Answer: true
Explanation: For about 2000 years, people accepted Aristotle's idea that all matter is made up of just four elements: earth, air, water, and fire. Starting about 500 years ago, scientists began discovering all of the elements that are known today
What is the destiny of an object that has a mass of 20 grams and a volume of 10 millimeters
Answer:
2gcm⁻³
Explanation:
Given parameters:
Mass of the object = 20g
Volume = 10mL
Unknown:
Density of the object = ?
Solution:
Density of a body is its mass per unit volume;
Density = [tex]\frac{mass}{volume}[/tex]
We need to convert mL to cm³ for the volume
1mL = 1cm³;
10mL is therefore, 10cm³
So;
Density = [tex]\frac{20}{10}[/tex] = 2gcm⁻³
What kind of boundary is this boundary is the site of recurring earthquake activity and faulting.
Answer:
Transform boundary
Explanation:
The boundary that is a site of recurring earthquake and faulting activities is the transform boundary.
At a transform boundary, there is a significantly high prevalence of earthquakes and faulting.
In this margin, plates slides past one another laterally along a strike - slip direction. This brings about significant shearing and crushing of rocks. It leads to series of earthquakes and faults One notable example is the San Andreas fault100 POINTS AND BRAINLIEST
Answer:
please brainliest
Explanation:
the equation formula answer is [tex]x^{2} fxb\sqrt{3[/tex]
Answer:
the equation formula answer is x2 fxb[tex]\sqrt{3}[/tex]
someone help please i cant figure this out
Answer: 2 : 1
Explanation:
Cation :
Ca - calcium = atomic number = 20
Electron dot configuration : 2, 8, 8, 2
Ca losses 2 electrons in its outermost shell and thus has a charge of 2+ in other to attain a stable octet state.
Anion:
F - has 7 valence electrons and thus needs 1 electron to achieve a stable octet state, hence it accepts one electron has has a charge of (-1)
Therefore,
Ratio of cation (+) to negative (-) = 2 :1
How many pairs of electrons are shared in a single bond?
A. 1
B. 2
C. 3
D. 4
Answer:
A
Explanation:
Answer:
1
Explanation:
A.) A single bond shares 1 pair of electrons between 2 atoms.
B.) A double bond shares 2 pairs of electrons between 2 atoms.
C.) A triple bond shares 3 pairs of electrons between 2 atoms.
empirical formula
can i have help
Answer:
what kind of class u in like dam
Explanation:
Pls help I’m about to cry I cant do this it’s due in ten min
Answer:
C
Explanation:
When a dentist has you do xrays there are waves thats what the vest is for
What is the mass of an object accelerating at 10 m/s2 when a force of 10 N is applied?
Answer:
Anaesthesia & Intensive Care Medicine
Volume 6, Issue 9, 1 September 2005, Page 294
Force, mass and acceleration
Author links open overlay panelPhilDalrympleaRichardGriffithsb
https://doi.org/10.1383/anes.2005.6.9.294
Get rights and content
Abstract
Force, mass and acceleration are everyday words but often used inaccurately. Force is a physical influence, which when applied to an object causes it to accelerate in the direction from which it was applied. Mass is the amount of matter in an object and is expressed in kilograms. Acceleration is the rate of change of velocity of an object in the same straight line of the unbalanced force. When forces become balanced, there is no net force and therefore no movement. Newton’s second law links these three terms and concerns the effect that an unbalanced force has on the motion of an object. It states that the rate of change of velocity of an object is directly proportional to the force applied and takes place in the direction of the force. It is summarized by the equation: Force (N) = mass (kg) × acceleration (m/s2). Thus, an object of constant mass accelerates in proportion to the force applied. Gravity is the variable force of attraction between any two objects. All matter possesses gravitational ‘pull’ towards other matter. The amount of gravity between two objects is dependent on their mass and the distance between their centres. The word ‘weight’ in its proper context refers to the downward vertical force exerted on an object as a result of the earth’s gravity. An object with greater mass is therefore subjected to a greater gravitational force (i.e. it has greater weight).
Which of the following is an example of a situation in which an egg is receiving thermal energy through convection?
