Answers
Related Questions
Two forces are described below: Force 1: The force with which Earth pulls a person to its center Force 2: The pulling force applied on a door to open it Which statement is true about the forces? A) Both are contact forces. B) Both are non-contact forces. C) Force 1 is a contact force and Force 2 is a non-contact force. D) Force 1 is a non-contact force and Force 2 is a contact force. PLEASE HELP
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Answer:
the correct answer is D
Answer:
It is D
Explanation:
Gravitational Force does not implie to have contact or if you want an easier explanation. Gravity doesn't touch you to move you.
Though you do need physical contact to open a door, because you are touching it!
How many sig-figs in the following measurements?
1.605 cm =
16.050 cm =
16.050 cm =
Write the answers to the appropriate number of sig figs
12 + 12.5 + 125 =
1.62 x 10^3/2.8 x 10^-5 =
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Answer:
1.605cm = 4 significant figures
16.050cm = 4 significant figures
16.050cm = 4 significant figures
12 + 12.5 + 125 = 149.5 = 4 significant figures
1.62 × 10^3/2.8 × 10^-5 = 1620/0.000028 = 11 significant figures
Difine an exothermic reaction
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Answer:
An exothermic reaction is a chemical reaction in which less energy is needed to break bonds in the reactants than is released when new bonds form in the products. During an exothermic reaction, energy is constantly given off, often in the form of heat. All combustion reactions are exothermic reactions.
Explanation:
Give an example of each: mechanical energy, electrical energy, chemical energy, thermal energy, sound energy.
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Answer:
Explanation:
Mechanical energy is basically "manual energy"; ex: hand held sharpener.
Electrical energy is related to electricity. ex: plug
Chemical energy: ex: chemical reaction
Thermal energy "heat". ex: stove
Sound energy "sound waves" ex: speaker
Hey, can someone help me? I haven't been getting answers to my q's lately, and somehow my questions keep getting deleted. This is simple and worth 13 points. If water has a density of 19.3g/ml. Will gold float or sink in water?
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Answer:
I haven't been getting answers either, so you're not alone. I am pretty sure it doesn't sink or float.
Explanation:
Gold has the same density as water, so it is neutrally buoyant. Hope this helps a bit!
Which of these is an example of a physical change?
O a banana ripening in the air
O hydrogen burning in the air
O zinc reacting with an acid
O liquid water turning into vapor
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Answer:
liquid water turning into vapor
Answer:
shes right liquid water turing into vapor is correct
Why does chlorine have a higher ionization energy than aluminum
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Calculate how many atoms are in 98.6 g Carbon (C)?
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Okay, lets see a breakdown of this. Let's say that you are given an amount of grams of a substance. For this case, lets say that that substance is Carbon (C). And, lets assume that you are given 4.01 g of Carbon, and you are tasked to find the number of atoms in that mass of Carbon. The breakdown would be as follows, with dimensional anaysis:
4.01
g Carbon
(
1
mol Carbon
12.01
g Carbon
)
(
6.022
⋅
10
23
a
t
m
s
C
a
r
b
o
n
1
mol Carbon
)
=
2.01
⋅
10
23
atms Carbon
Basically, I first wrote down the amount in grams, and I used the molar mass of Carbon (which can be found on the periodic table under Carbon) 12.01 g/mol to convert 4.01 g of Carbon to moles of Carbon. Then, I used "Avogadro's Number", or
6.022
⋅
10
23
atoms per mole
to convert the mole amount to atoms of Carbon.
The process should be very similar with other such atoms, just make sure to keep your periodic table and calculator handy.
I hope that helps!
1.Dante loves taking care of the chickens on his farm. He feeds them rice everyday. His Grandma told him that he should feed them corn everyday instead of rice because it will make them grow fatter. He decides to do an experiment to test what type of food will make his chickens fatter. Before the experiment, the chickens weigh an average of 5 pounds. David makes two groups of chicken. He feeds Group A rice everyday, and feeds Group B corn everyday. After on month, David weighs the chickens to see if they gained any weight. Group A weighs an average of 5 pounds and Group B weighs an average of 7 pounds. What is the Dependent (Outcome) Variable of this experiment?
