Chemistry Middle School

Help me, I don't understand :(

Help Me, I Don't Understand :(

Answers

Answer 1

Answer:

Hi! I think it would be B. (Balloon energy is negative, wall energy is positive.)

Explanation:

{Hope this helps} <3

-Addi

Answer 2
your answer should be the first one. :) the reasoning behind this is because the “+”s represent attraction and the “-“‘s represents repulsion. if you think about rubbing the balloon on a shirt, that creates static which is attraction (the “+”’s on the balloon) the wall also has “+”’s because they are both attracted to eachother, which is why they stick to one another. i hope this helps!!!

Related Questions

what are the first 3 rules that Newton made??

Answers

Answer:

Newton's Laws of Motion

Explanation:

1st- Inertia- every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.

2nd- The second law states that the greater the mass of an object, the more force it will take to accelerate the object

3rd- action reaction- If the forces are equal in opposite directions, the object will not move. The forces cancel each other out so that the acceleration is zero. If one force acting in one direction is greater than the force acting in the opposite direction, the object will move.

If a 3.0 picogram (pg) sample of curium-245 has a half-life of 8500 years, which conclusion can be drawn?
A: The curium-245 sample must have an age of at least 8500 years.
B: The curium-245 sample must have an age of less than 8500 years.
C: The curium-245 sample will have a mass of about 6.0 pg after 8500 years.
D: The curium-245 sample will have a mass of about 1.5 pg after 8500 years.

Answers

Answer:

its A

Explanation:

If a 3.0 (pg) sample of curium-245 has a half-life of 8500 years, then the conclusion which can be drawn is the curium-245 sample will have a mass of about 1.5 pg after 8500 years

What is half life time?

Half life time is that time after which initial concentration of reactant becomes half of the initial.

Given that initial concentration of curium-245 = 3pg

After half life time concentration of curium-245 = 1.5pg

The curium-245 sample must have an age of at least 8500 years is wrong as given time is the half life time.The curium-245 sample must have an age of less than 8500 years is wrong as given time is the half life time.The curium-245 sample will have a mass of about 6.0 pg after 8500 years is alo wrong as left sample shold be half of the initial.

Hence, the curium-245 sample will have a mass of about 1.5 pg after 8500 years is the conclusion.

To know more about half life time, visit the below link:

https://brainly.com/question/2320811

#SPJ2

One student rubs a balloon against his hair several times. Another student passes a comb through her hair several times. The students place the comb near the balloon and observe that the comb repels the balloon. Which is the most likely reason the comb can repel the balloon?
A) The balloon has a positive charge and the comb is neutral.
B) The balloon and the comb have the same electrical charge.
C) The balloon has a negative charge and the comb is neutral.
D) The balloon and the comb have opposite electrical charges.

Answers

The balloon and the comb have the same electrical charges!

Explanation:

{Hope this helps! <3}//

-Addi

Answer:

B: They have the same electrical charge

Explanation:

Which animal can leave its eggs to hatch and does not need to take care of the infants?


sea turtles


ducks


penguins


platypus

Answers

Sea turtles they leave them on the beach
Sea turtles, penguins hold them in a pouting, ducks keep them around sea turtles leave them

Which diagram represents an electrically neutral atom​?

Answers

Answer:

D

Explanation:

I hope this right, I'm sorry if it's not.

For an atom to be neutral, it has to have the same amount of protons and electrons. Because protons and electrons have opposite charges, when there is an equal amount of them they balance each other out

The diagram that represents an electrically neutral atom is:

Option D

What is an electrically neutral atom?

Whenever a molecule has an equivalent number of electrons and protons, it has an equivalent number of -ve electric charges (the electrons) and +ve electric charges (the protons). The all-out electric charge of the 0 is thusly zero and the particle is supposed to be unbiased.

Thus, option D is correct.

Find more information about Neutral atom here:

brainly.com/question/24652228

Scientists around the world all use a standard system of measurement called the metric system. Why? Question 2 options:

A. because every country speaks the same language

B. so scientists can communicate with each other about data without confusion

C. every country (including the United States) uses the metric system

Answers

Answer:

B

Explanation:

The metric system is considered to be the universal language when it comes to math/science.

B because not all sciences speak the same language yea but they can understand each other’s work or data.

Is this a chemical reaction or not? Explain why you think so (Be sure to answer both parts of the question)

Answers

Answer:

1. No 2. Yes 3. Yes

Explanation:

One is a physically. The other deals with an not reversible change

GIVING BRAINLIEST FIVE STARS AND HEART!
In your own words explain the difference between potential energy and kinetic energy. Give an example of how one can be transformed into the other.

Answers

Explanation:

When an object is at rest, the body is said to possess potential energy. In another case, when the object is in motion, then it is said to possess kinetic energy. Potential energy tends to affect the object within the environment if and only when it gets transformed to other kinds of energy.

Which label belongs in the area marked W?

Answers

Answer:

A) are called "true" bacteria

PLS HELP THIS IS ACTUALLY SCIENCE BUT PLS HELP
What is the greenhouse effect?

Answers

Answer:

the greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases. ... The absorbed energy warms the atmosphere and the surface of the Earth.

Answer: It’s the process of the sun’s radiation in the earths atmosphere warms the surface of the planet.

The word igneous comes from the Latin word for fire. However, the name is inaccurate. The rocks are not created with flames. Instead, they are created when magma cools and hardens. Magma is hot molten rock found deep in the earth. Igneous rock is either intrusive or extrusive. It is intrusive when it forms inside the earth's crust. It is extrusive when it is formed above the earth's surface.

Select the sentence from the passage that supports the idea that temperature is an important factor in the formation of igneous rock.
Question 10 options:

Instead, they are created when magma cools and hardens.

The word igneous comes from the Latin word for fire.

Magma is hot molten rock found deep in the earth.

It is intrusive when it forms inside the earth's crust.

Answers

Instead, they are created when magma cools and hardens —> the temperature contributes as the magma would be at extreme heat while it need a cooler temperature to harden and mold

Answer:

Instead, they are created when magma cools and hardens —> the temperature contributes as the magma would be at extreme heat while it need a cooler temperature to harden and mold

Explanation:

A car travels along a road at a steady speed of 60 mph. How far will it travel in 6 hours?

HINT:

* 60 is the speed

* 6 is the time

What calculation do you use to complete this problem?

its sci ]
HELPPP ASAP!!!!!!

Answers

360 milessssssssssssssssssssssss

Answer:

360

Explanation:

60x6=360

The magma inside of a volcano slowly cooled into rock. Over time, wind and water wore away the weaker rock surrounding it. The landform left at Earth's surface is made of

A. igneous rock
B. metamorphic rock
C. sedimentary rock
D. fertile soil

Answers

Answer:

the correct answer is igneous rock

Igneous rock is formed through the cooling and solidification of magma or lava.

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