(Science and 15 points) Which of the following processes produces food?A. Excretion
B. Photosynthesis
C. Reproduction
D. Respiration

Answers

Answer 1

Answer:

The answer is B. Photosynthesis

Answer 2

Answer: The answer to you question is B (photosynthesis) because it transfers light into food.

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If a mole of hydrogen reacts with a mole of oxygen to produce water, what is the excess reactant?

Answers

Answer:

Oxygen is the excess reactant.

Explanation: A simple balanced chemical equation for the production of water, will show:

2H2 + O2 -----> 2H20

2 : 1 2

From this, we can see that 2 moles H2 react with 1 mole of O2 to produce 2 moles of H2O. That is to say, hydrogen reacts with oxygen in the ratio 2:1

Also if 1 mole of H2 is needed to produce water, it will require 1/2 mole of O2 to react with.

Since we know this, we can tell from our question that 1 mole of H2 will react with 1/2 mole of O2 and be left with 1/2 mole of O2 as excess.

We can have a chemical equation for this as:

1/2H2 + O1/2 ------> 1/2H2O

1 : 1/2

Therefore, the H2 can be said to be the limiting reactant (gets consumed when the reaction is completed) while the oxygen is the excess reactant.

Answer:

there is no excess

Explanation:

Which region of the electromagnetic spectrum is used by doctors to view the skeletal structure of the human anatomy?

Answers

The correct answer would be:

X-RAYS

its x-rays i did the quiz

Which of the following objects is NOT a part of our solar system? A. the North Star B. the dwarf planet Pluto C. the asteroid belt D. Jupiter’s moons

Answers

Of the items on the list, only choice A. (The North Star) is not a part of our solar system. The items in our solar system are those objects that orbit our Sun and are enclosed inside the Oort Cloud. The North Star (named Polaris) is a star located quite some distance away from the Earth.
Hope that helped! =)

The answer is A because the North Star is a star and stars are suns not in our solar system. Hope this helped!

What is the difference between a"characteristic” and a “trait"? Give an example of
each.

Answers

A trait is like a quality and a characteristic is something that makes you different from others, it’s like a unique attribute. For exemple the sound of your laugh if you have a weird one could be a characteristic.

Which of the following energy changes occurs as a bow is drawn and released?1. gravitational potential to chemical potential
2. magnetic potential to kinetic
3. elastic potential to kinetic
4. kinetic to thermal

Answers

Answer: The correct answer is 3.

Explanation: As the bow is drawn and released, it will experience a change in elastic potential energy to kinetic energy.

Elastic potential energy is defined as the amount of potential energy which is stored as a result of the deformation of the object which has some elasticity in it. For Example: Stretching of a spring, Drawing of a bow, etc..

Kinetic energy is the energy of the object which is possessed as a result of its motion.

When the bow is drawn, it first had some elastic potential energy and when it is released it had some kinetic energy in it.

Conclusion: The correct answer is 3.

3. elastic potential to kinetic
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