Problem 3. (Diffusion by a protein in water) Estimate the diffusion constant of a protein of radius 5.0 nm moving through water at room temperature (300 K) using D = *34. Express your answer in um?/s. 6πης

A car is driving on a level road and has a force of 1000 N acting on it to the right. The road has friction acting on the car with a force of 200 N to the left. The car's engine is providing a force of 800 N to the right.

Force Diagram:

[1000N] ____________

|

|

|

[800N] ____________|

|

|

|

[-200N] ___________|

Where the arrow pointing to the right represents the force acting to the right, and the arrow pointing to the left represents the force acting to the left.

The force of 1000 N is the force of the wind pushing the car to the right. The force of 200 N is the friction acting on the car from the road trying to slow it down. The force of 800 N is the force provided by the car's engine pushing the car to the right.

Answer:

304 K

Explanation:

The average force on the shell while it is in the gun barrel is 10,869,833.33N.

Force applied on an object can be calculated by multiplying the mass of the object by its acceleration.

However, the acceleration needs to be calculated by using the following equation:

v² - u² = 2as

Where;

770² - 0² = 2 (a)(1.5)

592900 = 3a

a = 197633.3m/s²

Force = 55kg × 197633.3m/s²

Force = 10,869,833.33N

Therefore, the average force on the shell while it is in the gun barrel is 10,869,833.33N.

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Answer:

Explanation:

For refraction , the formula is

sin i / sin r = μ₂ / μ₁

where light is travelling from medium 1 to 2 having refractive index of μ₁ and μ₂ . Angle of incidence in medium 1 is i and angle of refraction in medium 2 is r .

Here i = 70°, r = 37°

μ₁ = 1.8 ,μ₂ = ?

sin70 / sin 37 = μ₂ / 1.8

.939 / .602 = μ₂ / 1.8

1.56 =  μ₂ / 1.8

μ₂ = 2.81 .

The value of refraction index for the second medium will be  \(\mu_2=2.16\)

Every material has a different refractive index. The refracted index of any material shows that the light is refracted by how much angle.

So like for water its value will be different also for glass its value will be different.

Now it is given in the question that

Angle of incidence \(i=70^o\)

Refractive index of the first medium \(\mu_1=1.8\)

Angle of refraction \(r=37^o\)

Now from snells law

\(\dfrac{Sin \ i}{Sin \ r} = \dfrac{\mu_2}{\mu_1}\)

\(\dfrac{Sin70}{Sin37} = \dfrac{\mu_2}{1.8}\)

\(\mu_2= \dfrac{Sin70\times1.8}{Sin37}\)

\(\mu_2=2.16\)

Thus the value of the refraction index for the second medium will be  \(\mu_2=2.16\)

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We are unable to directly determine the work performed by the engine because the distance over which the force acts is unknown.

This indicates that the effort expended to increase the car's speed will be equivalent to the change in kinetic energy of the vehicle. Thus, 30 kJ of effort must be performed.

The work W is equal to the force f times the distance d, or W = fd, to mathematically describe this idea.

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Answer:

A boat being accelerated by the force of the engine. The boat pushes through the water as chemical energy is transferred into kinetic energy.

Bringing water to the boil in an electric kettle.

OPTION  B IS THE ANSWER

Answer:

The real answer is A 2023 answer -_-

Explanation:

To build a smaller resistance, you can either decrease the length or increase the cross-sectional area of the conductor. To build a larger resistance, you can either increase the length or decrease the cross-sectional area. In a series connection where the total resistance is higher, the rate of Joule heating is greater compared to a parallel connection where the total resistance is lower.

The resistance of a conductor depends on its length, cross-sectional area, and resistivity. To build a smaller resistance, one can decrease the length of the conductor or increase its cross-sectional area. Conversely, to build a larger resistance, one can increase the length or decrease the cross-sectional area.

When resistances are connected in series, the total resistance is the sum of the individual resistances. Therefore, if you have two resistances in series, the overall resistance will be higher compared to each individual resistance. On the other hand, when resistances are connected in parallel, the total resistance is less than the smallest individual resistance. This is because the current has multiple paths to flow through, resulting in a lower overall resistance.

The rate of Joule heating, which is the heat generated in a conductor due to the flow of electric current, is directly proportional to the resistance. Therefore, in a series connection where the total resistance is higher, the rate of Joule heating is greater compared to a parallel connection where the total resistance is lower. This is because higher resistance leads to a higher rate of energy dissipation in the form of heat.

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Answer:

Gpe = 30000J

Explanation:

Given the following data;

Weight = 100N

Height = 300m

To find the gravitational potential energy (gpe);

Gravitational potential energy can be defined as an energy possessed by an object or body due to its position above the earth surface.

