Energy required : 4.23 x 10⁹ J
Further explanationHeat can be calculated using the formula:
Q = mc∆T
Q = heat, J
m = mass, g
c = specific heat, joules / g ° C
∆T = temperature difference, ° C / K
Volume of water:[tex]\tt V=L\times W\times H\\\\V=10\times 4\times 3=120~m^3[/tex]
mass of water :ρ = 1000 kg/m³
[tex]\tt mass=\rho\times V\\\\mass=1000~kg/m^3\times 120~m^3=120,000~kg[/tex]
Heat requiredc water = 4200 J/ kg ° C
[tex]\tt Q=m.c.\Delta T\\\\Q=1.2\times 10^5\times 4200\times (28.6-20.2)\\\\Q=42336\times 10^5=4.23\times 10^9~J[/tex]
A steel cylinder contains a glass jar of sodium metal surrounded by water. All together the cylinder and its contents weigh 1000g. The cylinder is dropped which breaks the glass and shortly after popping sound is heard. Since the steel container did not break, we can assume that... *
Answer:
A steel cylinder contains a glass jar of sodium metal surrounded by water. All together the cylinder and its contents weigh 1000g. The cylinder is dropped which breaks the glass and shortly after popping sound is heard. Since the steel container did not break, we can assume that... *
Explanation:
stays the same the mass and stuff dosnt change.
What phase of matter would the above substance be at 500⁰C?
Answer:
Is 4 an answer? If so, that is correct
Explanation:
PLEASE HELPPPPP I WULL MARK BRAINLEIST
Answer:
the answer is: 10
Explanation:
To find density you do mass divided by volume
We use the Scientific method to minimize human error in experiments.
OS
OO
True
False
Answer:
false false false false false
Characteristics used to describe matter are you called
Physical properties are characteristics that describe matter. They include characteristics such as size, shape, color, and mass. These characteristics can be observed or measured without changing the identity of the matter in question.
Answer:
Physical properties
Explanation:
What is the main type of energy in an iphone charging cable?
Answer:
replace its predecessor, the 30-pin dock connector, the Lightning connector is used to connect Apple mobile devices like iPhones, iPads, and iPods to host computers, external monitors, cameras, USB battery chargers, and other peripherals.
Fill in the blank. An answer would be great right now!!! I’m having trouble with science. thanks!!
Answer:
1. Richter 2. Moment
Hope this helps !!
Periodic trends
PLEASE HELP ME OUTT!! I WILL GIVE BRAINLIEST!
Answer:
A. Ba
C. Cu
D. H
Explanation:
HOPE THIS HELPS
Is the discharging of a battery producing electricity an Intramolecular force or Intermolecular force?
Answer:
I think its intermolecular
Explanation:
I'm sorry if it is wrong
Answer:
intermolecular forces
Explanation:
NEED HELP ASAP
Select all the correct answers.
Which of these are examples of mixing and separating?
removing seed casings from grains
a soda bottle bubbling when it is opened
a bright copper statue turning green from weathering
removing salt from seawater
water decomposing to oxygen and hydrogen
Answer:
the answer is
removing seed casings from grains
removing salt from seawater
Explanation:
This question is regarding mixing and separating such as a physical change.
a soda bottle bubbling is a chemical reaction
copper statue is a chemical reaction
water decomposing to oxygen and hydrogen is also a chemical reaction
this question is talking about mixing and seperating as a physical change
What is the energy of a 3.12 x 10^18 s-1 wave?
A. 4.75 x 10 ^42 J
B. 5.74 x 10^-7 J
C. 2.07 x 10 ^15 J
D. 8.6 x 10 ^ 4 J
Among electromagnetic waves, UV rays are most dangerous because exposure to these radiation cause serious problems in living organism. The energy of wave is 2.08×10⁻¹⁵J.
What is electromagnetic wave?
Electromagnetic wave is a wave which contain two component one is electric component and other is magnetic component. The electric and magnetic component are perpendicular to each other. There are so many wave that comes under electromagnetic wave like infrared wave , radio wave .There is a relation between energy of wave. frequency of wave
Mathematically,
E=hv
where,
E = energy of electromagnetic wave
h is planks constant having value 6.67×10⁻³⁴js
v= frequency of wave
substituting the given values
E= 6.67×10⁻³⁴js×3.12 x 10¹⁸ s⁻¹
E= 2.08×10⁻¹⁵J
Therefore the energy of wave is 2.08×10⁻¹⁵J.
