Answer:
Wood and Cloth
Explanation:
(misread it the first time so I'm here to fix it) bur wood would burn and the same for cloth. Metal and rubber keep in electricity
please help me with these
Answer: 14) A. 15)D. 16)B. 17)B. 18)A.
Explanation: Hope this helps, :)
Why does air rush out of an inflated balloon? ONLY REAL ANSWERS = BRAINLIEST ABSURD, WRONG ANSWER = REPORT
Answer:
When a balloon is inflated we increase the pressure inside the balloon so that the pressure inside the balloon is greater than the pressure outside the balloon. The escaping air in one direction provides the force in the opposite direction for the balloon to go in the opposite direction.
Explanation:
I hope this helps.
A falling skydiver is accelerating in the downward direction at 3.29 m/s^2. The mass of the skydiver (including parachute gear) is 67.2 kg. Determine the air resistance force on the skydiver (and accompanying parachute).
Answer:
The force due to air resistance on the skydiver is 438.1 N.
Explanation:
You need to balance forces. If we use the following notation:
Net force on skydiver = F
Force on skydiver due to gravity = F(grav)
Force on skydiver due to friction or air resistance = F(air)
Then:
F = F(grav) - F(air)
because the force of air resistance acts against the force from gravity. You can rearrange this to get:
F(air) = F(grav) - F
Then you can use the equation F = ma to get:
F(air) = ma(grav) - ma
where:
m = mass of skydiver (given in question) = 67.2kg
a(grav) = acceleration of an object due to gravity = g = 9.81 m/s/s on Earth
a = actual acceleration (given to you in question) = 3.29 m/s/s
Simplify the equation to get:
F(air) = m * [g - a]
F(air) = 67.2 * [9.81 - 3.29]
F(air) = 67.2 * [6.52]
F(air) = 438.1 N
When the parachute is opened, the surface area increases, which increases air resistance.
The force due to air resistance on the skydiver is 438.1 N.
What happens to air resistance when a parachute opens?When the parachute is opened, the surface area increases, which increases air resistance. Because air resistance has surpassed weight, the resulting force acts upwards. The parachutist slows down; a lower velocity means less air resistance. At a lower terminal velocity, air resistance and weight become equal.However, the faster the parachute falls, the more drag it creates. The drag force resists gravity's downward movement, pushing the parachute back up. The drag of the parachute increases as it falls until it just balances out the pull of gravity.Net force on skydiver = F
Force on skydiver due to gravity = F(grav)
Force on skydiver due to air resistance = F(air)
Then:
F = F(grav) - F(air)
because the force of air resistance acts against the force from gravity. You can rearrange this to get:
F(air) = F(grav) - F
Then you can use the equation F = ma to get:
F(air) = ma(grav) - ma
where:
m = mass of skydiver (given in question) = 67.2kg
a(grav) = acceleration of an object due to gravity = g = 9.8m/s^2 .
a = actual acceleration (given to you in question) = 3.29 m/s/s
Simplify the equation to get:
F(air) = m * [g - a]
F(air) = 67.2 * [9.81 - 3.29]
F(air) = 67.2 * [6.52]
F(air) = 438.1 N.
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1.Practicing regularly & focusing on specific skills you want to improve is regularity & specificity.
True
False
2. Gradually adding to the number of exercises you preform to prevent injury is the principal of regularity & specificity
True
False
WILL GIVE U BRAINLIEST
The turbines can be seen inside this hydroelectric dam. Why are they located at that particular height?
(1 point)
There is a small drop, so the water will still have a lot of kinetic energy to transfer to the turbine.
There is a large drop, so the water will have a lot of kinetic energy to transfer to the turbine.
There is a large drop, so the water will have a lot of potential energy to transfer to the turbine.
There is a small drop, so the water will still have a lot of potential energy to transfer to the turbine.
Answer: The answer is number is two
Explanation: Because as it says there is a large drop, so the water will still have a lot of kinetic energy to transfer to the turbine.
In the hydroelectric dam, there is a large drop, so the water will have a lot of potential energy to transfer to the turbine. Therefore, option (C) is correct.
How is the energy transformed in the hydroelectric dam?In the hydroelectric dam, electric energy is generated using water from a turbine. The flowing water is utilized to propel the turbines. At first, a huge amount of the flowing water has stored across the dams. The kinetic energy of flowing water is stored in the form potential energy in the dams.
Then the stored water in the dam will fall on the turbines so that the turbines are placed in the deep and rotate the turbines and the potential energy of water to the turbines which converted into mechanical energy.
Then the turbines rotate and generate electricity and the mechanical energy is transformed into electrical energy.
Therefore, turbines in the hydroelecric dams are located at particuler height.
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A box moved 33 meters down a factory conveyor belt at a constant velocity. It moved that distance in
1.5 minutes. What was the box's velocity?
[tex]d = v \times t[/tex]
where d is the distance traveled.where v is the speed.& t is the time taken.[tex]v= \frac{d}{t} = \frac{33}{1.5 \times 60} = \frac{33}{90} = 0.3666 \: meters \: per \: sec[/tex]
Don't forget to change from minutes to seconds by multiplying by 60.Newton's demonstration of objects preferring to travel in straight lines is part of his:
1st Law
3rd Law
2nd Law
Universal Gravitation
Answer:
1st Law.
Explanation:
Newton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.
Hope this helps! Brainliest? :)
What is a model? (Science)
Answer:
a system or thing used as an example to follow or imitate.
Explanation:
A team of engineers is working with a wind turbine. The team is working with a model and testing different angles for the blade of the wind turbine. What would the research question be for this team?
Which angle converts the largest percentage of potential energy from the wind into kinetic energy of the turbine?
Which angle converts the largest percentage of kinetic energy from the wind into kinetic energy of the turbine?
Which angle converts the largest percentage of potential energy from the wind into potential energy of the turbine?
Which angle converts the largest percentage of kinetic energy from the wind into potential energy of the turbine?
Answer:it would be which angle converts the most potential energy to into kinetic energy of the turbine
Explanation:
The best research question would be finding the angle that converts the largest percentage of kinetic energy from the wind into kinetic energy of the turbine.
What is Mechanical energy?Mechanical energy is the sum of kinetic and potential energy of the body. Mathematically -
E[M] = E[K] + E[P] = 1/2mv² + mgh = m(1/2v² + gh)
Given is a team of engineers is working with a wind turbine. The team is working with a model and testing different angles for the blade of the wind turbine.
Flowing wind carries very small particles and other light components it finds in its way. The sum of the kinetic energies of these individual particles and components are responsible for the kinetic energy of the flowing wind. Now, this wind is utilized to rotate the turbine blades and generate electricity. In this process, the kinetic energy of the wind does work on the blades of the turbine such that the amount of work done causes the blades to rotate. Now, the rotating blades will have rotational kinetic energy. For a mathematical model -
E[wind] = E[blades]
1/2mv² = 1/2Iω²mv² = Iω²
mv² - Iω² = 0
Hence, the total energy remains conserved.
Therefore, the best research question would be finding the angle that converts the largest percentage of kinetic energy from the wind into kinetic energy of the turbine.
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Sam was was driving his car to New York
The distance from his place to NY is 30km
It took him 60 Minutes to go there
What was Sarah Doing?
Answer:
Explanation:
driving
which is an example of a screw?
Answer:
The answer is C.
Explanation:
Although a staircase isn't what you would typically think of when you think of a screw, it does fall under the screw category.
Hope that helps!
Answer:
B
Explanation:
B
Help please, I don't understand this at all. I'm in the sixth grade. Please provide an answer that'll look like a sixth grader provided.
+ Extra points
+ Brainliest
Answer:
Without air, you don't fly. Air moves..up, down, and sideways. What air is doing affects what your plane is, or will do. It can help you are kill you. Learn.
Explanation:
I really need help (ill give brainlest)
Which of the following is an example of mutualism?
A. Mistletoe lives on trees. It sends special root-like structures into the tree's bark and absorbs food and water. The tree suffers when it cannot produce enough food for itself and the mistletoe.
B. As the sloth moves from shade to light, the algae get the sun they need to produce their food. The green algae color camouflages the tree sloth from predators. They both benefit.
C. A tick obtains food from the blood of its host.
D. Cape buffalos move through the grass and kick up lots of insects. Cattle egrets eat the insects the buffaloes stir up. The egrets benefit and the buffalo is not harmed, nor does it benefit.
SCIENCE! 18 POINTS
Answer:
B
Explanation:
They both benefit
The creation of carbon monoxide is an effect. What is one cause?
Answer:
THE PROBLEM
Carbon monoxide (CO)—a colorless, odorless, tasteless, and toxic air pollutant—is produced in the incomplete combustion of carbon-containing fuels, such as gasoline, natural gas, oil, coal, and wood. The largest anthropogenic source of CO in the United States is vehicle emissions.
Explanation:
The incomplete burning of the natural gases petrol or diesel is one of the causes of the creation of carbon monoxide.
What is pollution?It can be defined as the origination of the contaminant substance that poisonous or harmful to our natural environment.
In our environment, pollution can take many different forms depending on the quantity and nature of the contaminant. For instance, the eutrophication process can result in water pollution.
Air pollution persists due to the contaminants present in atmospheric air such as smog.
Land pollution exists because of contaminated soil in the lithosphere.
There are several other types of pollution as well such are sound pollution, radioactive pollution, plastic pollution, oil spill pollution, etc.
When hydrocarbon fuels (such as natural gas, gasoline, and diesel) are burned, carbon monoxide is also produced as a pollutant. The effectiveness of combustion determines the relative amount of CO produced. During their MOT test, older vehicles are inspected yearly for CO emissions. It's interesting to note that only one of the two carbon oxides inhibits combustion; for this reason, carbon dioxide is used in fire extinguishers.
One of the factors contributing to the production of carbon monoxide is the incomplete burning of natural gases such as gasoline or diesel.
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You will get brainliest if you answer ASAP and if please please answer correctly!! Please only answer if you know!
Answer:
Acquired traits are not passed down from generation, they are gotten from the person doing things, so that would be:
B. A back injury and D. A short hair cut
Explanation:
kleann
Answer:
B and D
Explanation:
Technically these are not traits. They are subjects that someone has acquired over the period of their life.
According to the law of conservation of energy, which changes would
decrease the total energy of a system?
A. An addition of 500 J of thermal energy and a loss of 250 J of
thermal energy
O B. An addition of 300 J of kinetic energy and a loss of 250 J of
thermal energy
O C. An addition of 400 J of GPE and a loss of 350 J of thermal energy
O D. An addition of 200 J of thermal energy and a loss of 350 J of
kinetic energy
Answer:
Option D
Explanation:
I hope this helps
Changes that would decrease the total energy of a system an addition of 200 J of thermal energy and a loss of 350 J of kinetic energy.
What is thermal energy?The energy present in a system that determines its temperature is referred to as thermal energy. Thermal energy flows as heat. Thermodynamics is a whole field of physics that studies how heat is transmitted across various systems and how work is performed in the process.
According to the law of conservation of energy, which changes would
decrease the total energy of a system is an addition of 200 J of thermal energy and a loss of 350 J of kinetic energy.
An addition of 200 J of thermal energy and a loss of 350 J of kinetic energy.
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what to do when you have a lot to do but little time?
Answer:
Focusing on one specific task
Explanation:
So just focus on one important task. Clear everything else away, and focus on that. By picking your tasks carefully, you're taking care with the container of your time. You can pick important tasks or joyful ones, but you're being conscious about the choices.
I recommend calming down, sitting in a quiet and comfortable space and listening to study music while studying each different subject, one at a time.
Study Music Recommendations:
- Lofi Hip Hop Radio
- MONOMAN
- Fall In Chill
- Ambition
What Subjects To do First Recommendations:
I recommend doing the subjects that are the most easiest for you, once you get the easy ones out of the way, you can spend the rest of your time trying to really learn the hard subjects without having to worry about the other ones!
Fun Fact:
Studying is not just important for educational development, but also builds personal skills. Having good study skills can improve your confidence, competence, and self-esteem. As well as helps reduce stress and anxiety around deadlines and exams.
I hope this helped! If you dont understand something or would like more of an explanation, feel free to contact me! :D
identify the independent and dependent variables.
1. Question: Which brand of pencil (Staples, Stafford, Badger) will sharpen the fastest?
Independent variable:
Dependent variable:
2. Question: Does the amount of air in a basketball affect how high it will bounce?
Independent variable:
Dependent variable:
3. Question: Does the flavor of Gatorade affect how fast someone can run?
Independent variable:
Dependent variable:
Answer:
a.1- independent variable is the sharpener, dependent variable is the pencil brand
a.2- independent variable is the basket ball and dependent variable is amount of air
a.3- independent variable is the person running and dependent is the Gatorade flavor
Explanation:
An independent variable is exactly what it sounds like. It is a variable that stands alone and isn't changed by the other variables you are trying to measure. A dependent variable is exactly what it sounds like. It is something that depends on other factors
Stratus clouds, like the ones shown in the picture, look like large gray blankets hanging low across the sky. When these are present, it will usually ____ if it is warm, and ____ if it is cold.
1. rain, snow
2. snow, drizzle
3. drizzle, be windy
4. be windy, be sunny
radio waves have long wavelengths.
What does this tell you about their frequency?
A they have high frequencies.
B. they have low frequencies
C. frequency is unrelated to wavelength.
Answer:
B. they have low frequencies because a longer wavelength means that the wave moves slower thus meaning it has a lower frequency.
Which of the following is a similarity between electromagnetic waves and mechanical waves? Both types of waves–
Answer:
A. transfer energy from one point to the other
Explanation:
When waves transfer energy, the matter doesn't move with it, so the energy goes from one point to the other. You can see this more clearly on a transverse wave example.
what could this answer be I am a main group or representative element. I am located in the third period. I am a metalloid. who am I
Answer: Silicon (Si)
Explanation: the other response is wrong.
Which statement describes a concave lens?
It bends light and then gathers light.
It is thicker in the middle than at the ends.
It makes a larger image of the object.
It makes a smaller image of the object.
Answer: It bends light and then gathers light.
Explanation:
Answer:
It makes a larger image of the object
Explanation:
Could somebody help me with this question?
Answer:
50 :)
Explanation:
please help!!!!!!!!!!!!!!!!!
Answer:
1000=100
x=1
cross multiply
100x =1000
divide both sides by hundred
therefore x=10
so it is 10 meters per minute
Which statement correctly identifies the relative levels of kinetic and potential energy in a hydroelectric dam?
Kinetic and potential energy are both highest at the bottom.
Kinetic and potential energy are both highest at the top.
Kinetic energy is highest at the top; potential energy is highest at the bottom.
Kinetic energy is highest at the bottom; potential energy is highest at the top.
Answer:
the answer is the third question
Explanation:
because while the water is behind the dam it has potential energy and while it goes down it stores up kinetic energy then generators convert all the energy into electricity and that is one source that makes power
Kinetic energy is highest at the bottom; potential energy is highest at the top, therefore the correct answer is option D.
What is mechanical energy?
As total mechanical energy is the sum of all the kinetic as well as potential energy stored in the system.
ME = KE + PE
As given in the problem we have to find out which statement correctly identifies the relative levels of kinetic and potential energy in a hydroelectric dam,
The total mechanical energy of the water in a hydroelectric dam is the sum of the kinetic energy and the potential energy which interconvert into each other.
Thus, Kinetic energy is highest at the bottom; potential energy is highest at the top, therefore the correct answer is option D.
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Radio waves have long wavelengths.
What does this tell you about their frequency?
A they have high frequencies.
B. they have low frequencies
C. frequency is unrelated to wavelength.
in short easy answer pls!
Answer:
Air always moves from high-pressure places to low-pressure places. This means air moves from denser air to less dense air. This movement of air results in wind. If, for example, there was an area of high-pressure air east of an area of low-pressure air, then the wind would be coming in from the east.
Explanation:
Select the best answer from the choices below. Standing waves are formed by:
a
A wave hitting the surface of an object and bouncing back
b
Light moving from one medium to another
c
Two or more identical waves moving in opposite directions
d
Waves moving around an obstacle
Answer:
I think it is c
Explanation: