I NEED HELP NOW!!!!!!!!!!!
Which ball (frame A or B) is moving with a higher velocity when it strikes the ground, and which ball has the greatest kenetic energy?
A: the ball in frame A had the highest velocity, and the ball in frame B has the highest kinetic energy
B: the balls in frame A and B have the same velocity, while the ball in frame B had the highest kenetic energy
C: the ball in frame B has the highest velocity and the highest kenetic energy
D: the ball in frame A has the highest velocity and the highest kenetic energy
Answers
A: the ball in frame A had the highest velocity, and the ball in frame B has the highest kinetic energy
Related Questions
please help which one is it
Answers
Answer:
17 g
Explanation:
Is this a balanced equation? 4NH3+ 5O2 – 4NO + 5H20
Answers
Answer:
The reaction is not balanced.
Explanation:
The reaction expression is given as:
4NH₃ + 5O₂ → 4NO + 5H₂O
In a balanced reaction equation, the number of atoms on both sides of the expression is the same.
Now let us investigate;
Elements N H O
Reactants 4 12 10
Products 4 10 9
We see that the number of H and O on both sides of the expression is not the same. The reaction is not balanced.
plz help me I swear to God i will mark you brainiest
Answers
what is the reactant of 2Fe2O3 = 4Fe + 3O2
Answers
It depends on the direction of the arrow.
If the arrow goes like this ---> the reactant would be 2Fe2O3
If the arrow goes like this <--- the reactants would be 4Fe + 3O2
How will you prepare hydrogen from zinc and dilute acid.
Answers
Dilute Hydro chloric acid is added To zinc granules. The hydrogen produced is then passed through anhydrous calcium chloride or concentrated sulphuric acid. The hydrogen collected by upward delivery because it is lighter than air. If the reaction is too slow Copper (II) Sulphate solution can be added to speed up the solution.
Zn (s)+ 2HCl (aq)———ZnCl2 (aq)+ H2(g).
Which of these characteristics will produce the most water dense water
Answers
Answer:
High salinity, low temperature.
Explanation:
A lot of salt is left behind. This leads to water with very high salinity
The salinity of the water increases as more salt is dissolved in it. High temperature, density and salinity produce the most dense water.
What is salinity of water ?Salinity influences the physical properties of water, such as density and heat capacity, together with temperature and pressure.
When two water samples of the same volume are compared, the water sample with the higher salinity will have more mass and be more dense.
The ocean's salinity is raised by both sea ice production and ocean water evaporation. However, processes that reduce salinity, such as the ongoing inflow of fresh water from rivers, precipitation of rain and snow, and melting of ice, constantly balance out these "salinity rising" causes.
Thus, salinity ,density and high temperature produce the water dense.
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1
The process of a solid turning into a liquid is called
Answers
Answer:
Melting
Explanation:
Once heat is added it will turn to a liquid
Melting is the process of turning solid to liquid.
aluminum reacts with 42g of iron(ii) sulfate. How many grams of iron are formed?
Answers
Answer:
15.44 gm
Explanation:
Hope it is helpful....
I need help with this question ASAP this should have 2 answers
Answers
Answer:
The correct answer is B. and C. according to me!
Answer:
A. and C.
no explanation...
Which of the following electromagnetic waves has the shortest wavelength
Answers
Gamma rays have the shortest wavelength
I would appreciate help on writing an equalibrium constant expression.
Answers
Explanation:
it would be
[tex]kc = (products) \div (reactants) \\ kc = \frac{nh3)^{2} \times (co2) \times (h2o)}{(nh4)^{2}co3 }[/tex]
this the expression however when you are working out Kc do not include nh4^2co3 as it is a solid and it's concentration remains constant so remember to remove the nh4^2co3 and usage would just have the top part to work out ok
Which is one factor that describes a Mediterranean climate?
