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Basile [38]
3 years ago
15

The law of reflection states that if the angle of incidence is 39 degrees, the angle of reflection is ___ degrees.

Physics
1 answer:
marishachu [46]3 years ago
8 0
It's 39 degrees, too


good luck
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Substance A has a heat capacity that is much greater than that of substance B. If 10.0 g of substance A initially at 30.0 ∘C is
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What is the difference between a neap and a spring tide in terms of size?
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A particle moves along a straight path through a displacement d = 2.5i + cj while a force F = 8.5i + -8.5j acts on it. The displ
Zanzabum

Answer:

Explanation:

Work is defined as the scalar product of force and distance

W=F•d

Given that

F = 8.5i + -8.5j. +×-=-

F=8.5i-8.5j

d = 2.5i + cj

If the work in the practice is zero, then W=0

therefore,

W=F•ds

0=F•ds

0=(8.5i -8.5j)•(2.5i + cj)

Note that

i.i=j.j=k.k=1

i.j=j.i=k.i=i.k=j.k=k.j=0

So applying this

0=(8.5i -8.5j)•(2.5i + cj)

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0=21.25-8.5c

Therefore,

8.5c=21.25

c=21.25/8.5

c=2.5

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