To know more about electromagnetic wave, here:
https://brainly.com/question/12289372
#SPJ2
Pilots of hot air balloons are able to steer them somewhat by moving them up or down to enter different air currents that move in different directions. Explain how the flame can be used to do that.
Answer:
To understand this first we must understand what is happening at the molecular level. When we heat any substance it changes its state of matter because its molecules get excited. For example, when we heat water it turns into gas so the molecules get excited. The hot air balloon will move faster if we add heat because the gas molecules will get excited and push against the balloon, making it faster. If we start removing heat, the balloon's acceleration will slow down because the molecules will get less excited.
Hot air balloons flies by means of it being lighter than air
The flame can be used to move the pilot to different directions by increasing the temperature of the air in the balloon and therefore, the volume, therefore, decreasing the density of the air which changes the elevation of the balloon to the appropriate elevation having winds moving in the desired direction
The principle by which the above process works is as follows:
According to Charles law, the volume of a mass of gas is directly proportional to its Kelvin temperature
V ∝ T
[tex]\dfrac{V_1}{T_1} = \dfrac{V_2}{T_2}[/tex]
[tex]V_2 = T_2 \times \dfrac{V_1}{T_1}[/tex]
[tex]Density, \rho = \dfrac{Mass, \ m}{Volume, \ V}[/tex]
Therefore, as the temperature is increased, the volume occupied the mass gas increases, and therefore, the density decreases
The principle on which the hot air balloon operates on is the principle that hot air is less dense than and therefore, rises above cool air
Therefore, the pilot of an hot air balloon heats up the air in the balloon to allow the balloon to rise and the pilot switches off the burner so that the air in the balloon cools and the balloon looses altitude
The mechanism of the hot air balloon does not have a steering, and therefore, the wind direction is used to steer the balloon
The direction of the wind is different at different altitude, such that by obtaining the direction of the wind at a given altitude, the pilot can raise or lower the balloon up or down to the altitude having the desired wind direction, by increasing the temperature of the air in the balloon by switching on the burner to go to a higher altitude, or by switching off the burner so the air in the balloon cools and the balloon loses some of its altitude to reach the wind going in the direction of the pilot
Learn more about hot air balloon here:
https://brainly.com/question/21890581
what is the volume when the density is 7.83g/ml and 19.6 grams?
Check all of the pure substances
below
Water
Oxygen
Salt Water
Solid gold ring
Mud (dirt and water)
Shampoo
The electron configuration for aluminum (Al) is shown below:
1s22s22p63s23p1
Which diagram shows the correct distribution of electrons in the electron shells of an aluminum atom?
A small orange dot is surrounded by 5 concentric circles. The inner ring has green dots at the north and south positions. The second ring has green dots at east and west. The third ring has six dots, at the north, northeast, southeast, south, southwest, and northwest. The fourth ring has dots at the north and south, and the outer ring has one dot at the west position.
A small orange dot is surrounded by two concentric circles. The inner circle has 6 green dots spaced approximately evenly across the circle. The outer circle has 7 dots, also approximately evenly spaced; none are aligned with dots in the inner circle.
An orange dot has 3 concentric circles surrounding it. The innermost circle has green dots at the north and south positions. The center circle has 8 dots spaced unevenly. The outer circle has three dots, spaced so that two are closer to each other than either is to the third.
An orange dot is surrounded by a concentric circle. 13 closely spaced green dots lie on that outer circle.
Answer:
It is the third choice
Explanation:
Just did assignment
Answer:
It's C
Explanation:
What is the chemical name for Se2CI
Answer: caesium oxide
Explanation:I think sorry if I’m wrong
Which element below has atoms with only two valence electrons?
Potassium
Sulfur
Magnesium
Neon
7. Compared with our'Sun, the star Belelgeuse is
smaller, hotter, and less luminous
smaller, cooler, and more luminous
larger, hotter, and less lumulous
larger, cooler, and more luminous
Answer:
Larger, cooler, and more luminous.
Betelgeuse is red in color, and that means that the surface of it is cooler than the sun (bluish white is hottest, and red is lowest). It is also common knowledge that it is larger, so the correct option would be D. Hope this helped :)
What is a possible reason that ecosystem 2 has fewer species than ecosystem 1?
it doesn't repopulate as fast because ecosystem 2 could have more trouble reproducing then ecosystem 1.
Which term names the longest geologic time frame?
Answer:
Precambrian
Explanation:
Answer:
An Eon
Explanation:
epcohs are the shortest geologic time frame, which make up periods, that make up eras, that make up eons.
Lisa's Chemistry class was performing an experiment with gas pressures. They filled a container with gas at a pressure of 101,000 Pa at room temperature. When they doubled the temperature, the pressure also doubled. What was the new pressure in scientific notation?
Answer:
2.02 × 10^5 Pa
Explanation:
According to this question, in an experiment, a container was filled with gas at pressure of 101,000 Pa, at room temperature. When this temperature was doubled, the pressure also increased by two times i.e.
The pressure changed to (101,000 Pa × 2) = 202,000 Pa
This question is asking to represent this in scientific notation. Scientific notation aims at representing a small or too large number in an easy way. It is done by making use of power of ten i.e. a × 10^b
Where; a = decimal number
b = power of ten
In the case of a large number like 202,000, the power of ten is derived by counting the decimal place backwards. If we are to count until we stop in front of the last digit, we will have 5 times.
That is; 2.02000 × 10^5
We can remove every trailing zeros
Hence, the answer is 2.02 × 10^5 Pa.
what is the process called when the moon begins to fade from a full moon to a new moon
Answer:
It's called moon phase
Explanation:
hope this helps
If measurements are made, then they are more precise on a larger scale.?
Answer:
No.
Explanation:
According to the formula б/X=б/√n, as more measurements are made, the uncertainty gets smaller.
24 Points!! 12 Points Each Please Help ASAP!! View Attached Image!! Will Mark Brainliest If All Are Answered!!
Answer:
14. C , 15. C. 16. B , 17. D They are all right
Explanation:
Which of the following describes an irregular galaxy?
A.) A round football shaped disk
B.) A disk with spiraling arms around it
C.) An oval disk
D.) A random group of stars and no shape
Answer:
D
Explanation:
They don't have define shape nor structure...so a random group of stars and no shape can form a irregular galaxy
what is the mass number? plz help!
Answer:
I believe it is 2?
Explanation:
;v;
A chemist prepares a solution of sodium carbonate by measuring out of sodium carbonate into a volumetric flask and filling the flask to the mark with water. Calculate the concentration in of the chemist's sodium carbonate solution. Be sure your answer has the correct number of significant digits.
Answer:
The correct answer will be "[tex]9.45\times 10^{-5} \ mol/L[/tex]".
Explanation:
We have:
Moles of solute (Na₂Co₃) = [tex]18.9 \mu \ mol[/tex]
= [tex]18.9\times 10^{-6}[/tex]
[tex]1 \mu \ mol[/tex] = [tex]10^{-6} \ mol[/tex]
Now,
The volume of the solution will be:
⇒ [tex]0.200 \ L[/tex]
∴ [tex]{1 \ mL=0.001 \ L}[/tex]
The formula to find the concentration will be:
⇒ [tex]Concentration = \frac{moles \ of \ solute \ (mol)}{Volume \ of \ solution \ (L)}[/tex]
On substituting the given values, we get
⇒ [tex]=\frac{18.9\times 10^{-6}}{0.200}[/tex]
⇒ [tex]=9.45\times 10^{-5} \ mol/L[/tex]
(50 POINTS) Why does the radius of an atom increase as you go down a group on the periodic table?
A) because you are increasing the size of the electrons, which takes up more space
B) because you are adding another outer level of electrons, further from the nucleus
C) because you are adding more neutrons, which reduces the attraction between proton and electron
D) because you are decreasing the pull by the nucleus, allowing the electrons to travel further away
Answer:
B
Explanation:
The atomic radius increases as you go down a group in the periodic table. Atoms get larger because more electrons are being added in higher energy levels, and each energy level is further from the nucleus than the last. Therefore, the atomic radius increases as you go down a group.
Summarize the meaning of the term activation energy.
Answer:
Activation energy, in chemistry, the minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport.
Explanation:
explain what you think what happen to rubber if too manyn cross limks are formed.
Answer:
The rubber becomes brittle and can break in your hand. The explanation for why this happens concerns cross-linking bonds. Ultra-violet light from the sun provides the polymer molecules with the activation energy they need to be able to form more cross-links with other chains.