has many trees
is found in inland areas
has cool and rainy winters
has little to no precipitation
PLEASE I WILL MARK BRAILIEST AND GIVE 30 PTS
Answers
Answer:
dry
polar
highlands
temperate marine
temperate continental
Explanation:
is phosphorus a pure substance or mixture
Answers
Answer: it is Not a pure substance because it consists of sodium so it would be a mixture because it contains sodium
Explanation:
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its mixture
Explanation:
phosphorus atoms has 15 electrons and 15 protons with valence 5 electron in outer shell and is highly reactive element
Why is there a border between light and dark on the moon
Answers
Answer:
because the sun illuminates the half of the moon that's facing it leaving the other half dark
Write the chemical formula for each:
ammonium nitrate
iron(II) sulfide
magnesium hydroxide
titanium(II) chloride
cobalt(III) oxide
potassium sulfide
barium acetate
magnesium bromide
lithium carbonate
potassium permanganate
Answers
Answer:
Ammonium nitrate is NH4NO3
iron(II) sulfate is FeSO4
magnesium hydroxide is MG(OH)2
titanium(II) chloride is TiCI2
cobalt(III) oxide is Co2O3
potassium sulfide is K2S
Barium acetate is C4H6BaO4
magnesium bromide is MgBr2
lithium carbonate is Li2CO3
potassium permanganate is KMnO4
What happens when Na forms an ionic bond?
O it gains one electron and becomes a -1 anion
it loses one electron and becomes a +1 cation
It loses 2 electrons and becomes a + 2 cation
It shares electrons with the other atom in the bond
Look at picture
ASAP please will mark as brainlist don’t got much time
Answers
Answer:
in this also 1st option is correct because na is also a metal and metal gains electron...
Above is a solubility curve for KNO3.
Solubility has nothing to do with the speed of dissolving; it's a measure of how much salt will dissolve at a given temperature.
The y-axis of the graph shows you how much KNO3 will dissolve in 100 g of water. In other words, it tells you the maximum amount of solute that will dissolve at different temperatures.
The x-axis tells you the minimum temperature needed to dissolve different amounts of KNO3 in 100 g of water.
Approximately how many grams of KNO3 will dissolve in 100 g water at 0 degrees Celsius?
Type in the number only; no units. Round your answer to the nearest whole number.
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Answers
About 9.8 g of potassium nitrate will dissolve in about 100 g of water at 0 degrees Celsius.
What is solubility curve?The term solubility curve refers to a plot of the concentration of a substance in solution against temperature. We can easily read off the amount of substance that has dissolved in solution using the solubility curve.
Looking at the solubility curve as shown, we can see that about 9.8 g of potassium nitrate will dissolve in about 100 g of water at 0 degrees Celsius.
Learn more about solubility curve:https://brainly.com/question/10843981
please help which one is it
Answers
Answer:
answer is 0.5
Explanation:
H= 2X l =2
0=16 xl = 16
So 16+2=18
lmol of H2O → 18g
xmol of H2O →9g
:. 9÷ 18=0.5
x= 0.5
SHOW WORK
What volume of concentrated nitric acid (15.8 M) is needed to prepare 4.0 L of a 2.0 M solution?
Answers
M
a
= 6.77M - the initial molarity (concentration)
V
a
= 15.00 mL - the initial volume
M
b
= 1.50 M - the desired molarity (concentration)
V
b
= (15.00 + x mL) - the volume of the desired solution
(6.77 M) (15.00 mL) = (1.50 M)(15.00 mL + x )
101.55 M mL= 22.5 M mL + 1.50x M
101.55 M mL - 22.5 M mL = 1.50x M
79.05 M mL = 1.50 M
79.05 M mL / 1.50 M = x
52.7 mL = x
59.7 mL needs to be added to the original 15.00 mL solution in order to dilute it from 6.77 M to 1.50 M......
Also you kinda cute what’s up :)
Write the word and balanced chemical equations for the reaction between:
Sulfuric acid + aluminum hydroxide
Answers
Answer:
Alumminum hydroxide reacts with sulfuric acid as follows: 2Al(OH)3+H2SO4-->Al2(SO4)+6H2O.
Explanation:
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Which salt is the most soluble in water at 50⁰c
Answers
Answer:
Table salt, or sodium chloride (NaCl), the most common ionic compound, is soluble in water (360 g/L)
The process by which oxygen reacts with iron minerals in rock to form rust is called
Answers
Explanation:
your answer is oxidation
Answer:
Oxidation
Explanation:
Approximately what is the minimum temperature needed to dissolve 10 g of KNO3 in 100 g H2O?
