Answer:
The pressure inside the dropper is same as the atmospheric pressure when the rubber bulb is not pressed. ... But when we press the rubber bulb the pressure inside the dropper increases and hence the water flows out. Atmospheric pressure acting from outside the dropper balances the pressure exerted by water and water does not come out of a dropper. On pressing the dropper inside pressure of water becomes more than outside atmospheric pressure and water run out. When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper.
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Two forces P and Q acting at a point at an angle have their resultant
(2n + 1)√P2 + Q2 and when at an angle (90° - ),the resultant is(2n - 1)√P2 + Q2.
Show that tan = (n - 1)/( n + 1).
Answer:
Answer is given in this paper.
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A mother finds her daughter’s mug of hot cocoa on a table an hour after she had been drinking it. As the mother pours out the cocoa, she sees brown solids in the bottom of the mug. How can this be explained?(1 point)
The cocoa was mixed with hot water, but some cocoa settled as it cooled because the solubility went up.
All dissolved substances will come out of solution over time. If the mother waits long enough, then all of the powder will appear at the bottom of the mug.
The cocoa was mixed with hot water, but some cocoa settled as it cooled because the solubility went down.
This would only happen if too much cocoa powder was added in the first place, because the solubility should not change.
Answer:
The cocoa was mixed with hot water, but some cocoa settled as it cooled because the solubility went down.
Answer:
C
Explanation:
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Answer:
In plotting position versus time it can be seen that the green line represents a fixed position at the various times given - the other lines represent changing position with time
The (horizontal) green line describes an object that's not moving.
Whatever TIME you pick to look at the green line, its POSITION is always the same. This is a pretty good description of "not moving".
The other three lines all have different positions at different times, so they all describe motion.
Does the following word describe a theory, law, or both
“Complex”
A) LAW
B) THEORY
C) BOTH THEORY AND LAW
Answer:
the answer is b: theory
Explanation:
in science theory can be defined as a scientific idea that uses logic based on wisdom, research, observation, and experience
how many seconds are there in 1 day . solve along with steps
One minute has 60 seconds, One hour has 60 minutes and one day has 24 hours. Thus, 80 x 60 x 24 = 86,400 sec
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Answer:
[tex]thank \: you[/tex]
What's Centripetal force................
Answer:
a force that acts on a body moving in a circular path and is directed towards the centre around which the body is moving.
Answer:
A centripetal force is a force that makes a body follow a curved path. Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path.
Math is used in the sciences because (1 point)
A numbers are the best way to understand scientific ideas.
B it is a universal means of communicating scientific information.
C scientific data is quantitative.
D scientific data requires significant figures.
Which option is the appropriate scientific unit for distance?
A) Foot
B) meter
C) mile
D) yard
Which tools do investigations in Earth and space science use?
A) computer and field
B) internet and laboratory
C) computer, laboratory and field
D) computer, internet, laboratory, and field
Answer:
1. it is universal means of communicating scientific information
2. meter
3. computer, internet, laboratory, and field
While swimming a person pushes water backward, why?
Answer:
THIS DUE TO THE THIRD LAW OF MOTION.
AS WE PUSH WATER BACKWARD THE WATER WITH SAME FORCE BUT EQUAL DIRECTION PUSHES US SO WE GO IN FORWARD DIRECTION.
Explanation:
While swimming a person pushes water backward because the pushing action create reaction due to which we move forward while swimming.
Convert the following as instructed:
i.340 cm into m
ii.67 kg into g
iii.2 days into second
iv.86400 second into day
Between which types of elements do ionic bonds occur, and how do electrons act within the bond?(1 point)
nonmetals and nonmetals, electrons shared
metals and nonmetals, electrons transferred
metals and metals, electrons freely moving
nonmetals and metals, electrons shared
Answer:
Im pretty sure that its, the metals and nonmetals, electrons transferred.
Between metals and nonmetals, types of elements do ionic bonds occur, and electrons transferred within the bond,therefore the correct answer is option B.
What is an ionic bond?When two similar or dissimilar atoms form bonds with each other by transferring their valence electron the bond is known as the ionic bond.
The ionic bond is the result of the transfer of the electrons
Ionic bonds are formed between the pair of one electronegative atom and an electropositive atom.
