Which type of wave does the illustration depict?
a longitudinal wave
b surface wave
c transverse wave
Answers
Related Questions
Question 3 of 15
2 Points
The direction of a vector that points somewhere between due north and due
east is measured in
A. centimeters
B. degrees
C. hours
D. miles
Answers
Answer:
B) Degrees
Explanation:
The directions of the vectors are often defined in terms of due East, due North, due West and due South. A direction exactly in between of North and East can be described as Northeast, similarly we can describe directions in terms of Northwest, Southeast and South west.
From these, the direction of a vector can be easily expressed in degrees, which is measured counter clockwise about its tail from due East. Considering that we can say that East is at 0° , North is at 90° , West is at 180 and South is at 270° counter clockwise rotation from due East.
So, we know that the direction of a vector lying somewhere between due East i.e 0° and due North i.e 90°, will be measured in degrees, which will have a value between 0°-90°
(you can just say a color)
Answers
Answer:
I think its red
Explanation:
divide the distance 8000 by the hours 10 to get 800
Answer:
Red.
Explanation:
If you divide the distance by the time, you will discover that the airplane traveled 800 miles per hour.
Pls mark Brainliest with the crown.
Give an example of a negative slope.
Answers
Answer:
A negative slope is a downward slope that descends from left to right. It indicates that as the value of one variable increases, the value of the other variable decreases.
For example, the line y = -2x + 5 has a negative slope of -2. This means that as the value of x increases by 1, the value of y will decrease by 2. Graphically, this line will be a downward slope from left to right.
The transfer of energy by the movement of particles that are in contact with each other
#A Radiation
#B Convection
#C Conduction
#D Thermal energy
Answers
Answer: I belive that the Answer is C.) Conduction
Explanation:
Because it’s conduction because it’s the flow of energy
Help!!!!! will give brainlist
Answers
Answer:
The last one
Density=mass/volume
What two gases in the atmosphere do animals and plants need to breathe and grow?
Answers
Answer: Explanation:
Plants and animals each produce the gases that the other needs to live. Plants need carbon dioxide—people and other animals exhale carbon dioxide as a waste product. People and other animals need oxygen—plants produce oxygen during an important process called photosynthesis, which turns the sun's energy into nutrients.
What is a resistor?
A light bulb
A battery
A switch
Answers
Answer:
Switch
Explanation:
since when you flick the switch up its stops electricity
List three evidences that show that the Bible is the Word of God.
Answers
Answer:1.God tells us that He is the Author (2 Peter 1:20-21 Open in Logos Bible Software (if available) & 2 Timothy 3:15-17 Open in Logos Bible Software (if available))
1.The Old Testament and New Testament Authors understood they were writing the Word of God. Common Old Testament phrase – “Thus saith the Lord”. The Apostle Peter confirmed the Apostle Paul’s writings as Scripture (2 Peter 3:16)
3.Its Historical Accuracy – as verified by archeology, which has never contradicted the Bible, but only confirms and silences its critics.
Explanation:
Answer:
Many people question who the author of the Bible is and wonder if the Bible is really the Word of God. I want to give you five reasons to affirm that the Bible is God's Word.
The Word of God: Evidence that Scripture is Divine
First, I believe the Bible is the Word of God because of its scientific accuracy. The Truth of the Word of God tells us that God “hangeth the earth upon nothing” (Job 26:7). How did Job know that the earth hung in space before the age of modern astronomy and space travel? The Holy Spirit told him. The scientists of Isaiah’s day didn’t know the topography of the earth, but Isaiah said, “It is [God] that sitteth upon the circle of the earth” (Isaiah 40:22). The word for “circle” here means a globe or sphere. How did Isaiah know that God says upon the circle of the earth? By divine inspiration.