A. The egg is kept warm by its mother in the nest
B. An egg cracked on a hot sidewalk starts to cook
C. The egg is hard boiled in a pot of water
D. A metal pan on the stove fries the egg
What is the transfer of thermal energy due to direct contact?
Answer:
Conduction
Explanation: In conduction, heat is transferred by direct contact. The better the conductor, the more rapidly heat will be transferred.
How are science and technology related
There is no answer, science is about empirical knowledge, technology is the sum of techniques, skills, methods, and processes. I do not believe that you will find a answer for that.
CaCO3(s)+2H*(aq) →Ca2+ (aq)+H2001+CO262)
Initial
Initial Concentration
Experiment
Massof CaCO3(s) (grams) of Haq) (M)
1
5.00
1.0
2
5.00
2.0
Initial Temperatureof
Reactants (°C)
25.0
25.0
The initial rate of formation of CO2(e) from the chemical reaction represented by the
equation above was studied in two separate experiments. The table above provides the
experimental conditions used. If both experiments are carried out with finely powdered
samples of the solid and 50.0mL of HCl(aq), which experiment, if any, will have the faster
initial rate of formation of CO2(g) and why?
The rate of formation of CO2(g) will be the same because the mass of CaCO3(s) and the volume of
HCl(aq) used will be the same in both experiments.
CO2(g) will be formed at a faster rate in experiment 2 because more H* particles can react per
unit time.
O CO26) will be formed at a faster rate in experiment 1 because the proportion of CaCO3(s)
particles to H* particles will be greater.
The rate of formation of CO2(e) will be the same because the surface area of the solid and the
average kinetic energy of the particles will be the same in both experiments.
Answer:CO2(g) will be formed at a faster rate in experiment 2 because more H+ particles can react per unit time
Explanation:
[tex]CO_2_{(g)}[/tex] will be formed at a faster rate in experiment 2 because more H+ particles can react per unit time. The correct option is C.
What is a chemical reaction?A chemical reaction is a process that transforms one or more substances, known as reactants, to one or more different substances, known as products. Chemical elements or compounds are examples of substances.
Combination, decomposition, single-replacement, double-replacement, and combustion are the five basic types of chemical reactions.
Analyzing the reactants and products of a specific reaction will allow you to categorize it. Some reactions will fall into multiple categories.
If both experimental studies are carried out with finely powdered samples of the solid and 50.0mL of HCl (aq), then [tex]CO{_2_{(g)}[/tex] will be formed at a faster rate in experiment 2 because more H+ particles can react per unit time.
Thus, the correct option is C.
For more details regarding a chemical reaction, visit:
https://brainly.com/question/29039149
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what is lost or gained during a nuclear reaciton
Answer:
Electrons
Explanation:
In nuclear fission, atomic nuclei split into lighter atoms through loss of protons and neutrons (such as through loos of a beta particles - 2 protons and 2 neutrons). ... Electrons are not involved in nuclear reactions. Electrons are mainly involved in chemical
what is the correct answer ??
Answer:
Quantum mechanical which is described by the Greek letter phi that describes how energy is transmitted as electrons change or jump from one shell to the nextThe average size of a grocery store chicken has more than doubled in the past century. What is the most likely reason for this change?
Complete Question:
The average size of a grocery store chicken has more than doubled in the past century. What is the most likey reason for this change?
Group of answer choices.
A. Natural selection resulted in a larger species of chicken.
B. Artificial selection created a larger breed of chicken.
C. Mutations occur less frequently in chickens than they did a century ago.
D. Grocery stores used to sell younger chickens.
Answer:
B. Artificial selection created a larger breed of chicken.
Explanation:
The average size of a grocery store chicken has more than doubled in the past century. The most likely reason for this change is that artificial selection created a larger breed of chicken.
Artificial selection, also known as selective breeding can be defined as the process of identifying desirable traits in living organisms such as animals and plants, and selectively taking steps to ensure that those phenotypic traits are perpetuated in the offsprings or future generations.