Ionic, covalent, and hydrogen bonds are the three basic types of chemical bonds that are used to generate these chemical compounds from their component atoms.
Ionic bonds are created when electrons are transferred between two bond-forming pairs that can be distinguished by their electronegativity.
Thus, Between metals and nonmetals, types of elements do ionic bonds occur, and electrons are transferred within the bond, therefore the correct answer is option B
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im offering 100 point to whoever can give me the best advice on boys you possible can. so shoot, tell me everything and anything about it.
???????.............please help:)
Answer:
It is:
0.00477
0.00000301
what is the acceleration of a car that goes from 4m/s to 8m/s in 2s use the guess method
Answer:
12m/3s is the answer I hope its right...If a body is dropped from the same height once in the equator and then in polar region in which place will it fall faster? why
Explanation:
equator.
because the "belly" of the Earth around the equator makes the Earth there thicker than from pole to pole.
the reason is the spinning of our planet. as the spinning speed is the fastest at the thickest part of a ball (at the equator), that ball has the tendency due to the centrifugal force to extend even further there, and the extra material for that is being pulled in from the poles.
therefore, the diameter through the Earth from equator to equator is larger than the diameter from pole to pole.
and that means that there is more mass from equator to equator than from pole to pole.
and that means that gravity is stronger at the equator.
therefore, a body will fall faster at the equator than on a pole.
Write an ecosystem report on rain.
Answer:
Explanation:
kopkpo
The airplane refuels between City A and continues on to City B. It travels at an average speed of 733.9 km/h. If the trip takes 2.4 hours, what is the flight distance between City A and City B? Answer in km
Answer:
733.9× 2.4
1761.36
Explanation:
The airplane refuels between city A and continues on to city B. It travels at an average speed of 733.9km/h. If the trip takes 2.4 hours, what is the flight distance between city A and city B?
Which structure defines the sulfhydryl functional group?(1 point)
SOH
OH
SH
SH2
Answer:
the correct answer is
"SH"
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The sulfhydryl functional group is shown by -SH.
The sulfhydryl functional group is known by several other names such as; thiol, mercapto or sulfanyl.
The sulfhydryl functional group has the structure -SH. The sulphur atom bears two lone pairs which is also important in studying the chemistry of this functional group.
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A tall tree has more chance to break during storm why
Answer:
yes
Explanation:
because the strong winds and the weight and there are more things to break
Explanation:
A tall tree may have more resistance to the wind since it has more mass ( branches, leaves). That means the wind has more mass to push against. Winds may also be stronger at a higher level. Tall trees have been growing longer and have more chances to have been compromised by insects, animals, fungi and so on. They also have less flexibility since they need to be more rigid to hold up the mass of branches they have.
A car has steady speed of 8 m/s .How far
does the car travel in 8s
Answer:
Explanation:
Distance traveled = steady speed * time duration = 8m/sec * 8 sec = 64 meters
Answer:
64 m
Explanation:
Multiply 8 m by 8.
Which statement describes the relationship between bond strength and the melting and boiling points of a substance? A. As the force between the particles increases, the melting and boiling points also increase. O B. As the force between the particles increases, the melting point decreases and the boiling point increases. O C. As the force between the particles increases, the melting and boiling points decrease. O D. As the force between the particles increases, the melting point increases and the boiling point decreases. SUBMIT
Answer:
a
Explanation:
Someone please help me!! See PDF to help
Answer:
They are invisible!
Explanation:
Explanation:
They are invisible is the answer.
Explain one rule of Ultimate Frisbee.
Explanation:
The object of Ultimate Frisbee is to gain points by scoring goals. The disc may only be passed, and a goal is scored when a player successfully passes the disc to a teammate in the end zone which that team is attacking. The team with the most points at the end of the game is declared the winner.
Can aurora be found in other planets?
Answer:
Yes
Explanation:
Any planet with a sufficiently dense atmosphere that lies in the path of the solar wind will have aurora. It has been discoveres in planets like Jupiter, Saturn, etc.