Secondly, the Bible is affirmed through historical accuracy. Do you remember the story about the handwriting on the wall that is found in the fifth chapter of Daniel? Belshazzar hosted a feast with a thousand of his lords and ladies. Suddenly, a gruesome hand appeared out of nowhere and began to write on a wall. The king was disturbed and asked for someone to interpret the writing. Daniel was found and gave the interpretation. After the interpretation, “Then commanded Belshazzar, and they clothed Daniel with scarlet, and put a chain of gold about his neck, and made a proclamation concerning him, that he should be the third ruler in the kingdom.” (Daniel 5:29). Basing their opinion on Babylonian records, the historians claim this never happened. According to the records, the last king of Babylon was not Belshazzar, but a man named Nabonidas. And so, they said, the Bible is in error. There wasn’t a record of a king named Belshazzar. Well, the spades of archeologists continued to do their work. In 1853, an inscription was found on a cornerstone of a temple built by Nabonidas, to the god Ur, which read: “May I, Nabonidas, king of Babylon, not sin against thee. And may reverence for thee dwell in the heart of Belshazzar, my first-born favorite son.” From other inscriptions, it was learned that Belshazzar and Nabonidas were co-regents. Nabonidas traveled while Belshazzar stayed home to run the kingdom. Now that we know that Belshazzar and Nabonidas were co-regents, it makes sense that Belshazzar would say that Daniel would be the third ruler. What a marvelous nugget of truth tucked away in the Word of God!
Explanation:
How to do a back spring
Answers
Answer:
You need to be flexible first
Have the confidence to jump backwards as far as you can and extend your arms and make sure you can touch the floor then you will be doing a handstand make sure to lean back and bend to make sure your feet touch the ground and there you did your back spring.
Hope this helped :)
Have a nice day
I got this from my sister.
hen catching a football, your fingers should shape a
a W
b M
c Triangle
d Open circle
PLEASE ANSWER ASAP
Answers
Answer:
c.triangle
Explanation:
this is because I played football in be and the teacher told up it should be a triangle
What would happen to the digestion process if enzymes were not present
Answers
Answer: It would take 2.3 billion years for the biological reaction without the presence of enzymes. It’s because, without them, your body can’t break down foods so that nutrients can be fully absorbed. Every organ, every tissue, and every 100 trillion cells in our body rely upon the reaction of metabolic enzymes and their energy component.
Explanation:
I hope this helps
Without enzymes, the body would not be able to break down complex carbohydrates, proteins, and fats into their component molecules. This means that these nutrients would not be absorbed by the body and would be excreted as waste.
Additionally, the lack of enzymes would make it difficult for the body to digest and absorb vitamins and minerals. This could lead to malnutrition and other health problems over time.
Overall, the absence of enzymes from the digestive process would severely impair the body's ability to extract nutrients from food and could have negative consequences for overall health and well-being.
1 sentence telling me the topic of the story. In your own words.
3 sentences you copy straight from the magazine with "quotation" marks around it. This sentence proves that the topic is what you stated in the first sentence.
1 sentence telling me the conclusion. In your own words.
3 sentences you copy straight from the magazine with "quotation" marks around it. This sentence proves that the conclusion is what you stated in the sentence above this one
The average woodpecker smashes its beak against a hard surface more than 10,000 times a day. Any human who jolted their head like this would likely end up with a concussion. This traumatic brain injury is caused by a blow to the skull. So why doesn’t the constant hammering turn woodpeckers’ brains into mush? For years, it was assumed that woodpeckers had some kind of cushioning in their heads to protect their brains during pecking. Many scientists suggested that spongy bone in the birds’ skulls absorbed and lessened the shock of each impact (see Myth Buster: Hard Headed). This idea was repeated in scientific articles, textbooks, and informative plaques at zoos. Even though the concept “is often presented like a clear-cut fact, there haven’t been any real tests to prove it,” says Sam Van Wassenbergh. He’s a biologist who studies biomechanics, or how living things move, at the University of Antwerp in Belgium.SHOCK ABSORBER: Van Wassenbergh uses a spring-loaded hammer to show why a shock-absorbing skull would make a woodpecker less efficient at pecking. When you think about it, says Van Wassenbergh, the shock-absorbing skull idea doesn’t make much sense. Woodpecker drills into the wood in search of insects to eat. When the bird’s head accelerates forward, the movement generates kinetic energy. This energy of motion is transferred to the tree when the bird slams its beak against the trunk. If a woodpecker’s skull had to cushion, it would absorb some of this energy and decrease the force of the peck. Why would a bird that survives by pecking evolve to do it less effectively? Van Wassenbergh and his team decided to see what was really going on. First, the researchers recorded videos of woodpeckers’ heads in motion. To capture this rapid movement, the scientists needed special high-speed cameras. Each peck lasts only a fraction of a second! Van Wassenbergh’s team recorded videos of six woodpeckers from three species and analyzed the footage. The researchers used a computer to track three points on each bird’s head: one on the skull and two on the beak. The scientists hypothesized that if the birds’ skulls had shock absorbers, the footage would show a “squishing” of the space between the skull and beak—like when a spring compresses. But that didn’t happen. Instead, the birds’ heads moved as one stiff unit, like a hammer. Next, the team wanted to demonstrate why this adaptation would be helpful to the birds. Using computer models, the scientists simulated woodpecker skulls with and without shock absorbers. Then the researchers compared the force of the pecks. “The pecking performance was greatly reduced in the skull with a shock absorber,” says Maja Mielke, a biologist who worked on the study. With shock absorbers, says Mielke, “the poor birds would need to pound even harder to reach the same results.” For a woodpecker, having a shock-absorbing skull would simply be a waste of energy. Science World originally published this diagram in our May 10, 2021, issue. It was based on scientists’ beliefs about woodpecker anatomy at the time. Here it is again—updated based on new research. MYTH: The skull is made of spongy bone that cushions and protects the brain from impactBUSTED! The skull is hard enough to protect the bird from injury, but it doesn’t cushion The eyes have a special membrane that protects them from flying splinters and wood dust.MYTH: Neck muscles are strong and stiff enough to absorb the shock of each peck BUSTED! Stiff neck muscles do not absorb shock—in fact, they help increase the force of each peck.MYTH: The tongue wraps completely around the outside of the skull, providing an additional level of cushioning, and can extend to probe for food inside holes made by the birdBUSTED! The tongue does not provide any observable cushioning. The beak is connected to the skull with thick bone that prevents jolts and vibrations. NEW RESEARCH SHOWS: The woodpecker’s brain is small, which helps prevent concussions that might occur in a larger animal. If woodpeckers’ skulls don’t absorb shock, then why doesn’t constant pecking damage the birds’ brains? To answer this question, the researchers calculated how harmful the blows from pecking actually are. It turns out the hits aren’t that dangerous because the birds’ brains are so small. “Small masses can tolerate stronger impact forces without being damaged,” says Mielke.
Answers
Answer:
The topic of the story is about how woodpeckers can peck without causing damage to their brains.
"The average woodpecker smashes its beak against a hard surface more than 10,000 times a day."
"This traumatic brain injury is caused by a blow to the skull."
"So why doesn’t the constant hammering turn woodpeckers’ brains into mush?"
The conclusion of the story is that woodpeckers don't get brain damage from pecking because their brains are small, which allows them to handle the force of the pecks.
"Small masses can tolerate stronger impact forces without being damaged,"
"The hits aren’t that dangerous because the birds’ brains are so small."
"To answer this question, the researchers calculated how harmful the blows from pecking actually are."
Explanation:
Describe the difference between global knowledge and personal ideas.
Answers
Answer:
Global knowledge is information that is widely accepted and been proven as the truth. It is information that may not necessarily have a source because it is common knowledge and not easily attributed to a certain source. Personal ideas are original to the author and may not be widely accepted. It is important to give credit to others by citing their work to acknowledge that this is not your own findings but rather someone else's. It is plagiarism to use someone else's work as your own without giving credit to their work. -W0lf93
Explanation:
hope this helps
how do you ensure electrical safetyat home
make a poster
Answers
Ground Fault Circuit Interrupters (GFCIs): Install GFCIs in areas where water is present, such as kitchens, bathrooms, laundry rooms, and outdoor outlets. GFCIs detect imbalances in electrical currents and quickly cut off power to prevent electric shocks.
Arc Fault Circuit Interrupters (AFCIs): Use AFCIs to protect against arc faults, which can cause electrical fires. AFCIs detect dangerous electrical arcs and shut off power to prevent potential fires.
Electrical Overload Prevention: Avoid overloading electrical outlets by using power strips with built-in circuit breakers. Spread out high-wattage appliances across multiple outlets rather than using adapters or extension cords.
Proper Cord Usage: Inspect electrical cords regularly for damage, fraying, or loose connections. Replace damaged cords immediately. Avoid running cords under carpets or rugs, and don't pinch them behind furniture or doors.
Outlet Safety: Install tamper-resistant outlets to protect children from accidental electrical shocks. Cover unused outlets with safety caps or plugs.
