Describe the energy changes occurring of a glass of ice water and a glass of water

QUESTION POSTED AT 14/02/2020 - 03:45 PM

Related questions

The correct answer is c. Energy processing from corn biofuels is not energy efficient.

Exellent!!!!!!!!!!!!!!

ANSWERED AT 28/02/2020 - 05:17 PM


QUESTION POSTED AT 28/02/2020 - 05:17 PM

According to recent research, ice skaters are able to glide smoothly across the ice because A. ice is constantly subliming to form a layer of water vapor B. a thin, liquid-like layer of water covers the ice C. pressure from the skates raises the melting point of ice D. pressure from the skates lowers the melting point of ice

Answer:

B. A thin, liquid-like layer of water covers the ice

Explanation:

Hello,

Ice skaters are able to glide smoothly across the ice because a thin, liquid-like layer of water covers the ice, this is achieved due to the environmental conditions which allow the liquid water layer to coexist with the ice. Due to this fact, the liquid-like layer diminishes the friction coefficient between the ice skateboard and the ice allowing the slip to be carried out smoothly.

Best regards.

ANSWERED AT 28/02/2020 - 05:05 PM


QUESTION POSTED AT 28/02/2020 - 05:05 PM

Which piece of equipment would be most useful for measuring the volume of some water?

A graduated cylinder. :)

ANSWERED AT 28/02/2020 - 05:00 PM


QUESTION POSTED AT 28/02/2020 - 05:00 PM

Amino acids cannot be broken down to provide energy.

False, Dietary proteins are first broken down to individual amino acids by various enzymes and hydrochloric acid present in the gastro-intestinal tract. These amino acids are further broken down to α-keto acids which can be recycled in the body for generation of energy, and production of glucose or fat or other amino acids.

ANSWERED AT 28/02/2020 - 04:42 PM


QUESTION POSTED AT 28/02/2020 - 04:42 PM

Acid mine drainage is formed when water flows past exposed rocks that leach out ______________________ that react with water and oxygen to form

Acid mine drainage is formed when water flows past exposed rocks that leaches out sulfates that react with water and oxygen to form. Sulfate is the answer which means that a salt or it is sulfuric acid. This polyatomic anion is part of our everyday life.

ANSWERED AT 28/02/2020 - 04:42 PM


QUESTION POSTED AT 28/02/2020 - 04:42 PM

Nuclear energy is produced when scientists force uranium (U) atoms to break apart. With this in mind, examine the list below. If scientists were to break apart each of the items on the list, which items would still be classified in the same way? Which items would be classified differently? • atoms • elements • compounds • molecules • matter

Answer:

Compound.

Explanation:

A compound is a made up of two or more than two different elements. It can be broken down into smaller molecules.Elements are combined to form a compound by chemical bonding like ionic bonding and covalent bonding.

Different compounds of different elements can be broken down into the chemical reaction called decomposition reaction. For example:

Using electrolysis, we can break down water into its elements hydrogen and oxygen.    

ANSWERED AT 28/02/2020 - 04:06 PM


QUESTION POSTED AT 28/02/2020 - 04:06 PM

What happens to the temperature of water between the time ice melts and water boils (this is partially quoted from a question)? Also, what change occurs in temperature after water starts boiling (this is also from a booklet)? Thank you and please explain your thoughts. This is based on the phase changes of water, and you should refer to a graph on the phase changes of water.

Your first statement is very ambiguous so I will give it the best shot as to what you are saying.
The temperature, between the point of ice melting and water boiling, is increasing as water is in its liquid state.
Now during a phase change, or while the water is boiling, the temperature remains constant because the energy being added is being consumed to complete the phase change.
But if you're looking at the phase change graph, the points of positive slopes, are moments when energy is increasing as the water, in whatever state, is increasing. But when the slope of the graph is 0, the water is changing phases and the temperature remains constant! I hope I explained that so you could understand it, and I hope this helps you!

ANSWERED AT 28/02/2020 - 03:47 PM


QUESTION POSTED AT 28/02/2020 - 03:47 PM

Describe four ways you could increase the rate of a chemical reaction.

