Chemistry Middle School

What forces are present in this situation?

An elevator is rising at a constant speed; the elevator is the object in this situation.

gravity

normal, gravity, and tension

gravity and tension

normal and tension

Answers

Answer 1

Answer:

gravity and tension i believe is the answer HOPE THIS HELPED

Explanation:

Answer 2

Gravity and tension sound about right

Related Questions

Which of the following properties can be used as evidence a chemical reaction has occurred? (Select all that apply)

a. Density change
b. Melting point change
c. odor change
d. Color change

Answers

Density, odor, and color changes. Hope this helps ฅ^•ﻌ•^ฅ

A,C,and D are the answers for this question

It was so cold overnight that you notice the next morning that some of your friends are skating on the lake behind your house. Describe what change of state took place in the lake and how energy played a role in the change.

Answers

Answer:

The lake went from a liquid to a solid

Explanation:

Since it was so cold overnight, the temperature of the lake increased to the fact that it turned hard enough to skate on. or The temperature outside was so cold it froze the lake solid

It became so cold during the course of the night, making it hard enough just to skate on. or the lake had frozen completely due to the extreme weather outside.

What is physical state?

one of the key circumstances for the existence of matter. Traditionally, matter may exist in three different states: solid, liquid, or gas. For instance, the same chemical exists in the three different states of ice, liquid water, plus steam.

Plasma, a state of matter that is electrically neutral, is frequently regarded as the final state of matter. The lake's temperature rose because it became so cold during the course of the night, making it hard enough just to skate on. or the lake had frozen completely due to the extreme weather outside.

Therefore, the lake had frozen completely due to the extreme weather outside.

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Why do you think the Na+ ion is smaller than a neutral Na atom? Why do you think the Cl - ion is larger than a neutral Cl atom?

Answers

Answer:

Na+ ion is smaller than a neutral Na atom in the ion there was one more proton which will attract electron bring it closer to the center making the atomic radius smaller. Therefore making a Na+ ion is smaller than a neutral Na atom Explanation:

yes

Are these cells animal cells, or are they or plant cells?

Answers

Answer:

Plant Cells

Explanation:

They are plant cells because of the rectangular structure. Animal cells look 'uglier'.

What is your carbon footprint?

A: the amount of carbon dioxide you use when recycling
B: the amount of oxygen put into the atmosphere due to your consumption of fossil fuels
C: the amount of carbon dioxide and oxygen in the atmosphere at any given time
D: the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuels

Answers

Answer:

Explanation:

According to WHO, a carbon footprint is a measure of the impact your activities have on the amount of carbon dioxide (CO2) produced through the burning of fossil fuels and is expressed as a weight of CO2 emissions produced in tonnes.

The answer would be d.

Please help me por favor :'(

Answers

More volume, takes longer to heat all the molecules.

Which geological feature is caused mainly by glacial erosion? O A. geyser O B. fault line O c. lava flow O D. U-shaped valley

Answers

Answer:

i think it is C

Explanation: hope this helps :)

Answer:

Explanation:

Medical diagnosis and what are common uses of radioactive elements in health care?

Answers

Answer:

nuclear medicine

Explanation:

WHOEVER ANSWERS FIRST GETS BRAINLIST

Answers

The second option! Plant A has more to an B

Match these items.

1. imprint of plant or animal
original-remains fossil
2. undecayed plant or animal part
carbonized fossil
3. replaced by a mineral
petrified fossil
4. only carbon remains
cleavage
5. mountain
geology
6. from magma
metamorphic
7. from physical and chemical changes
igneous
8. sandstone
print fossil
9. helps identify rocks
landform
10. science of Earth
sedimentary

Answers

1. print fossil

2. carbonized fossil

3. petrified fossil

4. cleavage

5. landform

6. igneous

7. metamorphic

8. print fossil

9. geology

10. sedimentary

The print fossil, original-remains fossil, petrified fossil, carbonized fossil, landform, igneous, metamorphic, sedimentary, cleavage, and geology are the respective matches as given in the question.

Print fossil is imprint of plant or animal and basically known as fossil impression. Original-remains fossil comprises of the original tissues and parts of organism and undecayed plant or animal part. Petrified fossil is replaced by a mineral. Carbonized fossil is only carbon remains. Landform is a mountain. Igneous is from magma.

