Answers
Answer:
i feel like i can just take these
Explanation:
Related Questions
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
Answers
Answer:
I think it is c
Explanation:
the correct answer should be c :))
hope this helps you
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).
Answers
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.
To learn more about : Air resistance
Ref : https://brainly.com/question/14877316
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i am the halogen located in the second period of the periodic table.who am i
Answers
Answer:
Fluorine
Explanation:
Halogens is the group right before Noble Gases, or Group 17. They consist of (from Period 1 to 7):
2 - Fluorine
3 - Chlorine
4 - Bromine
5 - Iodine
6 - Astatine
7 - Tennessine
We can see from the Periodic Table of Elements that Fluorine will be our answer.
Answer:
Fluorine
Explanation:
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
Answers
Answer:
B
Explanation:
They both benefit
“Mutual” in mutualism refers to an agreement between two things. In biology, two organisms benefit when mutualism occurs, hence making B the answer.
You will get brainliest if you answer ASAP and if please please answer correctly!! Please only answer if you know!
Answers
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.
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.
Answers
Answer: It bends light and then gathers light.
Explanation:
Answer:
It makes a larger image of the object
Explanation:
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.
Answers
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 properties are unique to electromagnetic waves?
Answers
Answer:
C. Crest and Trough.
Explanation:
All the other properties are shared among longitudinal and transverse waves. Transverse waves are the technical term for electromagnetic waves because electromagnetic waves are transverse.
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:
Answers
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
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
Answers
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)
Answers
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?
Answers
Answer:
Explanation:
driving
Why does air rush out of an inflated balloon? ONLY REAL ANSWERS = BRAINLIEST ABSURD, WRONG ANSWER = REPORT
Answers
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.
in short easy answer pls!
Answers
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:
Does anyone know how to change ur name on here?
Answers
Answer:
i think you can message brainly support.
which is an example of a screw?
Answers
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
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
Answers
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
Answers
In physical weathering, how are ice and plant roots similar?
Both break open rocks by expanding in a crack.
Both cause abrasion and slowly break down rocks.
Both require many cycles of freezing and melting.
Both result from dramatic changes in temperature.
Answers
Answer:
A break open rocks from in cracks
Explanation:
Ice freezes in the crack and expands. Plants start growing in the crack and grow out of it. Both of these cause the rock to slowly break in half from the crack.
Hope this helps :)
Could somebody help me with this question?
Answers
Answer:
50 :)
Explanation:
A person fires a gun standing at a distance of 55 m from a wall. If the speed of sound is 330 ms-1, find the time for an echo to be heard.
pls tell the answer it is urgent
Answers
Answer:
557$-$-%-%-*$7-3*$*2*2663*363737
Answer:divide 55 and 330 to find the answer.
Explanation:
!FIRST TO ANSWER GETS BRAINLIEST!
The energy unit on a food label are
a. degrees
b. calories
c. metal
d. rubber
!!ANSWER QUICKLY!!
Answers
Answer:
Calories
Explanation:
mark me brainliest!!
What is a model? (Science)
Answers
Answer:
a system or thing used as an example to follow or imitate.
Explanation:
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
Answers
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.
To learn more about thermal energy refer to the link:
brainly.com/question/13552918
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what to do when you have a lot to do but little time?
Answers
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
Jamie did an experiment to find out whether cola, diet cola, or water would freeze quickest. She poured three equal amounts of each liquid into paper cups and put all the paper cups in the same freezer. Then she timed how long it took the liquid in each cup to freeze. What should Jamie do to analyze her data?
A. Find the average time it took each liquid to freeze.
B. Look at her data and estimate the answer.
C. Repeat the experiment two more times.
D. Conduct another experiment with other liquids.
Answers
Answer:
It would be C.
Explanation:
To receive the most accurate data, she should repeat the experiment multiple times.
The best way to check that the experiment was accurate the first time is to repeat it.
!!ANSWER FOR BRAINLIEST!!
Which of the following materials would not be a good insulator?
a. wood
b. cloth
c. metal
d. rubber
Answers
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!!!!!!!!!!!!!!!!!
Answers
Answer:
1000=100
x=1
cross multiply
100x =1000
divide both sides by hundred
therefore x=10
so it is 10 meters per minute
If kinetic energy can be transferred to thermal energy, how hard do I have to slap a chicken in order to cook it?
Answers
Answer:
Hard enough
Explanation:
lol
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
Answers
Answer: Silicon (Si)
Explanation: the other response is wrong.