Mathematically, potential energy is given by the formula;

\( G.P.E = mgh\)

Where,

G.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.

Gpe = mgh

But weight = mg = 100N

Substituting into the equation, we have:

Gpe = 100*300

Gpe = 30000J

No, the sun cannot explain global warming. Global warming is a phenomenon in which the temperature of the Earth's surface and atmosphere is rising continuously due to human activities such as deforestation, burning of fossil fuels, and industrialization.

This increase in temperature cannot be explained only by an increase in solar radiation.There are several factors which contribute to global warming, including greenhouse gases such as carbon dioxide, methane, and water vapor. These gases trap heat in the Earth's atmosphere, which causes the planet's temperature to rise. The sun's radiation does contribute to global warming, but it is not the main cause.

i) To calculate the increase in solar radiation that would cause the Earth to warm up by 1 K, we can use the following formula:ΔS = ΔT / αWhere ΔS is the increase in solar constant, ΔT is the increase in temperature, and α is the Earth's albedo (reflectivity).α = 0.30 is the standard value used for the Earth's albedo.ΔS = ΔT / αΔS = 1 K / 0.30ΔS = 3.33 W/m2So, to explain the increase in temperature of 1 K over the last hundred years, the solar constant would need to increase by 3.33 W/m2.

ii) The observed fluctuation of the solar constant over the past 400 years has been around 0.1% to 0.2%. This is much smaller than the 3.33 W/m2 required to explain the increase in temperature of 1 K over the last hundred years. Therefore, it is unlikely that the sun is the main cause of global warming.

The sun cannot explain global warming. While the sun's radiation does contribute to global warming, it is not the main cause. The main cause of global warming is human activities, particularly the burning of fossil fuels, which release large amounts of greenhouse gases into the atmosphere.

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To stay in a circular orbit at a specific distance, the satellite must have a speed that is three times the square root of that distance. Therefore, the correct answer is option B.

The speed of a satellite in a circular orbit around a planet can be determined by equating the centripetal force required to keep the satellite in orbit with the gravitational force of the planet on the satellite.

The centripetal force is given by \(F = mv^2/r\), where m is the mass of the satellite, v is its speed, and r is the distance from the center of the planet.

The gravitational force is given by \(F = G(Mm)/r^2\), where G is the gravitational constant, M is the mass of the planet, and m is the mass of the satellite. Equating these two forces and solving for v gives \(v = \sqrt{(GM/r)}\)

Substituting the given values for g = 9 m/s² and r, we get \(v = \sqrt{(gr)}\), which simplifies to \(v = \sqrt{(9r)} = 3\sqrt{r}\).

Therefore, the correct answer is v = 3r. This means that the speed of the satellite must be three times the square root of the distance from the center of the planet to remain in a circular orbit at that distance.

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When a wire carrying a 26-a current travels perpendicular to the field of a powerful magnet, it experiences a 2.16-n force on the 4.00 cm of wire in the field. The average field strength is 1.6T

Less than 30 microteslas (0.3 gauss), which corresponds to most of South America and South Africa, to more than 60 microteslas (0.6 gauss), which corresponds to northern Canada, south of Australia, and parts of Siberia, are the strengths of the fields at the Earth's surface.

The magnitude of the wire whose length is L carrying a current I and making an angle θ with a magnetic field of density B is calculated using the following formula.

B = F/(I * L * Sin(θ)

Given that F = 2.16N

I = 30 A

L = 4cm = 4 * 10^-2m

θ = π/2

By substitution

B = 2.16/(30 * 4 * 10^-2 * Sin(π/2))

B = 1.6T

Hence, the average field strength is 1.6T

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The statement that describes energy of the roller coaster as it slows down while travelling to the top of the coaster is 'The cart loses kinetic energy and gains potential energy.'

Consider three roller coaster points that are each at a different height from the ground. If we disregard all frictional and drag forces and focus just on the conservative forces acting on the roller coaster car, we may assume that all kinetic and potential energy is conserved. As a result, energy only transforms from one form to another.

When the roller coaster vehicle hits the bottom, it will have reached its maximum level of kinetic energy since all of the gravitational potential energy has been transformed into kinetic energy.

At the top of the roller coaster, the object has its maximum gravitational potential energy and none at all (assumed there is no velocity). As the object begins to fall to the bottom, its gravitational potential energy falls and its kinetic energy increases.

Hence, as the cart reaches the top, it slows down because it loses kinetic energy and gains potential energy.

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Answer: Decomposition reaction.

Explanation:

Decomposition is a type of chemical reaction in which one reactant forms two or more than two products.