Round your answer to the nearest whole number and type in the number only; no units.
Answers
Answer:(a) Potassium nitrate will begin to crystallise at about 56 °C, when its solubility is 100 g/100g water.
Explanation:
i need help please asap
Answers
Answer:
Bonding in chemistry is known as chemical bonding which means the interaction or attraction between molecules.
Chemical bonds are of different type such as ionic, covalent, hydrogen, and metallic. Ionic bonds are formed by the transfer of valence electron from one atom to other and there is unequal distribution of electrons between two or more atoms. Ionic bonds forms two oppositely charges ions positively charged (loses electron) or negatively charged (gains electron).
Covalent bond are the strong chemical bonds that form due to equal sharing of electron pairs between atoms. They form a stable element and have stable attraction or repulsive forces.
What is an ion atom?
Answers
If 220 grams of C3H8 react with 20 grams of O2, how much CO2 can be formed?
Answers
Answer:
Explanation:
WHOEVER ANSWERS A GOOD ANSWER I WILL GIVE BRAINLIEST!
What would happen to the rate of evaporation if you moved all the containers outdoors into direct sunlight?
Answers
Answer:
Molecules contained in a liquid evaporate from the surface area. This means that the larger the surface area, the faster the rate of evaporation. ... This means all the other factors that affect the rate of evaporation are identical. Leave the containers for one hour.
Explanation:
Answer:
Evaporation would accelerate.
Explanation:
Direct sunlight increases the thermal energy on the containers, increasing evaporation.
Fill in the blanks to create the lesson question,
which is the broad question about gases that
Boyle's law answers. You will explore this
question in the lab experiment.
Lesson Question: What is the effect of
V pressure v on the volume of a gas?
3
COMPLETE
LID
Hypothesis: If the pressure on a gas is increased,
then its volume will
because
the gas molecules will
DONE
Intro
Answers
Boyle's law states that If the pressure on a gas is increased, then its volume will decrease because the gas molecules will gets closely packed at high pressure.
What is Boyle's law?According to Boyle's law, at constant temperature the volume of a gas is inversely proportional to the pressure. Therefore, as the pressure is increased, volume of the gas is decreased.
The volume of a gas is the total space it occupied . The gaseous particles can diffuse anywhere at low pressure and they not collide each other at this maximum spreading condition.
When the pressure is increased, the force of intermolecular attraction increases make them more compressed and the space occupied by them that is the volume of the gas reduces.
To find more on Boyle's law here:
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Answer:
What is the effect of ✔ pressure on the volume of a gas?
Explanation:
edge 2023
A 328-g sample of water absorbs 5.78 × 103 J of heat. Calculate the change in temperature for the water. If the water is initially at 25.0 °C, what is its final temperature?
Answers
Answer:
The change in temperature for the water is 4.21 C and its final temperature is 29.21 C
Explanation:
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
There is a direct proportional relationship between heat and temperature. The constant of proportionality depends on the substance that constitutes the body as on its mass, and is the product of the specific heat by the mass of the body. So, the equation that allows calculating heat exchanges is:
Q = c * m * ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
In this case, you know:
Q= 5.78*10³ J c= 4.186 [tex]\frac{J}{g*C}[/tex] m= 328 g ΔT= Tfinal-TinitialReplacing:
5.78*10³ J= 4.186 [tex]\frac{J}{g*C}[/tex] *328 g* ΔT
Solving:
ΔT= [tex]\frac{5.78*10^{3} J }{4.186\frac{J}{g*C}*328 g}[/tex]
ΔT= 4.21 C
Being ΔT= Tfinal - Tinitial and Tinitial=25 C, then:
4.21 C= Tfinal - 25 C
4.21 C + 25 C= Tfinal
29.21 C= Tfinal
The change in temperature for the water is 4.21 C and its final temperature is 29.21 C
Which object would have a greater velocity change?
Answers
Answer:
The object with less mass will have a greater change in velocity
Explanation:
Answer:
the one with the smaller object mass becaise you get more force upon impact with less effort to move