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1 year ago

Which pathway is the foundation for the majority of ecosystems and food chains on earth?

Physics

1 answer:

maw [93]1 year ago

6 0

Photosynthesis is the foundation of majority of ecosystems and food chains on earth .

What is photosynthesis ?

Photosynthesis is a process by which green plants , algae and certain bacteria turn sunlight ,carbon dioxide and water into food (sugar) and oxygen.

In this process light energy converted into chemical energy ,which is later used to fuel cellular activities .

Equation of photosynthesis :

6CO2 + 6H2O —> C6H12O6 + 6O2

Photosynthesis depends upon the factors like light intensity, the concentration of carbon dioxide ,temperature, water, and pollution .

photosynthesis takes place in the cell organelles called chloroplasts . these organelles contains a green coloured pigment called chlorophyll, which is responsible for the characteristic green colouration of the leaves.

What is ecosystem ?

An ecosystem is defined as a community of lifeforms in concurrence with components , interacting with each other .

It is the functional and structural unit of ecology where living organisms interact with each other and the surrounding environment .it is a chain or interaction between organisms and their environment.

Ecosystem term was first coined by A.G Tansley in 1935.

The structure of an ecosystem is characterised by the organisation of both biotic and abiotic components .

What is food chain?

A food chain refers to the order of events in an ecosystem ,where one living organism eats another organisms and later that organism is consumed by another larger organisms .the flow of nutrients and energy from one organism to another takes place at different trophic levels .ecosystem also explains the feeding pattern between living organisms.

Every levels of food chain is known as trophic level .

Food chain has 4 major parts like sun ,producers ,consumers,and decomposers.

Learn more about Photosynthesis here

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Question 7

DedPeter [7]

AnswDIVID THEN SEMPFL THEN GRT 80.8

Explanation:

8 0

3 years ago

The block has a weight of 75 lblb and rests on the floor for which μkμk = 0.4. The motor draws in the cable at a constant rate o

WINSTONCH [101]

The given question is incomplete. The complete question is as follows.

The block has a weight of 75 lb and rests on the floor for which $\mu k$ = 0.4. The motor draws in the cable at a constant rate of 6 ft/sft/s. Neglect the mass of the cable and pulleys.

Determine the output of the motor at the instant $\theta = 30^{o}$ .

Explanation:

We will consider that equilibrium condition in vertical direction is as follows.

$\sum F_{y} = 0$

N - W = 0

N = W

or, N = 75 lb

Again, equilibrium condition in the vertical direction is as follows.

$\sum F_{x} = 0$

$T_{2} - F_{k}$ = 0

$T_{2} = \mu_{k} N$

= $0.4 \times 75 lb$

= 30 lb

Now, the equilibrium equation in the horizontal direction is as follows.

$\sum F_{x} = 0$

$T Cos (30^{o}) + T Cos (30^{o}) = T_{2}$

$2T Cos (30^{o}) = T_{2}$

or, T = $\frac{T_{2}}{2 Cos (30^{o})}$

= $\frac{30}{2 Cos (30^{o})}$

= $\frac{30}{1.732}$

= 17.32 lb

Now, we will calculate the output power of the motor as follows.

P = Tv

= $17.32 lb \times 6$

= $103.92 \times \frac{1}{550} \times \frac{hp}{ft/s}$

= 0.189 hp

or, = 0.2 hp

Thus, we can conclude that output of the given motor is 0.2 hp.

3 0

3 years ago

Read 2 more answers

What is weight? and what is mass

777dan777 [17]

Hey :)

Weight is the force acting on the object due to gravity.

Mass is the measure of the quantity of matter that a body or an object contains

Hope this helps :)

3 0

3 years ago

Which statement best describes the energy of activation?

Varvara68 [4.7K]

hi <3

i believe the answer would be D, as when the temperature increases the particles have more energy and can overcome the activation energy more rapidly.

hope this helps :)

4 0

3 years ago

Under what condition is the instantaneous acceleration of a moving body equal to its average acceleration over time?

Rzqust [24]

If the acceleration is constant (negative or positive) the instantaneous acceleration cannot be

Average acceleration: [final velocity - initial velocity ] /Δ time

Instantaneous acceleration = d V / dt =slope of the velocity vs t graph

If acceleration is increasing, the slope of the curve at one moment will be higher than the average acceleration.

If acceleration is decreasing, the slope of the curve at one moment will be lower than the average acceleration.

If acceleration is constant, the acceleration at any moment is the same, then only at constant accelerations, the instantaneuos acceleration is the same than the average acceleration.

Constant zero acceleration is a particular case of constant acceleration, so at constant zero acceleration the instantaneous accelerations is the same than the average acceleration: zero. But, it is not true that only at zero acceleration the instantaneous acceleration is equal than the average acceleration.

That is why the only true option and the answer is the option D. only at constant accelerations.

3 0

4 years ago