Decomposition reactions require breaking of bonds which require energy and thus all of the decomposition reactions are endothermic reactions. They require energy in the form of heat, electricity or sunlight and thus called as thermal, electrolytic and photolytic decomposition respectively.

The given reaction \(AB\rightarrow A+B\) is a type of decpomposition reaction.

The electric potential at point a is 150 V, at point b is 105.9 V, and at point c is 80 V.

To find the electric potential at points a, b, and c in Figure 1, we can use the formula V=kq/r where V is the electric potential, k is Coulomb's constant, q is the charge, and r is the distance from the charge.
At point a, the distance from the charge q is r1=1.2 cm. Therefore, the electric potential at point a is V=kq/r1 = 9x10^9 Nm^2/C^2 x 2x10^-9 C / 0.012 m = 150 V.
At point b, the distance from the charge q is r2=1.7 cm. Therefore, the electric potential at point b is V=kq/r2 = 9x10^9 Nm^2/C^2 x 2x10^-9 C / 0.017 m = 105.9 V.
At point c, there are two charges q and -q. Therefore, we need to find the electric potential due to both charges and add them. The distance from the positive charge q is r1=1.2 cm, and the distance from the negative charge -q is r2=3 cm. Therefore, the electric potential at point c is V=kq/r1 - kq/r2 = 9x10^9 Nm^2/C^2 x 2x10^-9 C / 0.012 m - 9x10^9 Nm^2/C^2 x 2x10^-9 C / 0.03 m = 80 V.
In summary, the electric potential at point a is 150 V, at point b is 105.9 V, and at point c is 80 V.

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True. An object with no forces acting on it will continue to move with constant velocity. When there are no external forces acting on an object, its velocity does not change.

The object, on the other hand, maintains a steady motion with the same speed and direction. This is known as Newton's first law of motion, also known as the law of inertia. Newton's first law of motion states that an object at rest will remain at rest, and an object in motion will remain in motion at a steady velocity in a straight line until an external force acts upon it. This implies that if there is no net force acting on an object, it will remain stationary or continue to move at a constant velocity. Newton's first law of motion may be used to explain why drivers and passengers in a vehicle continue to move forward when the vehicle brakes abruptly, while objects in the car that aren't strapped down may go flying. According to Newton's first law of motion, an object in motion remains in motion at the same speed and in the same direction unless acted upon by an external force. Because the person's body is in motion, it will continue to move forward at the same speed as the car until an external force, such as the seatbelt or airbag, brings it to a stop.

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The reactants in a chemical reaction are the atoms prior to the chemical reaction, found on the left side of the equation (option D).

A chemical reaction is a reaction typically involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.

In a chemical reaction, the atoms of substances called reactants are converted into substances called products.

Reactants are any of the participants present at the start of a chemical reaction. Reactants are present at the left hand side of a chemical reaction.

Therefore, reactants in a chemical reaction are the atoms prior to the chemical reaction, found on the left side of the equation.

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Answer:

what's the question?........

Answer:

Explanation:

6

Probability for X<20 for given probability distribution is 0.85.

Probability is concern with possibility. It is a branch of statistics which deals with the occurrence of a random event. Sum of probabilities for a particular event is one.  Probability has been introduced in statistics to predict how likely events are to happen. Probability means an extent to which something is likely to happen. To find the probability of a particular event to occur, firstly we must know the total number of possible outcomes. The distribution of probability for an event is called as probability distribution.

for example when a coin is tossed, it gives two possible outcomes Head and Tail. There is 50% of chance of getting Head or tail.

The Total probability is the sum of all the probabilities and it is always one.

In this problem Probability that x < 20,

P(x<20) = P(x<-10)+P(x<-5)+P(x<0)+P(x<5)+P(x<10)+P(x<15)

P(x<20) = 0.20+0.15+0.05+0.1+0.25+0.1 = 0.85

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Answer:

b. 375 Ohms

Explanation:

Given the following data;

Voltage = 4.5 V

Current = 12 mA

To find the resistance;

Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.

Mathematically, Ohm's law is given by the formula;

\( V = IR\)

Where;

Conversion:

1000 mA = 1 A

12 mA = 12/1000 = 0.012 A

\( R = \frac {V}{I} \)

Substituting into the formula, we have;

\( R = \frac {4.5}{0.012} \)  

Resistance, R = 375 ohms

Answer:

(a) - \(R_{eq.}=8 \ \Omega\)

(b) - \(I_1=3 \ A, \ I_2= 1.8 \ A, \ I_3=1.2 \ A\)

(c) - \(\Delta V_1=6 \ V, \ \Delta V_2= 18\ V, \ \Delta V_3= 18 \ V\)

Conceptual:

Things to know about parallel/series resistors:

A resistor takes electrical energy and converts it to some other form of energy, such as heat. In doing so this can alter a circuit's current and divide voltages.

