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3 years ago

Explain,in terms of particles,how heat is transferred through the glass wall of a boiling tube

1 answer:

4 0

Considering the great topic of thermodynamics (assuming normal atmospheric pressure):

Keep in mind that hotness (temperature) and heat are related but not the same thing. Each time water goes from one state to another, it requires the gain or loss of heat.
In this case the boiling water is gaining heat, the water molecules are vibrating faster with more kinetic energy (energy of motion). The (heat) energy is transferred by the rapid movement of particles colliding with other particles.

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A 900 N crate is being pulled across a level floor by a force F of 340 N at an angle of 23° above the horizontal. The coefficien

Olegator [25]

Answer:

0.958891203 m/s²

Explanation:

N = Weight of crate = 900 N

$\mu$ = Coefficient of friction = 0.25

Force of friction acting on the force applied

$f=\mu N\\\Rightarrow f=0.25\times 900\\\Rightarrow f=225\ N$

Force used to pull the crate

$F=340cos 23\\\Rightarrow F=312.97165\ N$

The net force is

$F_n=F-f\\\Rightarrow F_n=312.97167-225\\\Rightarrow F_n=87.97167\ N$

Acceleration is given by

$a=\frac{F_n}{m}\\\Rightarrow a=\dfrac{87.97167}{\dfrac{900}{9.81}}\\\Rightarrow a=0.958891203\ m/s^2$

The magnitude of the acceleration of the crate is 0.958891203 m/s²

4 0

4 years ago

What would happen if you touched an object that is the same temperature as your hand? Would any heat transfer happen? Explain yo

ICE Princess25 [194]

Answer:

It actually depends.

Explanation:

in the case of a metal ur hand will absorb the heat (but it depends on the temperature, this ans favours hot and cold but not neutral or room temperature), in the case of human to human I think no heat transfer will take place, in the case of liquids(for hot temperature ,it would even for cold but not room).

It basically involves application

4 0

3 years ago

Alan starts from his home and walks 1.3 km east to the library. He walks an additional 0.68 km east to a music store. From there

zepelin [54]

Answer: final Displacement = 0 km, total distance covered =7 km

Explanation:

Given the following :

From home to library = 1.3 km East

Library to music store = 0.68km East

Music store to friend's house = 1.1km North

Friend's house to grocery store = 0.42 km North

Displacement is the net change in distance traveled.

Eastward distance :

To = (1.3 + 0.68)km = 1.98km East

Fro = (0.68 + 1.3)km = 1.98 km East

Δ distance = (1.98 - 1.98) = 0

Northward direction:

To = (1.1 + 0.42)km = 1.52km north

Fro = (0.42 + 1.1)km = 1.52km North

Δ distance = (1.98 - 1.98) = 0

Hence final Displacement = 0

Total distance covered = 2 × (1.3 + 0.68 + 1.1 + 0.42) = 2 × 3.5

= 7km

3 0

4 years ago

When you’re driving on a level road and there’s ice on the pavement, you hardly notice that ice while you’re heading straight at

fenix001 [56]

Answer:We only Friction while accelerating or decelerating

Explanation:

This occurs because when we try to turn left or right , we are trying to change the velocity of car which in turns result in acceleration and finally change in force .

Change in force causes friction to vary and we experience the slipperiness of road.

3 0

3 years ago

Which of the following is the best thermal conductor?

vredina [299]

Answer:

Which of the following is the best thermal conductor?

well my friend the answer is DUN DUN DUN....cooper

~batmans wife dun dun dun...

5 0

4 years ago