3 years ago

Which of the following is a conversion from light energy to chemical energy?

Physics

2 answers:

vlada-n [284]3 years ago

8 0

I think it’s turning on a lamp

Bumek [7]3 years ago

8 0

Answer:

Explanation:

When you turn on a stove, first comes light.

The light from the fire is then turned into chemical energy which is used to heat the food!

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Species distribution

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Newton’s ______ law states that an object in motion stays in motion unless an unbalanced force acts on that object.

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an object 50 cm high is placed 1 m in front of a converging lens whose focal length is 1.5 m. determine the image height (in cm)

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Given :

An object 50 cm high is placed 1 m in front of a converging lens whose focal length is 1.5 m.

To Find :

the image height (in cm).

Solution :

By lens formula :

$\dfrac{1}{v} - \dfrac{1}{u} = \dfrac{1}{f}$

Here, u = - 100 cm

f = 150 cm

$\dfrac{1}{v} - \dfrac{1}{-100} = \dfrac{1}{150}\\\\v = - 300 \ cm$

Now, magnification is given by :

$m = \dfrac{v}{u} = \dfrac{h_i}{h_o}\\\\h_i = \dfrac{300}{100}\times 1\\\\h_i = 3 \ m$

Therefore, the image height is 3 m or 300 cm.

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2 years ago

A car is moving in uniform circular motion. If the car's speed were to double to keep the car moving with the same radius, the a

Anestetic [448]

Answer:

Increase by a factor of 4.

Explanation:

The acceleration of a car moving with speed v in a circle of radius R is given by:

$a=\frac{v^2}{R}.$

Now if we double the speed $v$ in the equation above, it becomes $2v$ . Thus:

$a=\frac{v^2}{R}\:\: {\rightarrow}\:\: a_n=\frac{(2v)^2}{R}=4\frac{v^2}{R}=4a.$

Therefore the acceleration is increased by a factor of 4.

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3 years ago