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goldenfox [79]
2 years ago
11

Why is it easier to open a door by holding it from it's edge​

Physics
1 answer:
Crazy boy [7]2 years ago
3 0

Answer:

leverage

Explanation:

Leverage ...this allows you to use less force through a longer distance

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A rock, with a density of 3.55 g/cm^3 and a volume of 470 cm^3, is thrown in a lake. a) What is the weight of the rock out of th
SIZIF [17.4K]

Answer:

a) Weight of the rock out of the water = 16.37 N

b) Buoyancy force = 4.61 N

c) Mass of the water displaced = 0.47 kg

d) Weight of rock under water = 11.76 N

Explanation:

a) Mass of the rock out of the water = Volume x Density

   Volume = 470 cm³

   Density = 3.55 g/cm³

   Mass = 470 x 3.55 = 1668.5 g = 1.6685 kg

   Weight of the rock out of the water = 1.6685 x 9.81 = 16.37 N

b) Buoyancy force = Volume x Density of liquid x Acceleration due to gravity.

   Volume = 470 cm³

   Density of liquid = 1 g/cm³

   \texttt{Buoyancy force}= \frac{470\times 1\times 9.81}{1000} = 4.61 N

c) Mass of the water displaced = Volume of body x Density of liquid

   Mass of the water displaced = 470 x 1 = 470 g = 0.47 kg

d) Weight of rock under water = Weight of the rock out of the water - Buoyancy force

   Weight of rock under water = 16.37 - 4.61  =11.76 N

3 0
3 years ago
19. When baking soda and vinegar are combined, the result is a salt called sodium acetate. This forms
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A small omnidirectional stereo speaker produces waves in all directions that have an intensity of 8.00 at a distance of 4.00 fro
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Answer:

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SI is considered a consistent system because it what
NemiM [27]

Answer:

because it is a worldwide system....

Explanation:

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The weight of air resting on a surface, divided by the area
of the surface ... described in units of force per unit area ...
is called air pressure.

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3 years ago
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