Can someone please answer this, ill give you brainliest Would be very appreciated.
Answers
Answer:
C. Surface tension
What property of water allowed the paperclip to stay on the top of the water?
Solution:Surface Tension
Explanation:The strong surface tension enables the paper clip float on the water, despite its much higher density which is caused by the cohesive forces between liquid molecules.
Related Questions
Which electromagnetic has the shortest wavelength?.
Answers
Answer:
Gamma rays
Explanation:
How can your physical health change with cardio activity? explain why.
Answers
Answer:
Other benefits include:
Increases blood flow and decreases chances of stroke.Improves memory and thinking ability.Combats decline in brain functioning with age.Helps protect against developing Alzheimer's disease.Fights osteoporosis and reduces chances for a hip fracture.Regular physical activity is one of the most important things you can do for your health. Being physically active can improve your brain health, help manage weight, reduce the risk of disease, strengthen bones and muscles, and improve your ability to do everyday activities.
Adults who sit less and do any amount of moderate-to-vigorous physical activity gain some health benefits. Only a few lifestyle choices have as large an impact on your health as physical activity.
Everyone can experience the health benefits of physical activity – age, abilities, ethnicity, shape, or size do not matter.
a bus velocity 20m/s towards the east and another bus has velocity 15m/s in west direction.if they start to move from a point simultaneously.what distance do they cover in 2 minutes. what will be their separation.
Answers
Answer:
Velocity towards east = 20m/s
Distance in 2 min(120 sec) = 20 x 120= 2400m = 2km
Velocity towards west = 15m/s
Distance in 2 min(120 sec) = 15 x 120 = 1800m = 1.8km
Separation= 2+1.8 = 3.8km
Explanation:
Hope it helps you:))))))
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Why is nuclear energy able to be used for practical purposes? the reactions are controlled to regulate energy output. the reactions are uncontrolled for maximum energy output. all of the products are fed back into the reaction to keep it going. all of the products are immediately removed to inhibit more reactions.
Answers
Nuclear energy is is used practically for many energy requirements because the reactions are controlled to regulate energy output
What is nuclear energy?Nuclear energy is the energy reaelesed during nuclear relations.
Nuclear energy is a clean form of energy which is available in enormous amounts.
Nuclear energy is is used practically for many energy requirements because the reactions are controlled to regulate energy output.
Therefore, the control of nuclear reactions make the use if nuclear energy possible.
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Answer: A or the reactions are controlled to regulate energy output.
Explanation: did it on edge!
Why is calcium chloride an ionic bond
Answers
Answer:
lonic compounds generally form between elements that are metals and elements that are nonmetals. For example, the metal calcium (Ca) and the nonmetal chlorine (Cl) form the ionic compound calcium chloride (CaCl2). In this compound, there are two negative chloride ions for each positive calcium ion.
Explanation:
Answer:Ionic compounds generally form between elements that are metals and elements that are nonmetals. For example, the metal calcium (Ca) and the nonmetal chlorine (Cl) form the ionic compound calcium chloride (CaCl2). In this compound, there are two negative chloride ions for each positive calcium ion.
Explanation:
1. Endorphins
2. Cardiovascular
3. Endurance
4. Muscular
5. Aerobic
chemicals your brain releases when you exercise
the ability to last a long time without tiring
using your heart, lungs and blood vessels
using oxygen
using your muscles
can u help me match them
Answers
endurance - ability to last a long time training
cardiovascular- using ur heart lungs blood vessels
using oxygen - aerobic
using muscle - muscular
An ammeter is a device that measures _____.
the type of charge on a resistor
the current through a resistor
the voltage across a resistor
the potential of the battery
Answers
what is the reading of this vernier scale
Answers
Answer:
perturbateur ( le temps, le lieu, les personnages[description], la victime, l'enqueteur )
les peripeties
le denouement
would you consider caffeine to be more or less toxic then arsenic explain
Answers
When blue light shines into a prism what happens?
