What three things are carried throughout the body by the cardiovascular system

Estimate the peak wavelength for radiation from ice at 273 k.

Andrews [41]

<h2>Answer: 10615 nm</h2>

Explanation:

This problem can be solved by the Wien's displacement law, which relates the wavelength $\lambda_{p}$ where the intensity of the radiation is maximum (also called peak wavelength) with the temperature $T$ of the black body.

In other words:

<em>There is an inverse relationship between the wavelength at which the emission peak of a blackbody occurs and its temperature.</em>

Being this expresed as:

$\lambda_{p}.T=C$ (1)

Where:

$T$ is in Kelvin (K)

$\lambda_{p}$ is the <u>wavelength of the emission peak</u> in meters (m).

$C$ is the <u>Wien constant</u>, whose value is $2.898(10)^{-3}m.K$

From this we can deduce that the higher the black body temperature, the shorter the maximum wavelength of emission will be.

Now, let's apply equation (1), finding $\lambda_{p}$ :

$\lambda_{p}=\frac{C}{T}$ (2)

$\lambda_{p}=\frac{2.898(10)^{-3}m.K}{273K}$

Finally:

$\lambda_{p}=10615(10)^{-9}m=10615nm$ This is the peak wavelength for radiation from ice at 273 K, and corresponds to the<u> infrared.</u>

8 0

2 years ago

Shelby travels 6 meters East, 2 meters North, 3 meters West, and then 2 meters South. What is their displacement?

yaroslaw [1]

Answer:

3 m

Explanation:

At last, Same line; so, 6-3 = 3

7 0

3 years ago

I need help with a physics worksheet about Newtons Laws.

Viktor [21]

The diagram of the object on the inclined plane is shown below

The mass of 7kg is exerted on the plane surface. It is acted upon by gravity. The force exerted on the surface is calculated by applying the formula,

F = mass x acceleration due to gravity

Assumme acceleration due to gravity is 9.8m/s^2, then

Force = 7 x 9.8 = 68.6N

The surface exerts an opposite force of the same magnitude with the force of the object but in opposite direction. Since it is inclined at an angle of 36.9 degrees,

Normal force = mgCosθ = 68.6Cos36.9 = 54.86N

Recall, frictional force = normal reaction x coefficient of friction

Given that coefficient of kinetic friction = 0.35,

Frictional force = 54.86 x 0.35 = 19.201N

This is the force that must be overcome to keep the object moving.

The force pulling the object upwards along the inclined plane is

mgSinθ = 7 x 9.8 x Sin36.9 = 41.19N

Since the velocity is constant, it means that there is no acceleration. The net force is zero. The force required to pull the mass and make it move at constant velocity must be equal to the sum of the exerted force and the the frictional force(Since it involves coeffricient of kinetic friction, it would cause the object to keep moving)

Thus,

Required force = 19.2 + 41.19 = 60.4N

Option E is correct

8 0

8 months ago

A 100-n object and a 50-n object are placed on scales a and b respectively inside an elevator ascending with constant velocity

german

Answer: b

Explanation:

8 0

2 years ago

A block measure 10 cm by 10 cm by 5 cm , what is it’s volume

Lina20 [59]

I think it is 500 cm. Hope I helped!

5 0

3 years ago