Metamorphic is from physical and chemical changes. Sedimentary rocks are sandstone. Cleavage helps to identify rocks. Geology is the study of science of earth.

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Order the following events in a sequence that most logically describes the movement of water from the ocean to the bottom of a well in a village on the island.

1.infiltration
2.condensation
3.precipitation
4.evaporation

Answers

Answer:

3 ong

Explanation:

The answer is It is 3

A student wants to determine the effect of mass on kinetic energy. She will drop two balls of the same size into a pool of water. Which investigation method should the student use?(1 point)

a. She should drop two balls of the same mass from different Hights.
b.she should drop two balls with different masses from the same Hights
c.she should drop two balls with different masses from different Hights
d.she should drop two balls of the same mass from the same Hights

Answers

I think the answer is C

I believe the correct answer is B. Not only because she wants to test different masses but dropping it for the same hight is the correct way to preform an experiment

What is coevolution? *
A. When two species evolve in response to each other
B. When 2 sub group of the same species evolve at the same time
C. When the environment and the animals within the environment evolve at the same time

Answers

Answer:C

Explanation:

I would say it’s option A.

Hope this helped and have a nice day :)

strike my first letter, i am still the same. strike my next letter,and i am yet still the same.
what 5 letter word am i?

Answers

Answer:

Alone

Explanation:

wait i think

Answer:

Aloneee!!!!

Step to step explanation:

Describe at least one way that builders can mitigate the impact of human activity on Earth's water

Answers

Builders must keep streets and sidewalks near their project clean to reduce harmful runoff discharge. They should also collect and treat water waste produced while working. Construction companies can even treat and repurpose their water waste to minimize pollution

Answer:

Builders can minimize their water pollution and maximize their sustainability by following environmental guidelines set by their federal and local governments and by adopting more environmentally sound practices of their own volition.

Explanation:

Many nations have issued sweeping regulations to preserve clean water.

In the United States, for example, the Clean Water Act places special attention on construction activity where disposal sites may interfere with water and wildlife.

In the EU, the Water Framework Directive requires each state to set objectives related to water standards, monitoring sewage, agricultural use and waste among other concerns.

Read here under "Minamizing Water Pollution" to learn more : https://www.construction21.org/articles/h/how-construction-sites-can-minimize-water-pollution.html

Explain the relationship between work, energy and power

Answers

Answer:

Force exerted on an object over a distance does work. Work can increase energy, and energy can do work. Power is the rate at which work is done.

Explanation:

Work can increase energy, and energy can do work. Power is the rate at which work is done.

During digestion, what happens in the stomach?

A. All food molecules are broken down into smaller molecules by chemical reactions.

B. Some types of food molecules are broken down into smaller molecules by chemical reactions.

C. Water in the food passes into the blood and travels to other organs where it is used.

D. Food passes into the blood and travels to other organs where it is used in various reactions.

Answers

Answer:

Explanation:

Food is digested in the stomach for several hours. During this time, a stomach enzyme called pepsin breaks down most of the protein in the food. The pancreas and gland cells of the small intestine secrete digestive enzymes that chemically break down complex food molecules into simpler ones.

Answer:

Explanation:

Why many cell organelles contain folded or stacked membranes

Answers

Answer:

The many folds result in more surface area for ribosomes to attach and thus allowing protein synthesis to occur at a more efficient rate.

Explanation:

As a cell grows, its volume increases more quickly than its surface area. If a cell was to get very large, the small surface area would not allow enough nutrients to enter the cell quickly enough for the cell's needs.These folds increase the surface area available for transport of materials into or out of the cell.

Carla is making two drinks. She is making one hot chocolate and one chocolate milk. Which best describes the agitation needed to make sure the cocoa powder is mixed in well?

Chocolate milk would require more agitation than hot chocolate does.
Hot chocolate would require more agitation than chocolate milk does.
The would both require the same agitation.
Neither would require any agitation.

Answers

Answer:

A) Chocolate milk would require more agitation than hot chocolate does.

Explanation:

I hope this helps!! Have a good day to the people reading this!!

The best agitation is needed to make sure the cocoa powder is mixed in well is option A) Chocolate milk would require more agitation than hot chocolate does.

What agitation method?

The act or an example of agitating something: a shifting back and forth or with an abnormal, speedy, or violent motion In sweet making, this agitation normally includes running the chocolate back and forth on a marble floor with a large scraper.

What is an instance of agitation?

