Fick's law of diffusion states that the rate of diffusion is directly proportional to the concentration gradient, and the surface area and inversely proportional to the membrane's thickness
The differences expected are;
Yellow or blue food coloring placed in HOT water is more evenly spread with timeYellow or blue food coloring placed in HOT water diffuses than when placed in COLD waterThe reasons why the above expected differences are correct are as follows:
Diffusion that is time dependent is given by the following equation based on the fluctuation-dissipation theorem;
D(t) = μ·[tex]k_B[/tex]·T·(1 - [tex]e^{-t/(m\cdot \mu )}[/tex])
Where;
μ = The particle mobility
[tex]k_B[/tex] = Boltzmann's constant
T = The temperature in Kelvin
m = The mass of the particle
t = The time
Therefore, the rate of diffusion is directly proportional to the temperature, given that the substances have the same molecular masses
The differences to expect if, at the same time you place a yellow and blue food coloring in both hot and cold water is that;
The rate of diffusion of the food coloring will be faster when placed in the hot water, due to the higher kinetic energy (moving faster) of the liquid particles to which the coloring is added, such that the differences are as follows;
Diffusion of the coloring is more evenly spread and at a faster rate when either the yellow or blue food coloring is placed in HOT water than when placed in COLD water
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Anya does 20 push-ups by applying a force to elevate her body off the ground. For each push up, she does 100 J of work and takes 2 seconds. How much power per push-up did she deliver?
A. 10 W
B. 50 W
С. 120 W
D. 200 W
Answer:
its 120 all u have to do is plus 100 and 20
How do you calculate the average velocity of mercury as it orbits the sun?
Answer:Hope this helps!!!!!
Explanation:
People are fascinated with high-speed travel. A Boeing 747 flies at about 550 miles per hour. The Concorde Supersonic Transport flew over twice as fast at about 1350 miles per hour. That is impressively fast, but consider the speeds that we passengers on planet Earth always travel. The circumference of the Earth at the equator is 24900 miles and the residents of the tropic areas travel that distance every 24 hours. They are traveling over a thousand miles an hour. At 38° latitude we are traveling about 820 miles per hour. That is quite impressive but it pales in comparison with the orbital speed of the Earth, The average distance of the Earth from sun is 93.5 million miles. This means that in 365.25 days the Earth travels 587.5 million miles. This works out to about 67 thousand miles per hour. This is the speed we travel 24 hours a day, 365.25 days a year.
The orbital velocity is 2πR/T where R is the average radius of the orbit and T is the length of the year. The orbital velocity of a planet relative to that of Earth's is then the relative radius divided by the relative length of the year.
A vector is 0.888 m long and
points in a 205 degree
direction.
Find the y-component of the
vector.
hing
y-component (m)
Answer:
182.04
Explanation:
0.888×205=n
that where you the answer
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pols
10. MR. B HAS A MASS OF 88.96 KG. HOW MUCH DOES HE WEIGHT
IN JUPITER IF THE ACCELERATION DUE TO GRAVITY IN THAT PLANET IS
24.79 M/S ? USE W=MA.
HELP
Answer:
224.80kg
Explanation:
i just used like a calculator that can figure out the weight of someone on Jupiter i hope its right-
Charges may be transferred by:
A) induction
B) insulation
C) reduction
D) conduction
Answer:
D) conduction
Explanation:
Jamal has a bowl of ice cream. He leaves it in the sun for too long and it melts into a liquid. Jamal then places the liquid ice cream into a freezer that is set at 5°F.
Which of the following best explains how the liquid ice cream will change in the freezer?
Answer:
It will turn back into a solid but it will take some time.
Explanation:
Which circuit would have the most electrical power?
Answer:
c
Explanation:
Wound coils of wire that function as magnets when an electrical current is passed through it is
called?
a. Temporary Magnets
b. Permanent Magnets
c. Electromagnets
d. Diamagnet
e. Paramagnet.
Continental drift is______?
A:The movement of large land areas across earth's surface
B:The current that pushed Wegners hot air balloon
C:The movement of animals from Africa and South America
Answer is:
A:The movement of large land areas across earth's surface
A skydiver of mass mmm jumps from a hot air balloon and falls a distance ddd before reaching a terminal velocity of magnitude vvv. Assume that the magnitude of the acceleration due to gravity is g.
Required:
Find the power Pd supplied by the drag force after the skydiver has reached terminal velocity v. (in same terms)
Answer:
Explanation:
When the object falling attains terminal velocity , net force on it becomes zero. That means drag force becomes equal and opposite to its weight.
So drag force = mg
where m is mass of falling body and g is acceleration due to gravity .
The drag force is constant . It is doing work against the weight of falling body . Object is falling v m /s . That means drag force is doing work per second as follows
Work done per second = force x displacement per second
= mg x v
So
Power of drag force = mgv.
Pd = mgv.
What does it mean to say something is proportional?
