Answer:
Yes
Explanation:
Remember, Newton's third law of motion; which says in part that "Every action has an equal and opposite reaction."
Hence, in this case, the fact that the doorbell rang out implies that there was another force that was exerted on it; which is, John's finger pressing the doorbell.
In other words, when John uses his fingers to press the doorbell button he applies a force (a mechanical force), and that force results in an opposite reaction; the ringing of the doorbell.
A student is a passenger in the front seat of a moving car. Which object is the BEST frame of reference for the student to determine how fast the car is moving relative to the ground?
A) A signpost on the side of the road
B) A truck traveling in the lane next to the car
C) The driver sitting next to the student
D) A person sitting in the backseat of the car
Answer:
the sing post
Explanation:
because the reference frame is a fixed object that determines whether a body is in motion or not so the other passengers are fixed but relative to the the the man is at rest but relative to the sign post it is in the motion, did I get me, sister
Identify each of the following as either an element or Compound. Write (E) for Element and (C)
for compound.
a. carbon
b. water
C. aluminum foil
d. plastic
e, tin
f. silicon dioxide
g. helium
h, arsenic
i. carbon dioxide
j. sodium chloride (table salt)
Carbon = C
Water = C
Aluminum foil = E
Plastic = E
Tin = E
Silicon dioxide = C
Helium = C
Arsenic = C
Carbon dioxide = C
Sodium Chloride = C
when a magnet is moved alongside a wire, what happens?
A. the electric movement stops
B. the protons move to the correct poles
C. the magnet repels like forces
D. the electrons in the wire begin to flow
Explanation:
D.the electrons in the wire begin to flow
how many moles of h20 are produced from 3 moles of oxygen?
Answer:
Stoichiometric Values in a Chemical Reaction
Explanation:
The coefficients next to the reactants and products are the stoichiometric values. They represent the number of moles of each compound that needs to react so that the reaction can go to completion.
Which is the most likely to be reduced?
Answer : The correct option is, [tex]Zn^{2+}[/tex]
Explanation :
Oxidation reaction : It is defined as the reaction in which a substance looses its electrons. That means, the loss of electrons takes place.Or we can say that, oxidation reaction occurs when a reactant losses electrons in the reaction.
Reduction reaction : It is defined as the reaction in which a substance gains electrons. That means, the gain of electrons takes place.Or we can say that, reduction reaction occurs when a reactant gains electrons in the reaction.
According to the electrochemical series, [tex]Zn^{2+}[/tex] most likely to be reduced because
Hence, the ion most likely to be reduced is [tex]Zn^{2+}[/tex].
The most likely to be reduced is Cu ²⁺. Because it is stronger oxidizing agent.
What is an oxidizing agent ?In a redox chemical reaction, an oxidizing agent is a material that "accepts" or "receives" an electron from a reducing agent. So every substance that oxidizes another material is an oxidant.
A material that induces oxidation by receiving electrons becomes reduced when it acts as an oxidizing agent. A chemical that reduces something by gaining electrons is said to be an oxidizing agent.
The reduction that takes place, which involves Cu, is the one with the highest positive reduction potential. This is because either Cu2+ is a stronger oxidizing agent than Zn2+ or Cu2+ is more likely to be reduced than Zn2+.
Thus, option D is correct.
To learn more about oxidizing agent, follow the link;
https://brainly.com/question/10547418
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a student practicing for a track meet ran 300 meters in 30 seconds. what was her average speed?
Answer:
10 m/sExplanation:
Her average speed can be found by using the formula
[tex]v = \frac{d}{t} \\ [/tex]
d is the distance
t is the time taken
From the question we have
[tex]v = \frac{300}{30} = 10 \\ [/tex]
We have the final answer as
10 m/sHope this helps you
Date:
Why do scientists study fossils?
A.
to understand how volcanoes are formed
B.
to understand life on Earth as it was millions
of years ago
C.
to understand when mountains were created
Answer:
b
Explanation:
Answer:
I think ur answer would be B
Explanation:
Hope this helps
What is the name of this formula MnN?
Balance Na2CrO4 + AlPO4
Answer:
2Na3PO4 + Al2(CrO4)3
Explanation:
these are the products
The balanced equation is 3 Na₂CrO₄ + 3 AlPO₄ ⇒ 2 Na₃PO₄ + Al₂(CrO₄)₃.
Let's consider the unbalanced chemical equation that occurs between Na₂CrO₄ and AlPO₄. This is a double displacement reaction.
Na₂CrO₄ + AlPO₄ ⇒ Na₃PO₄ + Al₂(CrO₄)₃
We will balance it using the trial and error method.
First, we will balance Na atoms by multiplying Na₂CrO₄ by 3 and Na₃PO₄ by 2.
