Answer:
It looks like you have some writing to do ,(-:
Explanation:
2. A student tested the pH of an unknown solution and the reading
was 13.5. Which statement is true?
A. The solution is a strong base.
B. The solution is a strong acid.
C. The solution is a weak base.
D. The solution is a weak acid.
Since the pH of this unknown solution is equal to 13.5, the true statement is that: A. the solution is a strong base.
What is pH?pH is simply an abbreviation for the power of hydrogen ions and it can be defined as a measure of the molar concentration of hydrogen ions in a particular solution.
This ultimately implies that, a pH can be used to measure and specify the acidity, neutrality or basicity (alkalinity) of any chemical solution.
On a pH scale, a chemical solution with a pH of 7 is said to be neutral, a chemical solution with a pH below 7 is acidic and it's basic (alkaline) when it's pH is above 7.
In conclusion, we can infer and logically deduce that this solution is a strong base because its pH is equal to 13.5.
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If there are 20 waves in a 5-second time frame, what is the frequency?
If there are 20 waves in a 5-second time frame, the frequency of the wave is 4 Hz.
What are wave and wavelength?A wave is a disturbance that travels through space, carrying energy without transporting matter. Waves can take many forms, such as water waves, sound waves, light waves, and radio waves. In general, waves are characterized by their frequency, wavelength, amplitude, and velocity.
Wavelength is one of the fundamental characteristics of a wave. It is defined as the distance between two consecutive points in a wave that are in phase, that is, they are at the same point in their cycle. For example, in a simple sine wave, the wavelength is the distance between two consecutive peaks or two consecutive troughs.
The symbol used to represent wavelength is the Greek letter lambda (λ). Wavelength is typically measured in meters (m) or some other unit of length. In general, longer wavelengths are associated with lower frequencies and lower energies, while shorter wavelengths are associated with higher frequencies and higher energies.
The relationship between wavelength, frequency, and velocity is given by the formula:
velocity = frequency x wavelength
This formula shows that as the frequency of a wave increases, its wavelength decreases, and vice versa, assuming the velocity remains constant. Similarly, as the wavelength of a wave increases, its frequency decreases, and vice versa, assuming the velocity remains constant.
So, a wave is a disturbance that travels through space carrying energy without transporting matter, while wavelength is the distance between two consecutive points in a wave that are in phase.
Here in the question,
The frequency of a wave is defined as the number of cycles or oscillations that occur in one second. The unit of frequency is hertz (Hz). To calculate the frequency of a wave, we can use the following formula:
Frequency = Number of cycles / Time
In this case, we are given that there are 20 waves in a 5-second time frame. Therefore, the number of cycles is 20, and the time is 5 seconds. Substituting these values into the formula, we get:
Frequency = 20 / 5 = 4 Hz
Therefore, the frequency of the wave is 4 Hz. This means that the wave completes 4 cycles or oscillations in one second.
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Say you’re someone who’s skeptical about climate change and want to challenge the results of the studies in the video. What would you want to know more about? List some of the questions you would ask.
How do we know human activity has a stronger effect than natural forces on climate change?
What human behaviors and natural forces were evaluated in the study? Are there others to consider?
What greenhouse gases are represented in the different lines on the graph?
Were greenhouse gases from natural sources taken into account?
exact answer switch it up edmentum
How do we know human activity has a stronger effect than natural forces on climate change? What human behaviors and natural forces were evaluated in the study?
What is Climate change?Long-term changes in temperature and weather patterns are referred to as climate change. These changes could be caused by natural processes, such oscillations in the solar cycle.
Fossil fuel combustion produces greenhouse gas emissions that serve as a blanket around the planet, trapping heat from the sun and increasing temperatures.
Carbon dioxide and methane are two examples of greenhouse gas emissions that are contributing to climate change. These are produced, for instance, while burning coal or gasoline to heat a building.
Therefore, How do we know human activity has a stronger effect than natural forces on climate change? What human behaviors and natural forces were evaluated in the study?
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purpose of the Golgi complex.
Answer:
A Golgi body, also known as a Golgi apparatus, is a cell organelle that helps process and package proteins and lipid molecules, especially proteins destined to be exported from the cell. Named after its discoverer, Camillo Golgi, the Golgi body appears as a series of stacked membranes.
i searched it up 4 u
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Felipe believes that whenever the Moon is in the position that is shown from above (top view) in Diagram A, the Moon always looks completely bright in the view from Earth, as shown in Diagram B.
Is Felipe correct? If he is correct, explain why the Moon always looks bright from Earth in that position, and explain how he should show light on the Moon in Diagram A. If he is incorrect, explain how else the Moon can look when it is in that position.
The moon is the earth's closest natural satellite, the moon changes its pattern and position from time to time.
