To balance, which of the following must be true?
A. the object has a simple shape
B. there is a low center of gravity
C. there are no forces acting on the object
D. the center of gravity is over the support

Answer:

564100J (~ 565000J) of heat energy is required.

Explanation:

The enthalpy of vaporization of water is 2256.4J/g, meaning that 2256.4J of heat is required to convert 1 gram of water at 100 degrees Celcius to steam at 100 degrees Celcius.

In your case, we have 250g of water at 100C and we want to vaporize it to steam (also at 100C).

This requires ΔH = 2256.4(250) = 564100J of heat energy.

Answer:

ummm b i am pretty sure that it is the answer

Answer:

I think it is a sorry if i'm wrong

Explanation:

Answer: Continental climates are classified by whether that fluctuates a lot. Hot summer, Cold winters and Little rainfall are all characteristics of Continental Climates

Explanation:

Answer:

Cleaning up oil spills and metal contaminates in a low-impact, sustainable and inexpensive manner remains a challenge for companies and governments globally.

But a group of researchers at UW–Madison is examining alternative materials that can be modified to absorb oil and chemicals. If further developed, the technology may offer a cheaper and “greener” method to absorb oil and heavy metals from water and other surfaces.

Aerogels, which are highly porous materials and the lightest solids in existence, are already used in a variety of applications, ranging from insulation and aerospace materials to thickening agents in paints. The aerogel prepared in Gong’s lab is made of cellulose nanofibrils (sustainable wood-based materials) and an environmentally friendly polymer. Furthermore, these cellulose-based aerogels are made using an environmentally friendly freeze-drying process without the use of organic solvents.

It’s the combination of this “greener"material and its high performance that got Gong’s attention.

“For this material, one unique property is that it has superior absorbing ability for organic solvents — up to nearly 100 times its own weight,” she says. “It also has strong absorbing ability for metal ions.”

Treating the cellulose-based aerogel with specific types of silane after it is made through the freeze-drying process is a key step that gives the aerogel its water-repelling and oil-absorbing properties.

Answer:

He provided a number of scientific insights that laid the foundation for future scientists. He also improved telescope that helped further the understanding of the world and universe.

Explanation:

Answer:it’s because Galileo Galilei is pretty much the father of today’s modern science

Explanation:

I hope this helps :)

Answer:

it would not be

Explanation:

because the moon doesn't always go into earth's shadow

Answer:

It's true that the moon goes around Earth every month, but it doesn't always get in Earth's shadow. The moon's path around Earth is tilted compared to Earth's orbit around the sun. The moon can be behind Earth but still get hit by light from the sun. ... This is why we don't get a lunar eclipse every month.

Explanation:

Answer:

Decreasing

Explanation:

A phase change is occuring; the liquid water is changing to gaseous water, or steam. On a molecular level, the intermolecular forces between the water molecules are decreasing. The heat is providing enough energy for the water molecules to overcome these attractive forces.

The statement that correctly describes the motion of the can is D. that the can move at a constant velocity.

In conclusion, the can move at a constant velocity

Read related link on:

https://brainly.com/question/23332275

Answer:

Air is a mixture of approximately 80% nitrogen, 20% oxygen and a small amount of many other gases.

Explanation:

Answer:

To calculate the force of impact F, first lets calculate the acceleration a of the ball:

a=v/t where v is the velocity of the ball and t is time

a=32/0.8=40 m/s²

To get the force F we need the Newtons second law:

F=m*a where m is the mass of the ball and a is the acceleration.

F=m*a= 0.2*40 = 8 N

So the impact force is F= 8 N.

Explanation:

Answer:

Friction in the wheels transforms kinetic energy into thermal energy.

Explanation:

Answer:

The first true or false Question, I believe to be true and the second one I think it is False

Explanation:

1. The Gulf of Mexico's water is very warm.

2.  It tropical meaning a wet so it couldn't form over Dry land.

     Hope this Helps :)

Answer:

Lightning rods (and the accompanying protection system) are designed to protect a house or building from a direct lightning strike and, in particular, a lightning-initiated fire, Static electricity is the result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged. One way to discharge them is through a circuit, and An electroscope is an early scientific instrument used to detect the presence of electric charge on a body. It detects charge by the movement of a test object due to the Coulomb electrostatic force on it.

