Assume you have a solution with a ph = 5.0; what would be the new ph of that system if the h3o concentration is doubled (assuming kw = 1x10-14)?
Answers
The amount of acidity or basicity in an aqueous solution is determined by its pH. The concentration of hydrogen ions in the solution can be used to calculate and determine the pH of an aqueous solution.
An aqueous solution's pH is determined using the pH scale, which commonly refers to water and ranges from 0 to 14. (although as discussed below this is not an a formal rule). The pH scale classifies 7 as neutral. A pH value lower than 7 is regarded as acidic. The term "basic" then refers to a pH value greater than 7. High hydronium concentrations and low hydroxide concentrations are characteristics of acidic solutions. High hydroxide concentrations and low hydronium concentrations characterize basic solutions.
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Related Questions
Each item below belongs either with the population of disk stars or the population of halo stars of the Milky Way Galaxy. Match each item to the appropriate population.
Answers
Disk population: young stars, star-forming regions, older metal-rich stars, thick disk stars. Halo population: globular clusters, low-metallicity stars.
The population of disk stars and the population of halo stars are two distinct populations found in the Milky Way Galaxy. Each item listed can be matched to the appropriate population based on specific characteristics and properties.
Young stars and star-forming regions: These are primarily found in the disk population of the Milky Way. The disk is the flattened component of the galaxy where active star formation occurs.
Older, metal-rich stars: These are also predominantly found in the disk population. The disk contains stars that have formed more recently and have had time to enrich in heavy elements like metals.
Globular clusters: These clusters of stars are typically associated with the halo population. The halo is a spherical region surrounding the galactic disk, consisting of older stars and globular clusters that formed early in the galaxy's history.
Low-metallicity stars: These stars are more commonly associated with the halo population. The halo is known to contain stars with lower metal content compared to the disk population.
Thick disk stars: These stars belong to the disk population, specifically the thick disk component. The thick disk consists of older and kinematically hotter stars that exhibit a thicker structure compared to the thin disk.
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A fully-loaded shipping container has a mass of 30,000 kg. If the container weighs 290 k N, what is the local acceleration of gravity, in m/s2
Answers
The local acceleration of gravity is approximately 9.67 m/s².
How to determine the local acceleration of gravity?We can use the formula:
Weight = mass * acceleration due to gravity
Given that the weight of the container is 290 kN and the mass is 30,000 kg, we can rearrange the formula to solve for the acceleration due to gravity:
Acceleration due to gravity = Weight / Mass
First, let's convert the weight from kilonewtons to newtons:
1 kilonewton = 1000 newtons
So, 290 kN = 290,000 N.
Now we can calculate the acceleration due to gravity
Acceleration due to gravity = 290,000 N / 30,000 kg
Acceleration due to gravity = 9.67 m/s²
So, the local acceleration of gravity is approximately 9.67 m/s².
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A solid disk is rotating about an axis with uniform angular velocity. Another disk (with the same moment of inertia about the rotation axis) is dropped on top of it, so that afterwards the two disks are rotating together at a new uniform angular velocity. How is the new angular velocity related to the old one?
Answers
The new angular velocity of the two disks is lower than the initial angular velocity of the first disk. This is because the moment of inertia of the combined system (the two disks) is higher than the moment of inertia of the first disk alone. When the second disk is added, the total moment of inertia increases, which means that more torque is required to maintain the same angular velocity.
However, since the system is still rotating with uniform angular velocity, the torque must remain constant. This means that the new angular velocity is lower in order to compensate for the increased moment of inertia. The exact relationship between the old and new angular velocities depends on the masses and radii of the disks, as well as the initial angular velocity of the first disk.
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There are seven fundamental quantities in physics. true or false
Answers
Answer:
True
Explanation:
mass, length, time, electric current, temperature, luminous intensity and amount of substance
50 POINTS!
Look at the HR diagram below with four stars labeled. The HR diagram is shown with absolute brightness on the vertical axis and surface temperature in degree Celsius on the horizontal axis. The dwarf stars are plotted along a slant from coordinates 30,000 and negative 3 to 10,000 and negative 4. The main sequence stars are plotted along a slant from coordinates 20,000 and negative 2 to 2,000 and negative 6. The giants are plotted horizontally from coordinates 5,000 and 2 to 2,000 and 3. The supergiants are plotted horizontally from coordinates 7,500 and 4 to 2,500 and 4. Four stars are plotted: A is at 20,000, negative 4, B is at 2,500, negative 4, C is at 5,000, 2, and D is at 6,000, 4. Which statement is correct about Star A and Star C? They have the same color because they are neighboring stars. They have the same brightness because they are neighboring stars. They have different colors because they have different temperatures. They have different brightness because they are the same size.