1. Increase the temperature  

2. Increase the pressure of an reacting gas  

3. Solid reactants are broken into smaller pieces

4. The concentration of a dissolved reactant is increased.

ANSWERED AT 28/02/2020 - 03:06 PM


QUESTION POSTED AT 28/02/2020 - 03:06 PM

During a chemical reaction, energy is converted from one form to another increases decreases is used up as bonds are broken and formed

Is used up as bonds are broken and formed .

ANSWERED AT 28/02/2020 - 03:02 PM


QUESTION POSTED AT 28/02/2020 - 03:02 PM

Which of the following is not one of the three ingredients needed to form a cloud? dust or solid matter of some sort water molecules wind temperature and pressure changes

I think is wind(not needed in the formation of cloud).

ANSWERED AT 28/02/2020 - 02:57 PM


QUESTION POSTED AT 28/02/2020 - 02:57 PM

The specific heat of nickel is 0.44 J/g*⁰C. How much energy needed to change the temperature of 95.4g of nickel from 22⁰C to 32⁰C. Is the energy absorbed or released?

Answer : The amount of energy needed is, 419.76 J and the energy is absorbed.

Solution :

Formula used :

Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})

where,

Q = heat gained or absorbed = ?

m = mass of nickel = 95.4 g

c = specific heat of nickel = 0.44J/g^oC      

\Delta T=\text{Change in temperature}  

T_{final} = final temperature = 32^oC

T_{initial} = initial temperature = 22^oC

Now put all the given values in the above formula, we get

Q=95.4g\times 0.44J/g^oC\times (32-22)^oC

Q=419.76J

The value of Q is positive that means energy is absorbed.

Therefore, the amount of energy needed is, 419.76 J and the energy is absorbed.

ANSWERED AT 28/02/2020 - 02:51 PM


QUESTION POSTED AT 28/02/2020 - 02:51 PM

What is an example of where energy transfer by conduction is a curringNOW ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

If you're feeling cold and you cuddle someone you'd feel better because the heat is transferred from their body to yours

ANSWERED AT 28/02/2020 - 02:42 PM


QUESTION POSTED AT 28/02/2020 - 02:42 PM

What is process of bringing water to boiling affects

Boiling is the rapid vaporization of a liquid, which occurs when a liquid is heated to its boiling point, the temperature at which the vapour pressure of the liquid is equal to the pressure exerted on the liquid by the surrounding atmosphere. There are two main types of boiling; nucleate boiling where small bubbles of vapour form at discrete points, and critical heat flux boiling where the boiling surface is heated above a certain critical temperature and a film of vapor forms on the surface. Transition boiling is an intermediate, unstable form of boiling with elements of both types. The boiling point of water is 100 °C or 212 °F, but is lower with the decreased atmospheric pressure found at higher altitudes.

Boiling water is used as a method of making it potable by killing microbes that may be present. The sensitivity of different micro-organisms to heat varies, but if water is held at 70 °C (158 °F) for ten minutes, many organisms are killed, but some are more resistant to heat and require one minute at the boiling point of water. Clostridium spores can survive this treatment, but as the infection caused by this microbe is not water-borne, this is not a problem.

Boiling is also used in cooking. Foods suitable for boiling include vegetables, starchy foods such as rice, noodles and potatoes, eggs, meats, sauces, stocks and soups. As a cooking method it is simple and suitable for large scale cookery. Tough meats or poultry can be given a long, slow cooking and a nutritious stock is produced. Disadvantages include loss of water-soluble vitamins and minerals. Commercially prepared foodstuffs are sometimes packed in polythene sachets and sold as "boil-in-the-bag" products.


ANSWERED AT 28/02/2020 - 02:15 PM


QUESTION POSTED AT 28/02/2020 - 02:15 PM

How many electrons are needed to completely fill the second level energy? The third? The fourth?

The maximum number of electrons that an energy level can hold is determined from the formula 2n^2 equals the total number, where n is the energy level.  The first energy level holds 2*1^2=2 electrons while the second holds 2*2^2= 8 electrons.

