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s2008m [1.1K]
4 years ago
7

Please help with vectors (will give BRAINLIEST answer)

Physics
1 answer:
zhenek [66]4 years ago
7 0

just analyze it in this way:

20cos30*=10( radical 3 )

20sin30*=10

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In a microwave oven, electrons describe circular motion in a magnetic field within a special tube called amagnetron; as you'll l
QveST [7]

Answer:

The magnetic field strength and the electrons' energy are 0.077 T and 0.8906 eV.

Explanation:

Given that,

Diameter = 2.62 mm

Frequency = 2.15 GHz

(A). We need to calculate the magnetic field strength

Using formula of the magnetic field strength

B=\dfrac{2\pi mf}{e}

Where, f = frequency

e = charge of electron

Put the value into the formula

B=\dfrac{2\times3.14\times9.1\times10^{-31}\times2.15\times10^{9}}{1.6\times10^{-19}}

B=0.077\ T

(B). We need to calculate the energy of electron

Using formula of energy

E=\dfrac{1}{2}m(r\omega)^2

E=\dfrac{1}{2}\times9.1\times10^{-31}\times(1.31\times10^{-3}\times2\pi\times2.15\times10^{9})^2

E=1.4249\times10^{-16}\ J

The energy in eV

1 eV=1.6\times10^{-16}\ J

E=\dfrac{1.4249\times10^{-16}}{1.6\times10^{-16}}

E=0.8906\ eV

Hence, The magnetic field strength and the electrons' energy are 0.077 T and 0.8906 eV.

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3 years ago
STATE THE HOOKE'S LAW
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If a gas has a gage pressure of 156 kPa, it is absolute pressure is approximately
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In the given question, one important information for getting to the actual solution is not given and that is the atmospheric pressure. To find the approximate absolute pressure, it is needed to add the value of atmospheric pressure with the gage pressure.
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2 ways in which the effects of friction can be minimised in the experiment​
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Answer:

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Explanation:

hope it helps

7 0
3 years ago
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