Answers
The correct statement is that "They have different colors because they have different temperatures."
What are supergiant stars?
The most massive and brightest stars are known as supergiants. Supergiant stars range in temperature from roughly 3,400 kelvin to over 20,000 kelvin, whereas their absolute visual magnitudes range from 3 to 8.
In light of this, we may say that supermassive stars are a particular form of a star with an absolute brightness of about 3 and a surface temperature of about 20,000 °C.
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5. A cougar with a mass of 80 kg is standing at the edge of a cliff. Find the cougar’s potential energy if the cliff is 70 m high.
Answers
Answer:
54880
Explanation:
A child kicks a ball horizontally with a speed of 4.8 m/s off a deck 3.5 m off the
ground. How long will it take, in seconds, for the ball to hit the ground?
Answers
Answer:
0.73 sExplanation:
The time taken can be found by using the formula
\( t = \frac{d}{v} \\ \)
d is the distance
v is the velocity
From the question we have
\(t = \frac{3.5}{4.8} \\ = 0.72916...\)
We have the final answer as
0.73 sHope this helps you
Which correctly lists the types of matter, in terms of their atoms, in order from least tightly packed to most tightly packed?.
Answers
The many ways in which the particles of the phases are arranged are called states of matter. Gas, liquid, and solid are the three types of matter, from least to most densely packed.
In contrast to solids or liquids, the atoms are much more widely spaced out, and they randomly collide with one another. Any container can be filled with a gas, but the gas will escape if the container is not sealed.Solids have the largest density of the three natural states of matter. This is caused by how tightly and closely atoms are packed.Due to the fact that gas particles are already far apart and have more freedom to move, gases expand more when heated than solids do.
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Answer:
the answer is gas , liquid ,solid
Explanation
common since
Which symbol represents a type of radiation that has the same mass as an
electron and a positive charge?
Answers
Answer:β^+
Explanation: it is beta + , also positron emission radiation
Answer:
0 +1 e or β+
Explanation:
A P E X
Which statement about a Ferris wheel is true?
a The input force is applied to the axle.
b The input force is less than the output force.
с The output distance is shorter than the input
distance.
Answers
Answer:the imput force is applied to the axle
Explanation:
I need help with this I’am over here struggling halppp
Answers
Answer:
I think the answer to num.1 is A and the answer to num.2 is A also
Answer:
i think is
1. A
2. C
espero que salgas bien
Question 64 Marks: 1 A well casing should be equipped with a vent and installedChoose one answer. a. with a sampling tap b. in a pit to prevent freezing c. with a turbine type pump d. with concrete used as grout
Answers
A well casing during the formation of the borehole should be equipped with a vent and installed sampling tap. Option A is the correct answer.
A well casing is a vertical pipe or tubing that extends from the ground surface down into the well borehole. It is designed to provide structural support to the well and prevent the borehole from collapsing.
A well casing should be equipped with a vent to allow air to escape during the installation process and to prevent a vacuum from forming inside the casing.
A sampling tap may also be installed to allow for periodic water quality testing.
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A bar magnet has no markings to indicate it’spoles. How would you find out near which end is it’s north pole located?
Answers
Answer:
We can find out a direction by freely suspending a bar magnet. We will find that freely suspended bar magnet always comes to reset in a North- South direction.
Explanation:
Find the kinetic energy of a ball of mass 200 grams moving at a speed of 20 m/s.
Answers
Answer:
40KJ
Explanation:
m=200g
V=20m/s
Ek=?
Ek=(m*V²)/2
Ek=(200*20²)/2
Ek=(200*400)/2
Ek=80 000/2
Ek=40 000 J =40KJ
Sam makes six star-shaped cookies out of dough. He puts all of the cookies on a balance and measures the total weight as 36 grams. He then squeezes the cookies into one big ball and measures the weight. What is the weight of the entire ball?
Answers
Answer:
The answer is "36 grams".
Explanation:
In this question, the weight of the ball is not mentioned but is the weight of the cookies is declared, which is equal to 36 grams, and all the cookies are squeezes into the ball and after that, it calculates the overall weight so, let assume that ball weight is =0 and then the overall weight is:
\(=\text{weight of ball + cookies weight}\\\\=0+36 \ grams \\\\=36 \ grams\)
What is the change of entropy of water (lf = 0. 333 mj/kg, lv = 2. 26 mj/kg) when 450 grams of water
Answers
The change of entropy of water when 450 grams of water is boiled is 0.01017 J/K.
