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ddd [48]
3 years ago
15

Identify three devices that use Convex lenses.

Physics
2 answers:
Yuliya22 [10]3 years ago
6 0
Microscope lenses , glasses for people who can't see faraway as well and  microwave lenses which reflect electromagnetic radiation. Oh and curved mirrors.  
AleksAgata [21]3 years ago
6 0

Answer:

Explanation:

Convex lens is the lens which is used to converge the rays of light after refraction.

When the rays of light are coming parallel to the principal axis then after refraction they goes from the focus.

It is used as rear view mirror in automobiles. In this case it pelroduces small and erect image of faroff objects.

It is used in spectacles using for hypermetropia.

It is used in microscopes and telescopes.

Our eye also have a convex lens which forms images on retina.

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A 5kg box rests on a table. a 3 kg box rests on top of the 5 kg box. what is the normal force from the table?
Murrr4er [49]

==>  The total mass resting on the table is (5 kg + 3 kg) = 8 kg.

==>  The total weight of that mass is (8 kg) x (9.8 m/s) = 78.4 newtons

==>  The boxes are stacked.  So the table doesn't know if the weight on it is coming from one box, 2 boxes, 3 boxes, or 100 boxes in a stack.  The table only knows that there is a downward force of 78.4 newtons on it.

==>  The table stands in a Physics classroom, and it soaks up everything it hears there.  It knows that every action produces an equal and opposite reaction, and that forces always occur in pairs.  

Ever since the day it was only a pile of lumber out behind the hardware store in the rain, the table has known that in order to maintain the good  reputation of tables all over the world, it must resist the weight of anything placed upon it with an identical upward force.  This is the normal thing for all good tables to do, up to the ultimate structural limit of their materials and construction, and it is known as the "normal force".

So the table in your question provides a normal force of 78.4 newtons. (d)

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3 years ago
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(i) (a) what is the force per meter of length on a straight wire carrying a 9.75 a current when perpendicular to a 0.81 t unifor
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The force generated by a magnetic field B perpendicular to a wire carrying a current I is
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If we divide both sides for L, we get
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\frac{F}{L}=IB=(9.75 A)(0.81 A)=7.90 N/m
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4 years ago
how does the charge of a particle affect the direction in which the particle is deflected in a magnetic field?
zubka84 [21]
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3 years ago
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