Felipe is not correct, but maybe partly correct as when the earth falls in a straight line between the sun and the moon. The sunlight's blocked and the moon appears dark. Thus he is not correct as the moon is illuminated by the light coming from the sun and hence moon cannot look bright as compared to the moon shown in diagram B.Hence Felipe is incorrect.
Learn more about the position of the moon shown in the image A and B is correct or wrong according to felip.
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An atom has a _____ charge.
positive
negative
neutral
unlike mechanical weathering, what does chemical weathering change about a rock?
A: It's composition
B: It's shape
C: It's size
D: It's height
Answer:
A!! The chemical weathering changes all of these, But The answer is its Composition
Explanation:
A
PLS HELP
Determine the quantity of work done when a crane lifts a 200-N block from 2 m above the ground to 6 m above the ground.
Hi! Can you guys help me on my Re-do test I don’t want to fail. Ten points plus Brainliest if all are correct. Thanks!
WARNING !!! i don’t know for sure but i tried my best.
1. False
2. True
3. Yes
4. Yes
5. Yes
Identify two structural characteristics specific to muscle tissue.
Answer:
Explanation:
Muscle cells are excitable; they respond to a stimulus.meaning they can shorten and generate a pulling force. When attached between two movable objects, such as two bones, contraction of the muscles cause the bones to move.It contains protein fibers which contract to make the cell shorter.
Answer:
excitability.
contractility
Explanation:
Help me! ASAP please need this quick ahhhhh
Answer:
A force applied at an angle to the direction of motion of an object can cause it to change direction.
Ex: A side wind will cause an airplane to change its direction. It is possible that the object keeps going at the same speed if the force is applied perpendicular to the direction of motion. But the velocity of the object changes.
Can something move horizontally and vertically at the same time? Yes! Why? No! Why not?
Answer:
yes
Explanation:
THE VERTICAL & HORIZONTAL MOTIONS ARE INDEPENDENT. THE HORIZONTAL VELOCITY DOES NOT AFFECT THE VERTICAL MOTION.
Answer:
yes they can
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Why are 75% of Earth's volcanoes in the Pacific Ring of Fire?
Answer:
these volcanoes are caused by the abundance of convergent plate boundaries around the Pacific, so D.
Explanation:
Answer:
C There are alot of subduction zones in the ring of fire
Explanation:
An element can be identified by _____.
the number of its isotopes
the number of protons in its atom
its mass number
the number of neutrons in its atom
Answer:
The answer is the number of protons in its atom
Explanation:
Help asap and i will friend you and massage you and more I will do as u ask but PLEASE HELP ME PLEASE IM TRYING TO PASS THIS MARKING PERIOD
Answer:
1. They are all used to grab objects.
2. The human doesn't use them to move, the dog uses them to dig, the chicken uses them to scratch, and the crocodile uses them to swim.
3. Humans use them to hold tools and the other three use them to move.
Can you guys help me asap?
I'll give brainliest!!!
(PLEASE DON'T ANSWER JUST FOR POINTS)
Answer/Explanation:
1. Force / a. 6 Newtons
2. Mass / c. 125 kilograms
3. Acceleration / d. 3 m/s^2
4. Speed / b. 29 m/s
5. Velocity / e. 29 m/s East
6. Distance / f. 228 meters
Hope this helps!
Answer:
1. A) 6 Newtons
2. C) 125 kilograms
3. D) 3 m/s^2
4. B) 29 m/s
5. E) 29 m/s East
6. F) 228 meters
What happens to the volume and temperature of a liquid and gas when they are placed under pressure in a sealed container? Explain.
The pressure law states that for a constant volume of gas in a sealed container the temperature of the gas is directly proportional to its pressure. This can be easily understood by visualising the particles of gas in the container moving with a greater energy when the temperature is increased.
Hope this helped
The temperature an volume of liquids and gases are dependent upon the pressure of the substance. When liquid and gas particles are placed in a high pressure container then they change their medium from liquid to solid and from gas to liquid.
What is the effect of pressure on gas and liquids?
The pressure law states that for a given constant volume of gas in a sealed container the temperature of the gas in the container is directly proportional to the pressure of the gas. This can be easily understood through visualizing the particles of a gas in the container which is moving with a greater energy when the temperature is increased in the container.
Thus, when the pressure is applied on gas particles, it compresses to liquid and when the pressure is increased on liquid material, it becomes solid. The effect of pressure on solid is negligible as it does not change anything in solid. Thus, if the pressure is applied to a substance its state changes from Gas → Liquid → Solid.
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1.Which of the following is evidence that the Earth is round?
A. Neve's example with his magazine and apple.
B. A ship slowly appears on the horizon as it approaches
C. Earth's oceans are very deep
D. Both A and C
2. The Northern and Southern Hemispheres always have opposite seasons
A. true
B. false
Answer:
1\D. Both A and C
2\A true
What prediction did Mendeleev make that came true less than 20 years later?
