Answer:
Ans. C. physical change
Explanation:
Physical: boiling and melting are physical changes. When water boils no bonds are broken or formed
Boiling point refers to the temperature at which the pressure of the liquid (that is being boiled) becomes equal to its surrounding pressure which causes it to change to vapor.
Physical change refers to the changes that occur when the material that is changed is structurally similar both before and after the change.Chemical change occurs when the material is transformed into a different chemical substance.Physical property of a substance refers to those properties of a substance that are measurable and describes the state of a physical system.Chemical property refers to the property of a substance that is observed in a chemical reaction.The increase in pressure with boiling point is an example of the physical property as it shows the physical state of the system.
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What is the mass number of lithium isotope that consists of 3 protons, 4 neutron and 3 electrons
Answer:
7. ok
please mark me brainlistb
When you get home, you smell cookies baking. You respond by walking toward the kitchen. Many signals move through your
nervous system in this process. Which component is involved first? (1 point)
O axons in your motor neurons
axons in your sensory neurons
Odendrites in your motor neurons
O dendrites in your sensory neurons
Answer:
dendrites in your sensory neurons
Explanation:
Sensory neurons are first activated, then the stimulus is transmitted horizontally between them, spreading perception through the olfactory bulb that captures the smell of a baked cookie.
After this, the axons are activated to transmit to the motor neurons that will carry out the action of walking towards the kitchen.
11. Group 2 on the periodic table corresponds to what family of elements?
Answer:
Alkaline earth metals
Explanation:
When thermal energy is added to an object, what happens to the motion of the particles?
What is 316 Kelvin in Celsius ?
Answer:
42.85 Celsius
Convert 145 m/s to km/hour. using dimensional analysis.
Answer:
522 Kilometers per Hour
Explanation:
Hi there! :)
Answer:
[tex]\huge\boxed{522 km/hour}[/tex]
[tex]\text{Express 145 m/s as a fraction:} \frac{145m}{s}[/tex]
[tex]\text}Convert to km/hour by multiplying by the equivalents in terms of meters and seconds to cancel out the units}[/tex]
[tex]\frac{145m}{sec} * \frac{3600 sec}{1 hour} * \frac{1 km}{1000 m} = \\\\\text {Cross out similar units and multiply the coefficients:}\\\\\frac{145 * 3600 * 1km}{1 * 1hour * 1000} = \frac{522000km}{1000hour}= 522 km/s.[/tex]
Help with these 2 answers!
Answer:
go to google
Explanation:it all wayys works
Most elements' names end in the suffix -ium. This practice started around the year 1800, with many elements discovered before that having a more common name. However, some elements are more recently discovered and don't end in -ium. Do you notice any patterns for these elements?
Answer:
The last naturally occurring element to be discovered was francium (87) in 1939. Since that discovery, plutonium (94), neptunium (93) and astatine (85), which were initially created in the lab in 1940, have since been found in nature.
Explanation:
The -ium suffix is just a Latin suffix that creates abstract nouns, therefore, it's being used to construct scientific component names from their nomenclature origin, including such minerals (calcium from calx) or person names (gadolinium), and further discussion can be defined as follows:
This denotes a metallic element including platinum or barium. It's a group that forms positively charged ions: ammonia chloride, hydronium ion. It indicates a cellular structure, syncytium Etymology, New Latin, via Latin, via Greek -ion, small suffix.Its last found natural element found is francium (87) in 1939. Ever since, plutonium (94), neptunium (93), and astatine (85), which were synthesized inside the lab in 1940, have indeed been discovered throughout nature.Learn more:
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I have a 100 g block of iron with a density of 7.874 g/cm3. How much bare
cylindrical wire can be made from this block of iron with a diameter of 1 cm
(assuming no losses in the extruding process) ? Show your work for full credit.
Answer:
1,270 cm
Explanation:
100 g (cm^3/7.874 g)(m/cm^3)(100cm/m)
= 1270 cm
What is the chemical symbol of an element
A chemical symbol is a shorthand method of representing an element. Instead of writing out the name of an element, we represent an element name with one or two letters. As you know, the periodic table is a chemist's easy reference guide. ... Each element is represented by a chemical symbol consisting of letters
Solubility of CO2 in g/100 g water
Solubility of Oz in g/100 g water
Temperature in °C
Independent Variable
Dependent Variable
pls helppp asap
Answer:
Temperature - Independent variable
The solubility of CO2 and Solubility of O2 - Dependent variable
Explanation:
There are always two variables in an experiment: Independent and dependent variables.
Independent variables are defined as the variables that can be controlled or changed to measure its effect on the dependent variable and the dependent variable is influenced by the change in Independent variables.
In the given example, the temperature is the Independent variable and the solubility of CO2 and Solubility of O2 is the dependent variable because the solubility of CO2 and O2 decreases as temperature increases.
Hence, the correct answer is:
Temperature - Independent variable
The solubility of CO2 and Solubility of O2 - Dependent variable
An atom has a mass number of 9 and 5 neutrons. What is its atomic number?
O A. 19
B. 14
C. 11
D. 4
Answer:
D.4
Explanation:
Number of neutron= mass number - atomic number
where; d no of neutron is 5
d mass no is 9
atomic number be x
5=9-x
x=9-5
x=4
Answer: B 4
Explanation:approved
What are the two laws of conservation of energy?
Answer:
Explanation:
The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside. This is particularly confusing in the case of non-conservative forces, where energy is converted from mechanical energy into thermal energy, but the overall energy does remain the same. The only way to use energy is to transform energy from one form to another.
