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larisa [96]
3 years ago
14

The energy of a machine that is transformed into heat:

Physics
2 answers:
JulijaS [17]3 years ago
3 0

Answer:

is destroy.

Explanation:

Because it is one of the demerit of a machine

Rzqust [24]3 years ago
3 0

Answer: i dont know

Explanation:

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An electron moves a 2.0x10^6 meter per the second perpendicular to a magnetic field having a flux density of 2 teslas. What is t
Darina [25.2K]

Answer:

F_B = 6.4*10^-13 N

Explanation:

The magnetic force on the electron, generated by the motion of the electron and the magnetic field is given by:

F_B=qv\ X\ B

q: electron charge = 1.6*10^{-19}C

v: speed of the electron = 2.0*10^6 m/s

B: magnitude of the magnetic field = 2T

However, the direction of B and v are perpendicular between them. So, the angle between vectors is 90°. The magnitude of the magnetic force is:

|F_B|=qvBsin90\°=qvB

You replace the values of q, v and B in the last equation:

|F_B|=(1.6*10^{-19}C)(2.0*10^6m/s)(2T)\\\\|F_B|=6.4*10^{-13}\ N

hence, the magnetic force on the electron is 6.4*10^-23 N

6 0
3 years ago
A. What is the frequency of blue light that has a wavelength of 450 nm?
erastova [34]

Answer

a)Given,

Wavelength of blue light = 450 n m = 450 x 10⁻⁹ m

 Speed of light = 3 x 10⁸ m/s

we know,

       c = \nu \lambda

       \nu = \dfrac{c}{\lambda}

       \nu = \dfrac{3\times 10^8}{450\times 10^{-9}}

      \nu = 6.67 \times 10^{14}\ Hz

b)Given,

Wavelength of red light = 650 n m = 650 x 10⁻⁹ m

 Speed of light = 3 x 10⁸ m/s

we know,

       c = \nu \lambda

       \nu = \dfrac{c}{\lambda}

       \nu = \dfrac{3\times 10^8}{650\times 10^{-9}}

      \nu = 4.62 \times 10^{14}\ Hz

3 0
3 years ago
As energy moves out from the sun’s core toward its surface, it first travels by _______, then by _______, and then by _______.
7nadin3 [17]

Answer:

neutrinos and seismic vibrations

Explanation:

6 0
2 years ago
The energy stored in compounds and released in reactions is what kind of energy?
Lubov Fominskaja [6]

The answer is D. Chemical Energy

4 0
3 years ago
When partners representing multiple jurisdictions and agencies
belka [17]

Answer:

When partners representing multiple jurisdictions or agencies work together to establish the incident objectives, Unified Command is being used.

Explanation:

4 0
3 years ago
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