The definition of agitation refers to the system of moving something forcefully or violently. An instance of agitation is whilst a lake is uneven because of wind. The act of agitating, or the kingdom of being agitated; the state of being moved with violence, or with irregular movement; commotion.

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How to work out the relative mass of potassium? What is the calculation? ( explained very easily )

Answers

Answer:

Explanation:

Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.

Relative Atomic Mass = Mass of one atom
———————————
(1/12)th Mass of one C12 atom

When does a solar Eclipse happen, and how?

Answers

A solar eclipse occurs when a portion of the Earth is engulfed in a shadow cast by the Moon which fully or partially blocks sunlight. This occurs when the Sun, Moon and Earth are aligned.

Answer:

Solar Eclipse happens when the moon gets between the sun and the earth, the moon gets all the light and blocks the earth from getting sunlight.

Hope this helps ;) ❤❤❤

Many systems and technologies have been designed to communicate over long distances. They all send information that has been encoded into a signal. What must a receiver be able to do to understand a signal that is being sent to them?

Answers

The person above me is a very good person hope this helps.

How does it change when it is brought inside a warm house?

Answers

What specifically are you talking about?

how does what change ?

An ice cube is dropped into a glass of water.

What option describes the flow of thermal energy in this case?

Thermal energy flows from ice to water because ice has less mass, Thermal energy flows from ice to water because ice has a lower temperature, Thermal energy flows from water to ice because water has more mass, or Thermal energy flows from water to ice because water has a higher temperature?

Answers

This is because the water has lower temperature than ice so the high concentrated water’s heat will flow to the the ice and the ice will get heated until both of the water and ice come to same temperature and the ice will melt because of thermal energy.

When the ice cube is dropped into water in the glass, thermal energy flows from water to ice because water has a higher temperature. Hence, option D is correct.

What is heat transfer ?

The heat energy will transfer from higher temperature region to lower temperature region. There are different modes of transferring heat namely conduction, convection and radiation.

Conduction takes place in solids and convection is the heat transfer mode in gases and liquids. The thermal energy from a hotter substance will transfer into a a colder object until their final temperature becomes equal.

Here, water is having higher temperature and ice is cold. Hence, thermal energy will flows from water to ice. Thus, water temperature increases and ice starts melting by absorbing the temperature.

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200 mL of a 25% m/V solution were diluted to attain a concentration of 20.8% m/. How much water was added to the solution?

Answers

Answer:

2.3 M

Explanation:

sorry for it being 4 hours late lol

2.3m bcudjdjejejrjdhbdbdbdbdbd

please tell if this right!if not please answer with correct answers

Answers

Yes I’m. 80% sure that it’s right

Answer:

Yes, you are correct

Explanation:

Nice job :)

When the speed of the bottle is 2 m/s, the KE is kg m2/s2. When the speed of the bottle is 3 m/s, the KE is kg m2/s2. When the speed of the bottle is 4 m/s, the KE is kg m2/s2. When the speed of the bottle is 5 m/s, the KE is kg m2/s2. When the speed of the bottle is 6 m/s, the KE is kg m2/s2.
instructions
In this part of the experiment, you will be changing the speed of the bottle by dropping it from different heights. You will use the same mass, 0.250 kg, for each trial, so record this mass in Table B for each velocity. Then, calculate the expected kinetic energy (KE) at each velocity. Use the formula KE = mv2,
where m is the mass and v is the speed. Record your calculations in Table B of your Student Guide.

Answers

Answer:

Based on the given instructions, you need to calculate the expected kinetic energy (KE) at each velocity using the formula KE = mv^2, where m is the mass and v is the speed. The mass is given as 0.250 kg.

Table B: Calculation of Kinetic Energy (KE)

Speed (m/s)Mass (kg)KE (kg m^2/s^2)20.2500.50030.2500.75040.2501.00050.2501.25060.2501.500

To calculate the kinetic energy at each velocity, multiply the mass (0.250 kg) by the square of the velocity.

For example, when the speed of the bottle is 2 m/s: KE = (0.250 kg) * (2 m/s)^2 = 0.250 kg * 4 m^2/s^2 = 1.000 kg m^2/s^2

Perform similar calculations for the other velocities and record the results in Table B.

Answer:

Explanation:mass of the bottle in each case is M = 0.250 kg

now as per given speeds we can use the formula of kinetic energy to find it

1) when speed is 2 m/s