Answer:
But its motion is not changing. This is because the forces acting on it from opposite sides are exactly the same size. An unbalanced force can change an object's motion. ... An unbalanced force acting on a moving object could make the object change direction, change speed, or stop moving.
The unbalanced forces are unequal in magnitude. They change the state of motion of the object. The pushing or pulling of an object can generate unbalanced forces and cause change in the direction, and position of an object.
What is an unbalanced force?The two forces of unequal magnitudes and they act on an object simultaneously such that the net force is not zero are defined as the unbalanced forces. The body acted upon by the unbalanced forces changes its state of motion.
The unbalanced forces are the opposite of a balanced force. An unbalanced force causes a change in motion, speed, direction, or movements. Because of unequal force or strength which is applied to one side of an object.
In the case of unbalanced forces, one side has more energy than the other. Opposite sides have forces acting against them.
Thus the unbalanced forces are out of balance and are not equal, it causes body's position to change.
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The specific heat of aluminum is 0.88 J/g°C. How many joules will it take to make the temperature of a 50. g nugget go up from 20.°C to 70.°C?
Answer:
2200J
Explanation:
Given parameters:
Specific heat of aluminum = 0.88J/g°C
Mass of nugget = 50g
Initial temperature = 20°C
Final temperature = 70°C
Unknown:
Quantity of heat required for the heating = ?
Solution:
To solve this problem, we use the expression below;
H = m c Δt
H is the quantity of heat
m is the mass
c is the specific heat capacity
Δt is the change in temperature
H = 50 x 0.88 x (70 - 20) = 2200J
A K+ ion is similar to a Cl– ion in that they both have the same A) nuclear charge B) number of electrons C) atomic number D) number of protons
Answer:
B) number of electrons
Explanation:
The two species:
K+ and Cl- have the same number of electrons.
A neutral atom of K has 19 electrons
A neutral atom of Cl has 17 electrons
Now,
To form K+, K will have to lose an electron and then the number of electrons becomes 18
To form Cl-, Cl will have to gain an electrons and then the number of electrons becomes 18
So, therefore, the number of electrons on both species is 18
Which product contains a strong base that would most likely completely dissolve in water?
drain cleaner
ammonia
baking soda
antacid
Answer:
Drain Cleaner
Explanation:
I just took the test and got it right :)
drain cleaner............................
What is another name for the galvanic cell?
O A. The voltaic cell
O B. The salt bridge
O C. The potential cell
O D. The redox cell
Answer:
The Voltaic Cell
Explanation:
Answer: A
Explanation: i just took the test :)
what does ǵene of interest¨ mean ?
What is the energy of a photon (J) that has a wavelength of 105 nm?
Answer:
E = 1.89×10⁻¹⁹ J
Explanation:
Given data:
Wavelength of photon = 105 nm (105 ×10⁻⁹ m)
Energy of photon = ?
Solution:
Formula:
E = hc/λ
h = plancks constant = 6.63×10⁻³⁴ Js
c = speed of wave = 3×10⁸ m/s
by putting values,
E = 6.63×10⁻³⁴ Js ×3×10⁸ m/s / 105 ×10⁻⁹ m
E = 19.89×10⁻²⁶ J.m / 105 ×10⁻⁹ m
E = 0.189×10⁻¹⁷ J
E = 1.89×10⁻¹⁹ J
disadvantages of Mendeleev's periodic table
Answer:
Various limitations of Mendeleev's periodic table are:-
Position of hydrogen - he couldn't assign a correct position to hydrogen as it showed properties of both alkali and halogens .
Position of isotopes - he considered that the properties of elements are a function of their atomic masses. Hence isotopes of a same element couldn't be placed.
In the d-block , elements with lower atomic number were placed before higher atomic number.
Explanation:
What is the difference between a plain and a plateau? A. Only a plain is flat, a plateau is steep mountainside. B. Both are flat, but a plateau is bordered by cliffs. C. A plain is rolling hills with cliffs, and a plateau is large flat area.
Answer:
B
Explanation:
Both plain and plateau have flat surfaces. However, a plain is located in a low-lying area while a plateau is located on an elevated area. In essence, a plateau can be viewed as an elevated plain or a plain that is bordered by cliffs.
The correct option is B.
What is an example of a congenital disorder
Answer:
down syndrome
Explanation:
What may be the most important tool to use for collecting data when conducting an investigation into how thermal energy affects metals? goggles beaker thermometer graduated cylinder
Answer:
thermometer
Explanation:
The most important tool to use when collecting data relating to how thermal energy affects metals would be the thermometer.