Answers
Answer:
Blue light has the shortest wavelength amongst all the colours that combine to make white light. This means the blue light diffracts (bends) the most out of all of them. There will be no dispersion of colours because ideally, the blue light must consist of only one frequency.
When a potassium atom forms an ion, it loses one electron. what is the electrical charge of the potassium ion? −2 −1 1 2
Answers
The electrical charge of a Pottasium ion that loses one electron is +1. Details about charge of an ion can be found below.
How is the charge of an ion formed?An ion is an electrically charged atom. This charge is formed as a result of the difference between the number of protons and electrons in that atom.
According to this question, a potassium atom forms an ion by losing one electron. This means there will be one more proton than electron in the element.
Therefore, the electrical charge of a pottasium ion that loses one electron is +1.
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A car of mass 800 kg travels over a hill of height h. By travelling to the top of the hill, the car gains 40000 J of gravitational potential energy. The gravitational field strength g is 10 N /kg
Answers
[tex] \sf\huge{\underline{\underline{\overbrace{Answer}}}} [/tex]
The height of the hill is 5m.
Explanation:
Given :-⠀
Mass of the car (m) = 800kg
Height of the hill (h) = ?
Gravitational field strength (g) = 10N/kg
Potential energy (P.E.) = 40,000J
⠀
To find :-⠀
The height of the hill
⠀
Solution :-⠀
▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃
⠀⠀⠀ ⠀⠀■ NoteThe gravitational potential energy is the energy acquired by the object when the mass of the object is under the gravitational pull of the earth. It is directly proportional to mass and height of the object. If the mass or the height of the object increases the potential energy also increases.
⠀
⠀⠀⠀⠀⠀□ ExampleIf we keep a book on the table and if we push the book from the table. This will result in the falling of the book on ground due to gravitational pull of the earth of it's mass and height.
▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃
⠀
⠀
While formula to find potential energy is
⠀
[tex] \tt{\Large {P.E. = mg}}h[/tex]
But we need to find 'h'
so the formula for 'h' will be
⠀
[tex] \bold{\Large {h = \frac{P.E. }{mg} }}[/tex]
▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃
⠀
⠀
Now substituting the required values.
⠀
[tex] \sf \hookrightarrow h = \frac{40000}{800 \times 10} \\ \\ \\ \sf \hookrightarrow h = \frac{40 \cancel 0 \cancel 0 \cancel 0}{8 \cancel 0 \cancel 0 \times \cancel{10}} \\ \\ \\ \sf \hookrightarrow h = \frac{ \cancel{ 40} \: \:{ \small{5}}}{ \cancel 8} \\ \\ \\ \boxed {\hookrightarrow h = 5m}[/tex]
Light travels at 3.0 × 108 m/s in a vacuum
(about the same in air) - how many km/h is
this?
Answers
We've got m/s, which is value of distance ÷ time
(distance/time)
3 x 10^8 is:
300,000,000m/s
1km = 1000m
1hr = 3600secs
So, divide 300,000,000m by 1000 to get in km & you get:
300,000km
Now divide this value by 3600 seconds to get it in km/hr
300,000km/3600 = 83.33333333
Thus, answer is 83.3km/h
Or
8.33 x 10^1 km/h (in standard form)
(doing 83.3 recurring multipled by 1000 & 3600 gets you back to original answer. So, 83.33333...x1000x3600= 300,000,000)
Hope this helps!
What are challenges faced by both modern and ancient engineers?
Answers
Answer:
Climate Chrises
Explanation:
A glass rod with yellow crosses on it touches a sheet of silk covered with negative signs on it. the sheet of silk is sticking to the glass rod in several places. use the drop-down menu to answer the question. a student is going to produce static charge in a glass rod by rubbing it with a piece of silk. which method of transferring charge does this image illustrate?
Answers
The image as shown here can here can be used to describe charging by induction.