Answer:
The first law, also known as Law of Conservation of Energy, states that energy cannot be created or destroyed in an isolated system. The second law of thermodynamics states that the entropy of any isolated system always increases.
Explanation:
How are P waves and S waves used to find out how far away an earthquake is
Answer:
The distance between the beginning of the first P wave and the first S wave tells you how many seconds the waves are apart.
Explanation:
This number will be used to tell you how far your seismograph is from the epicenter of the earthquake.
Answer:
The distance between the beginning of the first P wave and the first S wave tells you how many seconds the waves are apart.
Explanation:
This number will be used to tell you how far your seismograph (an instrument that measures and records details of earthquakes, such as force and duration) is from the epicenter (the point on the earth's surface vertically above the focus of an earthquake) of the earthquake. Measure the distance between the first P wave and the first S wave.
The space shuttle heats up during reentry. Which term best describes what is causing
this?
O friction
O gravity
O acceleration
o velocity
How many significant figures does 0.00130 have
Answer:
3 significant figures
Explanation:
Zeros that come before any non-zero digits are never significant.Zeros that are in between any non-zero digits are always significant.Zeros that come after any non-zero digit are ONLY significant if a decimal point is present somewhere in the number. (In this case there is a decimal point.)I underlined the significant figures in this number:
0 . 0 0 1 3 0
pls help its due in a few minutes
Answer:
Theory
Explanation:
What characteristics of polyethylene glycol (PEG) make it an excellent substance for the liquid inside the paintballs?
why does the reactivity of elements increase going down Group 1 from lithium to rubidium but decreases going down Group 7 from fluorine to iodine?
Answer: The reactivity of group 7 elements decreases down the group because, as you go down the group: The atoms get larger. The outer shell gets further from the nucleus. The attraction between the nucleus and electrons gets weaker, so an electron is less easily gained.
Explanation:
Is chalk impermeable or permeable?
Answer:
Permeable.
Explanation:
Most sediments of a chalky quality are permeable.
PLEASE HELP DUE SOON!!
View the model and answer the question below.
In 1-2 complete sentences, identify the black lines and explain what they represent
Answer: They are magnetic lines and these lines depict the invisible magnetic field around the magnet! Hope this helps I got it right on my quiz :)
Explanation:
The form of energy stored in the bonds between atoms is _____________energy. This form of energy falls into the _____________energy category.
Answer:
1. chemical 2. potential
Explanation:
energy, potential energy, is stored in the covalent bonds holding atoms together in the form of molecules. This is often called chemical energy.Energy is found in different forms, but all energy falls into the following two categories – potential energy and kinetic energy. Potential energy is stored energy, or the energy of position. It consists of the following forms: Chemical energy is energy stored in the bonds between atoms in molecules.
The form of energy stored in the bonds between atoms is chemical energy. This form of energy falls into the potential energy category.
What is chemical energy ?The term chemical energy is defined as the energy of chemical substances that is released when they are undergo the process of chemical reaction and covert into the another substances.
The chemical energy is used to create heat and electricity along the world. Some peoples also burn these fuels on more minor scales to formed heat to keep buildings warm. They burn fossil fuels like natural gas, oil, and petroleum to produce steam to turn turbines that formed heat and electricity.
The energy stored in chemical bonds is called as chemical energy therefore, it is a form of potential energy. The examples of potential energy are the energy of water present behind a dam.
Thus, The form of energy stored in the bonds between atoms is chemical energy. This form of energy falls into the potential energy category.
To learn more about chemical energy, follow the link;
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Describe two ways the material in this lesson illustrates the importance of creativity in scientific investigation
Answer:
Dalton used creativity to modify Proust's experiment and interpret the results. Millikan used creativity to develop a way to measure the charge on an electron. Thomson used creativity to interpret the results of the cathode ray tube experiment.
Explanation:
Creativity enables scientists to devise new ways of solving old problems.
I do not know what your material contains, however, creativity is key in scientific investigation. The term "science" is coined from the Latin word "scientia" which means knowledge.
In science, we endeavor to create new knowledge through research and innovation. This requires that a scientist must think of new and efficient ways of solving old problems. This underscores the centrality of creativity in scientific investigation.
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Which statements accurately describe volume? Check all that apply.
An object with a mass of 8.2 g raises the level of water in a graduated cylinder from 25.1 mL to 28.3 mL. What is the density of the object? g/mL
Answer:
The density is 2.5625g/mL. Hope this helped! :)
Explanation:
M= 8.2g D=M/V
V= 28.3-25.1=3.2mL
D=8.2g/3.2mL
D= 2.5625g/mL
Write 750,000 in scientific notation
Answer:
Explanation:
scientific notation of 750000 is
7.5*10^5
High-frequency sound waves have a shorter_____ and a higher ______ than low frequency sound waves.
Answer:
High-frequency sound waves have a shorter wavelength and a higher amplitude than low frequency sound waves.
I need help bad
Please I need helppoo
help me ill give 39 points and please help
Answer:
sunlight is independent/hours is dependent
on the y axis it's hours/x axis is sunlight
can someone plss help me asap !!
which metal has a soluble carbonate, chloride and sulfate ?
a. copper
b. potassium
c. zinc
d. barium
Answer:
The answer is:
which metal has a soluble carbonate, chloride and sulfate?
A. Copper
B. Potassium
C. Zinc
D. Barium
The right answer is;
B_ Potassium
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