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SVEN [57.7K]
3 years ago
11

Do anyone answer this question​

Physics
2 answers:
lapo4ka [179]3 years ago
8 0

ANSWER:

[b] 10-²cms-¹.

EXPLANATION:

Drift speed as we know is the velocity gianed by an electron inside a material in an electric field as it keeps colliding with other metallic ions. this velocity is of the order of 10-²cm/s.

So, <u>Correct choice</u> - [b] 10-²cms-¹.

bezimeni [28]3 years ago
7 0

Answer:

B) 10^-2 cm/s

in term of meter. it is 10^-4 m/s

Explanation:

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g100num [7]

Answer:

θ=180°

Explanation:

The problem says that the vector product of A and B is in the +z-direction, and that the vector A is in the -x-direction. Since vector B has no x-component, and is perpendicular to the z-axis (as A and B are both perpendicular to their vector product), vector B has to be in the y-axis.

Using the right hand rule for vector product, we can test the two possible cases:

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  • If vector B is in the -y-axis, the product AxB should be in the +z-axis. This is the correct option.

Now, the problem says that the angle θ is measured from the +y-direction to the +z-direction. This means that the -y-direction has an angle of 180° (half turn).

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3 years ago
What relationship exists between speed, velocity, and acceleration
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If a small number of tree frogs migrate to a mat of vegetation that is already home to an established population of tree frogs a
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Answer:

D

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3 years ago
A felt-covered beanbag is fired into a empty wooden crate that sits on a concrete floor and is open on one side. The beanba
Phantasy [73]

Answer:

31.42383 m/s

Explanation:

g = Acceleration due to gravity = 9.81 m/s²

\mu = Coefficient of kinetic friction = 0.48

s = Displacement = 0.935 m

m_1 = Mass of bean bag = 0.354 kg

m_2 = Mass of empty crate = 3.77 kg

v_1 = Speed of the bean bag

v_2 = Speed of the crate

Acceleration

a=-\frac{f}{m}\\\Rightarrow a=-\frac{\mu mg}{m}\\\Rightarrow a=-\mu g

a=--9.81\times 0.48=4.7088\ m/s^2

From equation of motion

v^2-u^2=2as\\\Rightarrow v=\sqrt{2as+u^2}\\\Rightarrow v=\sqrt{2\times 4.7088\times 0.935+0^2}\\\Rightarrow v=2.96739\ m/s

In this system the momentum is conserved

m_1v_1=(m_1+m_2)v_2\\\Rightarrow v_1=\frac{(m_1+m_2)v_2}{m_1}\\\Rightarrow u=\frac{(0.354+3.77)\times 2.69739}{0.354}\\\Rightarrow u=31.42383\ m/s

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8 0
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Which property of a measurement is best estimated from the percent error? accuracy median precision range
Katena32 [7]

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Explanation:

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7 0
3 years ago
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