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4 years ago

What's the main difference between protons and neutrons?

Physics

1 answer:

statuscvo [17]4 years ago

5 0

Protons have a positive 1 charge while neutrons do not have a charge; they are neutral

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In an experiment, a rectangular block with height h is allowed to float in two separate liquids. In the first liquid, which is w

Amiraneli [1.4K]

Answer:

The relative density of the second liquid is 7.

Explanation:

From archimede's principle we know that the force that a liquid exerts on a object equals to the weight of the liquid that the object displaces.

Let us assume that the volume of the object is 'V'

Thus for the liquid in which the block is completely submerged

The buoyant force should be equal to weight of liquid

Mathematically

$F_{buoyant}=Weight\\\\\rho _{1}\times V\times g=m\times g\\\\\therefore \rho _{1}=\frac{m}{V}...............(i)$

Thus for the liquid in which the block is 1/7 submerged

The buoyant force should be equal to weight of liquid

Mathematically

$F'_{buoyant}=Weight\\\\\rho _{2}\times \frac{V}{7}\times g=m\times g\\\\\therefore \rho _{2}=\frac{7m}{V}.................(ii)$

Comparing equation 'i' and 'ii' we see that

$\rho_{2}=7\times \rho _{1}$

Since the first liquid is water thus $\rho _{1}=1gm/cm^3$

Thus the relative density of the second liquid is 7.

6 0

3 years ago

Read 2 more answers

Ocean depth is usually measured in fathoms, but that is not a relatable unit and is often converted. Echosounding determined the

BigorU [14]

Answer:

1404 m

Explanation:

Given that

Depth of ocean = 780 fathoms

Given that

1 fathoms = 1.8 metes

1 fathoms = 1.8 m

Therefore 780 fathoms

1 x 780 fathoms = 1.8 x 780 m

780 fathoms = 1.8 x 780 m

780 fathoms = 1404 m

Therefore the depth of the ocean in meters will be 1404 m.

Note- A fathom is a unit of length equal to 6 feet (1.828 m) in the imperial and U.S. customary systems, especially used to measure water depth in the ocean. In such an imperial fathom there are two yards (6 feet).

6 0

3 years ago

How much energy is required to raise the temperature of 5g of air by 10°C?

Alex777 [14]

You need to know the specific heat capacity of air.
Then energy needed = 0.005 x sp.heat.cap x 10

4 0

3 years ago

Heat always flows up. <br><br> true or false?

Phoenix [80]

Answer:

true

Explanation:

you don't need an explanation

6 0

3 years ago

List some ways houses would be built differently if gravity were much stronger or much weaker ?

trapecia [35]

Some houses would be cemented in if it was stronger they would just put it there

8 0

3 years ago