced=Buoyant Force

=Mass of water displaced × g,

as weight = mass × acceleration due to gravity

15.68= mass of brick × 9.8

15.68/9.8 =Mass of water displaced

1.6 kg = Mass of water displaced

4 0
3 years ago
The position of a full moon is located
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The diffraction phenomenon is described by the expression

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let's use trigonometry

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we substitute

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now they tell us that we change the laser and we have y = 0.04 m for m = 2

      a 0.04 / L = 2  λ

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