Mc2

Describe the nature of sunlight using the following: wavelength, electromagnetic spectrum, visible light, photons.

kogti [31]

Answer:

due to the effect of gravity begins thermonuclear fusion processes, in these processes energy is released in the form of electromagnetic radiation

Explanation:

The Sun is a star of great size, which due to the effect of gravity begins thermonuclear fusion processes, in these processes energy is released in the form of electromagnetic radiation.

This radiation crosses the different layers of the Sun and escapes from it in the form of light that is emitted throughout the radiation spectrum, due to the temperature reached by the Sun about 5500K the most likely radiation is around 5500 nm corresponding to the green- yellow of the visible spectrum, but the entire spectrum is emitted with different intensity according to Stefan's law

In quantum mechanics this spectrum can also be analyzed as the emission of particles called photons, where each one is characterized by an energy and has a moment equal to zero, the energy of these photons is related to their frequency by the Planck equation

E = h f

3 0

3 years ago

student measuring the mass of a rock recorded 6.759 g, 6.786 g, 6.812 g, and 6.779 g. which other measurment of the block mass w

Leya [2.2K]

Answer: 6.605

Explanation:

3 0

3 years ago

Your body produces sweat when you are hot.

sweet [91]

Answer:

That's because cooling your body via sweating relies on a principle of physics called "heat of vaporization." It takes energy to evaporate sweat off of your skin, and that energy is heat. As your excess body heat is used to convert beads of sweat into vapor, you start to cool down.

7 0

3 years ago

Could you help me with the question in the photo attached please.

s344n2d4d5 [400]

a) $a=\frac{m_2 g-m_1 g sin \theta}{m_1+m_2}$

b) Yes

c) $a=\frac{m_2 g-m_1 g sin \theta - \mu_k m_1 g cos \theta}{m_1+m_2}$

Explanation:

a)

To find the expression for the acceleration of the blocks, we have to write the equations of the forces acting on the two blocks.

In the following, we assume that the system accelerates downward (block 2) and up along the ramp (block 1).

For block 1, the equation of motion is:

$T-m_1 g sin \theta = m_1 a$

where:

T is the tension in the string (up along the ramp)

$m_1 g sin \theta$ is the component of the weight parallel to the ramp (down along the ramp), with

$m_1$ =mass of the block

$g$ = acceleration due to gravity

$\theta$ = angle of the ramp

$a$ is the acceleration of the system

For block 2, we have:

$m_2 g-T = m_2 a$

where

$m_2 g$ is the weight of block 2, where

$m_2$ is the mass of block 2

From eq. (2) we get

$T=m_2 g- m_2 a$

And substituting into eq.(1), we find an expression for the acceleration of the system:

$m_2 g- m_2 a -m_1 g sin \theta = m_1 a\\(m_1+m_2)a=m_2g-m_1 g sin \theta\\a=\frac{m_2 g-m_1 g sin \theta}{m_1+m_2}$

b)

We could have guessed the expression for the acceleration using Newton's second law:

$F=ma$

where, in this case:

F is the net force on the system, which is the difference between the weight of the block 2 and the component of the weight of block 1 acting along the ramp, so

$F=m_2 g- m_1 g sin \theta$