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3 years ago

Which type of engineer would most likely work with a renewable energy source?

Physics

2 answers:

julia-pushkina [17]3 years ago

8 0

I would say Solar Power Engineer.

babymother [125]3 years ago

8 0

Answer: C. Solar power engineer

Explanation:

A renewable source of energy is the energy that is harnessed from the renewable resources. The renewable resources are those resources which can be replenished once used. These resources are abundantly available in nature. These includes the sunlight, water, wind and forests.

Among the given options solar power engineer is the correct option. This is because of the fact that solar power is a renewable source of energy and it is the source of energy which cannot be depleted in nature. The radiant energy and heat from the sunlight can be used to generate electricity or to run the electrical devices.

The solar power engineer will construct the solar heating appliances, photovoltic cells, solar power plants, and other instruments or devices that works on the solar energy.

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A wheel that is rotating at 33.3 rad/s is given an angular acceleration of 2.15 rad/s 2. Through what angle has the wheel turned

Neporo4naja [7]

Answer:

The angle through which the wheel turned is 947.7 rad.

Explanation:

initial angular velocity, $\omega _i$ = 33.3 rad/s

angular acceleration, α = 2.15 rad/s²

final angular velocity, $\omega_f$ = 72 rad/s

angle the wheel turned, θ = ?

The angle through which the wheel turned can be calculated by applying the following kinematic equation;

$\omega_f^2 = \omega_i^2 + 2\alpha \theta\\\\\theta = \frac{\omega_f^2\ -\ \omega_i^2}{2\alpha } \\\\\theta = \frac{(72)^2\ -\ (33.3)^2}{2(2.15)}\\\\\theta = 947.7 \ rad$

Therefore, the angle through which the wheel turned is 947.7 rad.

5 0

3 years ago

Plz help me and thx if you do!

Rina8888 [55]

I think it’s b... not sure tho sorry

3 0

3 years ago

A fuel cell that is becoming very popular for cars runs on:

jok3333 [9.3K]

It runs on Hydrogen gas.

Actually, using hydrogen as a fuel is not new. We used to use it on air vehicle like air balloon. But back then, we still cannot figure out how to safely use this because Hydrogen exlodes rather easily

7 0

3 years ago

These spectra are from the same element. Which is an emission spectrum, which an absorption spectrum?

RSB [31]

Answer:

D. Top is emission; bottom absorption.

Explanation:

Emission and spectrum of elements are due to the element absorbing or emitting wavelength of e-m energy. Elementary particles of elements can absorb energy from a ground state to enter an excited state, creating an absorption spectrum, or they can lose energy and fall back to a lower energy state, creating an emission spectrum. A simple rule to differentiate between an emission and an absorption spectrum is that: "all absorbed wavelength is emitted, but not all emitted wavelength is absorbed."

From the image, the lines indicates wavelengths. We can see that all of the wavelengths of the bottom absorption spectrum coincides with some of the wavelength of the upper emission wavelengths.

3 0

3 years ago

If a farsighted person has a near point that is 0.600 m from the eye, what is the focal length f2 of the contact lenses that the

Doss [256]

Answer:

0.84 cm

Explanation:

u = Object distance = 0.35 cm

v = Image distance = -0.6 cm (near point is considered as image distance and negative due to sign convention)

f = Focal length

From lens equation

$\frac{1}{f_2}=\frac{1}{u}+\frac{1}{v}\\\Rightarrow \frac{1}{f_2}=\frac{1}{0.35}+\frac{1}{-0.6}\\\Rightarrow \frac{1}{f_2}=\frac{25}{21}\\\Rightarrow f_2=\frac{21}{25}=0.84\ cm$

Focal length of the lens is 0.84 cm

3 0

3 years ago