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4 years ago

Please Help!!!!

2 answers:

8 0

C. Chemical Energy is transformed to light energy and heat energy. The heat energy is keeping you warm and light energy is giving you the light you need to be able to read the book.

lapo4ka [179]4 years ago

7 0

Answer:

C. Chemical energy is transformed to light energy and heat energy.

Explanation:

Here it is given that the fire is used for two objectives

1) To warm yourself

which means we need some thermal energy so that we get the warmth from it.

2) To see to read the book

here in order read the book we required light of sufficient intensity so here we require light energy for this.

so from above requirements of energy we can say that here the energy contained in the wooden block is converted into the above forms

Also we know that energy contained in the wooden block is in the form of chemical energy so here correct answer will be

C. Chemical energy is transformed to light energy and heat energy.

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A rod of length 0.82 m, rotating with an angular speed, 4.2 rad/s, about axes that pass perpendicularly through one end, has a m

vodomira [7]

Hi there!

$\large\boxed{KE =1.245 J}}$

The equation of angular kinetic energy is:

$KE = \frac{1}{2}Iw^2$

Where:

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ω = angular speed (rad/sec)

A rod rotated about one of its endpoints has a standard moment of inertia of 1/3mR², so:

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$KE = \frac{1}{6}mL^2w^2$

Plug in the given values:

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