PHYSICS HIGH SCHOOL

The energy derived from the digestion of food is __________.a. kinetic energy
b. inertia
c. momentum
d. chemical energy

Answers

Answer 1
Answer:

By definition, we have to:

Digestion is the transformation of foods that are ingested into simpler substances to be absorbed.

Digestion has different processes:

1) Mechanical processes to reduce the size of food.

2) Chemical processes to reduce the size of the particles and prepare them for absorption.

Therefore, the energy derived from the digestion process is the chemical energy.

Answer:

The energy derived from the digestion of food is chemical energy.
Answer 2
Answer:

Answer: Chemical energy

Explanation:  

Digestion is a chemical process where glucose burns in presence of oxygen producing energy which helps us to perform work and liberating carbon-dioxide and water. The carbon-dioxide is exhaled out.  

C₆H₁₂O₆ (Food) + O₂ →  CO₂ +H₂O+ Energy

Thus, through digestion chemical energy is obtained as old bonds are broken to form new bonds through a chemical process.

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Power is transmitted great distances at ______ voltage and ______ current. a low, medium b high, medium c high, low d low, high

Answers

The correct answer to the question stated above is letter c, high, low.

Power is transmitted great distances at high voltage and low current. 

>The reason why  electrical energy transmitted at high voltage and low current is :  so that huge amount of power can be delivered at long distances by using only small size of wires.

The _____ theory is the most accepted theory regarding the origin of the solar system. It suggests that our star, the Sun, was first created by a cloud of dust and gas.

Answers

The Nebular Hypothesis is the most accepted explanation of the origin of our solar system. It states that the Sun was formed by a massive cloud of dust and gas light-years across, and it was bigger than the actual sun itself. Most of the mass in the center formed the sun, and the rest expanded outward.

A. Nebular is the answer

Human impacts on biomes are best characterized by _______

Answers

Answer;

-Interruption of natural biome processes

Explanation;

-Human beings have continuously continued with interference of different biomes and thus bringing various modifications to these biomes. Human activities often affect ecosystems in negative ways because human systems are not closed loop systems. For example; human waste enters other natural ecosystems, where it can cause them to become unbalanced

-If efforts are not enhanced in conserving the natural world, we shall continue experiencing deteriorating weather factors like the global warming. Failure to conserve our biosphere will ultimately hurt the human race, together with organisms in various biomes.

Final answer:

Human impacts on biomes include changes in biodiversity, alterations in ecosystem structure, and climate change. These impacts stem from human activities like deforestation, mining, pollution and the emission of greenhouse gases.

Explanation:

Human impacts on biomes are best characterized by changes in biodiversity, alterations in ecosystem structure, and climate change. The significant increase in human population and activities such as deforestation, mining, and pollution lead to biodiversity loss and habitat destruction. These activities collectively trigger alterations in the ecosystem structure. Additionally, human-induced emissions of greenhouse gases contribute to global climate change, which further disturbs the biomes - the various life zones on Earth. Therefore, the major human impacts on biomes include changes in biodiversity, ecosystem structure alterations, and climate change.

Learn more about Human impacts on biomes here:

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A 2.0-kilogram mass is located 3.0 meters abovethe surface of Earth. What is the magnitude of
Earth’s gravitational field strength at this
location?
(1) 4.9 N/kg (3) 9.8 N/kg
(2) 2.0 N/kg (4) 20. N/kg

Answers

The correct answer is: Option (3) 9.8 N/kg

Explanation:

According to Newton's Law of Gravitation:

F_g = (GmM)/(R^2) --- (1)

Where G = Gravitational constant = 6.67408 × 10⁻¹¹ m³ kg⁻¹ s⁻²

m = Mass of the body = 2 kg

M = Mass of the Earth = 5.972 × 10²⁴ kg

R = Distance of the object from the center of the Earth = Radius of the Earth + Object's distance from the surface of the Earth = (6371 * 10³) + 3.0 = 6371003 m

Plug in the values in (1):

(1)=> F_g = (6.67408 * 10^(-11) * 2 * 5.972*10^(24))/((6371003)^2) = 19.63

Now that we have force strength at the location, we can use:

Force = mass * gravitational-field-strength

Plug in the values:

19.63 = 2.0 * gravitational-field-strength

gravitational-field-strength = 19.63/2 = 9.82 N/kg

Hence the correct answer is Option (3) 9.8 N/kg
(3) 9.8 N/kg is your answer.

Please can some one explaine fore me What is work done

Answers

In Physics, 'work' has a very clear definition:

It's (strength of a force) times (distance through which the force acts).

'Work' has the units of Energy.

If you push against a shopping cart with 30 newtons of force, and
you keep pushing while the cart moves 4 meters, then you have
done (30 x 4) = 120 newton-meters of work = 120 "Joules". 

A net force of 40 N south acts on an object with a mass of 20 kg. What is the object's acceleration? (Hint: Use the formula a = 771​

Answers

Answer:

2m/s2 south

Explanation:

Trust

Answer:

a = 2m/S2 south

Explanation:
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