Students investigated the motion of wooden blocks on ramps. They used two boards,
each two meters long, to create ramps. They set the ramps up at different heights, as
shown in the diagram below. Next they took two identical blocks (I and II) and placed
one at the top of each ramp. They placed the blocks so that the back edge of each
block was even with the edge of the ramp (distance =0 meters). The students held the
O
blocks so that the blocks would not slide until the students released them. The students
released the blocks at time = 0 seconds. They measured the total distance traveled by
each block at 1-second intervals as the blocks slid down the ramps. The students recorded
their results as shown below.
Name two forces that acted on the block as they slide down the ramps. Describe how each forced you listed affected on the motion of the block.
Answers
The forces that act on the blocks as they descend the ramp are;
Weight of the blockReaction force on the blockApplied forceFrictional forceWhat is force?Force is that which is able to produce a push or a pull. Force causes an object to move from one point to another. For the body that is moving down the ramp there are four forces that act on it;
Weight of the blockreaction force on the blockApplied forceFrictional forceThe weight of the block moves it downwards, the reaction force moves the block upwards, the applied force moves the block forward while the fricional force opposes the forward movement of the block.
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Related Questions
Balance the equation below:
NO2(g) + H2O(l) + O2(g) → 4HNO3(aq)
HELP PLEASE!
Answers
Explanation:
This is an oxidation-reduction (redox) reaction:
4 NIV - 4 e- → 4 NV (oxidation)
2 O0 + 4 e- → 2 O-II (reduction)
NO2 is a reducing agent, O2 is an oxidizing agent.
When balanced, which equation would have the coefficient 3 in front of any of the reactants? zn hcl zncl2 h2 h2so4 b(oh)3 b2(so4)3 h2o fe agno3 fe(no3)2 ag c2h4o2 o2 co2 h2o
Answers
The balanced equation which have the coefficient 3 in front of any of the reactants is 3H₂SO₄ + 2B(OH)₃ → B₂(SO₄)₃ + 3H₂O.
What are balanced equation?Those chemical equations in which number of each atoms pesent in reactant side as well as on product side is always equal to each other.
Let us consider the balanced equations for the given chemical reactions are:
Zn + HCl → ZnCl₂ + H₂Balanced form of the above reaction will be written as Zn+2HCl → ZnCl₂+H₂ where all atoms are present in equal quantity.
H₂SO₄ + B(OH)₃ → B₂(SO₄)₃ + H₂OBalanced form of the given reaction will be written as 3H₂SO₄ + 2B(OH)₃ → B₂(SO₄)₃ + 3H₂O, where coefficient 3 is present in before sulphuric acid and water molecule.
Fe + AgNO₃ → Fe(NO₃)₂ + AgBalanced form of above reation will be written as Fe+ 2AgNO₃ → Fe(NO₃)₂ + 2Ag.
C₂H₄O₂ + O₂ → CO₂ + H₂OBalnced form of above chemical equation will be represented as C₂H₄O₂ + 2O₂ → 2CO₂ + 2H₂O, and coefficient 3 is not used any where.
The quation which have the coefficient 3 is 3H₂SO₄ + 2B(OH)₃ → B₂(SO₄)₃ + 3H₂O.
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Answer: It's 3. H2SO4 + B(OH)3 B2(SO4)3 + H2O
what the similarities are between solid, liquid and gas particles of water.
Answers
A person’s
mass
will be the same on Jupiter and Earth. A person’s
height
will be greater on Jupiter than on Earth.
Answers
Question 3 someone help me please
Answers
Answer:
False ....
first of all gas is not the desirable product of combustion
Giardiasis is an intestinal parasite that can transmitted through person-to-person contact and infested swimming pools. This parasite is best classified as
nosocomial.
inherited.
contagious.
iatrogenic.
asymptomatic.
Answers
Answer:
I think it would be Contagious.
Explanation:
You get it from another person or from food and thats contagious.