What is a charge?A charge may be positive or negative. One of the methods of transferring a charge is by induction.
In this case, an objects induces an opposite charge on a material. The image as shown here can here can be used to describe charging by induction.
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Answer:
friction
Explanation:
Which answer correctly describes the grey lines in this Hering illusion? (Optical Illusions Lesson)
A close-up of a fanDescription automatically generated with low confidence
Question 1 options:
The grey lines are bent.
The grey lines are straight.
The grey lines are curly.
The grey lines are a figment of my imagination.
Answers
Answer: The grey lines are bent.
Explanation: The grey lines are bent.
The answer that correctly describes the grey lines in this Hering illusion is "The grey lines are bent." Option A. This is further explained below
What is the Hering illusion?The Hering Illusion is one of several illusions in which a major component of a basic line picture is obscured.
In conclusion, The statement for the grey lines in this Hering illusion is "The grey lines are twisted.".
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In a tug of war, team A is pulling the rope with a force of 60N towards the right and team B also applies 60N towards the left, what is the net force?
Answers
Answer:
[tex]f_n_e_t=0[/tex]
Explanation:
[tex]f_1+f_2=f_n_e_t[/tex]
because there are two different forces in different directions (left: negative, right: positive, down: negative, up: positive) so 60N left will be negative, and 60N right will be positive:
[tex]60+(-60)=0[/tex]
when two same forces apllied then the net force is zero.
Which event in the history of black holes happened after Einstein's theory of general
relativity was published in 1915?
A: John Michell coined the term “black holes.”
B: Pierre-Simon de Laplace mentioned the idea of black holes in a written work.
C: Karl Schwarzschild correctly analyzed the relationship between the size of a black hole and its mass.
D: John Wheeler concluded that if black holes did exist, light could not escape them.
Answers
Answer:
C: Karl Schwarzschild correctly analyzed the relationship between the size of a black hole and its mass.
Explanation:
Karl Schwarzschild correctly analyzed the relationship between the size of a black hole and its mass. The correct option is C.
What is Karl Schwarzschild's theory?A black hole is an area of spacetime in which gravity is so powerful that nothing, not even light or other electromagnetic waves, can escape. According to general relativity theory, a sufficiently compact mass can bend spacetime to generate a black hole.
Karl Schwarzschild, a German physicist, was the first to "find" black holes. In 1915, he proposed a general relativity solution that was applicable to the simple (i.e., nonrotating, uncharged, and boring) example of a perfectly spherical object contained in otherwise empty space.
These suggestions are now known as the Schwarzschild radius and the singularity. Every item is allocated a Schwarzschild radius, which is determined by the object's mass. Gravity's behaviour begins to become strange within this radius.
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What can you say about the effort force needed to lift an object using an ideal lever with a force advantage greater than 1?
Select one:
a. The effort force is the same as the lifting force.
b. The effort force is less than the lifting force.
c. The effort force is greater than the lifting force.
d. You have to use the formula to calculate the effort force.
Answers
When the effort force needed to lift an object using an ideal lever with a force advantage greater than 1, The effort force is less than the lifting force. The correct option is b.
What is force advantage?Force is the mechanical physical quantity. The force advantage is equivalent to the mechanical advantage equal to the ratio of output to the input force.
The force advantage is
F.A = lifting force / effort force
When the effort force is greater, FA is less than 1. When FA is greater than 1, definitely, the effort force is less.
Thus, the effort force is less than the lifting force. The correct option is b.
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Which of the following summarizes cellular respiration?
Oxygen reacts with glucose to produce carbon dioxide and water, and release energy.
Light energy is changed into chemical energy.
Light energy is used to join water and carbon dioxide to make oxygen and glucose.
Chemical energy is changed into light energy.
Answers
The statement which summarizes cellular respiration is Oxygen reacts with glucose to produce carbon dioxide and water, and release energy.