ANSWERED AT 28/02/2020 - 02:04 PM


QUESTION POSTED AT 28/02/2020 - 02:04 PM

Earth has several ideal features which enable it to support life. MOST important is the A) gravitational force on Earth. B) existence of tectonic plates. C) relationship between Earth and its moon. D) existence and amount of water on Earth's surface.

Earth Has Several Ideal Features which enable it to support Life. (MOST) Important is the

Answer:D.) Existence and amount of water on Earth's Surface.

Explaining:All of the Answer's choices help Earth, in some way, to Support life.But Most important is the Existence and amount of the water on earth surface             
                                          Good Luck...... *-*



ANSWERED AT 28/02/2020 - 01:14 PM


QUESTION POSTED AT 28/02/2020 - 01:14 PM

5 ways weathering can occur

Rain, plant roots, tempeture, biological acivity 

ANSWERED AT 28/02/2020 - 01:05 PM


QUESTION POSTED AT 28/02/2020 - 01:05 PM

Lifting a ball increases its what energy

Gravity because when you drop the gravity from the earth forces the ball down...but when yuo add more as in lifting the ball higher it becomes the gravtiy becomes stronger

ANSWERED AT 28/02/2020 - 01:00 PM


QUESTION POSTED AT 28/02/2020 - 01:00 PM

A ______ is a machine that converts mechanical energy to electrical energy. A. transmitter B. pulverizer C. generator

C.generator is the answer

ANSWERED AT 28/02/2020 - 12:47 PM


QUESTION POSTED AT 28/02/2020 - 12:47 PM

The molar mass of water (H2O) is 18.0 g/mol. A sample of water has a mass of 18.0 g. How many moles of water are contained in this sample? a) 1.00 b) 18.0 c) 36.0 d) 324

Number of moles = Given Mass / Molar mass

Here, Given mass = 18 g
Molar mass = 18 g/mol

Substitute their values, 
n = 18/18
n = 1 mol

In short, Your Answer would be: Option A

Hope this helps!

ANSWERED AT 28/02/2020 - 12:46 PM


QUESTION POSTED AT 28/02/2020 - 12:46 PM

Describe what Darwin observed during his voyage on the HMS Beagle

I think he saw birds of striking different form and structure to those of Europe and went further to establish that it was due to evolution. 

ANSWERED AT 28/02/2020 - 12:33 PM


QUESTION POSTED AT 28/02/2020 - 12:33 PM

Which describes an alkaline solution? pH less than 7 pH equal to 7 basic acidic

Answer:

  • The correct answer is C.
  • Basic

Explanation:

  • The pH scale is 0-14. The values from 0-6 show acidic properties while at 7 pH, it act as neutral while from 8-14 shows basic properties.

pH less than 7

pH less than 7 describe the acidic solution

pH equal to 7

pH equal to 7 describe that solution is neither acidic nor basic. It is neutral

basic

Basic solution describe the alkaline solution, so it is correct one. The alkaline solution has same range as basic solution

acidic

Acids describe the acidic solution , not a alkaline solution

ANSWERED AT 28/02/2020 - 12:08 PM


QUESTION POSTED AT 28/02/2020 - 12:08 PM

How does phosphorous reach surface waters ?

It is an essential element for plant life, but when there is too much of it in water, itcan speed up eutrophication (a reduction in dissolved oxygen in water bodies caused by an increase of mineral and organic nutrients) of rivers and lakes. Soil erosion is a major contributor of phosphorus to streams.

Here is a website link for you if you don't understand. https://water.usgs.gov/edu/phosphorus.html
Here's a video if you're still having trouble http://study.com/academy/lesson/what-is-eutrophication-definition-causes-effects.html

ANSWERED AT 28/02/2020 - 12:06 PM


QUESTION POSTED AT 28/02/2020 - 12:06 PM

Which of the following is a chemical change? A. melting ice B. boiling water C. burning candle D. frost forming inside of a freezer

Answer to this question is c. burning candle. the rest of the choices are phase changes

ANSWERED AT 28/02/2020 - 11:44 AM


QUESTION POSTED AT 28/02/2020 - 11:44 AM