Answer:
Explanation: Liquid–liquid extraction (LLE), also known as solvent extraction and partitioning, is a method to separate compounds or metal complexes, based on their relative solubilities in two different immiscible liquids, usually water (polar) and an organic solvent (non-polar).
8
The range of a target is found to be 20 km. A
shell leaves a gun with a velocity of 500 ms-'.
What must be the angle of elevation of the gun
if the ground is level?
How much heat is required to change 200 mL of ice at -22°C (at typical Freezer temperature) into steam
Answer:
611.064 kJ
Explanation:
Given :
m = 200 mL = 200 g
Specific heat of ice = 2.06 J/g°C
Q = mcΔt
Δt = 0 - (-22) = 22
Q1 = 200 * 2.06 * 22 = 9064 J
Q2 = Melt 0 °C solid ice into 0 °C liquid water:
Q2 = m · ΔHf ; ΔHf = heat of fusion of water = 334j/g
Q2 = 200 * 334 = 66800 J
Q3 : Heat to convert from 0°C to 100°C
Q3 = mcΔt ; c = 4.19 J/g°C ; Δt = (100 - 0) = 100
Q3 = 200 * 4.19 * 100 = 83800 J
Q4: heat required to boil water to steam
Q = m · ΔHv
Hv = heat of vaporization of water = 2257 J/g
Q4 = 200 * 2257 = 451400 J
Total Q = Q1 + Q2 + Q3 + Q4
Q = 9064 + 66800 + 83800 + 451400
Q = 611,064 Joules
Q = 611.064 kJ
Science project!!! For this assignment, you will ask questions about the factors that have caused a rise in global
temperatures over the past century. Then, you will conduct research to answer your questions. You will
also graph provided information, analyze the graphs, and make conclusions based on the graphs. Finally,
you will write a paper describing the conclusions of your research and graphs
My project is in the file attached, lots of thanks to Maxineishere for helping me with the essay. You may need adobe reader for this as the files are PDF files, I hope you are satisfied! :)
DATE ANSWERED: 5/8/2021
A white go-kart moving 5 m/s hits a red go-kart that is at rest. Both go-karts weigh 2 kilograms and the
white go-kart travels in the opposite direction at 2 m/s after the collision. What is the velocity of the red
go-kart after the collision?
A 10 m/s
7 m/s
5 m/s
o 2 m/s
Answer:
The velocity of the red go-kart after the collision is 3 m/s
Explanation:
Here the principle of conservation of momentum will be used.
Momentum of the system before collision = Momentum of the system after collision
Momentum of the system before collision [tex]= 2*5 + 2*0[/tex]
Momentum of the system after collision [tex]= 2 * 2 + 2 *x[/tex]
[tex]2*5 + 2*0[/tex] [tex]= 2 * 2 + 2 *x[/tex]
[tex]10-4 = 2 x\\6 = 2x\\x = 3[/tex]m/s
The velocity of the red go-kart after the collision is 3 m/s
A kangaroo has a maximum gravitational potential energy during one jump of 770 J
Helppppp
When the kangaroo lands on the ground 14% of the maximum gravitational potential energy is transferred to elastic potential energy in one tendon.The tendon has an unstretched length of 35.0 cm
When the kangaroo lands on the ground the tendon stretches to a length of 42.0 cm
Calculate the spring constant of the tendon.
[5 marks]
Show ur working out
Answer:
k = 44000 N/m
Explanation:
Given the following data;
Maximum gravitational potential energy = 770 J
Elastic potential energy = 14% of 770 J = 14/100 * 770 = 107.8 J
Extension, x = 42 - 35 = 7cm to meters = 7/100 = 0.07 m
To find the spring constant, k;
The elastic potential energy of an object is given by the formula;
[tex] E.P.E = \frac {1}{2}kx^{2}[/tex]
Substituting into the equation, we have;
[tex] 107.8 = \frac {1}{2}*k*0.07^{2}[/tex]
[tex] 107.8 = \frac {1}{2}*k*0.0049 [/tex]
Cross-multiplying, we have;
[tex] 215.6 = k*0.0049 [/tex]
[tex] k = \frac {215.6}{0.0049} [/tex]
k = 44000 N/m
The spring constant of the tendon is 44000 N/m.
The following can be depicted from the question:
Elastic potential energy will be:
= 14% × 770J = 107.80 Joule.
