Answer:
410.196 J/[kg*°C].
Explanation:
1) the equation of the energy is: E=c*m*(t₂-t₁), where E - energy (523 J), c - unknown specific heat of copper, m - mass of this copper [kg], t₂ - the final temperature, t₁ - initial temerature;
2) the specific heat of copper is:
[tex]c=\frac{E}{m*(t_2-t_1)}; \ => \ c=\frac{523}{0.085*(45-30)}=\frac{523}{1.275}=410.196[\frac{J}{kg*C}].[/tex]
Which description is an example of the effects of rising temperatures?
Can someone help with this pls!!
Answer:
2
Explanation:
good vibes
Can someone give me Two methods for monitoring and minimizing a human impact on the environment?
The force on an object is given by the equation F= ma. In this equation, Fis
the force, mis the mass, and a is the acceleration. What is the force on an
object that has a mass of 540 kg and an acceleration of 2.3 m/s2?
Answer:
[tex]\boxed {\boxed {\sf 1, 242 \ N}}[/tex]
Explanation:
According to Newton's Second Law of Motion, force is the product of mass and acceleration.
[tex]F=ma[/tex]
In this formula, F is the force, m is the mass, and a is the acceleration.
The mass of the object is 540 kilograms and the acceleration is 2.3 meters per second squared.
m= 540 kg a= 2.3 m/s²Substitute the values into the formula.
[tex]F=(540 \ kg)(2.3 \ m/s^2)[/tex]
Multiply.
[tex]F=1242 \ kg*m/s^2[/tex]
Conver the units. 1 kilogram meter per second squared is equal to 1 Newton. Therefore, our answer of 1242 kilogram meters per second square is equal to 1242 Newtons.
[tex]F= 1242 \ N[/tex]
The force of the object is 1242 Newtons.
An object experiences a net force to the right that gives it an acceleration of 2.0 m/s2. If the net force is doubled then the new acceleration of the object will be ???
Answer:
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
How does the concentration of ions in a strong acid differ from a weak acid?
Answer:
A strong base has a much smaller concentration of positive ions (hydrogen ions) and a much greater concentration of negative ions (hydroxide ions). The weak base has a much greater concentration of positive ions (hydrogen ions) and a much smaller concentration of negative ions ( hydroxide ions) = answer !!
Explanation:
What is the pH of a solution if [H+] = 1.0 x 10-5M? *
1 point
5.00
7.00
11.00
50.0
Answer:
5.00
Explanation:
because ignoring the pH solution part and doing the math it comes around to 1.0x5.0 which 1 times anything is itself so its 5
1. Write down two ways in which a mountain can be worn away.
Answer:
Gale force winds, lightning strikes, temperature extremes and a deluge of snow, hail or rain. These combined forces break up the rocks and erode the peaks into their stark, sculpted forms.
Explanation:
An atom's Lewis dot structure has three dots. Which of the following elements could it be, and why? (4 points)
Group of answer choices
Aluminum, because it is in group 13 and has three valence electrons.
Lithium, because it is a group 1 element with three total electrons.
Magnesium, because it is in period 3 and has three valence electrons.
Potassium, because it is an alkali metal and has three inner shell electrons.
Answer : The correct option is, Magnesium because it is a group 2 element with two valence electrons.
Explanation :
Element = Calcium
Atomic number = 20
Electronic configuration of Ca =
Number of valence electrons in Ca = 2
The number of inner shell electrons in Ca = 18
This option is wrong because lewis-dot structure shows only valence electrons not inner shell electrons.
Element = Carbon
Atomic number = 6
Electronic configuration of C =
Number of valence electrons in C = 4
This option is wrong because only outermost p-sublevel electrons are not showing in lewis-dot structure.
Element = Lithium
Atomic number = 3
Electronic configuration of Li =
Number of valence electrons in Li = 1
This option is wrong because it has only 1 electron in outermost shell.
Element = Magnesium
Atomic number = 12
Electronic configuration of Ma =
Number of valence electrons in Ma = 3
This option is correct.
Lewis-dot structure : It is defined as the structure in which valence electrons of the atom is shown as dots.
ANOTHER EXPLANATION:
Answer: C. Magnesium, because it is a group 2 element with two valence electrons.
An atom's Lewis dot structure has two dots. Which of the following elements could it be, and why?