3 Na₂CrO₄ + AlPO₄ ⇒ 2 Na₃PO₄ + Al₂(CrO₄)₃
Finally, we get the balanced equation by multiplying AlPO₄ by 3.
3 Na₂CrO₄ + 3 AlPO₄ ⇒ 2 Na₃PO₄ + Al₂(CrO₄)₃
The balanced equation is 3 Na₂CrO₄ + 3 AlPO₄ ⇒ 2 Na₃PO₄ + Al₂(CrO₄)₃.
You can learn more about balancing equations here: https://brainly.com/question/7181548
what happends if you pour 1 litre of water on the surface of the moon?will it bounce? serouse answer please !
Answer:
Explanation:
Diffuse water molecules can persist at the Moon's sunlit surface, as discovered by NASA's SOFIA observatory in 2020. Gradually water vapor is decomposed by sunlight, leaving hydrogen and oxygen lost to outer space. Scientists have found water ice in the cold, permanently shadowed craters at the Moon's poles.
Krista is conducting an investigation to determine how much water is best for her
sunflower plants. She uses five plants and gives each a different amount of water for six
weeks. Each week, she measures the height of each plant. She records her findings in the
chart below.
THE EFFECT OF WATER ON SUNFLOWER PLANTS
Week 1 Week 2 Week 3 Week 4 Week 5
Week 6
Amount of
water per
week
50 ml
100 ml
150 ml
200 ml
What information should be recorded below the weeks? (Hint: The dependent variable
should be recorded in the data chart.)
O the time it took each plant to reach a certain height
O the amount of water each plant received
o the amount of sun each plant received
O the height of each plant every week
Answer: Option D:The height of each plant every week
Explanation: In any experiment there are two variables one is independent variable and one is dependent variable.
One values of the experiment that can be changed is the independent variable that is amount of water given to the plants each week.
The values that cannot be changed and is dependent on independent variable is called dependent variable. This means that they change due to the change in the independent variable.
Here, the information that is to be recorded is the dependent variable. Height of each plant every week.
how would I write these out
Answer:
Please see the attached image. The one on the left is the first one and the one on the right is the second one.
Hope that helps.
DESPERATE WILL GIVE BRAINLIST
Meiosis produces diploid cells.
True
False
Answer:
FalseMeiosis produces 4 haploid cells. Mitosis produces 2 diploid cells. The old name for meiosis was reduction/ division. Meiosis I reduces the ploidy level from 2n to n (reduction) while Meiosis II divides the remaining set of chromosomes in a mitosis-like process (division).Explanation:
Hope it helps
Answer:
False
Explanation:
Mitosis creates diploid cells, meiosis creates haploid cells.
which of the following is a compound A. Iron B. Alloy C. rock salt D. sugar
Answer:
I think iron sorry if its wrong goodluck!
How would one convert 5 decades to months (1 decade = 10 years)?
Answer:
A decade is 10 years. Therefore you must first multiply ten by five to get 50. After you multiply the 12 months in a year by the 50 years. Your answer should be 600
Explanation:
Answer:its d
Explanation:just took it
A flask containing 855 grams of water was heated. If the temperature of the water was raised from 21.0 to 85.0 degrees Celsius, how much heat (in joules) did the water absorb? the specific heat capacity of liquid water is 4.184J/g per C
Answer:
The heat absorbed by the water is 228,948.48 J
Explanation:
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
In this way, between heat and temperature there is a direct proportional relationship (Two magnitudes are directly proportional when there is a constant so that when one of the magnitudes increases, the other also decreases; and the same happens when either of the two decreases .). The constant of proportionality depends on the substance that constitutes the body and its mass, and is the product of the specific heat and the mass of the body. So, the equation that allows to calculate heat exchanges is:
Q = c * m * ΔT
where Q is the heat exchanged by a body of mass m, constituted by a substance of specific heat c and where ΔT is the variation in temperature.
In this case:
c= 4.184 [tex]\frac{J}{g*C}[/tex]m=855 gΔT= Tfinal - Tinitial= 85 °C - 21°C= 64 °CReplacing:
Q= 4.184 [tex]\frac{J}{g*C}[/tex] *855 g* 64 C
Solving:
Q= 228,948.48 J
The heat absorbed by the water is 228,948.48 J
The columns in the periodic table are called groups. What do the elements in Group 17 have in common
Answer:
They all have 7 valence electrons on it's outer shell.
Answer:
I have that question rn, I think the best answer is that they tend to form ions with a -1 electric charge.
Explanation:
please help quickly!
for the first one ignore what i have pressed as i just guessed and it wont let me remove answers
Answer:
Iron II - pale green
Copper II - blue
Iron III - orange /brown
Nickel - green
Iron and Copper
All alkali metals belong to which group?
A. group 17
B. group 1
C. group 2
D. group 12
Answer:
Group 1
Explanation:
Alkali metals are the chemical elements found in Group 1 of the periodic table. The alkali metals include: lithium, sodium, potassium, rubidium, cesium, and francium.
