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Illusion [34]
3 years ago
6

Help please with number 7 !!!!!!! Plz ahhhhhh

Physics
1 answer:
baherus [9]3 years ago
5 0

it is the Atlantic ocean

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Hii can someone please doo this! 50 pointss.
andrey2020 [161]

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The periodic table illustrate some of the elements from Hydrogen to Calcium

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4 years ago
What is the net force acting on an object that is not accelerating in the horizontal axis?
yuradex [85]

Answer:

.......................

Explanation:

A net force = unbalanced force. If however, the forces are balanced (in equilibrium) and there is no net force, the object will not accelerate and the velocity will remain constant.

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3 years ago
A copper wire has a square cross section 2.0 mm on a side. The wire is 5.0 m long and carries a current of 2.0 A. The density of
kondor19780726 [428]

Answer:

30.22 hours

Explanation:

Given data:

A= l² = (2 x 10^{-3})² = 4 x 10^{-6} m²

Length 'L' = 5m

current 'I' = 2 A

density of free electrons 'n'= 8.5 x 10^{28} /m³

Current Density 'J' = I/ A

J= 2/4 x 10^{-6}

J= 5 x 10^{5} A/m²

We can determine the  time required for an electron to travel the length of the wire by

T= L/ Vd

Where,

L is length and Vd is drift velocity.

Vd can be defined by J/ n|q|

where,

n is the charge-carrier number density

|q| is is the charge carried by each charge carrier =>1.6 x 10^{-19}C

T= L/ Vd

Therefore,

T= L . n|q| / J

T= (4 x 8.5 x 10^{28} x |1.6 x 10^{-19}|)/5 x 10^{5}

T= 108800 seconds =>1813.33 minutes

Converting minute into hours:

T= 30.22 hours

Thus, time that is required for an electron to travel the length of the wire is 30.22 hours

4 0
3 years ago
What must happen to the electrons in a material to create an electric current?
zhenek [66]
You have to have electrons that are in the materials conduction band. Then you apply a voltage across the material. 
8 0
4 years ago
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