As a pelican flies through the air, it flaps its wings, thereby pushing down on the air below. What is the reaction force?
A the force of air resistance that resists the pelican's forward movement
B the air pushing back up on the wings of the pelican
C the force of gravity pulling the pelican down
D the air around the pelican pushing down on other air molecules farther below
Answer:
the reaction force in this situation would be B
Explanation:
The action is the wings pushing down whilst the reaction is the air pushing up which allow the bird to fly .
plz mark brainliest to help me lvl up :P
Explanation to help get you the answer, not straight-up though:
Both fixed and flapping wings work by deflecting air downwards, says Professor Geoffrey Spedding, Chairman of Aerospace and Mechanical Engineering at the University of Southern California. " [When air is forced downwards] the reaction force is upwards, and this lift force supports the bird's weight. The bird’s wing pushes against the air and the air pushes back with an equal and opposite force. Unfortunately, with every down stroke there must be an up stroke, what goes up must come down. If the bird had an equal upward stroke to its downward stroke, the net force of the bird’s wing flaps would equal zero.
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Hope my knowledge helped you get an answer :3
What is the amplitude of the wave? (I don’t know if the answer choice I marked is correct)
Watch the VIDEO and then explain the steps to build a simple electromagnet.
how high will a ball bounce if its dropped from 50cm
Students working together to understand information is best described as
1. independent study.
2. home schooling.
2. collaborative learning.
4. secondary education.
If an object has kinetic energy, what must it be doing?
Answer:
It has to be moving in order for it to be kinetic energy and potential energy is when is not moving.
Answer:
The Object Must Be Moving!
Explanation:
Kinetic energy is the energy an object has because of its motion. If we want to accelerate an object, then we must apply a force. Applying a force requires us to do work. After work has been done, energy has been transferred to the object, and the object will be moving with a new constant speed.
If a girl is standing still and holding a box, is she doing any work? (No)
The _____ on the box is not in the same _____ as the movement
Answer:
gravity
Explanation:
The kinetic energy of the pom-pom came from potential energy in the system.
How did potential energy gets stored in the spring/pom-pom system?
Answer:
I believe that the answer is that in physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors. Common types of potential energy include the gravitational potential energy of an object that depends on its mass and its distance from the center of mass of another object, the elastic potential energy of an extended spring, and the electric potential energy of an electric charge in an electric field.
The elastic potential energy of a spring is the energy stored in the spring due to its elastic nature.
The potential energy stored in a spring is known as elastic potential energy. The elastic potential energy of a spring is the energy stored in the spring due to its elastic nature.
For example, when a spring is compressed it acquires potential energy which will be converted to kinetic energy of the object impacted by the spring.
The elastic potential energy of spring is given as;
[tex]U_x = \frac{1}{2}kx^2[/tex]
where;
k is the spring constantx is the extension of the spring.Thus, we can conclude that, the elastic potential energy of a spring is the energy stored in the spring due to its elastic nature.
Learn more here:https://brainly.com/question/17717335
NASA plans to launch a new satellite to orbit the Earth. As the satellite is launched the thrust of the hot exhaust gas is pushed through the rocket nozzle and is accelerated toward the rear of the rocket. In turn, the rocket engine is then lifted off of the ground. According to Newton's 3rd law of motion, which statement below is true of the forces involved?
A The downward force exerted by the exhaust on the engine is greater.
B The magnitude of both forces is equal to zero acting in opposite directions.
C Both forces are equal in magnitude, but opposite in direction.
D The upward force exerted by the engine on the exhaust is greater.
Answer:
A
Explanation:
What part (or parts) of this system have kinetic energy?
Answer:
All moving objects have kinetic energy
Explanation:
( that should help....right?)
Answer:
Explanation:
when you crank you make kinetic energy and then the kinetic energy makes potential energy.
Does this help?
A rock is thrown straight up from the surface of the Earth. Which one of the following statements describes the energy
transformation of the rock as it rises? Neglect air resistance.
a) The total energy of the rock increases.
b) The kinetic energy increases and the potential energy decreases.
c) Both the kinetic energy and the potential energy of the rock remain the same.
d) The kinetic energy decreases and the potential energy increases.
e) Both the potential energy and the total energy of the rock increase.
Answer: d
Explanation:
Uuhhh I’m not good at explanations...
The kinetic energy decreases while the potential energy increases.
Option d is the answer because as soon as this ball gets thrown from the surface of the earth kinetic energy would be at its greatest.
we have
[tex]k=\frac{1}{2} mv^{2}[/tex]
The velocity is going to be minimized. As the ball is going up its velocity would be falling or decreasing due to gravity. [tex]k=\frac{1}{2} mv^{2}[/tex] would then have a smaller value. So kinetic energy is reducing/decreasing.
We have potential energy as u = m*g*h = 0. This is because the height is 0 as the ball is released. But as the ball goes up, the height would start to increase so the potential energy increases.
In conclusion as the ball is thrown straight from the earth, kinetic energy decreases and potential energy increases.
Read more at https://brainly.com/question/2858799
WILL GIVE BRAINLIEST DON'T KNOW IF I SPELLED IT WRONG BUT U KNOW WHAT I MEAN:)
SENTENCE: All mimsy were the borogoves
—"Jabberwocky,"
Lewis Carroll
QUESTION:
What real words could replace the two underlined nonsense words in this sentence?
ANSWERS:
A. sometimes, yellow
B. raining, angry
C. run, heavenly
D. frazzled, creatures
Answer: well jabberwocky means like happy or like good vs evil
Synonyms: abracadabra, double talk, gibberish, gobbledygook, mumbo jumbo, babble, blather, blatherskite, gabble, jabber and jargon
Definition: invented or meaningless language; nonsense.
Explanation:
Answer:
d mark me brainliest plse
Explanation:
HELP ME ASAP!!! THIS IS DUE IN LIKE 10 MINUTES!!!
Which image shows an inclined plane?
A. A bowling alley with a set of pins at one end.
B. A ping pong table.
C. A bus with a ramp leading down to the ground from its front door.
Answer:
C
Explanation:
It would have to be a bus with a ramp.
Think about it, an inclined slope is kinda like a right triangle, and its a ramp, ramps go down :)
Answer:
Its C
Explanation:
Help again i need it quick
Answer:
it seems that the answer should be 7.5 mph as the average
Explanation:
sorry i did (s x t) when it was (s/t)
Answer:
15mph
Explanation:
Hope this helps
Which appear goes along with this picture
Answer:
it seem to be an illuviation because you can see clouds
Explanation:
HELP ASAP ... i have no idea
An axe used to split wood is driven into a piece of wood for an input distance of 0.03. If the mechanical advantage of the axe is 0.85, how far apart ( output distance ) is the wood split? ( Round to two decimal places. ) ( Ex: 1.28)
Answer:
.9 im guessing
Explanation:
The diagram shows two dodgeballs colliding. The red arrow shows the direction of force of the moving ball striking a stationary ball. Which arrow shows the direction of the force exerted by the stationary ball on the moving ball?
Answer: It’s the second arrow from the top to the bottom
Explanation:i did the test
The second arrow is the right arrow.
Rahim is watching his favorite football team on television. In order to work, the television must be plugged into an electrical outlet. When the television gets turned on, what is the main energy transformation demonstrated by the television?? heres the answer choices A. heat energy into electrical energy
B. electrical energy into heat energy
C. electrical energy into light energy
D. light energy into electrical energy
Calculate the mass on the following pic
Answer:
1. 25 2. 3.75 3. 21.5
Explanation:
M=FxA
1. 5x5
2. 5x.75
3. 5x4.3
the force on all is 5n
What is the net force of this car?
A. 10 N
B. 17 N
C. 0 N
D. 3 N
Answer:
the correct option is D
Which activity would help maintain homeostasis during exercise?
increasing the amount of water excreted from the kidneys
decreasing the heart rate
developing goose bumps on the skin
speeding up the rate of breathing
Answer:
Speeding up the rate if breathing
Explanation:
The more and quicker you breathe, the more oxygen your cells get
The kinetic energy of a boulder weighing 50.0 N sitting still on the edge of a cliff 25.0 m high is
a
25.0j
b
0.0j
c
2.0j
d
750.0j
Would a malfunction in the circulatory system affect other organ systems?
Yes. They all work together. If one system doesn't function properly it can cause other systems to malfunction or shut down.
No. Each system functions independently
Free Test Answers!!
Test: Interaction of Forces Unit Test Answers:
D. The balls both have the same electrical charge.
C. The magnetic force will be strongest on box #1.
B. Load or an electrical device
A. motion
C. Insulators obstruct the flow of electrons, whereas conductors allow electron to flow freely.
B. A parallel circuit has more than one path for the circuit to take.
D. Box B because it has more mass.
A. It will be an unstable system because it will not be able to recover from the disturbance.
B. 7.0 ohms
B. on.
C. Mars has less mass than Earth.
B. solenoid
B. static electricity.
B. false
The magnetic forces makes a maglev train to float above the tracks because of the repulsion property and similar magnetic poles.
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Box A isn't stable and will fall over since it's being pulled down and if you push it if nothing is around to secure it's movements. Box B is stable and will only side if nothing is around to secure it's movements. The mass of the boxes could also affect what would happen if you pushed the box, if Box B had a heavy mass it most likely wouldn't move. If Box A had more equilibrium and a heavy mass, It would have a better chance of not falling over.
<3 Enjoy,
Dea
Answer:
Thank you very much.
Explanation:
Options: Power, energy, time
_____ is the rate of _____ it takes to use a certain amount of _____
Answer:
power is the rate of time it takes to use a certain amount of energy
Explanation:
i think,, dont take my word for it tho.
sorry if its wrong :'(
The narrator of a story
is always the same person as the author.
is always part of the narrative.
determines the story's characters and events.
provides information about characters and events
Specific Heat and Thermal energy question. 30 points, will give brainliest. Please answer. Pic attached
Answer:
.69
Explanation:
The narrator of The Jungle Book by Rudyard Kipling portrays the man cub as cute and endearing. How might this characterization be different if Shere Khan were the narrator?
The man cub would be described as a food item, because Shere Khan would want to eat him.
The man cub would be described as friendly, because Shere Khan would want to help him.
The man cub would be described as dangerous, because Shere Khan is scared of humans.
The man cub would be described as smart, because Shere Khan admires human intelligence.
Answer: the answer is C - The man cub would be described as dangerous, because Shere Khan is scared of humans.
Explanation: Because Its The man cub would be described as dangerous, because Shere Khan is scared of humans. Done its rite one I got a 100% on th quiz.
A ball is thrown up into the air. Describe the work done on the ball and the energy transformations that take place
between the time the ball is released and the time it reaches its maximum height.
Answer:
so if the ball is thrown up it will eventually fall right? so what it's asking is how hard and fast the ball is thrown and so the time is released it will go up, and by the time it reaches the maximum height it will fall.