Light Bulb Safety: Use the correct wattage light bulbs for fixtures to prevent overheating. Always turn off the power before changing light bulbs.
Electrical Appliance Safety: Unplug appliances when not in use and during electrical storms to protect them from power surges. Follow manufacturer's instructions for maintenance and usage.
Outdoor Safety: Use weatherproof electrical outlets and cover them with appropriate enclosures. Avoid using electrical tools or appliances in wet conditions unless they are specifically designed for outdoor use.
Education and Awareness: Educate your family members about electrical safety practices, such as not overloading outlets, avoiding water near electrical sources, and recognizing the signs of potential electrical hazards.
Regular Electrical Inspections: Schedule periodic inspections of your home's electrical system by a qualified electrician to identify any potential hazards or issues.
Ground Fault Circuit Interrupters (GFCIs): Install GFCIs in areas where water is present, such as kitchens, bathrooms, laundry rooms, and outdoor outlets. GFCIs detect imbalances in electrical currents and quickly cut off power to prevent electric shocks.
Arc Fault Circuit Interrupters (AFCIs): Use AFCIs to protect against arc faults, which can cause electrical fires. AFCIs detect dangerous electrical arcs and shut off power to prevent potential fires.
Electrical Overload Prevention: Avoid overloading electrical outlets by using power strips with built-in circuit breakers. Spread out high-wattage appliances across multiple outlets rather than using adapters or extension cords.
Proper Cord Usage: Inspect electrical cords regularly for damage, fraying, or loose connections. Replace damaged cords immediately. Avoid running cords under carpets or rugs, and don't pinch them behind furniture or doors.
Outlet Safety: Install tamper-resistant outlets to protect children from accidental electrical shocks. Cover unused outlets with safety caps or plugs.
Light Bulb Safety: Use the correct wattage light bulbs for fixtures to prevent overheating. Always turn off the power before changing light bulbs.
Electrical Appliance Safety: Unplug appliances when not in use and during electrical storms to protect them from power surges. Follow manufacturer's instructions for maintenance and usage.
Outdoor Safety: Use weatherproof electrical outlets and cover them with appropriate enclosures. Avoid using electrical tools or appliances in wet conditions unless they are specifically designed for outdoor use.
Education and Awareness: Educate your family members about electrical safety practices, such as not overloading outlets, avoiding water near electrical sources, and recognizing the signs of potential electrical hazards.
Please can someone help me need help with these 5 questions!! and QUICK!
I need it done REALLLLLYYYYY soon!! (more like now but-)
(20 points for the answer to all of them)
Answers
Answer:
10. dependent as a change has occurred which has affected something else which is measurable.
11. dependent as a change is made to the environment this is why some species cannot live there as they have adapted to the climate.
12. Dependent due to change occurring it has resulted in the population decreasing which is measurable.
13. Dependent as the animal's and plants' survival is reliant on the environment.
14. Dependant as the plants require sunlight for photosynthies
Answer:
All are dependent
Explanation:
Using the knowledge you have about electricity, what invention would you create to provide electricity for those third world countries who need it? Post a picture of your invention listing the significance. If you have a country specifically in mind this could help please list that country, as well.
Answers
Answer:
I would recomend stuff like in one of Mark Rober's videos about a $1.00 microscope and centrifuge.
Explanation:
Harvard is working on cheap ways to allow third-world countries to have these types of machines without the need for electricity.
1.The putt shot is used for hitting the golf ball off of the golf tee.
False
True
2.
Which two letters are used to help set up for a full swing?
D & A
C & O
V & A
B & T
3.Which two letters are used to help remember how to complete the full swing?
B & O
T & F
C & O
V & A
4.Which club is used for the putt shot in golf?
driver
hybrid
wedge
putter
5.Which club is used for the full swing in golf?
putter
hybrid
driver
wedge
Answers
Answer:
1.True 2.
Explanation:
Hi! I really need help on these questions, it would be great if you can answer them!
Answers
1: Equilibrium
[] When two forces are equal in opposite directions, they are in a state of equilibrium
2: Friction
[] It can be hard to sometimes slide a paper across a table, roll a car across the ground, etc etc. This is because of a force called friction which resists motion
3: Displacement
[] Work is only "done" when the object or surroundings are having movement, or in motion, and this creates displacement
4: Force
[] A force is a push/pull in any direction, this is a simple definition so not much can be added.