This ultimately implies that, farmers or breeders are saddled with the responsibility of choosing which plant or animal are selected for the production of favorable (special) offsprings.
safety.
1. Drop a paper of A-4 size and a piece of wood/plastic about 2-3 inches long,
rom a height more than 10 feet. Note the time for both to hit the ground. Now repeat
he experiment by folding the paper once, twice, thrice... (as many time as you can).
Vhy every time the travel time reduces for paper and remains the same for
ooden/plastic piece. Does the paper at any stage hit ground before wooden/plastic
ece? If yes, then why?
(3 marks)
Answer:
because gravitational force effects on wood as compare to paper
How are the atoms of group 16 elements become
stable?
A- By losing two electrons
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B - By gaining two electrons
C - By losing six electrons
D - By gaining six electrons
Answer:
B - by gaining 2 electrons
Explanation:
Answer:
The atoms of group 16 elements become
stable by gaining two electrons.
answer this in your own words and I will mark brainlist
Answer:
hlo please help me to do my question
Answer:
hii i m here hope your day will energitic
How many valence electrons does this contain... 1s^2 2s^2 2p^4 HOw do you figure this out
Answer:
6
Explanation:
The electronic configuration of the atom is:
1s² 2s² 2p⁴
The valence electrons are the electrons in the outermost shell of an atom. The number electrons in the highest orbitals with the highest quantum number will determine the valency of the atom.
For the given atom:
2s² 2p⁴ is the orbital = 2 + 4 = 6
There are 6 valence electrons in the given atom
how does energy from the some travel to earth
Answer:
Bye the way, u welcome ;)
In heat transfer by radiation, energy is carried by electromagnetic waves from a starting point to the space surrounding it and does not involve contact with matter. The other forms of heat transfer cannot produce any of the energy that arrives to Earth through the vacuum of space.
What is empirical formula of N306?
Answer:
[tex]NO_{2}[/tex]
Explanation: The empirical formula of a compound is the simplest whole number ratio of atoms in the compound. In [tex]N_{3} O_{6}[/tex], the ratio of N atoms to O atoms is 3:6, which can be reduced to 1:2. Using the reduced ratio, put new subscripts on the compound: [tex]N_{1} O_{2}[/tex]. Since subscript of 1 on the N is implied, no subscript needs to be written on the N, and the empirical formula is simply [tex]NO_{2}[/tex].
i need the name of the substance showing the steps: N2H4
what is the mass of an atom that has 8 protons 8 electrons and 10 neutrons
Answer:
15.999 it would turn into 16 then.
Explanation:
If the element has 8 protons that means the atomic number is 8 which is on the periodic table, which shows oxygen has the atomic number of 8. Oxygen has an atomic mass of 15.999 which rounds up to 16, hope this helps.
I need help on question 3
Vivian went on a bicycle trip through Germany with her family. One afternoon, she rode her bicycle along a long flat road at a constant speed for 24 kilometers (km). The ride took her 1.2 hours (h). At what speed did she ride her bicycle?
A. 0.05 h/km
B. 20 mi/h
C. 20 km/h
D. 28.8 km•h
Answer:
d = distance traveled by her on her bicycle on a long flat road = 24 kilometer
t = time taken by her to travel distance "d" on her bicycle on a long flat road = 1.2 hours
v = average speed of vivian = ?
we know that average speed is given as
v = d/t
inserting the values in the above formula
v = 24 kilometer / 1.2 hour
v = 20 kilometer/hour
hence the correct choice is
C) 20 km/h
A gas:
A.has a fixed volume but takes the shape of its container
B.has a fixed volume and shape.
C.has no fixed volume or shape
What is the Molar Mass of BaCl2?
Ca + HCl -> CaCl2 + H2 Li + H2O -> LiOH + H2 NH3 + O2 -> NO + H2O K + O2 -> K2O
Answer:
Are you trolling us?
Explanation:
if a suspension of standing water where is zero gravity would it separate
The combined forces acting on an object make up the ___ force
Answer:
net force
Explanation:
The net force acting on an object is the combination of all of the individual forces acting on it. ... If two forces act on an object in the same direction, the net force is the sum of the two forces.