The thermometer is an instrument used to measure temperatures and the temperature of a body is a measure of the amount of thermal energy present in the body.
In order to obtain data relating to how thermal energy affects metals, the most important variable to take note of would be the thermal energy of the metals and this can only be done by the thermometer.
How many atoms are there in 1.225 moles of iron?
Show work
Answer:
1.2 × 10 to the power 25 . atoms of iron divide by a line 6.022× iron atoms per mole =~ 20 moles
Which of the following is considered the first receiver for the nicotine in a smoking person?
1.left atrium
2.right atrium
3.left ventricle
4.right ventricle
Answer:
i think right artrium but not full aure
Question 1
2 pts
The area around a charged object where the object can exert a force on
other charged objects is an electric
field
charge
induction
force
Answer:
A. electric field
Explanation:
took test
Answer:
electric field
Explanation:
10 points- plz help me..
A science class is at a frozen lake for a field trip, and they are experimenting with hockey pucks on the ice. A student says, "If I push harder on this hockey puck when I make it slide, then it will slide faster along the ice.”
What could the student add to make the statement a hypothesis?
A: dependent and independent variables
B: proof that the statement is true
C: examples of other objects on ice
D: explanations of why the puck slides faster
Answer:
the answer is D: explanations of why the puck slides faster
Explanation:
A Girl in Brainly Banned/Removed the answer i had put the first time, Brainly claims she removed my answer because i was violating community guidelines such as cheating or plagiarism. The reason for putting my answer was because i took a test, i got it right and i want other people to take a test and get the answer right. Im trying to help:).
so katie if your reading this, try next time to mind your own business
Answer:d
Explanation:
which best explains why estuaries are an important habit for many Marine organisms in comparison to the open ocean?
A) there is less food in the estuaries
B) there are more predators in estuaries
C) there is more salt available in estuaries
D) there are more nutrients available in estuaries
which best explains why estuaries are an important habit for many Marine organisms in comparison to the open ocean?
Answer:-there are more nutrients available in estuaries
Extra information:-Open ocean:-The Open ocean is also known as pelagic zone.It is the area of the ocean which is outside of coastal areas. The open ocean lies over the continental shelf. The seafloor is not included in the open ocean.HELP PLEASE ASAAPPP!!!How many atoms of silicon would there be in a sample that contained 4.66 x 1030
grams? ANSWER CHOICES INCLUDED IN IMAGE ABOVE
Answer:
there is no image
Explanation:
can you maybe ask the question again with the image?
Answer:
put an image please i don't understand
Part A:
Identify a property of water that contributes its movement through the capillary tubes. Explain how the
molecular structure of water contributes to this property.
Plants use a similar mechanism to move water through their stems. In a specific species of plant, the
vessels are approximately 0.3 mm in diameter.
Part B:
Estimate how tall this species of plant can grow. Explain how the molecular structure of the vessels can
be modified to increase the maximum height of the plant without changing the diameter of the vessels.
Answer:
Part A
i) A property of water that contributes to its movement through capillary tubes is adhesion, which is the capacity of water to stick to other surfaces
ii) Water has a polar molecular structure as such the hydrogen present in the water molecules form bonds with the oxygen present in the silicon oxide molecules from which the capillary tube is normally made
Part B.
i) From the given graph, the function appears to have a vertical asymptote at x = 0, therefore, the plant can grow infinitely tall
ii) The molecular structure of the vessel can be modified such that the walls incorporate more oxygen molecules per mole which will increase the number and the strength of the hydrogen bond between the water molecules and the walls of the plant vessel and therefore, increase the capillary action, the water height and the maximum height of the tree
Explanation:
A. 1720 kJ
B. 125.6 kJ
C. 3440 kJ
D. 4730 kJ
Answer:
Q = 3440Kj
Explanation:
Given data:
Mass of gold = 2kg
Latent heat of vaporization = 1720 Kj/Kg
Energy required to vaporize 2kg gold = ?
Solution:
Equation
Q= mLvap
It is given that heat required to vaporize the one kilogram gold is 1720 Kj thus, for 2 kg
by putting values,
Q= 2kg × 1720 Kj/Kg
Q = 3440Kj
4. What gives blood its red color?
a. hemoglobin
O
b. red blood cells
O
c. platelets
d. plasma
Answer:
the best answer would be A
Explanation:
cause it contains a red colored compound.
Demonstrate that kgL^1 and gcm^3 are
equivalent units of density
1 kg = 1000g
1l = 1000cm3
therefor
kg/l = 1000g/1000cm3
cancel the zeros
kg/l = g/cm3 demonstrated
Warm air rising at the equator and cold air sinking at the poles is an example of…
Answer:
atmospheric circulation
Explanation:
Atmospheric circulation occurs because the Sun heats the Earth more at the equator than at the poles.