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Answer:
The dependent variable is the chicken weight
Explanation:
The experiment was carried out to determine the relationship between the size of chickens and the food with which they are fed.
However, to determine the size of the chickens, the weight of the chickens were taken
The two different experimental treatment was administered separately to the two groups of experimental units
The independent variables are;
1) The type of treatment administered which could be either;
i) Feeding the chickens with corn
ii) Feeding the chickens with rice
2) The duration for which the treatment was administered
The dependent variables is the weight of the chicken after being subjected to one of the two experimental treatments.
what two bodies of water form a key transportation route connecting the interior of Canada to the Atlantic Ocean? and its science.
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Answer:
Lake Ontario and St Lawrence Seaway
Explanation:
The Great Lakes are connected to the Atlantic Ocean through the St. Lawrence Seaway.
What gas is measured in an ICE CORE and what is the correlation between that gas and temperature?
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Answer:
Explanation By looking at past concentrations of greenhouse gasses in layers in ice cores, scientists can calculate how modern amounts of carbon dioxide and methane compare to those of the past, and, essentially, compare past concentrations of greenhouse gasses to temperature. Ice coring has been around since the 1950s.n:
Answer:
oh what the guys said above me
how do you do this? do you multiply the two together, and in that case how do you get the finishing unit?
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Answer:
divide 25 and hours by 1 hour then 60 mins by (1) then you'll get 60/ 25 then divide the two and you get 2.4 which is 12/5 that should be your answer
name the five methods used for the formation of salts??
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Explanation:
In chemistry, a salt is a chemical compound consisting of an ionic assembly of cations and anions.[1] Salts are composed of related numbers of cations (positively charged ions) and anions (negatively charged ions) so that the product is electrically neutral (without a net charge). These component ions can be inorganic, such as chloride (Cl−), or organic, such as acetate (CH
3CO−
2); and can be monatomic, such as fluoride (F−) or polyatomic, such as sulfate (SO2−
4).
Starch is a type of: Protein Fat Nucleic acid Sugar
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Answer:
it's not a protien at all
Explanation:
Starch is not a protein. Starch is a type of carbohydrate. It is a polysaccharide, it has lots of sugars though
Ibuprofen is a common pain reliever and anti-inflammatory. Its formula is C13H18O2. What percent by mass of ibuprofen is the carbon? (A calculator can be used) A) 75.68 % B) 33.33% C) 13.00% D) 39.39%
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Answer:
Explanation:
%Carbon = mass of carbon / mas of C13H18O2) X100%
= 13X12/ (13X12+18+2X16)X100%
= 156/206) X100%= 75.7%
how does temperature affect density in water? explain
I said chemistry but i'm taking earth scence
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Explanation: Temperature Affects Density
When the same amount of water is heated or cooled, its density changes. When the water is heated, it expands, increasing in volume. ... The warmer the water, the more space it takes up, and the lower its density.
Answer:
momomomom
Explanation:
its wronh hjjvbkjgddujbxsdsssrrfghjnnkhftygdfff
covalent bonds usually form between atoms of _______?
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Answer:
Non-metals
Explanation:
Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom.
What does chlorophyll do?
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If the plum pudding model of the atom was correct, what should the results of Rutherford’s experiment be?
Most of the positively charged particles should bounce back at a range of angles as they collide with the atoms in the foil; only a few should pass straight through the foil.
Most of the positively charged particles should pass straight through the foil because they move easily through the positively charged matter in the gold atoms.
Most of the positively charged particles should collide with the foil and stay there because they stick to the negatively charged gold atoms.
