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Viefleur [7K]
3 years ago
9

Please help in desperate

Physics
1 answer:
Rom4ik [11]3 years ago
3 0

Answer:

D. 53°

Explanation:

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(b) A piece of wood of volume 0.6 m² floats in water. Find the volume
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Answer:

Explanation:

Let the volume below water be v . Then

buoyant force = v d g where d is density of water , g is acceleration due to gravity

= v x 1000 x g

weight of wood piece = volume x density of wood x g

= .6 x 600 x g

for equilibrium while floating

buoyant force = weight

= v x 1000 x g  =  .6 x 600 x g

v = .36 m²

volume above water or volume exposed = .6 - .36

= .24 m²

When immersed completely ,

buoyant force = .6 x 1000 x 9.8

= 5880 N

weight of wood

=  .6 x 600 x g

= 3528 N

buoyant force is more than the weight . In order to equalise them for floating with full volume in water

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3 years ago
Valence electron of the first 20 elements​
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Answer:

Hydrogen

1 valence electron

Helium

2 valence electrons

lithium

1 valence electrons

beryllium

2 valence electrons

boron

3 valence electrons

carbon

4 valence electrons

nitrogen

5 valence electrons

oxygen

6 valence electrons

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7 valence electrons

neon

8 valence electrons

sodium

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magnesium

2 valence electrons

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3 years ago
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A 70-kg astronaut is space walking outside the space capsuleand is stationary when the tether line breaks. As a means of returni
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Answer:

0.4 m/s

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b -4 N

may the force be with you

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Answer:

b

Explanation:

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