Answer:
electrical power. nnnnnnn
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.
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.
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
The 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.
Ca + HCl -> CaCl2 + H2 Li + H2O -> LiOH + H2 NH3 + O2 -> NO + H2O K + O2 -> K2O
Answer:
Are you trolling us?
Explanation:
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
Please help. I’m really struggling. No wrong answers please, if you don’t know it please don’t answer, I’m already failing the class.
Answer:
[tex]C_{3}H_{3} O_{1}[/tex]
Explanation:
There are empirical formula calculators on the search engine that starts with G (This word is blocked by Brainly) and if you really need to use it, there's an option you can choose. However, I will try to explain this.
C = 65.4
H = 5.5
O = 29.1
We first need to divide the percentages by their molar mass.
65.4/12.01 = 5.44
5.5/1.008 = 5.46
29.1/16 = 1.8
We then need to divide these numbers by the smallest number we obtained.
1.8 is smaller than 5.46 and 5.46, so we would divide all three numbers with 1.8.
5.44/1.8 = 3
5.46/1.8 = 3
1.8/1.8 = 1
This means that there are 3 atoms of C and H and 1 atom of O, giving us the empirical formula of [tex]C_{3}H_{3} O_{1}[/tex].
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.
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.
In what situation can energy be created or destroyed?
1. in a nuclear reaction
2. during photosynthesis
3. never
4. when work is done
How many moles are there in 1.20x10^24 units of Platinum?
Answer:
#50316 in Other Chemistry for Meagan
How many moles of glucose does 1.2 x 1024 molecules represent? 1 mole of any substance has 6.02 x 1023 . For getting thenumber of moles we can divide 1.2 x 1024/6.02 x 1023 and we receive 2 moles.
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.
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
For problems 1-6, find the average atomic mass of the following mixtures of isotopes. Show your work for full credit. Iodine-127 (80%), Iodine-126 (17%), Iodine-128 (3%)
Answer:
126.86
Explanation:
Iodine-127 (80%)
Iodine-126 (17%)
Iodine-128 (3%)
For a mixture of isotopes, the average atomic mass is obtained by summing the multiplication of the atomic mass and percentage composition of the individual isotopes. This is given as;
Average Atomic Mass = ( 80 / 100 * 127) + (17 / 100 * 126) + (3 / 100 * 128)
Average Atomic Mass = 0.8 * 127 + 0.12 * 126 + 0.03 * 128
Average Atomic Mass = 101.6 + 21.42 + 3.84 = 126.86
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
Why is it helpful to cross my organisms
A test cross can help determine whether a dominant phenotype is h.o.m.o.zygous or heterozygous for a specific allele.
hope this helps ^^
I need help on question 3
how do i get the area of a shape
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
#SPJ2
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.
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
Hi, please I need help
Calculate the mass of ethanol (alcohol) that theoretically can be made by fermenting 1.00kg of sugar. The equation is:
C₁₂H₂₂O₁₁(aq)+H₂O(I) = CH₃CH₂OH(aq)+CO₂(g)
sugar ethanol
The mass of ethanol (alcohol) = 538.016 g
Further explanationGiven
Reaction
C₁₂H₂₂O₁₁(aq)+H₂O(I) = CH₃CH₂OH(aq)+CO₂(g)
1 kg of sugar = 1000 g
Required
The mass of ethanol
Solution
Balanced equation
C₁₂H₂₂O₁₁(aq)+H₂O(I) = 4CH₃CH₂OH(aq)+4CO₂(g)
mol of sugar (MW = 12.12+22.1+11.16=342 g/mol) :
mol = mass : MW
mol = 1000 g : 342 g/mol
mol = 2.924
From the equation, mol ratio of C₁₂H₂₂O₁₁ : CH₃CH₂OH = 1 : 4, so mol ethanol =
= 4 x mol sugar
= 4 x 2.924
= 11.696
Mass of ethanol(MW=46 g/mol) :
mass = mol x MW
mass = 11.696 x 46
mass = 538.016 g
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 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 nextgive reason joule is a derived unit
Joule is a derived unit as, J = Nm, and N = kg m/s². So, joule depends upon many such physical units and hence, it is a derived unit.
More:-
Derived units: Units which are dependent on other physical units are known as derived units. Ex: acceleration (a), velocity (v). Fundamental units: Units which do not depend upon other units. Ex: cd (candela), kg (kilograms), etc.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
I thought heavy elements like iron & gold were dense & sank into the interior of the molten planet? How did gold get on top of the less dense crust?
Answer:
If it is denser then water it shall float but if water has a higher density the object sinks
Explanation:
i need the name of the substance showing the steps: N2H4
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
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