How many moles of oxygen are necessary to generate 28 moles of water, according to the following equation: 2H2+O2→2H2O
Answers
The number of moles of oxygen required to generate 28 moles of water from the reaction is 14 moles
Balanced equation2H₂ + O₂ —> 2H₂O
From the balanced equation above,
2 moles of water were obtained from 1 mole of oxygen
How to determine the mole of oxygen neededFrom the balanced equation above,
2 moles of water were obtained from 1 mole of oxygen
Therefore,
28 moles of water will be obtained from = 28 / 2 = 14 moles of oxygen
Thus, 14 moles of oxygen are needed for the reaction
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Which beaker has the least thermal energy?
A. Beaker D
B. Beaker A
C. Beaker B
D. Beaker C
Answers
Answer:
________________________________
✏️ QUESTION:which doctor has the least thermal energy?
A. beaker D
B. beaker A
C.beaker B.
D. beaker C
________________________________
✏️ ANSWER:A. beaker D..
________________________________
#LetsEarthBreath
use the Gizmo to create a path for carbon that begins and ends in the atmosphere. Fill in the steps in the path below. Then, label each location with the system it represents. Finally, summarize very briefly how the carbon atom got to that location.
Answers
Volcanoes, burning fossil fuels, and respiration of organisms.
Explanation:
Volcanoes, burning fossil fuels, and respiration of organisms releases carbondioxide that forms atmospheric carbondioxide. The carbon enters in the biosphere through the process of photosynthesis. In plants, carbondioxide enters in the plant body which is used as a reactant from which food is prepared. The carbon present in the plant body in the form of glucose which can be transferred into another organism due to feeding of organisms. The organism released this carbon in the form of carbondioxide when the eaten food is broken down for the release of energy. In that way, carbon moves from biosphere to the atmosphere whereas Volcanoes and burning fossil fuels releases carbon in the atmosphere, in this way carbon moves from lithosphere to atmosphere.
What type of substance reacts with limestone (caco3) and produces carbon dioxide gas? a neutral substance a base an acid both an acid and a base
Answers
The type of substance which reacts with limestone and produces carbon dioxide gas is an acid.
What is limestone?Limestone is a basic compound with a molecular formula CaCO₃ and it reacts with acid to produce carbon dioxide gas.
Reaction between the limestone and an acid known as hydrochloric acid to produce carbon dioxide gas, water molecule and calcium chloride salt as:
CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O
Hence required substance is an acid.
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Answer:
c on edge
<3 hope this helps people.
Are things on fire or is fire on things?
Answers
Answer:
It will depend on the situation to call it either way
Explanation:
Which statement best describes how deflating a soccer ball is evidence of matter?
The ball changes shape from round to flat.
The ball increases size and shape.
The mass of the ball has increased.
The temperature outside the ball has changed.
HELP PLS WILL MARK BRAINLIEST
Answers
For the reaction below , label each reactant as an electron pair acceptor or electron pair donor and as a Lewis acid or a Lewis base. AlCl 3 +Cl^ -; AlCl 4 ^ -
Answers
Since the reaction shown in the question is an acid - base reaction in the Lewis sense; the Lewis acid here is AlCl3 while the Lewis base here is Cl^- .
What is a Lewis acid?A Lewis acid is a substance that accepts electron pair while a Lewis base donates an electron pair.
Now consider the given reaction; AlCl3 +Cl^- ------> AlCl 4 ^-. The Lewis acid here is AlCl3 while the Lewis base here is Cl^- .
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The pH of a solution is 8.43. What is the hydronium ion H30* concentration?
Answers
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydronium ion concentration.
Ph=-logH3O+
Putting in the values:
8.43=-log[H3O+]
[H3O+]=10^-8.43=3.7*10^-9
Thus H3O+ concentration is 10^-8.43
To determine the limiting reactant in a chemical reaction, one must know the:.
Answers
Answer:
The available amounts of each reactant
Explanation:
The limiting reactant is the reactant that will limit the equation.
