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Sindrei [870]
3 years ago
11

A block of ice is floating in a cup of water. It is 0.5 cm above the water surface and its length

Physics
1 answer:
Lapatulllka [165]3 years ago
6 0

Answer:

Let the volume of the cube be V and the fraction of cube outside water be f.

Thus, volume of ice inside water = volume of water displaced =(1−f)V

Under equilibrium,

Weight of ice = Weight of water displaced

⟹Vρ

ice

g=(1−f)Vρ

water

g

⟹(1−f)=

10

9

⟹f=

10

1

Thus, the percentage of volume outside water =10%

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An object is hung from a spring balance attached to the ceiling of an elevator cab. The balance reads 85 N when the elevator is
Ilia_Sergeevich [38]

Answer:

Explanation:

Balance force ( W ) = 85 N

a)  moving upward with constant velocity (V ) = 7.9 m/s.

The reading will not change since it is moving with constant velocity

  W = 85 N

b) Moving upward with V = 7.9 m/s and decelerating at the rate of (a ) = 1.1 m /s²

The net force ( F ) = W - ma

where m = W/g = 85/9.81 = 8.6646 kg

F = 85 - 8.6646 * 1.1 = 75.4689 N

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3 years ago
A warm-up is the exact same thing as a flexibility workout<br><br> True<br> False
kykrilka [37]
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4 years ago
You drop a 0.375 kg ball from a height of 1.37 m. It hits the ground and bounces up again to a height of 0.67 m. How much energy
Radda [10]

2.57 joule energy lose in the bounce .

<u>Explanation</u>:

when ball is the height of 1.37 m from the ground  it has some gravitational potential energy with respect to hits the ground  

Formula for gravitational potential energy given by  

Potential Energy = mgh

Where ,

m = mass  

g = acceleration due to gravity  

h = height

Potential energy when ball hits the ground

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h = 1.37 m

g = 9.8 m/s²

Potential Energy = 0.375\times9.8\times1.37

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h= 0.67 m

Potential Energy = 0.375\times0.67\times9.8

Potential Energy = 2.46 joule

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3 years ago
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ValentinkaMS [17]
To solve this we are going to use the formula for work: W=Fd
where
W is the work done
F is the force 
d is the distance 

Scenario A. We know for our problem that F=15N and d=3m. Lets replace those values in our formula to find W:
W=15N*3m
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Scenario B. We know for our problem that F=12N and d=4. Lest replace those value in our formula:
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Scenario C. We know for our problem that F=10N and d=6m. Lets replace the values in our formula:
F=10N*6m
F=60J

We can conclude that:
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7 0
3 years ago
Read 2 more answers
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s344n2d4d5 [400]
An element's "Atomic number" IS the number of protons
in the nucleus of each atom of the element.

If an element's Atomic number is 25, then it must follow ...
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7 0
3 years ago
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