5: Inertia
[] Inertia is a force that likes to remain unchanged, or without movement
6: Effort
[] "Meg is holding up weight without movement. She hasn't done any work since it did not move, but is tired. Why?" Effort! She still put in effort even though no "work" happened
7: Work
[] Force times displacement is the equation for work
8: Motion
[] Look back to #3, when there is motion we can tell work is done
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather
What is the name for a quantity that is only a magnitude?
A. Vector
B. Scalar
C. Coordinate
D. Force
Answers
Answer:
The correct answer would be B) Scalar
40 POINTS suppose you already know how many ants it takes to lift an object straight up (using the 10-cm stick). How can you predict the number of ants that will be needed to lift the object with an inclined plane of a certain length?
Answers
Answer:
The work used to lift an item equals the force needed times the distance moved. You can estimate work by multiplying the number of ants times the stick length.
force needed times the distance moved.
You can estimate work by multiplying the
number of ants times the stick length.
WILL RATE BRAINLIEST!!!
When you use electricity in your home,
which resources are powering it?
Research the energy resources used
to power your state’s electrical grid
(that’s what supplies your home with
electricity). In the space below or on
a separate sheet of paper, create an
informative handout to provide to the
people of your state.
Include the following information in your handout:
• Which state do you live in?
• What is the population of your state?
• What percent of the electricity in your state comes from
nonrenewable resources?
• What percent of the electricity in your state comes from
renewable resources?
• What percent of the electricity in your state comes from
nuclear energy?
• Which renewable resource is used the most in your state?
• What is an interesting fact about energy usage in your
state?
I live in United Arab Emarates/Dubai
Answers
Powering Your Home: Understanding Energy Resources in Dubai, United Arab Emirates
Dubai, one of the seven emirates of the United Arab Emirates, is a rapidly growing city with a population of over 3.3 million people. With the increase in population and development, the demand for electricity has also risen significantly. Have you ever wondered where the electricity that powers your home comes from? In this handout, we will provide you with information about the energy resources used to power the electrical grid in Dubai.
Nonrenewable Resources:
Dubai relies heavily on nonrenewable resources such as natural gas and oil to generate electricity. As per Dubai Electricity and Water Authority (DEWA), in 2020, 94% of the electricity generated in Dubai came from natural gas and 6% from coal.
Renewable Resources:
Dubai has been working to diversify its energy mix by investing in renewable resources. According to DEWA, 6% of Dubai's electricity in 2020 was generated from renewable sources, such as solar and waste-to-energy. DEWA has set a target to increase the share of renewable energy in Dubai's energy mix to 75% by 2050.
Nuclear Energy:
Dubai is also investing in nuclear energy to diversify its energy mix. The first nuclear power plant in the UAE, the Barakah Nuclear Energy Plant, started operations in 2020. It is expected to generate 5.6 GW of electricity and will contribute to reducing carbon emissions.
Most Used Renewable Resource:
Dubai has the world's largest single-site solar energy project, the Mohammed bin Rashid Al Maktoum Solar Park. It is a key component of Dubai's clean energy strategy, and its capacity is expected to reach 5 GW by 2030. The solar park uses photovoltaic solar panels to convert sunlight into electricity.
Interesting Fact:
Dubai is home to the world's tallest building, the Burj Khalifa, which has been designed to be energy-efficient. It uses a combination of technologies such as a high-performance glass facade, an efficient air-conditioning system, and a double-decker elevator system that reduces energy consumption by 20%.
Conclusion:
Dubai's energy mix is currently dominated by nonrenewable resources, with natural gas being the primary source of electricity generation. However, the city is making significant strides to increase the share of renewable energy and diversify its energy mix. By investing in nuclear energy and the Mohammed bin Rashid Al Maktoum Solar Park, Dubai is working towards achieving its goal of becoming a sustainable city and reducing its carbon footprint.
Answer: Windmills and solar panels
Explanation: It is used by solar energy from energy and friction with the atmosphere and CO2
Which of the following would cause the greatest decrease in gravitational force between the earth and the moon?
an increase in the moon's mass
an increase in the earth's mass
an increase in the distance between the earth and the moon
a decrease in the distance between the earth and the moon
Answers
Answer:
A decrease in the distance between the earth and the moon.
Scientists have discovered convection currents inside Earth. Explain how these convection currents move and what layer(s) they occur in.
Answers
Answer:
It occurs in the mantle. As the core heats up the bottom of the mantle, the particles move faster causing the mantle to lose density. That causes it to rise and the rising starts the Convection Currents.
The convection currents occur in the mantle layer of the earth The stiff tectonic plates of the Earth move in response to convection currents in the planet's fluid, molten core.
What are convection currents?Convection currents are fluid motions brought on by temperature or density variations within a substance. Because the particles within a solid are fixed in place, convection currents are only visible in gases and liquids. A straightforward illustration of convection currents is warm air rising toward a home's ceiling or attic.
Differential heating leads to convection currents. Warm, less dense, lighter material rises while cool, more dense, heavier material sinks. Convection currents are patterns of circulation that are produced by this movement in the Earth's mantle, oceans, and atmosphere.
It takes place in the mantle. The particles travel more quickly toward the bottom of the mantle as the core heats it, causing the mantle to lose density. It rises as a result of that, and the rising causes the Convection Currents to begin.
To know more about convection currents:
https://brainly.com/question/29763773
#SPJ2
Explain what happens as the heart grows bigger.
Answers
Initially, the heart may grow bigger as a compensatory mechanism to try to keep up with increased demands for blood and oxygen. For example, if a person engages in regular exercise, their heart may enlarge to accommodate the increased demand for blood and oxygen to the muscles.
However, if the heart continues to grow over time, it can become less efficient at pumping blood and may develop structural abnormalities that increase the risk of heart failure, arrhythmias, and other complications.
In some cases, cardiac hypertrophy may be reversible if the underlying cause is treated, such as by managing high blood pressure or heart disease. However, if left untreated, hypertrophy can lead to irreversible damage to the heart muscle and may require more aggressive interventions, such as medication, surgery, or other medical procedures to manage the condition.
only known planet able to support life
1
Earth
2. closest planet to the sun
7
Mars
3. hottest planet in the solar system
Jupiter
4. largest planet in the solar system
Neptune
5. large ring system
Mercury
6. blue color from methane gas
Uranus
7. once had water on surface
Venus
8. rotates on its side
Saturn
Answers
Example is
Your turn it in score is 98%. I am not allowed to grade any assignments that have a score that high. Please redo the assignment, and re-submit. Thanks.
Mr. Z what does this mean somebody help?
Answers
Answer: He can't grade it your to smart .
Explanation:
This image of a roller coaster is designed to show important information about potential and kinetic energy. One of these labeled pieces of information is incorrect. Which information is wrong, and why? A) The spot with the “maximum kinetic energy” should be on the lowest point of the roller coaster, at the far left side on the bottom. B) The roller coaster would only have kinetic energy at the point labeled “gravitational potential energy and kinetic energy.” C) The roller coaster would only have potential energy at the point labeled “gravitational potential energy and kinetic energy.” D) The spot marked “maximum gravitational potential energy” should be on the lowest point of the roller coaster, at the far left side on the bottom.
Answers
Answer:
no picture
Explanation:where is the picture
Erin is keeping a science journal. She wrote the following paragraph that explains how light travels through different mediums. But she’s made one mistake. Which sentence in Erin’s journal is incorrect?
A ray of light passes through the air and enters the water inside a metal container. The light ray bends as it crosses the boundary between air and water. Once it hits the bottom of the container, the ray gets reflected. The reflected ray passes back through the water and enters the air without bending. In this example, the ray of light is both reflected and refracted.
Answers
Answer: The first part I think
Explanation:
Im not too sure on this one
When you drop something, first of all it accelerates.
The faster it falls, the bigger the force of ______ that acts on it.
choose from the list to complete the sentence:
friction gravity air pressure
note: apparently the answer is friction but it doesn't make sense to me so please explain.
Answers
The faster an object is going, the more resistance there will be. An example of this would be if you're running the faster you run, the more air is going against you.
I hope this helps!
The picture below shows an experiment to find out the highest frequencies which students can hear. When the teacher turns the dial the frequency from the loudspeaker increases. the students put their hands down when they can no longer hear the sound.
Some students put their hands up while others have put their hands down. What conclusion can you draw from this observation?
The teacher suspects that some of the students are not giving honest responses, they are keeping their hands up even when they can no longer hear the sound. How could he check if he is right? *