Electrical current is the flow of charged particles.

To put it simply, voltage is what "pushes" current through a circuit.

\(\boxed{\left\begin{array}{ccc}\text{\underline{Ohm's Law:}}\\\\\Delta V=IR\end{array}\right}\)

How you should tackle these types of problems:

I recommend combining resistors until you have one resistor. This one resistor is what your total resistance is, which I call the equivalent resistor. Then work backwards from the equivalent resistor to find any information you need, utilizing Ohm's law and properties of parallel/series resistors.

Step-by-step:

Refer to the attached image(s).

1) The final check sum of the word (110011) using right rotation of the six bits by using cyclic exclusive-OR checksum is c. 000001. Hence, the correct option is c. 000001.

2) According to a compiler, something appears to be wrong, in the form of a warning. Therefore, the correct option is D. warning.

3) The method through which a system directs, regulates, or commands itself in PLC is Close-loop. Therefore, the correct option is B. Close-loop.

The result (MCQ) of the following output are as follows:

1. By using cyclic exclusive-OR checksum find the final check sum of the word (110011) using right rotation of the six bits,The final check sum of the word (110011) using right rotation of the six bits by using cyclic exclusive-OR checksum is c. 000001. Hence, the correct option is c. 000001.

2. Something appears to be wrong, according to a compiler.According to a compiler, something appears to be wrong, in the form of a warning. Therefore, the correct option is D. warning.

3 The method through which a system directs, regulates, or commands itself in PLC. The method through which a system directs, regulates, or commands itself in PLC is Close-loop. Therefore, the correct option is B. Close-loop.

So, the correct answer to question 1,2 and 3 are C, D, and B respectively.

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Answer:

Sound is produced when an object vibrates, creating a pressure wave. This pressure wave causes particles in the surrounding medium (air, water, or solid) to have vibrational motion. As the particles vibrate, they move nearby particles, transmitting the sound further through the medium. The human ear detects sound waves when vibrating air particles vibrate small parts within the ear.

In many ways, sound waves are similar to light waves. They both originate from a definite source and can be distributed or scattered using various means. Unlike light, sound waves can only travel through a medium, such as air, glass, or metal. This means there’s no sound in space!

Explanation:

Answer:

magnetic force

Explanation:

when some one gets charged up by maybe static eletricity the person will sustain the energy and the energy will make a force field around the person which can and will attract paper and he will be attractive

Explanation:

Examples for effect of force - example

1) Can change the state of an object(rest to motion/ motion to rest):For example, pushing a heavy stone in order to move it. 2) May change the speed of an object if it is already moving. ... 3) May change the direction of motion of an object

The Torque is only produced when the force is applied perpendicular to the moment arm.

The equal and opposite force acting at a point from the axis of rotation is called the moment.

M = F x r

Moment of force is also called as Torque.

Moment arm is the distance of the point of application of force from the axis of rotation of the body.

Thus, the perpendicular component only, produces the torque.

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Yes, if a galvanized hot water pipe is rusted on the outside, does that mean it is ready to spring a leak as Leaks will eventually occur if your pipes develop corrosion or rust on their exterior portion (often near the joints).

Applying a protective zinc coating to steel or iron to stop rusting is termed to as galvanization or galvanizing. The most used technique is hot-dip galvanizing, which generally involves immersing the components in a bath of hot, molten zinc. after galvanization the term used is refers as galvanized

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Answer:

ok

Explanation:

solid- molecules are close together and vibrating

liquid - molecules are loser, faster moving and take the shape of its container

gas- fast moving molecules and take whatever shape they want (like a room or the air outside)

Explanation:

Solids: The inter-molecular attraction force is the highest and the inter-molecular distance is the least. Solids have definite shape and volume.

Liquids: The inter-molecular attraction force is less than that of solids and the inter-molecular distance is more than solids. Liquids have definite volume but no definite shape.

Gases: The inter-molecular attraction force is the least and the inter-molecular distance is the highest. Gases have no definite shape or volume.

Answer:

transverse waves

Explanation:

this is because the definition of transverse waves is transverse waves are waves that travel perpendicular to the direction of the wave motion

however the definition of longitudinal waves is that longitudinal waves are waves that travel parallel to the direction of the wave motion.

so you can see the parallel means it forms compressions and rarefactions

but perpendicular means the particles will move up and down to the straight horizontal line, that's how lines are perpendicular right? ,

so the answer is transverse wave

hope this helps

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