Explanation:

Im smart

Answer:

6.It is concluded that while high temperature has an unfavourable effect on seed set of radish plants, it also weakens the incompatibility reaction between pollen and style, so that the result is a small increase in yield.

7.The result of the study showed that music with a higher intensity is more distracting and has a greater effect on task performance and concentration. The result helped formulate the Attention Drainage Effect theory, which is based on Kahneman's (1973) capacity model of attention

8. If the food is more colorful then the fish will eat more because they're more interested in the colors

9.If plants do not receive enough light, they will not grow at their maximum rate or reach their maximum potential, regardless of how much of any other variable – water, growth medium or fertiliser – they receive. Light is the driving force for photosynthesis, a plant process that changes sunlight into chemical energy. Plants need five things in order to grow: sunlight, proper temperature, moisture, air, and nutrients. These five things are provided by the natural or artificial environments where the plants live. If any of these elements are missing they can limit plant growth.

The independent (or manipulated) variable is something that the experimenter purposely changes or varies over the course of the investigation. The dependent (or responding) variable is the one that is observed and likely changes in response to the independent variable.

10.What effect does smiling have on a teacher giving no homework.  

Hypothesis

If a student smiles at teacher, then no homework will be assigned

independent variable is smiling

dependent variable is homework

Explanation:

Answer:

#1 If the temperature is increased then radish germination will increase.

Independent variable: temperature

Dependent variable: radish germination

#2 if students study with music then their test scores will increase

Independent variable: Music

Dependent variable: student test scores

#3 if fish food is red than fish will eat more

Independent variable: fish food color

Dependent variable: amount of food eaten

#4 if the amount of sunlight is increased then plants will grow larger

Independent variable: amount of sunlight

Dependent variable: Plant size

#5 if students smile more then the teacher will assign less homework

Independent variable: Students smiling

Dependent variable: Amount of homework

I'm sorry but this question has no more space but i hope i helped this took a long time to type out. :)

Answer:

sunlight

Explanation:

Answer:

A food chain consists of a series of organisms in which the first organism is ... It is very easy to trace almost anything you eat back to its original source of energy: the sun. ... An ecosystem can be as small and obscure as a blade of grass, a vernal

Explanation:

Answer:

[tex]cl3[/tex]

Explanation:

[tex]cl3 \: is \: an \: anion \: of \: chlorine \\ hope \: it \: helps \\ and \: pls \: mark \: as \: brainliest[/tex]

Compounds are formed by the combination of atoms of two or more different elements in a fixed ratio to each other. Therefore, Cl3 not a compound. Hence, option D is the correct answer.  

Matter can be divided into two categories.  Elements and compounds. An element contains particles of only one type which may be atoms or molecules. The compounds contain particles of two or more elements. Some main characteristics of compounds are,  

• Homogenous

• Definite melting and boiling points

• Combines in a fixed ratio

• Pure substance

Hence, we can conclude, compounds contain two or more different elements. Therefore, option D is the correct answer.

Learn more about compounds here:  

https://brainly.in/question/9930309

gold is the piece of metal which have larger mass.

Explanation:

because it is reactive in nature than copper

Answer: A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products

Explanation:

Answer:

Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products

Explanation:

Brainliest please?

Answer:Heat to Light

Explanation:

Answer: I’d say either heat to light or chemical to light, but im more confident with heat to light

Hope this helps, and I’m sorry if it doesn’t it’s been a while sense I’ve done this :)

Explanation:

Both the situations are examples of corrosion. The green colour seen in statue of Liberty is due to the copper oxide formation whereas the resulting in bike parts is due to the formation of iron oxide in the surface.

Corrosion is a chemical process by which the metals are destroying and change in colour. Metal surface when open to air or water will react with the oxygen forms corresponding oxides.

Corrosion is an electrochemical process where the oxygen acts as the anode and the metal surface cathode where the oxide deposits and the colour changes. Materials containing iron will react with oxygen forms a red iron oxide called rust which then completely corrode the metal.

