Which model below would best describe the digestive system?a long hollow tube with openings at both ends
a small swimming pool
a candle stick
a water balloon tied at the top

Answers

Answer 1

Answer:
if it were me I would use the long hollow tube with opening at the end

Answer 2

Answer: I'd say a long hollow tube with a hole at the end.
Hope this helps! :)

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The rapid movement of gases molecules can be explained because gases have ___ size particles and exert _____ attraction for other gas particles.

Answers

Answer:

The correct answer is D. small, little

Explanation:

The rapid movement of gases molecules can be explained because gases have smallsize particles and exert littleattraction for other gas particles.

hope this helps :)

1. small size particles

2.exert little attraction

What does the number next to isotopes signify?

Answers

The number next to isotopes signifies the sum of the number of protons plus the number of neutrons in the nucleus of an atom. An isotope is a version of an atom that has the same number of protons but different numbers of neutrons. Isotopes are very important in nuclear chemistry. A proton is a is a particle in the nucleus of an atom that has a positive charge. A neutron is also a particle in the nucleus of an atom, but it does not have an electric charge.

Cu + AgNO3 = Cu(NO3)2 +Ag

Answers

The problem is that you have to balance Cu + AgNO3 = Cu(NO3)2 + Ag

The first step is to identify all the elements and how many atoms of that element there are on either side of the equals sign.
When you do this you will get,

1 Cu 1
1 Ag 1
1 N 2
3 O 6

Next step is to make sure that all the elements are the same on both sides. This is mostly trial and error until you balance both sides.

The solution to the equation would be:

Cu + 2AgNO3 = Cu(NO3)2 + 2Ag

So now if you check your elements, you will get the following:

1 Cu 1
2 Ag 2
2 N 2
6 O 6

As you can see all the elements are equal on both sides, so the equation is balanced.

What would probably happen if you poured a liquid onto a solid table

Answers

The water would just spread out on the table mainly because of van der waal forces, but it would stop eventually because of surface tensile forces.

What is surface tension?

Surface tension is a force which tends to maintain the tension in water surface due to surface tension insects moves on the surface of water. It is a force which act in outward direction. S.I unit of surface tension is Newton-meter.

Surface tension is a physical quantity which is vector quantity i.e it has both magnitude and direction.

Mathematically,

Surface tension is reciprocal of force per unit length it means that force which act in a one meter length is called surface tension.

Force is defined as a phenomena which try to displace any object or it try to move an object from one point to another point. S.I unit of force is Newton. It is vector quantity i.e it has a both magnitude and direction.

Therefore,The water would just spread out on the table mainly because of van der waal forces, but it would stop eventually because of surface tensile forces.

Learn more about molecules here:

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The water would just spread out on the table mainly because of van der waal forces, but it would stop eventually because of surface tensile forces.

What is Hund’s Rule?

Answers

every orbital in a subshell is singly occupied with one electron before anyone orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin.

The softest mineral in the Mohs hardness scale is?