Answer:
1
Explanation:
mainly so that you can mark the other one brainliest
What percent of total energy consumption in the u.s in 2010 came from hydroelectric power? select the closest answer
Answer:
12% but u can put 8%
Explanation:
URGENT!! Can someone help me with this?
A sample of oxygen gas has a volume of 2.1 L at 3.6 atm pressure and 200 K temperature.
What would the volume of this sample be at 1.0 atm and 400 K?
Answer:
15.1L
Explanation:
Given parameters:
Initial volume = 2.1L
Initial pressure = 3.6atm
Initial temperature = 200K
Final pressure = 1 atm
Final temperature = 400K
Unknown:
Final volume of the sample = ?
Solution:
To solve this problem, we are going to use the general gas law or the combined gas law which is expressed below:
[tex]\frac{P_{1} V_{1} }{T_{1} } = \frac{P_{2} V_{2} }{T_{2} }[/tex]
P, V and T are pressure, volume and temperature
1 and 2 are the initial and final states
Now;
[tex]\frac{2.1 x 3.6}{200}[/tex] = [tex]\frac{1 x V_{2} }{400}[/tex]
200V₂ = 3024
V₂ = 15.1L
Answer:
15.1L
Explanation:
Given parameters:
Initial volume = 2.1L
Initial pressure = 3.6atm
Initial temperature = 200K
Final pressure = 1 atm
Final temperature = 400K
Unknown:
Final volume of the sample = ?
Solution:
To solve this problem, we are going to use the general gas law or the combined gas law which is expressed below:
P, V and T are pressure, volume and temperature
1 and 2 are the initial and final states
Now;
=
200V₂ = 3024
V₂ = 15.1L
Which of the following statements are true about energy and bonds?
Check all that apply.
A. Energy is necessary for bond formation.
B. Breaking bonds does not absorb or release energy.
C. Breaking bonds takes energy.
D. When bonds are formed, energy is released.
Answer:
A. Energy is necessary for bond formation.
C. Breaking bonds takes energy.
D. When bonds are formed, energy is released.
Explanation:
Energy is always required for bond formation because when a chemical reaction occurs, either molecular bonds are broken or other bonds are formed to make different molecules. Energy is released during bond formation and is an exothermic process because bond formation represents a stable configuration and the energy lost is released as heat energy that makes it more stable.
Breaking bonds takes energy and is an endothermic reaction because energy is absorbed to break bonds.
Hence, the correct answer is "A. Energy is necessary for bond formation.
C. Breaking bonds takes energy.
D. When bonds are formed, energy is released."
The process of moving water from its source to places where humans use it is called water diversion. true or false
Answer:
That is def true
Explanation:
If an atom has 7 protons, 8 neutrons and 9 electrons, what is the mass number?
Answer:
Its mass number is 15
And this element is nitrogen N
Explanation:
Because mass number = number of proton + number of neutrons
So 7+ 8 = 15
How can you explain therma expansion in terms of kinetic energy ? please help
Answer:
Heat causes the molecules to move faster (heat energy is converted to kinetic energy), which means that the volume of a solid or a liquid. ... The particles in the air do not have more kinetic energy than particles in the mercury, because they are the same.
Explanation:
I hope this help you!
What is the percent yield of lithium hydroxide from a reaction of 7.40 g of lithium with 10.2 g of water? The actual yield was measured to be 12.1 g.
2Li(s) + 2H2O(l) = 2LiOH(aq) + H2(g)
Select one:
a. 72.5%
b. 53.1%
c. 89.3%
d. 47.4%
Answer: d. 47.4%
What is the percent yield of lithium hydroxide from a reaction of 7.40 g of lithium with 10.2 g of water? The actual yield was measured to be 12.1 g.
Which statement is true of inclusions?
A. They are older than the rocks that contain them.
B. They are younger than the rocks that contain them.
C. They are the same age as the rocks that contain them.
Which is the most likely to be reduced
Answer:
B
Explanation:
Answer: Fe3+
Explanation: j took the quiz
PLEASE help due in 25 minutes
Determine the mass in grams of each of the following:
5.04 x 1024 atoms N
2.01 x 1024 atoms Ca
8.32 x 1021 atoms Sn
Determine the number of particles contained in each of the following:
50.3 g Cu
145g Si
0.67 g Cl
Answer:
method to do this given in explaination
Explanation:
divide the number of atoms with avagadro constant and multiply with the molar mass of each atom - to obtain the mass in g
divide the mass with molar mass and multiply with avagadro constant to obtain the number of particles
What involves 2 non metals ionic or covalent bonds
Answer:
A bond forms between two non metals is covalent
Explanation:
For example Chlorine Cl is a non metal bond in Cl - Cl is covalent