For example, I have 2N2 and H2O. In this situation, H2O would be the limiting reactant since there is only one atom, while N2 has two atoms.
Think of it like you're making peanut butter and jelly. You have 50 cans of peanut butter and only 10 jelly. Which means you can only make sandwiches using 10 jars of jelly and 10 jars of peanut butter.
4. Compare and contrast the 2 reactions below and balance the reactions. Which reaction is
endothermic and which reaction is exothermic?
Answers
The first reaction is exothermic reaction because it release energy whereas the seocond equation is endothermic reaction due to absorption of energy.
Endothermic Reaction
The energy is absorbed from the surrounding environment in susch type of reaction. Energy is absorbed in the form of heat.
Exothermic ReactionThe energy is released from the reaction to its environment in this type of reaction. Energy is released as heat, electricity, light or sound.
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Global warming is an ongoing issue for debate. True or False? Question 2 options: True False
Answers
Answer:
(True) The answer to that is yes, global warming is a hotly debated topic.
Explanation:
As a matter of political controversy, global warming is often viewed from different political perspectives. Which is why it is still an issue. (In 1988, global warming became a topic of discussion.) A number of climate change-related phenomena are occurring due to climate change, including rising temperatures, droughts and wildfires, changing precipitation patterns, glaciers melting, and rising sea levels.
Hope this helps! :D
True
Explanation:
It is because global warming is a common issue that people debate.
A chemist combines 300 mL of a 0.3 M Na2SO4 solution with 200 mL of 0.4 M BaCl2 solution. How many grams of precipitate form
Answers
The mass of the precipitate, BaSO₄ obtained from the given reaction is 18.64 grams
How to determine the mole Na₂SO₄Volume of Na₂SO₄ = 300 mL = 300 / 1000 = 0.3 LMolarity of Na₂SO₄ = 0.3 MMole of Na₂SO₄ =?Mole = Molarity x Volume
Mole of Na₂SO₄ = 0.3 × 0.3
Mole of Na₂SO₄ = 0.09 mole
How to determine the mole of BaCl₂Volume of BaCl₂ = 200 mL = 200 / 1000 = 0.2 LMolarity of BaCl₂ = 0.4 MMole of BaCl₂ =?Mole = Molarity x Volume
Mole of BaCl₂ = 0.4 × 0.2
Mole of BaCl₂ = 0.08 mole
How to determine the limiting reactantBalanced equation
Na₂SO₄(aq) + BaCl₂(aq) —> BaSO₄(s) + 2NaCl(aq)
From the balanced equation above,
1 mole of BaCl₂ reacted with 1 mole of Na₂SO₄.
Therefore,
0.08 mole of BaCl₂ will also react with 0.08 mole of Na₂SO₄.
From the above illustration, we can see that only 0.08 mole of Na₂SO₄ out of 0.09 mole given is neede to react completely with 0.08 mole of BaCl₂.
Therefore, BaCl₂ is the limiting reactant
How to determine the mass of the precipitate (BaSO₄) formedBalanced equation
Na₂SO₄(aq) + BaCl₂(aq) —> BaSO₄(s) + 2NaCl(aq)
From the balanced equation above,
1 mole of BaCl₂ reacted to produce 1 mole of BaSO₄.
Therefore,
0.08 mole of BaCl₂ will also react to produce 0.08 mole of BaSO₄.
The mass of BaSO₄ can be obtained as follow
Mole of BaSO₄ = 0.08 mole Molar mass of BaSO₄ = 137 + 32 + (16×4) = 233 g/mol Mass of BaSO₄ =?Mass = mole × molar mass
Mass of BaSO₄ = 0.08 × 233
Mass of BaSO₄ = 18.64 g
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What are economic challenges that governments must face? check all that apply. threats of war unemployment low production inflation low voter turnout
Answers
The economic challenges that government must face are unemployment, low production, and inflation.
What are economic challenges?Economic challenges are problems related to the production of goods and services to satisfy unlimited wants.
Thus, the correct options are 2. Unemployment.
3. low production.
4. inflation.