The spring constant will be calculated thus:
107.8 = 1/2 × k × 0.07²
107.8 = 0.5 × k × 0.0049
k = 215.6 / 0.0049
k = 44000 N/m.
Therefore, the spring constant of the tendon is 44000 N/m.
Read related link on:
https://brainly.com/question/21163545
A tow truck pulls a 1,100kg car and accelerates at a rate of 3 m/s2. What is the force of the tow truck
Answer:
3300 N
Explanation:
From the question given above, the following data were obtained:
Mass (m) = 1100 Kg
Acceleration (a) = 3 m/s²
Force (F) =?
Force is defined by the following equation:
Force (F) = mass (m) × acceleration (a)
F = m × a
With the above formula, we can obtain the force of the tow truck as follow:
Mass (m) = 1100 Kg
Acceleration (a) = 3 m/s²
Force (F) =?
F = m × a
F = 1100 × 3
F = 3300 N
Therefore, the force of the tow truck is 3300 N
What are some ways that humans depend on the ocean?
Answer:
A lot of the earth oxygen comes from the ocean around 50%-80%
Explanation:
Answer:
fishingswimming/entertainmentthe algae that gives us oxygenwater! It evaporates and gives us rainresearchExplanation:
Can some one pls answer them asapppp
A) Oil B) Wood C) 0.02J D) 3g E) Gas
In the nucleus ______________
tell cells what to do and how to change.
Answer:
i believe it is dna
Explanation:
if i remember correctly if the dna tells the cell what to do and how to do it
A high diver steps off a diving platform that is 10 meters above the water if no air resistance is present during the fall there will be a decrease in the divers what?
Answer:
Potential energy.
Explanation:
Potential energy can be defined as an energy possessed by an object or body due to its position.
Mathematically, potential energy is given by the formula;
[tex] P.E = mgh[/tex]
Where,
P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
In this scenario, a high diver steps off a diving platform that is 10 meters above the water, if no air resistance is present during the fall there will be a decrease in the driver's potential energy. This is simply because the potential energy of all physical objects is greatly or highly dependent on acceleration due to gravity.
Does the polarity of rocks in the Aragorn Sea suggest that the Sea is currently expanding? If so, explain? (ngl I am so confused by this question),
-and no links please, thank you
Answer:
55.7
Explanation:
how to calculate motion
Answer:
Distnace per unit time
Explanation:
Answer:
Newton's second law, which states that the force F acting on a body is equal to the mass m of the body multiplied by the acceleration a of its centre of mass, F = ma, is the basic equation of motion in classical mechanics.
Explanation:
the molecules in a solid state have _______ energy then molecules in a gas state
Answer:
less
Explanation:
hope this helps....................:)
Which combination of elements below results in a metallic bond?
Answer:
there isn't anything else posted to the question when you ask a question put a picture or write it out so people can see it
Explanation:
Why should a physical quantity be measured?
Answer:
It allows us to understand nature much more deeply than does qualitative description alone.
Explanation:
Without explaining the measurements, a quantity cannot always be measured.
Hope this helped, and please mark as Brainliest :)
True or false, please help me.
Comets have two tails; a white dust tail and a bluish ion tail.
Write a one paragraph essay about the importance of the different biomolecules in our life.
Answer:
#tried my bestt
do mark me as brainlist
Biomolecules are made by living organisms and they are made because they are functional. Biomolecules, or at least most of them, do not exist outside of living organisms because they are too complex to be created by chance chemical collisions. The odds of a single average sized protein to form by chance has been calculated at 1 out 10 to the 77th power. Biomolecules REQUIRE intelligent agency to form them.
The four main purposes of biomolecules are:
1. Structure (some proteins)
2. Energy storage and release (carbohydrates)
3. Protective layers (lipids)
4. Information storage and communication (DNA, RNA, endocrines of numerous various types and manipulated molecules, such as fatty acids)
A laserbeam takes 24ms to travel from a rocket to a reflective surface of a planet and back to the rocket. How far, in miles, is the rocket from this planet’s surface?
A)2200 miles
B)3600 miles
C)2400 miles
please show work, thank you!
Answer:B
Explanation:
Which side of the electromagnetic spectrum has shorter wavelengths?
Which side of the electromagnetic spectrum has higher energy?)
Which side of the electromagnetic spectrum has higher frequencies?
