Answer:
A: Excess H+ is absorbed by bicarbonate ions.
Explanation:
1.Two materials that can be scratched by an iron mail are ___, ___
2.What is the substance that can be scratched by an iron nail but not a penny?
Please answer
Answer:
1. Two materials that can be scratched by an iron nail are zinc and aluminum
2. A substance that can be scratched by an iron nail but not a penny is;
Nickel
Explanation:
The hardness of a material can be defined as its ability to resist being plastically deformed at a location due to mechanical scratching, abrasion or indentation
The Mohs hardness scale provides a ranking of materials in the order of hardness with a material having a higher Mohs hardness number being able to scratch other materials which have a lower Mohs hardness number
1. From the Mohs scale of hardness, iron which has an harness number of 4.5 can scratch zinc which has an harness number of 2.5, and iron can also scratch aluminum which has an hardness number of 2.5 to 3
2. A penny is made from copper plated material and will have an outer layer hardness of copper which has an hardness number of 3 on the Mohs scale
Therefore, a penny cannot scratch a material mode of nickel which has an hardness number of 4, while iron which has an hardness of 4.5 will scratch a nickel material
(1) Zinc and aluminum can be scratched by an iron nail.
(2) Nickel can be scratched by an iron nail but not a penny.
Hardness and deformation:The hardness of a material is defined as its ability to resist deformation due to mechanical scratching, abrasion, or indentation.
According to the Mohs hardness scale, a material having a higher Mohs hardness number is able to scratch other materials which have a lower Mohs hardness number.
From the Mohs scale of hardness, iron has a hardness number of 4.5, zinc has a hardness number of 2.5, and aluminum which has a hardness number between 2.5 to 3. So, iron can scratch both, Zinc and Aluminium.
A penny is made from copper-plated material copper has a hardness number of 3 on the Mohs scale. Whereas Nickel has a hardness number of 4. Therefore, a penny cannot scratch a material made of Nickel.
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How is it that even light precipitation can still cause the collection of large amounts of water.
Answer:
the heat of the light.
Explanation:
no matter the light, there's always heat being produced from it. and heat makes liuqid rise
what energy source would be the most cost efficient and have the smallest impact on the climate? evidence?
Answer: Solar energy and wind energy both can be used
Explanation: Solar energy as well as wind energy would be the most preferable energy source for this community.
Solar energy is the energy that is directly derived from the sun and can be transformed into electrical energy. For example, the use of solar panels.
Wind energy is obtained by the natural agent known as wind. In the region where the wind is high, the turbines moves very fast, thereby generating electricity. For example, wind mill.
Thus this two energy sources are less costly and have lesser environmental impacts and they are very precise and is currently rising in the faster rate and with innovative technical upgradation.
Which of the following describes how cooling
systems transfer thermal energy?
a. Thermal energy naturally flows from cooler
areas to warmer areas.
b. Thermal energy naturally flows from warmer
areas to cooler areas.
c. Work is done to transfer thermal energy from
warmer areas to cooler areas.
d. Work is done to transfer thermal energy from
cooler areas to warmer areas.
The strength of the force of friction between two solids is affected by:
A. the phase of matter.
B. the lengths of the two surfaces.
C. the properties of the two surfaces.
D. the colors of the solids involved.
Answer:
option a
Explanation:
The phase of matter
maybe this might help u
Indicate the unit of measurement that scientists use for each of the following measurements:
Force:
Acceleration:
Velocity:
Mass:
Answer:
Force: Newtons (F = M a = kg * m /s^2)
Acceleration: m / sec^2 (a = meters / sec^2)
Velocity: m / sec (v = meters / sec)
Mass: kg (M = kilograms)
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (40pts)
friction make non moving objects starts to move
truethere are different types of force which may help them to move
An airplane flies with a constant speed of 620 miles per hour. How far can it travel
in 1/2 hour?
Answer:
310 miles
Explanation:
If an airplane can travel 620 miles in one hour, then to find how far it traveled in half of an hour, divide 620 by 2 (or multiply by 1/2).
620/2= 310 miles in 1/2 of an hour
What can you tell a flat earth believer
Answer:
that the earth isnt flat
Explanation:
The speed of an object in motion will _____ if the net force acting on it is opposite the direction that the object is moving.
Answer:
Decrease
Explanation:
how is a mixture different from a compound
Answer:
Compounds are two or more elements chemically combined in definite proportions by weight.
Mixtures are two or more substances not chemically combined.
Explanation:
Hope this helped Mark BRAINLIEST!!!
