3 years ago

Why did early organisms evolve eyes that could process visible light?

1 answer:

3 0

Scientists think the earliest version of the eye was formed in unicellular organisms, who had something called 'eyespots'. These eyespots were made up of patches of photoreceptor proteins that were sensitive to light. ... Over time, the unicellular creature would evolve, and its eyespot evolved along with it.

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If you take a bar magnet with both n & s poles and cut it in half, you get

creativ13 [48]

I think you get half of the magnetic field and that means half the power of the magnetic field.

7 0

3 years ago

Indicate whether the statement is true or false. Any force that causes an object to move in a circular path is called a centripe

Anna35 [415]

True, the definition of "centripetal force" is <span>a force that acts on a body moving in a circular path and is directed toward the center around which the body is moving.</span>

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3 years ago

5. If x = 0.6 and y = 5, the value of 2(xy)^3 is...

taurus [48]

Explanation:

=2(0.6 * 5)³

=2( 3 )³

=2(27)

=54

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3 years ago

Read 2 more answers

1. Which statement is true about natural

lara [203]

Answer:

1. D. They can be a substance, material, object or source of energy.

2. B. The properties will be different.

3. C. When two reactants form one product, the reaction is spontaneous.

4 0

3 years ago

A wheel is rotating freely at angular speed 420 rev/min on a shaft whose rotational inertia is negligible. A second wheel, initi

Mashcka [7]

Answer:60 rev/min

Explanation:

Given

angular speed of first shaft $\omega _1=420\ rev/min$

Moment of inertia of second shaft is seven times times the rotational speed of the first i.e. If I is the moment of inertia of first wheel so moment of inertia of second is 7 I

As there is no external torque therefore angular momentum is conserved

$L_1=L_2$

$I_1\omega _1=I_2\omega _2$

$I\times (420)=7 I\times (\omega _2)$

$\omega _2=\frac{420}{7}$

$\omega _2=60\ rev/min$

8 0

4 years ago