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Dafna1 [17]
3 years ago
4

which activity directly converts energy from the sun into chemical energy? a.a snake lying on a sunny rock to keep warm b.a rabb

it using energy from food it has eaten to run c.a bean plant making its own food to grow d.a person burning firewood to cook food
Physics
2 answers:
cestrela7 [59]3 years ago
8 0
<span>The only example listed that one can really describe as the DIRECT conversion of solar energy into chemical is option C. ie the bean plant making its own food grow</span>
larisa86 [58]3 years ago
3 0
The only example listed that one can really describe as the DIRECT conversion of solar energy into chemical is:

C. the bean plant making its own food grow.

Concept:

Seeds wait to germinate till 3 desires are<span> fulfilled:

Water, correct temperature, and </span>a decent<span> location such as in soil.

Th</span>roughout<span> its early stages of growth, the </span>spermatophyte depends<span> upon the food </span>provides hold on<span> with it </span>within the<span> seed </span>till it's giant<span> enough for its own leaves </span>to start creating<span> food through </span>the chemical change<span>.</span>
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The mass of an electron is about 9.11 × 10-31 kg. Write this as a whole number
galina1969 [7]

Answer:

1 electron has a mass of 9.1 X 10-31 kg. How many electrons n does it take to make 1 kg?

(1 e)/(9.1 X 10-31 kg) = n/(1 kg)

So, n = 1.10 X 1030 electrons

Each electron has a charge of 1.6 X 10-19 C, where C stands for Coulombs. So, the n electrons have a charge of q = ne = (1.10 X 1030 electrons) X (1.6 X 10-19 C/electron) = 1.76 X 1011 C. This is an insane charge!

The electrostatic force between two of these 1kg bundles of electrons is given by Coulomb's law:

F = k qq/r2 = (8.99 X 109)(1.76 X 1011 C)2/(1000 m)2 = 2.78 X 1026 N.

7 0
3 years ago
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A ball is thrown straight up. It passes a 2.00-m-high window 7.50 m off the ground on its path up and takes 0.312 s to go past t
marta [7]

Answer:

Explanation:

Given that

The window height is 2m

And the window is 7.5m from the ground

Then the total height of the window from the ground is 7.5+2=9.5m

It takes the ball 0.32sec travelled pass the window.

When the ball get to the window, it has an initial velocity (u') and when it gets to the top of the window it has a final velocity ( v')

Now using the equation of free fall during this window travels

S=ut-½gt² against motion.

S=2, g=9.81, t=0.32sec

Then,

S=u't-½gt²

2=u'×0.32-½×9.81×0.32²

2=0.32u'-0.5023

2+0.5032=0.32u'

Then, 0.32u'=2.5032

u'=2.5032/0.32

u'=7.82m/s

This is the initial velocity as the ball got the the window

Now, let analyse from the window bottom to the ground which is a distance of 7.5m

Using the equation of free fall again

v²=u²-2gH

In this case the final velocity (v) is the velocity when the ball reach the bottom of the window i.e u'=7.82m/s,

While u is the original initial velocity from the throw of the ball

Then,

u'²=u²-2gH

7.82²=u²-2×9.81×7.5

61.146=u²-147.15

61.146+147.15=u²

Then, u²=208.296

So, u=√208.296

u=14.43m/s

The initial velocity of the ball form the throw is 14.43m/s

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3 years ago
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Answer:

there are 22 massive, positively charged, fundamental particles in the element's nucleus. Given this, the element is unquestionably titanium.

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castortr0y [4]

Explanation:

Remember Newton's Second Law.

F=ma

If the force acting on both bikers is the same, we can look at the relationship between acceleration and mass.

If Biker 1 has a mass of 10kg and Biker 2 has a mass of 20kg, and both are being acted upon by a force of 100 N, let's see what that looks like. 100 = 10*a_1 \rightarrow a_1 = 100/10 = 10

100 = 20 *a_2 \rightarrow a_2 = 100/20 = 5

So, given the same force, an object with GREATER mass will have less acceleration.

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The answer is B. Ur welcome
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