Answer:
yes
Explanation:
A charge feels a 7.89 x 10-7 N force when it moves 2090 m/s at a 29.4° angle to a 4.23 x 10-3 T magnetic field. What is the amount of the charge?
We have that the amount of the charge q is
[tex]q=1.8*10^{-7}[/tex]
From the Question we are told that
Force [tex]F=7.89 x*10^{-7}[/tex]
Velocity [tex]V=2090m/s[/tex]
Angle [tex]\theta=29.4[/tex]
Magnetic field [tex]B=4.23 * 10^{-3} T[/tex]
Generally, the equation for Force F is mathematically given by
[tex]F=qVBsin\theta\\\\q=\frac{F}{VBsin\theta}[/tex]
[tex]q=\frac{7.89 x*10^{-7}}{4.23 * 10^{-3} T*sin29.4*2090m/s}[/tex]
[tex]q=1.8*10^{-7}[/tex]
In conclusion
The amount of the charge q is
[tex]q=1.8*10^{-7}[/tex]
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From the question, the given charge moving within the magnetic field would have a value of 1.82 x [tex]10^{-7}[/tex] C.
A charge is either a positively or negatively charged particle. When a charge is moving through a magnetic field, it would experience a force which depends on the amount of the charge, its speed, the magnetic field strength and angle. The force on a charge in a magnetic field can be determined by:
F = qvBSin θ
where: q is the charge, v is its velocity/ speed in the field and θ is the angle of deflection of the charge.
Given that: F = 7.89 x [tex]10^{-7}[/tex] N, v = 2090 m/s, B = 4.23 x [tex]10^{-3}[/tex] T and θ = 29.4°.
Thus, the amount of the charge can be determined by;
q = [tex]\frac{F}{vBsin O}[/tex]
= [tex]\frac{7.89*10^{-7} }{2090*4.23*10^{-3}* Sin 29.4 }[/tex]
= [tex]\frac{7.89*10^{-7} }{4.340}[/tex]
q = 1.818 x [tex]10^{-7}[/tex]
q = 1.82 x [tex]10^{-7}[/tex] C
Therefore, the amount of the charge that moved within the magnetic field is 1.82 x [tex]10^{-7}[/tex] C.
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Different between Atmosphereric Pressure and Liquid Pressure.
Answer:
Air pressure or atmospheric pressure is the pressure as the force exerted by the collisions of particles in the air. The key difference between air pressure and liquid pressure is that air pressure allows the gaseous state of matter to be compressible, whereas liquid pressure makes a liquid incompressible
Explanation:
Air pressure or atmospheric pressure is the pressure as the force exerted by the collisions of particles in the air. The key difference between air pressure and liquid pressure is that air pressure allows the gaseous state of matter to be compressible, whereas liquid pressure makes a liquid incompressible
It takes Serina 0.25 hours to drive to school. Her route is 16 km long. What is Serina’s average speed on her drive to school?
Answer:
[tex]velocity = \frac{speed}{time} \\ = \frac{16}{.25} \\ \frac{16}{ \frac{1}{4} }(.25 = \frac{1}{4}) \\ 16 \times 4 = 64 km/hour\\ thank \: you[/tex]
A car drives around the block 400m. What is the distance ?
0 40000m
4 m
400m
O 0.4 m
The distance traveled by the car will be equal to 400 m.
The given parameter
distance round the block, d = 400 m
To find:
the distance traveled by a car round the blockTo travel round the block means that the car will complete a distance equal to the distance round the block.
distance round the block = distance traveled by the car = 400 mThus, the distance traveled by the car will be equal to 400 m, since this is equivalent to the distance round the block.
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Can someone tell me which is which on what i put i dont know what i should put
In which group of elements does tellurium (Te) belong?
(1 point)
alkali metals
metalloids
lanthanides
transition metals
Answer:
metalloids
Explanation:
Periodic Table
A Periodic table is an arrangement of chemical elements in order of increasing atomic number.
Metalloids: Metalloids have properties that are midway between metals and non metals
Tellurium is a chemical element with symbol Te and atomic number 52. Classified as a metalloid, tellurium is a solid at room temperature.
Properties
Atomic Mass
127.6u
Oxidation States
+6, +4, -2
Year Discovered
1782
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0.054x2.33x90............
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