Answer: When quantities have the same relative size. In other words they have the same ratio corresponding in size or amount to something else.
Explanation: Example: "A rope's length and weight are in proportion."
Example: "The punishment should be proportional to the crime"
The recoil of a cannon is probably familiar to anyone who has watched pirate movies. This is a classic problem in momentum conservation. Consider a wheeled, 500 kg cannon firing a 2 kg cannonball horizontally from a ship. The ball leaves the cannon traveling at 200 m/s. At what speed does the cannon recoil as a result?
Answer:
0.8 m/s
Explanation:
From the question,
MV = mv............................. Equation 1
Where M = mass of the cannon, m = mass of the cannonball, V = velocity of the cannon, v = velocity of the cannon ball.
make V the subject of the equation
V = mv/M........................ Equation 2
Given: m = 2 kg, M = 500 kg, v = 200 m/s
Substitute these value into equation 2
V = (2×200)/500
V = 400/500
V = 0.8 m/s
A scientist discovers a fossil of an animal and places it in the fossil record. The organism’s bones are similar to the bones of animal T, which appears earlier in the fossil record. Which conclusion is most reasonable?(1 point)
The fossils came from the same organism.
The fossils are from an ancestor of animal T.
The fossils are from animals that lived at the same time.
The fossils are from a descendant of animal T.
DO NOT PROVIDE FALL ANSWERS/ NO ANSWER
A. The fossils cam from the same organism
Hope this helps!
The fossils came from the same organism. This conclusion is most reasonable.
What is fossil?A fossil is an item that has survived in the Earth's crust as a remnant, impression, or trace of an extinct animal or plant. The main repository for knowledge regarding the evolution of life on Earth is the complex of information preserved in fossils found all across the world.
Fossils of dinosaurs discovered in Alberta, Canada. Only a small percentage of extinct species have been preserved as fossils, and often only those with a sturdy skeleton are capable of doing so. A calcareous skeleton or shell is present in the majority of major groups of invertebrate creatures (e.g., corals, mollusks, brachiopods, bryozoans). Other types have silicon dioxide or calcium phosphate shells (both of which are found in the bones of vertebrates).
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PLEASE TRY HELPING ME WITH THIS ONE QUESTION
A mass on a spring oscillates with a frequency of 0.1 Hz. The mass is 10 kg. What is the spring constant of the spring?
Answer:
3.94784176044N/m
Explanation:
The period of a spring is found using the formula T=2π[tex]\sqrt{\frac{m}{k} }[/tex], where m is the mass and k is the spring constant.
The period can also be found using the formula T=[tex]\frac{1}{f}[/tex], where f is the frequency.
T=T
∴2π[tex]\sqrt{\frac{m}{k} }[/tex]=[tex]\frac{1}{f}[/tex]
2π[tex]\sqrt{10/k}[/tex]=1/0.1
[tex]\sqrt{10/k}[/tex]=10/2π
10/k=1.59154943092²
10/2.53302959106=k
k=3.94784176044N/m
.
5. A runner of mass 60 kg accelerates at 2.0 m/s2 at the start of a
race. Calculate the force provided from her legs.
Answer:
F = 120 N
Explanation:
Given that,
The mass of a runner, m = 60 kg
Acceleration of the runner, a = 2 m/s²
We need to find the force provided from her legs. The formula for force is given by :
F = ma
Substitute all the values,
F = 60 kg × 2 m/s²
= 120 N
So, the required force is equal to 120 N.
Given:
Mass,
m = 60 kgAcceleration,
a = 2.0 m/s²As we know that,
→ [tex]Force = Mass\times Acceleration[/tex]
or,
→ [tex]F = ma[/tex]
then,
[tex]= 60\times 2.0[/tex]
[tex]= 120\ N[/tex]
Thus the above answer is right.
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A 0.10 kg stone is thrown from the edge of an ocean cliff with an initial speed
of 20 m/s. When it strikes the water below, it is traveling at 45 m/s. What is the
change in the kinetic energy of the stone?
Answer:
79.20 joule
Explanation:
1.
A 0.10kg stone is thrown from the edge of an ocean cliff with an initial speed of 21m/s. When it strikes the water below, it is traveling at 45m/s. What is the change in kinetic energy of the stone?
ΔEk = m/2*(V2^2-V1^2) = 0.05*(45^2-21^2) = 79.20 joule
The change in the kinetic energy of the stone is 81.25 J.
The given parameters;
mass of the stone, m = 0.1 kginitial speed of stone, u = 20 m/sfinal velocity of the stone, v = 45 m/sThe initial kinetic energy of the stone is calculated as follows;
K.E = ¹/₂mu²
K.E₁ = ¹/₂ x 0.1 x 20²
K.E₁ = 20 J
The final kinetic energy of the stone is calculated as follows;
K.E₂ = ¹/₂ x 0.1 x 45²
K.E₂ = 101.25 J
The change in the kinetic energy of the stone is calculated as follows;
ΔK.E = K.E₂ - K.E₁
ΔK.E = 101.25 J - 20 J
ΔK.E = 81.25 J
Thus, the change in the kinetic energy of the stone is 81.25 J.
