Question

Forces acting on a particle have magnitudes 5N,3N and 1N act in the direction of vectors 6i+2j+3k,3i-2j+6k and 2i-3j-6k respectively.If the particle displaces from a point A(3,-1,-3) to (5,-1,-1),then the work done is​

Answer 1

Answer:

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Answer 2

Answer:

Find the energy received by the surface during time span of 1 minute.

Solution:

the intensity of the light incident is

E

I------

At

Here, I =20 W/cm2, Area A =20

:• 20 =____E_____

20×60

=> E = 20 × 20 × 60

E = 24 × 10 3 J

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