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4 years ago

9

Why do plants produce their own food

2 answers:

Serhud [2]4 years ago

7 0

Because way back, when there were some kinds of plants that made
their own food, and other kinds of plants that depended on dinosaurs or
people to bring them food, guess which ones starved and became extinct,
and which ones lived and are still among us today.

liberstina [14]4 years ago

7 0

Thats how the plant stays alive, it produces its own nutrients

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As his socks tumbled in the dryer, they became charged. If a small piece of lint with a charge of +1.25 E -19 C is attracted to

qwelly [4]

Answer:

$2.4\cdot 10^{10}N$

Explanation:

When an electric charge is immersed in an electric field, it experiences a force given by the equation

$F=qE$

where

q is the charge

E is the magnitude of the electric field

In this problem, we have:

$q=+1.25\cdot 10^{-19}C$ is the charge on the small piece of lint

$F=3.0\cdot 10^{-9}N$ is the force experienced by the charge

Therefore, we can find the magnitude of the electric field by re-arranging the equation and solving for E:

$E=\frac{F}{q}=\frac{3.0\cdot 10^{-9}}{1.25\cdot 10^{-19}}=2.4\cdot 10^{10}N$

5 0

4 years ago

What effect does observing a substance's physical properties have on the substance

Phoenix [80]

It can be observed without changing the identity of the object.

4 0

4 years ago

At a distance of 41 ft , an ionizing radiation source delivers 5.0 rem of radiation. How close could you get to the source and s

mash [69]

Answer:

at distance 18.33 ft no biological effects

Explanation:

given data

distance = 41 ft

radiation = 5 rem

to find out

how close get so no biological effects

solution

we know here that intensity of radiation R is inversely proportional to (radiation)²

so here equation will be

$\frac{I1}{I2} = (\frac{R2}{R1})^{2}$ .............1

here I is intensity

so here I1 = 25

because for 0 to 25 there is no detectable effects and for 25 to 100 it will . temporary decrease so

we take 25 because dose is less than 25 so we take that highest value

so

$\frac{I1}{I2} = (\frac{R2}{R1})^{2}$

$\frac{25}{5} = (\frac{41}{R1})^{2}$

R1 = 18.33 ft

so at distance 18.33 ft no biological effects

6 0

3 years ago

The catastrophic event shown in this picture formed over water, produced high winds and heavy rains, and brought a large storm s

maksim [4K]

The answer is a hurricane bc water spout is not a natural disaster and the other options don’t need water

5 0

3 years ago

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Which of the following shows the abbreviation for an SI unit of density? kg/m2 g/cm g/cm3 lb/mL

Ymorist [56]

the answer is g/cm^3

7 0

3 years ago

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