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20. If 4 X 1016 J of energy is released in a nuclear
reaction. Calculate the mass defect, Am (2 mark)
(A) 0.22kg (B) 0.44kg (C) 0.66kg (D) 0.88kg
I found this formula in an old book.
E = m · c²
It may be useful.
c = 3 x 10⁸ m/s
c² = 9 x 10¹⁶ m²/s²
4 x 10¹⁶ J = m · (9 x 10¹⁶ m²/s² )
m = (4 x 10¹⁶ J) / (9 x 10¹⁶ m²/s²)
m = 0.44 kg (choice-B)
Find the y-component of this
vector:
0.250 m
18.40
Remember, angles are measured from
the +x axis.
y-component (m)
Enter
Answer:
-0.0789 m
Explanation:
Recall that the y-component comes associated with the sin(18.4) through the following trigonometric relationship:
y = 0.250 sin(-18.4) ≈ -0.0789 m
Notice it is negative since it is below the x-axis.
What is the potential energy of a 12 kg box on a 5 m high shelf?
Answer:6
Explanation:$’n
What are some indicators of energy transformations?
Explanation:
Contact, vision, sound, flavor, and smell are all markers of energy transformations. The most basic example would be when we notice something has begun to pass through vision. Whenever an entity accelerates or slows down, energy is constantly transformed.
In a
boundary, the more dense
plate will move below the less dense plate
when the plates collide.
A. transform
B. divergent
C. convergent
What is an effect of an object getting wet?
Answer:
once light hits a wet shirt, that water layer causes less of the blue shirt's blue wavelengths of light to be reflected toward your eyes and more of the blue light to be refracted, or bounce away from you, back into the fabric.
Explanation:
The equation for centripetal force can be derived by substituting the equation for centripetal acceleration into Newton’s second law.
Please select the best answer from the choices provided
T
F
Answer:
True.
Explanation:
Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.
Mathematically, it is given by the formula;
Force = mass * acceleration
[tex] F = ma[/tex]
Centripetal acceleration is given by the formula;
[tex] Acceleration, a = \frac {v^{2}}{r}[/tex]
Where;
v is the velocity.
r is the radius.
The equation for centripetal force can be derived by substituting the equation for centripetal acceleration into Newton’s second law.
Let centripetal force be Fc
Fc = ma
Substituting the value of "a" into the above formula;
[tex] Fc = m \frac {v^{2}}{r} [/tex]
[tex] Fc = \frac {mv^{2}}{r} [/tex]
What is the purpose of the antireflective coating on the glass layer of a solar
cell?
A. It keeps the solar cell from overheating.
B. It increases the charges on the semiconductors.
C. It provides better contact between the terminals.
D. It allows more solar energy to be absorbed.
The purpose of the antireflective coating on the glass layer of a solar
the cell is that It allows more solar energy to be absorbed, therefore the correct answer is option D.
What is solar energy?The energy emitted by the Sun as a form of thermal electromagnetic radiation is known as solar energy.
This solar energy is produced by nuclear fusion in the center of the Sun. Solar energy is a form of renewable source of energy.
As given in the problem statement we have to find out the best statement from the given options which describes the purpose of the antireflective coating on the glass layer of a solar cell.
In order to increase the amount of solar energy that can be absorbed, a solar cell's glass layer has an anti-reflective coating, therefore the correct answer is option D.
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Answer:
D
Explanation:
Explain how clinical thermometer is use to determine the temperature of the body
1. Aunt Minnie gives you $10 per second for 4 seconds. How much money do you have after 4 se
conds
Answer:
$40
Explanation:
10 × 4 = 40
or
10 + 10 + 10 + 10 = 40
How do I solve for the maximum height of someone who jumps straight up leaving the ground at 6.0 m/s.
Answer: 3.0 m/s
Explanation:
Which of the following bounces light in another direction?
a) Sunglasses
b) lamp
c) mirror
d) prism
Answer:
I do believe the answer is D. prism
Answer:
Explanation:
either all of the above or D <3
convert 592 minutes to seconds. using one step conversion.
Answer:
35520
Explanation:
592 times 60=35520
Which of the following best compares the structures in protists and fungi that allow these organisms to explore their environment. Question 2 options: Protists and fungi move using cilia, flagella, and hyphae. Some protists move using cilia and flagella. Fungi do not move but have fast growing hyphae. Protists move using hyphae. Some fungi move using cilia, and flagella. Neither protists nor fungi have cilia, flagella, and hyphae. They obtain energy only if the food source moves by them.
Answer:
Some protists move using cilia and flagella. Fungi do not move but have fast growing hyphae.
Explanation:
trust me