3 years ago

How much force is required to drag a 90 lb. box up this "frictionless" inclined plane? 109 lb. 10 lb. 81 lb. 9 lb.

Physics

2 answers:

MrRissso [65]3 years ago

5 0

I believe is 10 lb if not it's 9 lb.

Alex Ar [27]3 years ago

4 0

The correct answer is b) 10 lbs.

I hope that I was of help.

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Answer:

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Explanation:

We solve this problem by applying the formula of the magnetic field generated at a distance by a long and straight conductor wire that carries electric current, as follows:

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B= Magnetic field due to a straight and long wire that carries current

u= Free space permeability

I= Electrical current passing through the wire

a = Perpendicular distance from the wire to the point where the magnetic field is located

Magnetic Field Calculation

We cleared (I) of the formula (1):

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$I=\frac{2\pi*0.08*0.2*10^{-5} }{4\pi *10x^{-7} }$

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Answer: The electric current in the wire is 0.8 A

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2 years ago

Atoms are the smallest portions of an element that retain the original characteristics of the element. True or false

kozerog [31]

Answer:

True

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Going even smaller than atoms would get you to subatomic particles such as quarks. From there, it is impossible to distinguish elements. So, yes, atoms are the smallest portions of an element that retains the original characteristic of the element.

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