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Veseljchak [2.6K]
3 years ago
13

The fact that, in general, liquids and gases expand when heated

Physics
1 answer:
nordsb [41]3 years ago
7 0

The fact that, in general, liquids and gases expand when heated gives rise to

b) convection currents in fluids due to changing densities.

\bold{ \green{ \star{ \orange{Mystique35}}}}⋆

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What is a compound?
kirza4 [7]

Answer:compound is a poly element pure substance

Explanation:

It made up of two or more elements.

It can be broen down into simpler units

7 0
3 years ago
In a power plant, pipes transporting superheated vapor are very common. Superheated vapor flows at a rate of 0.3 kg/s inside a p
grigory [225]

Answer:h=160.84 W/m^2-K

Explanation:

Given

mass flow rate=0.3 kg/s

diameter of pipe=5 cm

length of pipe=10 m

Inside temperature=22

Pipe surface =100

Temperature drop=30

specific heat of vapor(c)=2190 J/kg.k

heat supplied Q=mc\Delta T=0.3\times 2190\times (30)

Heat due to convection =hA(100-30)

A=\pi d\cdot L

A=\pi 0.05\times 10=1.571 m^2

Q_{convection}=h\times 1.571\times (100-22)=122.538 h

Q=Q_{convection}

19,710=122.538 h

h=160.84 W/m^2-K

5 0
2 years ago
A force of 120 N is exerted on a 40 kg container which sits on a floor. If the frictional force between floor and container is 8
harkovskaia [24]

Answer:

Magnitude is 144N .

Explanation:

a²+b²=c²

120N²+80N²=c²

14400+6400=c²

\sqrt{20800}   =  \sqrt{c} ^{2}

144N=c

7 0
2 years ago
An object weighing 4 newtons swings on the end of a string as a simple pendulum. At the bottom of the swing, the tension in the
Anit [1.1K]

Answer:

(B) 0.5 g

Explanation:

Newton's second law says ∑  F i = m a .

the rate of change in momentum of a body is proportional to the force applied on the body.

f∝ma

f=kma

were k is constant and equal to 1

The centripetal acceleration is an acceleration.

the tension on the swing and object weight goes to the left hand side while the centripetal acceleration goes to the right handside

At the bottom of the swing, ΣF = FT – mg = mac;

notice that the tension in the swing is 1.5 times the weight of the object

we can write

1.5mg – mg = mac,

0.5mg = mac

0.5 g=ac

8 0
2 years ago
Read 2 more answers
A skydiver reaches terminal velocity. Then he opens his parachute.
schepotkina [342]

Answer:

it is 0.9999.10896

Explanation:

4 0
2 years ago
Read 2 more answers
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