Explanation:
hopefully this helps :)
A rocket experiences a 45,000 N force as it accelerates at 30 m/s/s. What is the mass of the rocket?
Answer:
15,00kg
Explanation:
here's your solution
=> force = 45,000N
=> acceleration = 30m/s^2
=> mass = ?
=> Mass = force/acceleration
=> mass = 45,000/30
=> mass = 15,00kg
hope it helps
verify the law of moment.
Explanation:
TO VERIFY THE PRINCIPLE OF MOMENTS WHICH STATES THAT IF A NUMBER OF COPLANAR FORCES ACTIING ON A BODY S ,KEEP IT IN EQUILIBRIUM AND THEIR MOMENT ARE TAKEN ABOUT ANY POINT IN THEIR PLANE,THE SUM OF THE CLOCKWISE MOMENTS ,IS EQUAL TO SUM OF ANTICLOCKWISE MOMENT.
please mark me brainlist :)Answer:
TO VERIFY THE PRINCIPLE OF MOMENTS WHICH STATES THAT IF A NUMBER OF COPLANAR FORCES ACTING ON A BODY, KEEP IT IN EQUILIBRIUM AND THEIR MOMENT ARE TAKEN ABOUT ANY POINT IN THEIR PLANE, THE SUM OF THE CLOCKWISE MOMENTS, IS EQUAL TO SUM OF ANTICLOCKWISE MOMENT.
Helppppp
A kangaroo has a maximum gravitational potential energy during one jump of 770 J
When the kangaroo lands on the ground 14% of the maximum gravitational potential energy is transferred to elastic potential energy in one tendon.The tendon has an unstretched length of 35.0 cm
When the kangaroo lands on the ground the tendon stretches to a length of 42.0 cm
Calculate the spring constant of the tendon.
[5 marks]
Show ur working out
Answer:
44000n/m
Explanation:
A 31 kg child is traveling at 4 m/s while sledding down a hill. What is the child's kinetic energy at the bottom of the hill?
Answer:
K.E = 248 J
Explanation:
Since the child is travelling at a given velocity. The kinetic energy of the child down the hill can be given by the following formula:
[tex]K.E = \frac{1}{2}mv^2\\[/tex]
where,
m = mass of the child = 31 kg
v = velocity of the child = 4 m/s
Therefore,
[tex]K.E = \frac{1}{2}(31\ kg)(4\ m/s)^2\\[/tex]
K.E = 248 J
What are the most essential skills in Team Handball and why?
Answer:
The most important skill in handball is passing or throwing
Explanation:
You need to be able to pass the ball with accuracy. Throwing and shooting drills are normally incorporated into every training session for handball.
Answer:
Explanation:
The most important skill in handball is passing or throwing. You need to be able to pass the ball with accuracy. Throwing and shooting drills are normally incorporated into every training session for handball.
A wave oscillates with a period of 4.25 X 10-10 s. How many waves will strike a signal detector in 3 seconds?
Answer:
[tex]n=7.05\times 10^9[/tex] waves
Explanation:
Given that,
A wave oscillates with a period of [tex]4.25\times 10^{-10}\ s[/tex]
We need to find the number of waves that will strike a signal detector in 3 seconds.
We know that,
Frequency = (no. of oscillations)/time
Time period = time/(no. of oscillations)
Let there are n waves that will strike
So,
[tex]n=\dfrac{3}{4.25\times 10^{-10}}\\\\=7.05\times 10^9[/tex]
Hence, [tex]7.05\times 10^9[/tex] waves will strike in 3 seconds.
What is force? Do systems have inputs, outputs, do they have both, do they have one, do they have the other, what are the systems.
Answer:
A force is a push or pull upon an object resulting from the object's interaction with another object.
Systems always have inputs and outputs.
Explanation:
Helppp please pleaseeee fr
The African bush elephant weights over 8 tons, which is more than the weight of 4 cars! At maximum speed, it can run up to 40 km/h. How long does it take for an elephant running at top speed to go a distance of 10 kilometers?
Answer:
15 mins
Explanation:
What causes the inner core to be solid?
A) Intense heat.
B) Intense pressure.
C) Because it is made of iron.
D) Because of it’s density.
a hole in a copper plate has a diameter of 1.325 cm at 21C°. At what tempreture is the diameter equal to 1.164 cm
Answer:14C
Explanation: