Answers
Related Questions
Will give brainliest!! How would you write the direction of the vector above as a global angle?
Answers
Answer:
Assuming they're unit vectors (length of 1)
You simply add them together.
The vector pointing right can be described with X and Y
(1, 0).
The vector pointing down
(0, -1).
The numbers are taken from the axis in X and Y directions.
If you add them together you get a final vector.
(1, - 1)
This gives you -45° pointing South East.
Or 360°-45°=315°
Which statement describes the pattern in the density of gases in the
atmosphere?
A. They are least dense in the atmosphere near sea level
B. They are less dense near the top of the atmosphere
C. They are densest near the middle of the
atmosphere
D. They are every dense thoughout the attesohere
Answers
Because less particle are found near the top of the atmosphere
Gases are less dense near the top of the atmosphere.
What is atmosphere?All life on Earth is shielded by the atmosphere, a layer of gases that regulates temperatures within a narrow range and deflects harmful solar rays.
The layer of gases that covers Earth is known as the atmosphere. The gravitational pull of the Earth keeps it close to the planet's surface. The three primary gases that make up the atmosphere are argon, oxygen, and nitrogen.
Density of atmosphere is high at sea level and gradually decreases with height. And at top of the atmosphere, gas is less dense.
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write an essay on the great wall of china
Answers
During the Ming dynasty (1368-1644) was when much most of the wall was added. The Mind dynasty suffered from their attackers the Dadan, Nuzhen, and Tufan tribes. The Ming court built a lot more walls in the north as an attempt to keep out the attacking tribes. They built the walls much more elaborate and durable than the Qin Dynasty. There were many walls, fortresses, and watch towers along the wall which made the country more successful. Even with all the new construction on the wall the Ming dynasty was defeated by the Oirats in the battle of Tumu in the year 1449. The Ming dynasty had failed to keep the Mongolian and Manchurian tribes under control and it had weakened the Ming Empire. After the Mings loss in this battle they built more walls to make them less vulnerable if they were attacked. Towards the end of the Ming dynasty the Great Wall helped a lot to defend them from the Manchu invaders. The Manchus got into Beijing through the Shanhaiguan gates and took over the city ending the rule of the Ming dynasty and starting the new rule of the Qing Dynasty. The Qing Dynasty extended Chinas territory farther north beyond the Great Wall. The wall didn’t protect China’s border anymore so, construction on the wall stopped and soldiers abandoned their posts on the wall. The wall wasn’t used again after.
Today, the Great Wall is still standing in some parts but people fear that itthe Great Wall] demonstrates the manifestation of the wisdom and tenacity of the Chinese people.”(cortland.edu). China is considered one of the world’s oldest civilizations with the first dynasty beginning in 221 B.C.. A famous icon of this great civilization is the Great Wall of China, or known to the Chinese as Wan Li Chang Cheng. During the Warring States period, many feudal societies built their own sections for security. Eventually the walls were connected and there was a unified China. With The Great Wall of China is known as the largest construction project to be put in effect in all of world history. The wall, also known in China as "long wall of 10,000 li," is a collection of numerous short walls extending along the crest of hills on the southern edge of the Mongolian plain. Although it is a common misconception that the Great Wall of China is one long continuous wall, it 's structural inconsistency in no way undermines its greatness. The wall has been built, destructed,includes modules of ________ so you can see the construction of _____ Today I am going to be presenting the Great Wall of China and what political and military reasons it was built for. The construction was a feat of great magnitude and reflected the innovations and technological advancements of the Ancient Chinese. The reason I have decided to focus upon the Ancient Chinese is because I find China a very interesting civilisation. The ancient Chinese civilisation began 7,000 to 8,000 years ago and about
The Great Wall of China James Allen World History 1st period February 1, 2015 The first unified Chinese empire was formed in 221 B.C., that was when seven states were brought together by Shi Huangdi, a conqueror from the state of Qin. Shi Huangdi means “first emperor.” Until the twentieth century all rulers of imperial China called themselves the emperor. The emperor was believed, by the people of China, to be the son of heaven, God-like
Explain why both a power source (like a battery) and a complete circuit are necessary for an electromagnet to function.
Answers
Answer: So that it can function.
Explanation:
A model rocket accelerates at 15.3 m/s2 with a force of 44 N.
Calculate the mass of the rocket. Round your answer to the nearest tenth of a kg.
The mass of the rocket is
kg.
Answers
Answer:
The answer is 2.88 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
From the question we have
[tex]m = \frac{44}{15.3} \\ = 2.875816...[/tex]
We have the final answer as
2.88 kgHope this helps you
Answer:
2.9
Explanation:
In the equation you get 2.88 but you round that to the nearest tenth so you get 2.9
Someone please help me Im confuzled.
Answers
its a solid from the pressure they put on a tennis ball would make it full of moving at fast speed matter bites compacted together but still moving.
. Which color has the shortest wavelength? *
2 points
a. Violet
b. Yellow
c. Blue
d. Red
Answers
Answer:
Violet
Explanation:
Occurring to Google red has the longest while violet has the shortest. Violet is the shortest at 380 nanometers.
Answer:
violet
Explanation:
Violet has the shortest light wavelength.
Please mark brainliest. Thanks!!!!
A race car accelerates uniformly from 18.5 m/s to 46.1 m/s in 2.47 seconds.
Determine the acceleration of the car and the distance traveled.
Answers
Answer:
79.8 is the answere
I hope this HELP :)
Explanation:
Here, initial velocity is u=18.5m/s and final velocity is v=46.1m/s
Time taken t=2.47s
If a be the acceleration of the car.
Using v=u+at,
46.1=18.5+a(2.47)
⟹ a=11.17m/s
2
If d be the distance traveled by car.
Using formula v
2
−u
2
=2ad,
(46.1)
2
−(18.5)
2
=2(11.17)d
⟹ d=79.8m
a feather will fall through the air more slowly than a brick because of
Answers
Answer:
Air resistance
Explanation:
Because the air gives a much greater resistance to the falling motion of the feather than it does to the brick. The air is actually an upward force that is acting against gravity and slowing down the rate at which the feather falls.
5. Suppose you have three identical drinking cups: one made of plastic, one foam, and one paper.
You want to find out which cup will keep your hot cocoa hot for the longest time.
a. Phrase a formal question for this experiment.
b. What is your hypothesis?
c. What is the experimental variable?
d. What are three important control variables?
e. What type of evidence will you collect to test your hypothesis?
f. Challenge: Conduct your experiment and summarize your findings.
Answers
Answer:
a) How the cooling speed changes with glasses of different materials?
b) The glass material influences the cooling rate
c) temperatures initial, final and the time
d) the control variable is time
e)temperature of the beverage heated in a given time
f) best material for insulation was expanded
Explanation:
This is a problem of how to formulate an experiment using the scientific method
a) a question for this problem to follow.
How the cooling speed changes with glasses of different materials?
b) the hypothesis of the experiment is:
The glass material influences the cooling rate
c) we have the independent variable that the experimenter controls
the material of the glass, the initial temperature of the drink and the cooling time
the dependent variable is the one that is measured
the temperature of the drink and the time
d) the control variable is time
e) the evidence would be the temperature of the beverage heated in a given time
f) When conducting the experiment, the thermal conductivity of the material is the most important factor, the one with the lowest thermal conductivity is the one that keeps the drinks longer
in general, the conductivity ends of paper 0.24 W/m K and that of plastic is 0.06 W / m K, of expanded 0.03 W / m K
From these values it is experienced that the best material for insulation was expanded
Calculate the average induced voltage between the tips of the wings of an airplane flying above East Lansing at a speed of 885 km/h. The wingspan of the airplane is 50.4 m, the vertical component of the Earth's magnetic field is 6.90×10-5 T.
Answers
Answer:
=0.855V
Explanation:
The induced voltage can be calculated using below expression
E =B x dA/dt
Where dA/dt = area
B= magnetic field = 6.90×10-5 T.
We were given speed of 885 km/h but we will need to convert to m/s for consistency of unit
speed = 885 km/h
speed = 885 x 10^3 m/hr
speed = 885 x 10^3/60 x60 m/s
speed = 245.8 m/s
If The aircraft wing sweep out" an area
at t= 50.4seconds then we have;
dA/dt = 50.4 x 245.8
= 123388.32m^2/s
Then from the expression above
E =B x dA/dt substitute the values of each parameters, we have
E = 6.90 x 10^-5 x 12388.32 V
E =0.855V
Hence, the average induced voltage between the tips of the wings is =0.855V
What are the main differences between asexual reproduction and sexual reproduction?
Asexual reproduction requires two parents and produces non-identical offspring, while sexual reproduction requires only one parent and produces identical offspring.
Asexual reproduction requires two parents and produces identical offspring, while sexual reproduction requires only one parent and produces non-identical offspring.
Asexual reproduction requires only one parent and produces identical offspring, while sexual reproduction requires two parents and produces non-identical offspring.
Asexual reproduction requires only one parent and produces non-identical offspring, while sexual reproduction requires two parents and produces identical offspring.
Answers
Answer:
option c
Asexual reproduction requires only one parent and produces identical offspring, while sexual reproduction requires two parents and produces non-identical offspring.
Answer:
C
Explanation:
The displacement-time graph below represents the motion of a chart initially moving forward along a straight line.During which interval is the cart moving forward at a constant speed
AB
BC
CD
DE
Answers
The uniform motion ratios allow finding which intervals have constant velocity, the correct answers are
BC Positive velocity
CD Zero speed
DE Negative velocity
Kinematics studies the movement of bodies, establishing relationships between position, velocity and acceleration. In the special case that the acceleration is zero the motion is called uniform movement
v = [tex]\frac{\Delta_x}{\Delta t}[/tex]
Δx = v Δt
Where v is average velocity, Δx is the position variation and Δt is the time variation in the analyzed interval.
This equation we see that the relationship between displacement and time is linear, let's analyze each interval given in the graph
AB interval
In this interval the graph shows a curve whereby the movement is accelerated
BC interval
In this interval the graph is a line with a positive slope, therefore the movement is uniform with positive velocity
CD interval
In this part we have a line of zero slope
In motion it is uniform with zero speed, that is, the car is stopped
DE interval
The graph of this section is a line with a negative slope, consequently the velocity is negative.
With this analysis we see that the only interval that the movement is accelerated is the AB interval
In conclusion, using the uniform motion relationships we can find that intervals have constant velocity, the correct answers are
BC Positive velocity
CD Zero speed
DE Negative velocity
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A scientist claims that a certain chemical will make fabric waterproof. Which
option describes a controlled experiment that will produce evidence that will
support or refute her claim?
A. Two groups of fabric are treated with the chemical. One group is
cotton and the other is polyester. Then each group is exposed to
water.
B. One group of fabric is treated with the chemical, and the other
group is not. Then each group is exposed to water.
C. One group of fabric is treated with a small amount of the
chemical, and the other group is treated with a large amount. Then
each group is exposed to water.
O D. Two groups of fabric are treated with the chemical. Then one
group is exposed to a small amount of water, and the other group
is exposed to a large amount.
Answers
Answer:
B. One group of fabric is treated with the chemical, and the other group is not. Then each group is exposed to water.
Explanation:
Select the correct answer from each drop-down menu.
What causes atoms to form covalent bonds?
The number of
In a covalent bond, two atoms are held together by the attraction between
covalent bonds that an atom can form depends on the number of
in the atom.
Answers
Answer:
YES the first option
Explanation:
two atom are held together
Answer:
In a covalent bond, two atoms are held together by the attraction between each atom and the shared electrons. The number of covalent bonds that an atom can form depends on the number of valence electrons in the atom.
A 30 N net force on a skater produces an acceleration of 0.6 m/s2 . What is the mass of the skater?
Answers
30 N = 0.6 m/s^2 * M
M = 30 * 0.6 = 50
This sounds wrong-
The mass of the Skater is 50 Kg.
We have a skater who is under the influence of 30 Newton of force.
We have to determine the mass of skater.
State Newton's Second law of Motion ?Newton's second law of motion states that the rate of change of momentum is directly proportional to the force applied. Mathematically-
[tex]$F\;\alpha \; \frac{dp}{dt}[/tex]
According to the question, we have -
Force on Skater - 30 N
Acceleration Produced - 0.6 [tex]m/s^{2}[/tex]
We know -
F = ma
30 = m x 0.6
m = 30/0.6 = 50 Kg
Hence, the mass of the Skater is 50 Kg
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A block of mass 3 kg is pushed 1 m along a frictionless horizontal table by a constant 16 N force directed 34◦ below the horizontal. Determine the work done by the applied force. Answer in units of J.
please help i'm a struggling physics student. Thanks so much!
Answers
Answer:
W = 13.26 [J]
Explanation:
Work in physics is defined as the product of force by the distance traveled by the object.
It is important to clarify that the force should be parallel to the direction of movement. In this way, we have to decompose the force into the X component of the movement.
Fx = 16*cos(34) = 13.26 [N]
W = F*d
where:
F = force = 13.26 [N]
d = distance = 1 [m]
W = 13.26*1
W = 13.26 [J]
Answer:
the guy above me is correct
Explanation:
What is mass and the temperature ?
Answers
Answer:
Mass is a measure of the amount of matter in an object.
A measure of the warmth or coldness of an object or substance with reference to some standard value.
Explanation:
If two objects have the same mass, the object with the higher temperature has greater thermal energy. Temperature affects thermal energy, but temperature isn't the same thing as thermal energy. That's because an object's mass also affects its thermal energy.
Answer:
Explanation:
Mass is a measurement of how much matter is in an object. Mass is a combination of the total number of atoms, the density of the atoms, and the type of atoms in an object. Mass is usually measured in kilograms which is abbreviated as kg. In physics there are different ways of determining the quantity of mass
Temperature definition, a measure of the warmth or coldness of an object or substance with reference to some standard value. The temperature of two systems is the same when the systems are in thermal equilibrium.
A compressed spring does not have elastic potential energy.
O True
O False.
help please
Answers
Answer:
False
Explanation:
The second you let go its gonna release kinetic energy that's why it's potential
3. A ball rolls along the floor with a constant velocity of 12 m/s. How far will it have gone
after 6 seconds?
Answers
Answer:
the answer is 49 ms do yeah
Answer:
72
Explanation:
hehe
Which device consists of two separate coils of wire wrapped around an iron
ring?
O A. A transformer
B. A generator
C. A motor
D. A commutator
Answers
Answer:
It would be transformer
Explanation:
hope this helped
Answer:
transformer
Explanation:
got it right
does anyone know the answer ?
Answers
Answer:
it is 2 and 3 trust me I gotcha
EARTH SPACE SCIENCE.
I NEED HELP ASAP DUE TODAY. PLEASE 20 POINTS
Using the topographic map above, match the description to the letter that it represents.
Highest point on the map-
[ Select ]
Stream flowing to the East-
[ Select ]
Letter near the steepest slope-
[ Select ]
Letter near the flattest area-
[ Select ]
Stream flowing to the North- F
Answers
Answer:
c,e,f,d
Explanation:
can someone pls help me with this?
Answers
HEY GUYS IS THIS TRUE OR FALSE????????
Answers
an atom's nucleus contains three protons and three neutrons what is the overall charge of the nucleus
Answers
Answer:
Positive
Explanation:
Because there is no electrons.
If a force of 12 N is applied to an object
and it accelerates 4 m/s2, what is the
mass of the object?
Answers
Answer:
The answer is 3 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
From the question we have
[tex]m = \frac{12}{4} \\ [/tex]
We have the final answer as
3 kgHope this helps you
By studying ____________________ scientists have learned about the layers of the Earth.
Answers
Answer: By studying seismic waves scientists have learned about the layers of the Earth.
Here is the parallelogram rule in the file attached... Can someone please explain why the resultant force of these 2 vectors (30 N and 40 N) is 60 N? I know it's with an angle at 26ºC to the horizontal, so it wouldn't be 50 N. So how do you find this? How do you calculate the vectors when they are not straight lines shown. If someone is using this for an advantage of points, I'll report you. Thanks in advance :)
Answers
9514 1404 393
Answer:
sum the components, orsolve the triangleExplanation:
The most straightforward way to compute the resultant of two vectors is to add their x- and y- components. In the attached, we have labeled the 30 N force "B" and the 40 N force "A". Their respective (x, y) components are ...
A = 40(cos(0°), sin(0°)) = (40, 0)
B = 30(cos(62.72°), sin(62.72°)) = (13.75, 26.66)
Then the components of the resultant are ...
R = A + B = (40, 0) +(13.75, 26.66) = (53.75, 26.66)
Its magnitude is found from the Pythagorean theorem:
|R| = √(53.75² +26.66²) = 60.00
Its direction is found from the components using the arctangent function:
∠R = arctan(26.66/53.75) = 26.38°
In a sort of shorthand notation, ...
R = 60.0∠26.4°
__
Alternate solution
In order to perform the above calculation, you need to know the angle between the vectors. The other angle in the parallelogram is the supplement of this. So, you can find the resultant by solving the triangle OAR, where O is the origin. Angle A in that triangle will be 180° -62.72° = 117.28°. This gives you enough information to use the Law of Cosines.
OR² = OA² +AR² -2(OA)(AR)cos(A)
OR² = 40² +30² -2·40·30·cos(117.28°) ≈ 3600.0
|R| = √3600 = 60
Then you can find the angle AOR using the law of sines.
sin(AOR)/30 = sin(117.28°)/60
∠AOR = arcsin(sin(117.28°)/2) = 26.38°
So, you now know ...
R = 60.0∠26.4°
What task requires the most work, lifting a 12-kg sack 2 meters or lifting a 25-kg sack 1 meter?
a.) the 12-kg sack
b.) the 25-kg sack
c.) Both require the same amount of work.
d.) Impossible to determine without knowing the contents of the sack
Please answer ASAP!! Thank you!!
Answers
Multiply the masses by the respective distances:
(12 kg) (2 m) = 24 J
(25 kg) (1 m) = 25 J
so the heavier bag takes more work to lift, and (b) is the answer.
(d) is technically correct if the sacks are carrying different contents whose masses are not equal, but since we don't know what's inside each sack, assume 12 kg and 25 kg are the masses of each sack *and* their contents.