A. Calcium, because it is an alkaline earth metal with two inner shell electrons.
B. Carbon, because it has two electrons in its outermost p sublevel.
C. Lithium, because it is a group 1 element with two bonding electrons.
D. Magnesium, because it is a group 2 element with two valence electrons.
Explanation:
If you were to look at the periodic table magnesium would be in group 2. Since magnesium is in group 2 therefore it will have two valence electrons. Calcium is another possible answer because it is also in group two, but for this quiz it is incorrect. Lithium is incorrect because it is in group 1 and therefore it would only have 1 valence electron. Carbon is also incorrect because it is in group 14 so it would have 4 valence electrons. Hope this helps and makes sense.
Good Luck!!
Have a great day Studying!
The Lewis dot structure of an atom has three dots. With three valence electrons and belonging to group 13, which of the following elements may it be?
Are the elements of group 13 metals?The semi-metal boron (B) and the metals aluminum (Al), gallium (Ga), indium (In), and thallium (In) are all members of the boron family (Tl). The periodic table's fifth element, boron (Z=5), is found in Group 13. It is categorized as a metalloid because of its characteristics, which combine those of metals and nonmetals.
What traits does group 13 exhibit?The Periodic Table of Elements places these elements in Group 13 (XIII) of the p block. Metallic elements include thallium, gallium, indium, and aluminum. In their outermost shells, they each have three electrons shell with the valence electron configuration ns2np1 (one electron in the p orbital and a complete s orbital).
To know more about Lewis structure, visit-https://brainly.com/question/4144781
#SPJ2
.
MARKING BRAINLIEST :)
Which property has a trend similar to that of electronegativity?
A. First ionization energy
B. Atomic radius
C. Ionic radius
D. Atomic mass
Answer:
a
Explanation:
There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, the correct option is option A.
What is periodic table?Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.
Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.
Along period, electronegativity increases. along group electronegativity decreases. The same trend is followed by first ionization energy in periodic table.
Therefore, the correct option is option A.
Learn more about periodic table, here:
https://brainly.com/question/11155928
#SPJ2
need help w this question
Answer:
ok you got it you just need to add.
Explanation:
add 5 times and she what you get.
Plz help ASAP
Dgdhhd
Answer:
Same As.
Explanation:
Mass will not increase or decrease because matter is not created or destroyed. The Law of Conservation of Mass states that the mass of a system must remain constant throughout. Energy is conserved.
In the formation of an ionic compound a metal atom is most likely to __________ valence electrons
Answer:
To lose valence electrons.
Explanation:
Explain why sodium loses one electron and chlorine gains one electron in three or more sentences.
Answer:
Sodium and chloride form an ionic bond. Therefore the sodium atom loses one electron from its outer shell and the chlorine atom gains one electron. As this happens, the electron is transferred from the sodium atom to the chloride atom and so both atoms become ionic and have a full outer shell.
Why does the atomic radius increase from top to bottom?
go to Russia and ask them. they know a lot about nukes
Heavy rains fill a reservoir, causing the dam that holds the water to break. As a result, the areas downstream are suddenly flooded. Which question would a
scientist seek to answer?
A. What will be the long-term effect of the flood on the plants and
animals in the area?
B. Who was responsible for the design flaw in the dam?
C. What changes in regulations are needed to prevent future dam
failures?
D. How much money should be spent to ensure dam safety?
. A car accelerates at a constant rate in a straight line.
The velocity of the car increases from 4.9 m/s to 6.4 m/s in 3.00 minutes.
Calculate the acceleration of the car.
Give your answer to 3 significant figures.
Answer:
The acceleration of the car is 0.0273.
Explanation:
We can find this by using the acceleration formula which is:
a = ( vf - vi ) / Δt
a is acceleration.
vi is the initial velocity.
vf is the final velocity.
When we substitute into the equation we get. . .
a = ( 6.4 - 4.9 ) / 3
and when we solve this equation we get 0.02734
Hope this helps. . . <3
please helllllllllllllllllllllllllllllllp
So what you dos is the final temperature - the initial temperature. For example for 1) we have 88.5 celsius degrees - 78 celsius degrees = 10.5 celsius degrees.
Which of the following is the equation for wave speed?
Answer:
[tex]{ \boxed{ \mathfrak{ \: answer : \: { \bf{v = f \lambda}} }}}[/tex]
v is the wave speedf is frequencylambda is wave lengththe maximum internal receiving temperature for fresh poultry is:
It should be noted that the maximum internal receiving temperature for fresh poultry is 41°F.
Temperature simply refers to the measure of hotness or coldness which is expressed in several scales. It's the manifestation of thermal energy in a matter.
It should be noted that the key to limiting the bacterial growth of food is to control the temperature. The maximum acceptable receiving temperature for fresh poultry is 5°C (41°F).
Read related link on:
https://brainly.com/question/25679814
Hand warmers and instant cold packs use _____ that release or absorb thermal energy.
Answer:
Hand warmers and instant cold packs use Endothermic that release or absorb thermal energy.Hand warmers and instant cold packs use endothermic reaction that release or absorb thermal energy.
What is thermal energy?Thermal energy is defined as by virtue of its temperature, a system in a condition of thermodynamic equilibrium contains internal energy. Fossil fuels like natural gas, coal, and oil are examples of thermal energy sources. They also include solar heat, electric heat pumps, and geothermal heat. Thermal energy is a type of kinetic energy, which is energy brought on by motion, and is brought on by the motion of particles. Things have an interior temperature as a result of thermal energy, which can be detected with a thermometer.
Endothermic reaction is defined as the chemical processes that result in the formation of products when the reactants absorb heat energy from their surroundings. A chemical reaction or physical change is referred to as being endothermic when heat is absorbed by the system from the environment. An endothermic process causes the system to absorb heat from its surroundings, which causes the surroundings' temperature to drop.
Thus, hand warmers and instant cold packs use endothermic reaction that release or absorb thermal energy.
To learn more about thermal energy, refer to the link below:
https://brainly.com/question/11278589
#SPJ2
Explain how living
on the moon would be similar
to going camping.
Answer:
you will die because no air
Which of the following actions will not increase the rate at which a solid dissolves in
a liquid?
using smaller particles of the solid
O lowering the temperature of the system
O increasing the surface area of the solid
stirring the solid and the liquid
Answer:
O lowering the temperature of the system
24.) In humans animals and plants the DNA is found in the?
Answer:
chromosome
Explanation:
Answer:
Most of the DNA in all animals, humans, and plants is found in the cell nucleus. Humans, animals and plants contains both DNA and RNA in the cell nucleus and they have to be present in all because every organisms structure and function directly depends upon them.
Explanation:
In a compound, chemical energy is _______________ when bonds break.
a
absorbed
b
released
c
both A and B
d
neither A or B
A sturdy plant is placed in an airtight, transparent container. The entire experiment is then weighed. For 10 days, the plant grows inside the container. After 10 days, the container is weighed again. The air inside the container is pumped out and carefully analyzed.
What is true about the air inside the container and the mass of the experiment?
-The air is richer in carbon dioxide. The mass of the experiment has not changed
-The air is richer in oxygen. The mass of the experiment has changed.
-The air is richer in carbon dioxide. The mass of the experiment has changed.
-The air is richer in oxygen. The mass of the experiment has not changed.
Answer:
hi
Explanation:
bye
ain the energy transformation that occurs when a hair dryer is plugged in and turned on.
Group of answer choices
Chemical energy transforms into electrical and sound energy.
Electrical energy transforms into mechanical and thermal energy.
Mechanical energy transforms into chemical and electrical energy.
Thermal energy transforms into electrical and gravitational energy.
Answer:
Mechanical
Explanation:
Since, this mechanical energy gets converted into thermal energy due to which hairs get dry. Thus, we can conclude that the energy transformation that occurs when a hair dryer is plugged in and turned on is that electrical energy transforms into mechanical and thermal energy.
The density of butter is 0.86 g/cm3. what is the mass of 240 cm3 of butter?
Answer:
mass= 206.4 g
Explanation:
Density= mass/volume
0.86=x/240
x=240×0.86
=206.4g
The density of butter is 0.86 g/cm³. 206.4g is the mass of 240 cm³ of butter. The phrase "specific volume" is occasionally used in thermodynamics to refer to a substance's reciprocal of its density.
Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth’s density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in metre-kilogram-second or SI units). For example, the density of air is 1.2 kilograms per cubic metre.
Density= mass/volume
0.86=x/240
x=240×0.86
=206.4g
To know more about density, here:
https://brainly.com/question/29775886
#SPJ6
What is considered a pure substance?
Answer:
A substance that has a fixed chemical composition throughout is called a pure substance such as water, air, and nitrogen. A pure substance does not have to be of a single element or compound.
Explanation:
Compound: A substance that contains more than one element
pure substance: is made up of one substance made up of only one type of molecule
What do all the molecules in the table have in common?
Answer:
They all consist of the same amount of protons, electrons, and neutrons in an element.
Explanation:
For example in water (H20) contains 1 atom of protons, 1 atom of electrons and 1 atom of neutrons.