What is cellular respiration?Cellular respiration is the process by which food, in the form of glucose is transformed into energy within cells.
The food is prepared by the plants by the process of photosynthesis in presence of sunlight. This food is in the form of glucose.
The respiration of plants is done by breaking of glucose by absorbing oxygen. This produces carbon- di- oxide and water along with the release of energy.
Thus, the cellular respiration is oxygen reacts with glucose to produce carbon dioxide and water, and release energy.
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The force of gravity on an object varies directly with its mass. The constant of variation due to gravity is 32. 2 feet per second squared. Which equation represents F, the force on an object due to gravity according to m, the object’s mass? F = 16. 1m F = F equals StartFraction 16. 1 Over m squared EndFraction. F = 32. 2m F = F equals StartFraction 32. 2 Over m squared EndFraction.
Answers
Answer:
F = 32.2 m
Explanation:
F = ma
F = m * 32.2
If the scientific method was not used in forensic science at all, what do you think some potential problems could be?
Answers
A pendulum is lifted to a height of 0.75 m. the mass of the bob is 0.2 kg. calculate the gpe at the top of the pendulum
Answers
GPE = 1.4715
Which of these is described as force per unit charge on a positive test charge?
OA test charge
OB. source charge
OC. electric force
OD. electric field
OE electric current
Help!
Answers
Answer:
Sorry if im late
The answer is Electric field (D)
Explanation:
The electric field is thought of as the force per unit positive charge that can be exerted before the field is disturbed by the presence of a test charge.
hope this still helped :)
~rere
Answer:D
Explanation:
I have answer key
How long does it take to produce a star?
Answers
Answer: From the moment the first gas cloud begins to compress until the star is formed and glows like the Sun, the process of star creation takes around a million years. Planets and other objects circle the central star using the remaining material from the star's formation.
Explanation:
Answer: Before the gas could disengage from the magnetic field and collapse, every ion in the gas would need to locate an electron to neutralize it. This implies that the formation of a star takes more than 10 million years.
Explanation:
What is the surface area for a rectangular prism with the height of 6 inches, width of 8 inches, and the length of 4 inches
Answers
Answer:
208 is the surface area!
Explanation:
Hope this helps! ;-)
If the students shake their slinky so that the frequency of the waves they generate decreases, what will happen to the wavelength of the slinky
Answers
Read this article discussing the amount of time that people of various ages and education levels report spending on different technologies. Ask at least 12 of your adult friends and family members the same survey question. (The more people you ask, the better.) How do your survey results compare with the results in the article? What are some possible reasons your results might be different? When comparing the results, be sure to take into account the margin of error for the survey discussed in the article
Answers
The article is not found here but surveys are important because they are representative samples of a population.
What is a survey?A survey is a useful tool based on population samples, which is used to make statistical analyses in a given investigation.
Differences in surveys are generally due to small sample sizes, which may lead to errors in the analysis of data.
In conclusion, the article is not found here but surveys are important because they are representative samples of a population.
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Emotional elevation only occurs in animal kin groups. please select the best answer from the choices provided t f
Answers
Emotional elevation can occur in individuals or in groups, therefore, it is false that emotional elevation only occurs in animal kin groups.
What is emotional elevation?Emotional elevation is the process whereby the moods of individuals are elevated due to their interactions with others or due to other factors.
Emotional elevation can occurs in individual animals or those on animal kin groups.
Therefore, it is false that emotional elevation only occurs in animal kin groups.
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Answer:
F
Explanation:
Calculate the molar mass of glucose
Answers
Let's calculate
[tex]\\ \rm\Rrightarrow C_6H_{12}O_6[/tex]
[tex]\\ \rm\Rrightarrow 6(12)+12(1)+6(16)[/tex]
[tex]\\ \rm\Rrightarrow 72+12+96[/tex]
[tex]\\ \rm\Rrightarrow 180g/mol[/tex]