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4 years ago

HELP!!!

2 answers:

5 0

We shall consider two properties:
1. Temperature difference
2. Thermal conductivity of the material

Use a cylindrical rod of a given material (say steel) which is insulated around its circumference.

One end of the rod is dipped in a large reservoir of water at 100 deg.C and the other end is dipped in water (with known volume) at 40 deg. C. The cold water if stored in a cylinder which is insulated on all sides. A thermometer reads the temperature of the cold water as a function of time.

This experiment will show that
(a) heat flows from a region of high temperature to a region of lower temperature.
(b) The thermal energy of a body increases when heat is added to it, and its temperature will rise.
(c) The thermal conductivity of water determines how quickly its temperature will rise. If mercury replaces water in the cold cylinder, its temperature will rise at a different rate because its thermal conductivity is different.

BabaBlast [244]4 years ago

5 0

How do mass and the type of material affect thermal energy transfer? This is the e2020 sample response.

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An apparatus like the one Cavendish used to ﬁnd G has large lead balls that are 5.2 kg in mass and small ones that are 0.046 kg.

Ber [7]

Answer:

The magnitude of gravitational force between two masses is $4.91\times 10^{-9}\ N$ .

Explanation:

Given that,

Mass of first lead ball, $m_1=5.2\ kg$

Mass of the other lead ball, $m_2=0.046\ kg$

The center of a large ball is separated by 0.057 m from the center of a small ball, r = 0.057 m

We need to find the magnitude of the gravitational force between the masses. It is given by the formula of the gravitational force. It is given by :

$F=G\dfrac{m_1m_2}{r^2}\\\\F=6.67259\times 10^{-11}\times \dfrac{5.2\times 0.046}{(0.057)^2}\\\\F=4.91\times 10^{-9}\ N$

So, the magnitude of gravitational force between two masses is $4.91\times 10^{-9}\ N$ . Hence, this is the required solution.

5 0

3 years ago

A man takes 3 seconds to complete a 15 m race. What is his velocity?

soldier1979 [14.2K]

Answer:

I think velocity is 5m/s.

5 0

3 years ago

Read 2 more answers

Ch 14:42

Alisiya [41]

Answer:

1000m3

Explanation:

12000=mass*gravity, considerinh gravity 10

12000=mass*10 then mass=1200Kg

With density 1.2Kg/m3

1.2Kg ... 1m3

1200Kg ... 1000m3

End

4 0

3 years ago

Distinguish between dia,para and ferro magnetic materials.

xz_007 [3.2K]

Answer:

The key difference between diamagnetic, paramagnetic and ferromagnetic materials is that diamagnetic materials are not attracted to an external magnetic field, and paramagnetic materials are attracted to an external magnetic field whereas ferromagnetic materials are strongly attracted to an external magnetic field.

4 0

3 years ago

What is the correct answer?

inysia [295]

The answer to your question is metaphase

3 0

4 years ago