All categories

4 years ago

Which method of heat transfer takes place when particles of matter vibrate and collide with each other in direct contact

Physics

2 answers:

Illusion [34]4 years ago

8 0

Answer:

Conduction of heat

Explanation:

The conduction of heat is defined as the movement of the internal heat energy within the same body due to the crashing and impact of atomic particles and the migration of electrons. This process occurs due to the direct contact of these minute particles.

The heat conduction takes place when any particular object is heated at a high-temperature. Due to this, the particles that are present inside the object acquires energy and starts vibrating. These molecules then flow in the adjacent areas transporting a certain amount of energy.

In the case of metals, the heat conduction takes place very efficiently. So they are considered to be a good conduction of heat.

Cerrena [4.2K]4 years ago

6 0

Conduction, hope this helps! :)

You might be interested in

A sample of a solid substance has a mass m and a density ?0 at a temperature T0. (a) Find the density of the substance if its te

creativ13 [48]

(a). If the temperature of a substance is increased the density of it will also increased. The temperature is directly proportional to the density because the molecular activity of the substance will be affected by the temperature

(b).The mass of the substance doesn't at all. Because the amount of matter inside the substance cannot be affected by the temperature except that its water

8 0

4 years ago

Amy has a mass of 30 kg and she is riding a skateboard traveling 5 m/s.whats her momentum?

mina [271]

You always multiply the mass (kg) by the velocity at which the object is travelling (m/s) to get the momentum (kg m/s) thus: 30 × 5 = 150 kg m/s

5 0

4 years ago

Water at 20 C flows through a 5-cm-diameter pipe that has a 180 vertical bend, as in Fig. P3.43. The total length of pipe betwee

Nataliya [291]

Answer:

F = 749 [N]

Explanation:

We must give full information on this problem, as well as the question that needs to be resolved.

Water at 20°C flows through a 5-cm-diameter pipe that has a 180° vertical bend. The total length of pipe between flanges 1 and 2 is 75 cm. When the weight flow rate is 230 N/s,

P1=165kPa

and

P2=134kPa

Neglecting pipe weight, determine the total force that the flanges must withstand for this flow.

We must make a U-shaped body diagram of the pipe in order to visualize the forces acting according to the pressures and the area of the pipe.

Then by means of the second law of motion of Newton, which says that the sum of the forces must be equal to the product of mass times acceleration, we can find the force Fp

Let us remember that pressure is defined as the divided force over the area, therefore:

F = P *A

where:

P = pressure

A = area

The product of the mass by acceleration, is equal to the product of the speed of the fluid by the mass flow, since we know the weight of the fluid we can find its mass flow.

$W_{flow}=230[N/s]\\W_{flow} =g*m_{flow}\\m_{flow} = W_{flow} / g\\m_{flow} = 230/9.81\\m_{flow}= 23.45[kg/s]$

In the function of the mass flow, we can find the velocity of the fluid, as we also know the diameter of the pipe

$m_{flow} = density*v*A\\where\\density = 1000[kg/m^{3}]\\ v= velocity[m/s]\\A = area [m^{2}]\\v=\frac{m_{flow}}{density*A} \\v=\frac{23.45}{1000*\frac{\pi}{4}*(5*10^{-2})^{2} } \\v= 11.94 [m/s]$

We know that the atmospheric pressure is equal to:

$P_{atm} = 101.325[kpa]$

The value of the pipe area is calculated for a circular section

$A = \frac{\pi}{4} * (0.05)^{2}\\ A = 0.00196[m^{2} ]$

The resultant force is 749 [N]

The solution of the equations and the free body diagram can be seen in the attached picture.

3 0

3 years ago

Can someone answer this.

klemol [59]

Take left to be the negative direction, and right to be positive. That means the forces on the squirrel would be -2N and 3N.

Add all the forces to find the net force on the squirrel. -2N+3N=1N

Because the positive direction is to the right, the net force of 1N is directed to the right.

4 0

4 years ago

A 1400 kg compact car rear-ends a 2000 kg truck. which vehicle experiences the larger momentum change from the collision?

Fittoniya [83]

Both vehicles experience the same change in momentum.

When the compact car rear ends a truck, they exert equal forces on each other, in accordance with Newton's third law. The force exerted by the car on the truck is equal to the force exerted by the truck on the car.The force acting on the two bodies act for the same interval of time.

According to Newton's second law, the force acting on a body is equal to the rate of change of momentum.

Since the forces are equal,

$F=\frac{\Delta p_1}{t} =\frac{\Delta p_2}{t}$

therefore, the change in momentum of the car $\Delta p_1$ is equal to the change in the momentum of the truck $\Delta p_2$ .

Thus, both the car and the truck experience the same change in their momentum. However due to the smaller mass of the car, the change in its velocity is greater than the change in the truck's velocity, which has a larger mass.

3 0

4 years ago

Read 2 more answers