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2 years ago

Where should i shift realities to?

Physics

2 answers:

zloy xaker [14]2 years ago

6 0

go to doc micstuffens world

aleksandrvk [35]2 years ago

6 0

Answer:

any movie you like or game or just anywhere really

Explanation:

but im shifting to mha

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If a certain mass of mercury has a volume of 0.002 m3 at a temperature of 20°C, what will be the volume at 50°C?

mel-nik [20]

As per the question the volume of mercury is given as 0.002 m^3 at 20 degree Celsius.

We are asked to calculate the volume of the mercury at 50 degree Celsius.

This problem is based on thermal expansion of matter.

Let us consider the initial and final volume of the mercury is denoted as -

$v_{1} \ and\ v_{2}$

Let the initial and final temperature of the mercury is denoted as -

$T_{1}\ and \ T_{2}$

As per question

$v_{1} =0.002 m^3$ $v_{2} =?$

$T_{1} =20^0 C$ $T_{2} =50^0 C$

The change in temperature is

$T_{2} -T_{1}$

$= 50^0 C -20^0 C$

$= 30^0 C$

Mercury is a fluid.So we have to apply volume expansion of liquid .

The coefficient of of volume expansion of mercury $[ \gamma ]$ at 20 degree Celsius is 0.00018 per centigrade.

As per volume expansion of liquid,

$V_{T} = v_{1} [1 +\gamma [T_{2} -T_{1} ]]$

Here $V_{T}$ is the volume at T degree Celsius.

Hence volume at 50 degree Celsius is calculated as-

$v_{2} =v_{1} [1+\gamma[50-30]]$

$= 0.002[1+0.00018*30]$

$=0.0020108m^3$ [ans]

As per the options given in the question ,option A is close to the calculated value. So option A is right.

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2 years ago

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What is it called when a skydiver is no longer accelerating downward?

raketka [301]

Explanation:

Once the force of air resistance is as large as the force of gravity, a balance of forces is attained and the skydiver no longer accelerates. The skydiver is said to have reached a terminal velocity.

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2 years ago

Which force does not operate at a distance of 1 m?

sleet_krkn [62]

Answer:

Explanation:

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Place the following list in order of occurrence from oldest to most recent:

Andre45 [30]

Answer:

Explanation:

2.Big bang, 3.contraction of the solar nebula, 5.stellar ignition in our sun, 4.outgassing of earths secondary atmosphere, 1.appearance of the first ocean on earth ,7.evolution of photosynthesis, 6.build- up of oxygen in earths atmosphere.

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2 years ago

Two satellites A and B orbit the Earth in the same plane. Their masses are 5 m and 7 m, respectively, and their radii 4 r and 7

Dmitry [639]

Answer:

The ratio of their orbital speeds are 5:4.

Explanation:

Given that,

Mass of A = 5 m

Mass of B = 7 m

Radius of A = 4 r

Radius of B = 7 r