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Answer:
B,C,D
Explanation:
took the test
Wind power was first used in the 1970s.
A. true
B. false
Answers
Answer:
B. false
Explanation:
Answer:
B (false)
Explanation:
Because, the earliest recorded evidence of wind energy being used dates to around 5000 BC in Egypt, where the sail was invented to catch the wind and propel boats along the River Nile
Water can act as both an acid and a base in an ionization reaction to form H') and OH ions.
What is this phenomenon called?
O self-ionization
O neutralization
O acid dissociation
O base dissociation
Answers
Answer:
neutralization
Explanation:
Water is a very interesting compound.It has tendency to both donate and accept a pair of electronsWhen it accepts it forms H_3O+ to be lewis acid.When it donates it forms OH- to be Lewis basehow to get the atomic mass of hydrogen
Answers
Answer:
the atomic mass is 1.00784 u
Explanation:
to calculate the atomic mass you add up the mass of protons and neutrons.
The lithosphere (crust) is broken into sections called ____, which float on top of the asthenosphere.
Answers
Answer: Tetonic plates
Explanation: just because
Suppose all the NO2 molecules were synthesized into N2O4. Given the equation 2NO2 ⇄ N2O4, how many moles of N2O4 would be produced? 2. 34 moles of N2O4
Answers
The moles of N₂O₄ would be produced by given moles of NO₂ is 1 mole.
What is stoichiometry?Stoichiometry of any reaction gives idea about the amount of species present before and after the completion of reaction.
Given chemical reaction is:
2NO₂ ⇄ N₂O₄
From the stoichiometry of the reaction it is clear that, 2 moles of nitrogen dioxide will produces 1 mole of N₂O₄.
Hence the produced moles of N₂O₄ is 1 mole.
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#SPJ1
help this is for my cousin lol
Answers
Answer:
For camouflage, to blend in with their surroundings.
Explanation:
The solid, golden brown fur coat of the lion acts as camouflage and helps it hide to catch its prey, in low-lying grasses of the African savanna.
In general, explain the difference between dietary fiber carbohydrates and sugar carbohydrates?
Answers
Answer:
Made up of glucose but passes through the body without being digested
Explanation:
Fiber: Made up of glucose but passes through the body without being digested. Sugar Alcohols: Not made up of glucose, therefore, they don’t directly affect blood glucose levels and are only partially digested. Although fiber is a carbohydrate, your body doesn’t digest it the same way.
How much heat energy is required to raise the temperature of 15g of silver from 25°C to 55°C, assuming the specific heat of silver
is 0. 24 J/gºC?
30
108
15 J
115 J
Answers
Answer:
108 j
Explanation:
.24 j/g-C * 15 g * (55-25) =
Which tool is used to measure an object’s mass?
A. Graduated cylinder
B. Meter stick
C. Digital thermometer
D. Electronic balance
Answers
How do I solve this?
Answers
Answer:
All of the answers are examples of combustion reactions
Explanation:
Carbon, hydrogen and oxygen are the main elements you want to look for in combustion, I think.
I need help with this ( look at the picture I put)
Answers
Answer:
12 H, 18 O, 6 C
Explanation:
[tex]6H_{2} O + 6CO_{2} -- > C_{6}H_{12} + 6O_{2}\\[/tex]
___________________
first, we'll fo the h on the first equation: [tex]6H_{2}[/tex]
multiply the 6 and 2 to get twelve.
in the second equation, we see that there is [tex]H_{12}[/tex]
so, in both there are 12 H.
__________________
Now we'll do O.
in the first equation we have [tex]6O + 6O_{2}[/tex]
so we have 6 + (6*2) or 6 + 12, which gives us 18
in the second equation we have [tex]O_{6} + 6O_{2}[/tex]
it's basically the same thing, just written differently, so we have 18.
__________________
Finally, C.
In the first equation, we have [tex]6C[/tex]
in the second [tex]C_{6}[/tex], again, same thing expressed differently.
both have 6 C.