Answer:
A mixture can be separated by physical means
Explanation:
A low-pressure sodium vapor lamp whose wavelength is 5.89 x 10−7 m passes through double-slits that are 2.0 x 10−4 m apart and produces an interference pattern whose fringes are 3.2 x 10−3 m apart on the screen. What is the distance to the screen?
3 meters
2.7 meters
1.6 meters
1.1 meters
Answer:
1.1 meter is the right answer
The distance between slit and screen is 1.1m
When the light from sodium vapor lamp passes through slits, it produces an interference pattern and we obtain a fringe pattern on the screen . With the help of this fringe pattern we can determine the fringe width.
What is a sodium vapor lamp?
It is a light source which produces a nearly monochromatic light (single wavelength) of yellow color having wavelength 5.59 x 10⁻⁷m.
What is interference?Interference is a phenomenon in redistribution of energy takes place when two or more waves having same wavelength , travelling in same direction, having a constant phase relationship , and having equal or almost equal amplitude superpose on each other.
What is a fringe patternAs a result of interference pattern of alternate bright and dark bands are seen on the screen. This is called fringe pattern and is caused due to constructive and destructive interference.
What is fringe width?
The distance between two consecutive bright fringes or dark fringes is called fringe width.
It is given by ,
β = λD/d
Where, β = fringe width
D = distance between screen and slit
d = distance between two slits
Given here,
Fringe width β = 3.2 x 10⁻³m
Distance between two slits d = 2.0 x 10⁻⁴m
wavelength λ = 5.89 x 10⁻⁷m
Since,
β = λD/d
So, D = β d/λ
D = (3.2 x 10⁻³m)(2.0 x 10⁻⁴m)/5.89 x 10⁻⁷m
So, D = 1.1 m
Hence the distance between screen and slit is 1.1 m
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Does this graph represent constant or changing speed? How do you know? Find the average speed
Can someone help me please?
What's the net fore and gravity
Answer:
Force = Mass x Acceleration. Since the acceleration of gravity is always constant at 9.81 m/s2, the force of gravity is constant as well, according to Newton. If the object is sitting motionless on the ground, then the net force (sum of all forces) acting on it is zero
Explanation:
sorry if it doesn't help
An airplane flies with a constant speed of 680 km/h. How far can it travel in
1 hour?
Which of the following characteristics are observed in an image formed by a pinhole camera?
Answer:
Pinhole Camera Image Characteristics
A real image is obtained as the image is obtained on the screen. The size of the image obtained is comparatively smaller than the actual object. The image is inverted on the x-axis as well as on the y-axis.
Explanation:
Hope it helps
6. Which of the following best describes the situation?
Answer:
D
Explanation:
the man is pull the box that is the force and the box rubbing against the ground causes friction
what is more reactive calcium or strontium?
Answer:
Calcium is less reactive than strontium.
hope it helps
Which is not a step in the scientific method?
a. Problem or question
b. Ask other people for their opinion
O c. Formulate a hypothesis
O d. Arrive At a conclusion
HURRY PLEASE
Answer:
Umm I'm pretty sure is all of the above
what substance is made of components that are not chemically bonded we call that?
they are right it's mixture
Answer quick!!! (Edge 2021)
Haley noticed a small spot on her skin that turned out to be skin cancer. Which treatment is her doctor most likely to use?
A) Brachytherapy
B) Superficial external beam radiation therapy
C) Radiopharmaceuticals
D) High Intensity Focused Ultrasounds
The treatment most likely to use is Superficial External bean Radiation Therapy. Then the correct option is B.
What is the electromagnetic spectrum?The electromagnetic spectrum consists of the range of all types of EM radiation. Radiation is a packet of energy that travels and spreads out.
It has radio waves, infrared waves, visible light waves, ultraviolet rays, and microwaves.
They possess high energy even to penetrate deep within the material. the electromagnetic spectrum has a longer wavelength and less frequency.
Haley noticed a small spot on her skin that turned out to be skin cancer.
Surgery, radiation, chemotherapy, and hormone therapy can all be used to relieve signs and symptoms.
Medications may relieve symptoms such as pain and shortness of breath. Palliative treatment can be used.
The treatment most likely to use is Superficial External bean Radiation Therapy.
Then the correct option is B.
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how to use a circuit breaker
?