To calculate the change in entropy of water, we need to use the formula ΔS = Q/T, where ΔS is the change in entropy, Q is the heat added or removed, and T is the temperature at which the heat is added or removed. The values of latent heat of fusion (lf) and latent heat of vaporization (lv) are given as 0.333 MJ/kg and 2.26 MJ/kg respectively.
Therefore, we can use the following formula to calculate the change of entropy of water:ΔS = (mlf + mlv)/Twhere m is the mass of the substance and T is the temperature at which the phase change occurs. Here, the mass of water is given as 450 grams or 0.45 kg.
There is no change in temperature mentioned in the problem, so we assume that the water is either melting or boiling. If water is boiling, it is changing from liquid to gas, so we use the value of lv. If water is melting, it is changing from solid to liquid, so we use the value of lf. Let us assume that water is boiling. Then the change of entropy of water is given by: ΔS = (0.45 kg)(2.26 MJ/kg)/100 C= 0.01017 J/K
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2Objects 1 and 2 attract each other with a electrostatic force of 18.0 units. If the charge of Object 1 is one-fourth the original value AND the charge of object 2 is tripled AND the distance separating Objects 1 and 2 is halved, then the new electrostatic force will be _____ units.
Answers
Answer:
The new force becomes 3 times of the initial force.
Explanation:
Let q₁ and q₂ are two charged particles. The force between them is given by :
\(F=\dfrac{kq_1q_2}{r^2}\ ......(1)\)
If \(q_1'=\dfrac{q_1}{4}\)
and
\(q_2'=3q_2\)
Also, r' = r/2
New force,
\(F'=\dfrac{kq_1'q_2'}{r'^2}\)
Putting all the above values,
\(F'=\dfrac{k\dfrac{q_1}{4}3q_2}{(r/2)^2}\\\\F'=3\times \dfrac{kq_1q_2}{r^2}\\\\F'=3F\)
So, the new force becomes 3 times of the initial force.
specific heat capicity of water is 4200Jkg-1 C-1 . what its meaning .
Answers
The specific heat capacity of water is 4,200 Joules per kilogram per degree Celsius (J/kg°C). This means that it takes 4,200 J to raise the temperature of 1 kg of water by 1°C. Lead will warm up and cool down faster because it doesn't take much energy to change its temperature.
I need help with this question someone
Answers
The properties of group 18 elements, also referred to as noble gases or group 8 elements.
Eight valence electrons make them up.
They have enough electrons in their octet, therefore they don't need any more (stable).
are steady
Noble gases are those that are not reactive.
Why do elements desire to create ions?In order to gain or lose valence electrons to the element they interact with, elements create ions. They acquire a whole octet as a result. You might be wondering what a whole octet is. When an element contains all 8 valence electrons and is stable, it is said to have an octet, rendering it nonreactive.
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As the phase difference between two interfering waves changes from 180° to 0°, the amplitude of the resultant wave
A) Decreases
B) Increases
C) Remains the same
Answers
Answer:
decrease
Explanation:
because it’s going to 180 meaning it’s becoming equal to the other and they cancel out
When variable frequency speed control is used on a motor with a nameplate rating of 480v at 60 hz the voltage-to frequency ratio is?
Answers
The voltage-to-frequency ratio is 8 when using variable frequency speed control on a motor with a nameplate rating of 480v at 60 hz.
Variable frequency: What does that mean?A drive that alters the frequency of the current going to a non-servo AC motor to change the motor's speed but not its precise location.
How does variable frequency control work?The Frequency Can Change An induction motor's speed can be managed by the application of control. By adjusting the supply frequency, the motor speed and synchronous speed can both be managed.
Variable speeds – what are they?A variable speed limit is a flexible restriction on how fast drivers are allowed to travel along a certain section of road. Depending on the environment and the state of the roads, the posted speed limit fluctuates.
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A horizontal wire of length 0.19 m, carrying a current of 7.6 A, is placed in a uniform external magnetic field. When the wire is horizontal, it experiences no magnetic force. When the wire is tilted upward at an angle of 17°, it experiences a magnetic force of 6.2 x 10-³ N. Determine the magnitude of the external magnetic field.
Answers
The magnitude of the external magnetic field is approximately 0.194 Tesla.
To solve this problem, we can use the equation for the magnetic force on a current-carrying wire:
F = BILsinθ
where F is the magnetic force, B is the magnitude of the magnetic field, I is the current, L is the length of the wire, and θ is the angle between the wire and the magnetic field.