Warm air is known to rise at the tropics which lies closer to the equator and moves towards the poles. Atmospheric circulation is driven by the rotation of the earth.
The air cools and flows back towards the Equator to be warmed up again. A sort of convection current is thereby set up.
when 3.18 g of copper (||) oxide were carefully heated in a stream of dry hydrogen, 2.54 g of copper and 0.72 g of water were formed determine the number of moles of hydrogen atoms which combine with one mole of oxygen atoms
Answer:
the number of moles of atom is 0.91584
What is causing the shrinking of the taiga forest biome?
Answer:
Deforestation
Explanation:
The value of softwood means that large areas of Russia's taiga have been cleared: deforestation is occurring at a rate of 12 million hectares per year (2014). As much as half of the logging in the far east of Siberia is illegal
Answer:
deforestation
Explanation:
and tectonic plates
99% 1H
0.8% 2H
0.2% 3H
Average Atomic Mass = [answer] amu
PLEASE HELP ME
Answer: 1.01 atomic mass units or amu
Explanation:
Which statement is true of all chemical reactions? They can go in just one direction. They can go in just one direction. They occur only in science labs. They occur only in science labs. They break and reform bonds. They break and reform bonds. They create new elements.
Answer:
They break and reform bonds
Explanation:
Chemical reactions basically refer to the transformation of a substance (reactant) to another substance (products).
So we have;
Reactant --> Product
They can go in just one direction.
This option is wrong, because there are reversible reactions which can go in both directions. That is reactants reactants to form products and products react to form reactants.
They occur only in science labs.
This is wrong because chemical reactions occur in our day to day activities. An example is rusting.
They break and reform bonds.
This option is correct. There is breaking of bonds in the reactants and forming of new bonds in the products.
They create new elements
Atoms or elements are not created nor destroyed in chemical reactions so this option is wrong.
What is a radio wave?
Answer:
Radio waves are a type of electromagnetic radiation best-known for their use in communication technologies, such as television, mobile phones and radios.
i will give brainliest
Which statement best describes the direction of force shown by the magnetic
field lines around a bar magnet?
A. Away from both the magnet's north and south poles
B. Toward both the magnet's north and south poles
C. From the magnet's north pole to its south pole
D. From the magnet's south pole to its north pole
Answer:
I believe the amswer is a hope this helps
Answer:
c
Explanation:
hope you can redo it to get it right
1. Does elevation play a factor? If so, can the elevation be changed to protect the homes? 2. Could the residents build a structure that would prevent a tsunami from reaching the community? What would this structure look like? How would the residents build it? 3. What could limit the erosion of the beach?
Answer:
Yes.
Explanation:
Yes, elevation play a great role and has the ability to protect homes from natural disasters such as flood and tsunami etc. The residents build a hard structure of wall along the beach that would prevent a tsunami from reaching the community and also built homes at higher elevation. The residence built it with the help of government and this wall is also effective in reducing the erosion of the beach.
Answer:
1. Yes elevation does play a factor if the house was higher i feel like it wouldnt get as damaged
2. Yes they could build a high enough wall that it would take most of the impact away from the houses, you would build it with the thickest peice of wood that you could find and use long screws and cement the wood into the ground.
3. The wall will also help from erosion
Explanation: i got it right on my project.
What's the balanced equation for Iron and copper (II) sulfate solution.
Answer:
2Fe + 3CuSO₄ → Fe₂(SO₄)₃ + 3Cu
Explanation:
The reactants are:
Iron = Fe
Copper (II) sulfate solution = CuSO₄
The reaction is given as:
Fe + CuSO₄ → Fe₂(SO₄)₃ + Cu
This is a single displacement reaction;
Now let us balance the equation;
aFe + bCuSO₄ → cFe₂(SO₄)₃ + dCu
Conserving Fe;
a = 2c
Conserving Cu;
b = d
Conserving S;
b = 3c
Conserving O;
4b = 12c
let b = 1;
c = [tex]\frac{1}{3}[/tex]
d = 1
a = [tex]\frac{2}{3}[/tex]
Multiply through by 3 to get whole numbers;
a = 2, b = 3, c = 1 and d = 3
2Fe + 3CuSO₄ → Fe₂(SO₄)₃ + 3Cu
the law of states that mass cannot be created nor destroyed during a chemical reaction ?
a: conservation of mass
b: averages
c: conservation of momentum
d: conservation of energy