Answer:
circuit breakers work in a similar way to fuses, and also protect the circuit from damage if too much current flows but work in a different way. when circuit breakers detect a surge in current in a circuit, they break the circuit by opening a switch. one type of circuit breaker used instead of a fuse and an earth wire is a Residual Current Circuit Breaker (RCCB)
Which state of matter would be described as having low energy, with particles that are fixed in place and their only motion is vibrating? *
1 point
A.Liquid
B.Gas
C.Plasma
D.Solid
What is happening to the water molecules as it changes from ice to liquid water? *
1 point
A.They are losing energy, can’t move only vibrate
B.They are gaining energy, can move and slide past each other
C.They are moving at high speeds and are far from each other
D.They are gaining energy, moving slowly until they evaporate
Which state of matter has the highest energy level and is composed of freely moving charged particles? *
1 point
A.Gas
B.Liquid
C.Plasma
D.Solid
Which model(s) best represents the kinetic energy and particle arrangement of a gas? *
1 point
Captionless Image
A.Diagram A
B.Diagram B
C.Diagram C
D.Diagrams B and C
Which state of matter has the highest energy level and is composed of freely moving charged particles? *
1 point
A.Gas
B.Liquid
C.Plasma
D.Solid
Use the Phase Change Diagram to answer questions 5-10
What phase change process is occurring at #2? *
1 point
A.Vaporization
B.Freezing
C.Melting
D.Condensation
What state of matter is represented by the letter A? *
1 point
A.Plasma
B.Liquid
C.Solid
D.Vapor
What phase change process is occurring at #3 and what is happening in terms of energy? *
2 points
A.Vaporization, energy is added
B.Vaporization, energy is removed
C.Condensation, energy added
D.Condensation, energy is removed
What state of matter is represented by the letter B and what phase change process is happening at #1? *
2 points
A.B is solid, and it is freezing as energy is removed
B.B is liquid, and it is evaporating as energy is removed
C.B is solid, and it is melting as energy is added
D.B is liquid, and it is freezing as energy is removed
What state of matter is represented by the letter C, and what would it change into if enough energy is added? *
1 point
A.Gas, it would change to vapor
B.Liquid, it would change to gas
C.Gas, it would change to plasma
D.Gas, it would change to liquid
What phase change process is occurring at #4? *
1 point
A.Condensation
B.Vaporization
C.Freezing
D.Melting
How does temperature affect the particle arrangement and state of matter of a substance? *
1 point
Captionless Image
A.As temperature increases the energy of particles increases and the substance changes from solid to liquid to gas
B.As temperature increases the energy of particles decreases and the substance changes from gas to liquid to solid
C.As temperature decreases the energy of particles increases and the substance changes from gas to liquid to solid
D.As temperature decreases the energy of particles decreases and the substance changes from solid to liquid to gas
What is the major difference between the solid, liquid, and gas phases of matter? *
2 points
Your answer
Submit
QUICK WILL GIVE BRAINLIEST EDG 2021
What is the best prediction for what will happen when all of the hydrogen in the sun has undergone fusion?
Helium nuclei will split to form hydrogen and the sun will no longer release energy.
Helium nuclei will split to form hydrogen and the sun will continue to release energy.
Helium nuclei will fuse to create heavier elements but the sun will no longer release energy.
Helium nuclei will fuse to crazy heavier elements and the sun will confuse to release energy.
Answer:
Helium nuclei will split to form hydrogen and the sun will no longer release energy.
Explanation:
:)
When all the hydrogen in the sun has gone for fusion, helium nuclei will split to form hydrogen and the sun will continue to release energy.
What is nuclear fusion?The term nuclear fusion has to do with the combination of two or more nuclei to obtain a larger nuclei with the emission of a tremendous amount of energy.
Hence, when all the hydrogen in the sun has gone for fusion, helium nuclei will split to form hydrogen and the sun will continue to release energy.
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True or False: A tree is an example of an object that contains chemical energy. help!! Please!! True False
Answer:
Is a tree an example of chemical energy?
Take, for example, an apple tree. The tree absorbs light energy from sunlight, converting the light energy into chemical potential energy stored in chemical bonds. The tree uses this energy to build leaves and branches and fruit. ... Then it takes that heat and converts it into motion, or kinetic energy
Explanation:
why do we use a circuit breaker ?
Answer:to protect an electrical circuit from damage caused by excess current from an overload or short circuit.
Explanation:
The Law of Conservation states that energy ____ be created of destroyed, but ___
Answer:
Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another.
Explanation:
hope this helps
A 15 kg dog sits at the top of a hill. If the dog possesses 600 J of potential energy,
what is the height of the hill?
Answer:
4.08m
Explanation:
h = PE/mg
h = 600/(15)(9.8)
h = 600/147
h = 4.08m
True or false.
a-
Magnetic force is a force acting from a
distance.