A. He predicted the atomic numbers of unknown elements.
B. He said that three new elements would be discovered.
C, He predicted that a total of 112 elements would be discovered.
D. He said that the periodic table would be developed into 18 families.
Answer:
the answer is option B
Explanation:
Answer: He said that three new elements would be discovered.
Usa test prep- Look at the picture below to answer. If u answer correctly i will mark you as brainliest!
Answer:
A
Explanation:
The greatest concentration of atomic mass is in the nucleus because it is made up of protons and neutrons. The electrons surrounding the nucleus don't have as much mass as protons or neutrons.
Hopefully this helps...
What causes a earthquake
Answer:
A lot of things cause earthquakes and all of the boundaries have a play
Explanation:
Tectonic Movements: The disturbances inside the earth are called tectonic movements. ...
Volcanic Eruptions: The volcanic eruptions are often very violent and cause vibrations in the earth crust. ...
Other Reasons: The roofs of underground caves sometimes give way and release great force to cause minor tremors in the earth crust. ...
Answer: An earthquake is caused by a sudden slip on a fault. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.
Explanation:
Please only answer if you are positive. Thanks! Brainliest if correct!
Answer:
They create a Mountain Peak
Explanation:
Answer the assignment questions using the World Geology map in this lesson and/or the earth's lithospheric plates map in the assignment document. You can also do an Internet keyword search for U.S. Geological Survey Plates of the Earth Map to find some really good images that can be used as a reference for this assignment.
1. Wegener formed the theory of continental drift in 1912. What prevented research of the ocean floor, paleomagnetism, and earthquakes at that time?
2. If many different observations can all be explained by the same theory, does that make the theory true? Does it make the theory more likely? Explain your answer.
3. What evidence is there to suggest that the Earth is composed of tectonic plates?
4. What evidence is there to suggest that tectonic plates move?
5. Select Topography and Major Plates on the World Geology map. Describe the topography at the boundaries between the following pairs of plates: South American and Nazca, Indian and Eurasian, and Pacific and North American.
6. Observe the border between the Indian plate and the Somali plate. Do you see the same landforms as at the boundary between the Indian plate and the Eurasian plate? Explain.
7. Select Earthquakes and Major Plates on the World Geology map and observe earthquake activity around the South American plate. Based on your observations, what can you conclude about lithospheric motion of the South American plate with the Nazca plate and the African plate? Explain your answer.
8. How certain do you feel that the theory of plate tectonics is correct? What evidence would you use to support your opinion?
What needs to happen before the water in a pot begins to gain thermal energy?
Answer:
The heat needs to reach the pot so the water can boil?
Explanation:
Answer:
Through conduction.
Explanation:
Conduction is energy transferred through direct contact. There are two conduction processes going on here. First is the heat from the stove or whatever is the heat source going into the pot. Then it is the heat from the pot going into the water causing it to boil
Roberto and Genevieve are trying to separate a mixture of beads using a sifter. The chart below shows the colors and sizes of the beads. What size must the holes in the sifter be to separate the red and blue beads from the yellow beads?
Answer:
2.5 mm
Explanation:
It's just big enough for red and blue to fall through but small enough that yellow will stay in
Answer:b
Explanation:
Because it look like it
The DART system is used to detect tsunamis. What role do satellites play in the DART system? Please help and explain, I don't understand.
Which of the following statement is true?
a.Energy lost is destroyed
b.Energy lost transforms to heat energy
c.Energy is never wasted
d.Energy unused is recycled in the atmosphere.
Please help! Only if u r positive!
Answer:
sedimentary; melting
Hope this helps :)
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Based on this excerpt, summarize the job of mitochondria.
Excerpt: "About the size of pickup trucks from where you're floating, the organelles called mitochondria convert energy from your food into adenosine triphosphate, or ATP, to power biochemical reactions. A typical cell burns through 1 billion molecules of ATP every 1 to 2 minutes."
Answer:
The mitochondria is the powerhouse of the cell!
Explanation:
Ive just memorized this from science last year so I’m very sure, but here’s an explanation:
the excerpt claims “the organelles called mitochondria convert energy from your food into adenosine triphosphate, or ATP, to POWER biochemical reactions. A typical cell burns through 1 billion molecules of ATP every 1 to 2 minutes." Right there in the text, it says the mitochondria uses energy to make into ATP to POWER the cell and biochemical reactions. So there you go! :]
Answer:
what she said
Explanation:
HELP ME ASAP!!!!! This is 7th grade science! Will give brainliest, five starts, and a heart!
Choices:
o produces urine
o carries urine to the bladder
o stores urine temporarily
o excretes urine out of the body
Answer:
A- Carries urine to the bladder
B- excretes urine out of the body
C- Stores urine temporarily
D- Produces urine