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Savatey [412]
3 years ago
7

Help me with this please thank you

Physics
1 answer:
marshall27 [118]3 years ago
5 0
Birds have to go to south to migrate, birds are big and some are small, birds have good eye sit this is for the first one
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Jfdojbfkkjds vdf;ifdfdi
Oliga [24]

Answer:

hsjishhdhjs jdjyshskksndhu

6 0
3 years ago
A 0.187 A current flows through a wire. How much time will it take for 2.00 C of charge to flow past a point in the wire?
Oksana_A [137]

Answer:A 0.187 A current flows through a wire. How much time will it take for 2.00 C of charge to flow past a point in the wire?

A. 10.7 s

B. 2.18 s

C. 0.374 s

D. 0.0935 s​

Explanation:

A 0.187 A current flows through a wire. How much time will it take for 2.00 C of charge to flow past a point in the wire?

A. 10.7 s

B. 2.18 s

C. 0.374 s

D. 0.0935 s​

7 0
3 years ago
An object's weight is dependent upon its location in the universe. Why is this true? A. This is true because weight is the amoun
Westkost [7]

I think its either C or D.

5 0
3 years ago
(a) Calculate the number of free electrons per cubic meter for gold assuming that there are 1.5 free electrons per gold atom. Th
KonstantinChe [14]

Answer:

Part A:

n=8.85*10^{28}m^{-3}

Part B:

Electron Mobility=3.03*10^{-3} m^2/V

Explanation:

Part A:

To calculate the number of free electrons n we use the following formula::

n=1.5N-Au

Where N-Au is number of gold atoms per cubic meter

N-Au=\frac{Density*Avogadro Number}{atomic weight}

Density = 19.32g/cm^3

Avogadro Number=6.02*10^{23} atoms/mol

Atomic weight=196.97g/mol

So:

n=1.5*\frac{Density*Avogadro Number}{atomic weight}

n=1.5*\frac{19.32*6.02*10^{23}}{196.97}

n=8.85*10^{28}m^{-3}

Part B:

Electron Mobility=\frac{Elec-conductivity}{n * charge on electron}

n is calculated above which is 8.85*10^{28}m^{-3}

Charge on electron=1.602*10^{-19}

Elec- Conductivity= 4.3*10^{7}

Electron Mobility=\frac{4.3*10^{7}}{ 8.85*10^{28} * 1.602*10^{-19}}

Electron Mobility=3.03*10^{-3} m^2/V

4 0
4 years ago
An aluminum rod is 300m and at 25 degree Celsius. Calculate the change in rod
Schach [20]

Answer:

Explanation:

540

6 0
3 years ago
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