Similarly, the statues are made of metal alloys containing copper. Copper also reacts with air or water forms the copper oxide which is green in colour that is why the statues are turning to a gree patchy colour over time.

To find more about corrosion, refer the link below:

https://brainly.com/question/489228

#SPJ2

Answer:

Q = 83500J

Explanation:

[tex]Q = L_{ice} *m[/tex]

[tex]L_{ice} = 3.34*10^{5} \frac{J}{kg}[/tex]

[tex]m = 250g = 0.25kg[/tex]

[tex]Q = (3.34*10^{5} \frac{J}{kg})*(0.25kg)[/tex]

[tex]Q = 83500J[/tex]

Answer:

space agency of the Republic of India, headquartered in Bengaluru. It operates under Department of Space (DoS) which is directly overseen by the prime minister of India while chairman of ISRO acts as executive of DoS as well. ISRO is the primary agency in India to perform tasks related to space based applications, space exploration and development of related technologies.[6] It is one of six government space agencies in the world which possess full launch capabilities, deploy cryogenic engines, launch extraterrestrial missions and operate large fleets of artificial satellites.[7][b]

The Indian National Committee for Space Research (INCOSPAR) was established by Jawaharlal Nehru[8] under the Department of Atomic Energy (DAE) in 1962, with the urging of scientist Vikram Sarabhai recognising the need in space research. INCOSPAR grew and became ISRO in 1969,[9] also under the DAE.[10][11] In 1972, the Government of India had set up a Space Commission and the Department of Space (DOS),[12] bringing ISRO under the DOS. The establishment of ISRO thus institutionalised space research activities in India.[13] It is managed by the DOS, which reports to the Prime Minister of India.[14]

ISRO built India's first satellite, Aryabhata, which was launched by the Soviet Union on 19 April 1975.[15] It was named after the mathematician Aryabhata. In 1980, Rohini became the first satellite to be placed in orbit by an Indian-made launch vehicle, SLV-3. ISRO subsequently developed two other rockets: the Polar Satellite Launch Vehicle (PSLV) for launching satellites into polar orbits and the Geosynchronous Satellite Launch Vehicle (GSLV) for placing satellites into geostationary orbits. These rockets have launched numerous communications satellites and Earth observation satellites. Satellite navigation systems like GAGAN and IRNSS have been deployed. In January 2014, ISRO used an indigenous cryogenic engine CE-7.5 in a GSLV-D5 launch of the GSAT-14.[16][17]

ISRO sent a lunar orbiter, Chandrayaan-1, on 22 October 2008, which discovered lunar water in the form of ice,[18] and the Mars Orbiter Mission, on 5 November 2013, which entered Mars orbit on 24 September 2014, making India the first nation to succeed on its maiden attempt to Mars, as well as the first space agency in Asia to reach Mars orbit.[19] On 18 June 2016, ISRO launched twenty satellites in a single vehicle,[20] and on 15 February 2017, ISRO launched one hundred and four satellites in a single rocket (PSLV-C37), a world record.[21][22] ISRO launched its heaviest rocket, Geosynchronous Satellite Launch Vehicle-Mark III (GSLV-Mk III), on 5 June 2017 and placed a communications satellite GSAT-19 in orbit. With this launch, ISRO became capable of launching 4-tonne heavy satellites into GTO. On 22 July 2019, ISRO launched its second lunar mission Chandrayaan-2 to study the lunar geology and the distribution of lunar water.

Future plans include development of the Unified Launch Vehicle, Small Satellite Launch Vehicle, development of a reusable launch vehicle, human spaceflight, a space station, interplanetary probes, and a solar spacecraft mission.

Explanation:

Answer:

A.

Explanation:

thnx for the brinliest

Answer:

A) geotropism

Explanation:

I hope this helps!

Please give me brainliest!

:}

Answer:

Im pretty sure its d

Explanation:

Im srry if its wrong but I hope this helped and have a great day!

Answer:

ITS C

Explanation:

Answer:

Yes/true/correct

Explanation:

I hope this helps! ^^

A 15

DONE.........................