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Answer:
most of the positively charged particles should bounce back at a range of angles as they collide with the atoms in the foil; only a few should pass straight through the foil
Explanation:
The value of the boiling point elevation constant (Kb) depends on the identity of the:_______.
a. solute
b. solvent
c. most important solvent-solute interaction
d. ions formed upon solution of an electrolyte
e. solute and solvent
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The value of the boiling point elevation constant (Kb) depends on the identity of the solute and solvent. Thus option E is correct.
what are boiling point and melting point ?The major difference is that the melting point is the temperature at which solid and liquid phases are at equilibrium state, whereas the boiling point is the temperature at which the vapor pressure of a liquid is equal to the external pressure.
Melting point in which the solid will start melting to become a liquid at a given temperature, the molecules gain enough amount of kinetic energy to overcome the intermolecular forces to convert into another form.
Another term called the freezing point is the temperature at which conversion of a liquid into solid occur.
Boiling point at which , the liquid substance enters into the gaseous phase, when the external pressure is high then a higher temperature for the vapor pressure is needed to become equal to the external pressure.
Thus option E is correct.
Learn more about boiling point, here:
https://brainly.com/question/28203474
#SPJ6
HELP please, 50 points 5 minutes timed
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Answer:
Coordinate geometry is one of the most important and exciting ideas of mathematics. In particular it is central to the mathematics students meet at school. It provides a connection between algebra and geometry through graphs of lines and curves. This enables geometric problems to be solved algebraically and provides geometric insights into algebra.
The invention of calculus was an extremely important development in mathematics that enabled mathematicians and physicists to model the real world in ways that was previously impossible. It brought together nearly all of algebra and geometry using the coordinate plane. The invention of calculus depended on the development of coordinate geometry.
Explanation:
10. a. What is the binding energy released when an alpha particle of mass 6.64 x 10-27 kg escapes from the nucleus of Uranium- 238? C = 3.00 x 108m/s. Give formula. show substitutions, and answer
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Answer:
The binding energy released is 1.992 X 10⁻¹⁸ J
Explanation:
Given;
mass of the alpha particle, m = 6.64 x 10⁻²⁷ kg
speed of the alpha particle, c = 3 x 10⁸ m/s
The binding energy released is given by;
[tex]E_b = mc^2[/tex]
where;
m is mass of the particle
c is speed of the particle
E = 6.64 x 10⁻²⁷ (3 x 10⁸)²
E = 1.992 X 10⁻¹⁸ J
Therefore, the binding energy released is 1.992 X 10⁻¹⁸ J
Reactant P contains 50 J of energy, and reactant Q contains 35.3 J of energy. The reactants combine to form product PQ, which contains 104 J of energy. What is the energy transformation? Energy is absorbed because the product has more energy than the reactants have. Energy is absorbed because the product has less energy than the reactants have. Energy is lost because the product has more energy than the reactants have. Energy is lost because the product has less energy than the reactants have.
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Answer:
Energy is absorbed because the product has more energy than the reactants have.
Explanation:
its A
yall welcome please like and give 5 starts thanks yall
N2O difference in electronegativity
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Name the compound formed when a copper cation has a 2+ charge combined with a bromine anion that has a 1- charge.
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Answer: The compound is called copper (II) bromide or cupric bromide
Explanation:
Is argon made of atoms or molecules?
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ELEMENTS ARE ATOMS
brainliest?
What are the independent and dependent variables in this experiment?
Mass is the independent variable, and boiling point is the dependent variable.
Boiling point is the independent variable, and mass is the dependent variable.
There are two independent variables and no dependent variables.
There are two dependent variables and no independent variables.
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Answer:
Mass is the independent variable, and boiling point is the dependent variable.
Explanation:
Answer:
A is the answer on edge
An element has this information:
15 protons, 13 neutrons, 14 electrons
What is the name of this element?
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Answer:
hydrogen
Explanation:
What is the older name for lanthanides and actinides?
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Answer:
inner transition metals
what makes up the compound H2O?
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Answer:
2 hydrogen atoms bonded with 1 oxygen atom
Explanation:
In the compound [tex]H_{2} O[/tex], the number 2 after the H means that there are two atoms in the preceding letter (element), and since there are no numbers ofter the O, that means there is only 1 atom.