Given:
Length of the wire, L = 0.19 m
Current, I = 7.6 A
Angle, θ = 17°
Force, F = 6.2 x \(10^{-3}\)N
Substituting the given values into the equation, we have:
6.2 x \(10^{-3}\) N = B * 0.19 m * 7.6 A * sin(17°)
Simplifying the equation, we can solve for B:
B = (6.2 x \(10^{-3}\) N) / (0.19 m * 7.6 A * sin(17°))
Calculating this expression, we find:
B ≈ 0.194 T
Therefore, the magnitude of the external magnetic field is approximately 0.194 Tesla.
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This book has three symmetry axes through its center, all
mutually perpendicular. The book’s moment of inertia
would be smallest about which of the three? Explain
Answers
The moment of inertia would be the smallest about the axis of rotational symmetry.
The moment of inertia is a measure of an object's resistance to rotational motion. It depends on the object's mass distribution and the axis of rotation. The moment of inertia is a scalar quantity that is usually denoted by the symbol I.
For a book with three symmetry axes through its center that are all mutually perpendicular, the moment of inertia would be smallest about the axis of rotational symmetry. This is because the moment of inertia is proportional to the distance of the mass from the axis of rotation. Since the axis of rotational symmetry is the axis about which the mass is most evenly distributed, the moment of inertia will be smallest about this axis. Therefore, the axis of rotational symmetry is the axis about which the book's moment of inertia would be smallest.
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A plane has a takeoff speed of 34 m/s. What acceleration is needed for it to effectively use a 275 m runway?
Answers
Answer: the acceleration needed will be 2.1 m/s²
8. A hiker walks 2.3 km east and then 4.1 km north. What is her displacement?
A. 6.4 km
B. 6.4 km at 45°
C. 4.7 km at 61°
D. 4.7 km at 29°
Answers
to find the distance , use Pythagoras theorem.
let the displacement = c
c ^ 2 = 2.3 ^ 2 + 4.1 ^ 2
c = 4.7 km
then , you need to find the angle.
tan theta = 4.1 / 2.3
theta = 61 degree
i am sorry if my answer was wrong but i hope it helps you and you can understand it : )
What’s the kinetic energy of the object? Use KE=1/2mv2
Erica is competing in the shot put even at a track meet.she hurls a shot with a mass of 4 kilograms at a speed of 9 meters/second. The shots Kinetic energy is __ joules.
Answers
We may determine the shot's kinetic energy using the kinetic energy formula. The shot put has a kinetic energy of 162 joules.
How do you determine an object's kinetic energy?We may get the kinetic energy of the shot put by using the equation KE = 1/2mv², where m is the object's mass and v is its velocity:
KE equals 1/2 * 4 kg * (9 m/s)².
KE = 1/(4 kg x 81 m²/s²)
KE equals 162 joules
The shot put has a kinetic energy of 162 joules.
Simply put, what is kinetic energy?Kinetic energy, which may be seen in the movement of an item or subatomic particle, is the energy of motion. Kinetic energy is present in every particle and moving object.
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A diagnostic x-ray machine emits photons with maximum frequency of 1.03 x1019 Hz. The maximum photon energy is _____ keV.
Answers
The correct answer is 30 keV.
hf=(1.60×10−19C)(50.0×103V)
What is a x-ray machine ?Any device that uses X-rays is referred to as an X-ray machine. An X-ray generator and an X-ray detector might be part of it.
Examples comprise:
medical projection radiography equipmentcomputed tomography equipmentAirport security uses backscatter X-ray devices as "body scanners."In X-ray astronomy, detectorslearn more about x-ray machine refer:
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One roofer can put a new roof on a house three times faster than another. Working together they can roof a house in 5 days. How long would it take the faster roofer working alone?
Answers
Answer:
if A = 3 B A is 3 times faster than B
B + 3 B = 4 B speed of two working together
S = 4 B *5 = 20 B time to complete roof
It would take B 20 days to complete the roof
A = 20 / 3 = 6.67 days
Check:
B completes 1/20 roof / day
A completes 3/20 roof / day
Together they complete 4/20 or 1/5 roofs / day
Shelby did 4 laps in a 500 m pool. What is her total distance?
Displacement?
Answers
Answer:
With no water displacement it's 2000m.
Explanation:
400 × 500
4 × 5
Add the zeros
Answer:
The answer is 2000m
Explanation:
I hope it helps
20. Q: How long will it take for an apple falling from a 29.4m-tall tree to hit the ground?
A: 1.56 s
B: 2.04 s
C: 2.45 s
D: 3.72 s
Answers
Answer:
2.45s
Explanation:
is explanation needed too?