a) Write the names of the materials used in the ohm law according to the Figure 1?
b) If the voltage of a circuit is 12 V and the resistance is 40 , What is the generated power?

At pH = 8, the ratio of H+ ions to OH- ions is 1:1, indicating a neutral solution. The concentration of H+ ions and OH- ions is approximately 1 x 10^(-8) mol/L. The calculated and approximated ratios should match.

To calculate the ratio of H+ ions to OH- ions at pH = 8, we need to use the relationship between pH and the concentration of H+ ions. The pH scale is a logarithmic scale that measures the acidity or alkalinity of a solution based on the concentration of H+ ions.

The formula to calculate the concentration of H+ ions (\(C_H\)+) from pH is:

\(C_H\)+ = \(10^(^-^p^H^)\)

Substituting pH = 8 into the formula:

\(C_H\)+ = \(10^(^-^8^))\)

Using the properties of logarithms, we can calculate the concentration of H+ ions:

\(C_H\)+ ≈ 1 x \(10^(^-^8^))\) mol/L

According to the concept of neutrality in water, the concentration of H+ ions is equal to the concentration of OH- ions. Therefore, the concentration of OH- ions (\(C_O_H\)-) is also approximately 1 x \(10^(^-^8^))\)mol/L.

To calculate the ratio of H+ ions to OH- ions, we divide the concentration of H+ ions by the concentration of OH- ions:

Ratio = \(C_H\)+ / \(C_O_H\)-

Ratio = (1 x \(10^(^-^8^))\) / (1 x \(10^(^-^8^))\))

Ratio = 1:1

The ratio of H+ ions to OH- ions at pH = 8 is 1:1, indicating a neutral solution. This means that the concentration of H+ ions is equal to the concentration of OH- ions, resulting in a balanced ratio.

When comparing the calculated ratio of 1:1 to the approximated ratio at pH = 8, they should be the same because the ratio of H+ ions to OH- ions is determined solely by the pH value, which is consistent and mathematically derived. Therefore, the approximated and calculated ratios should match.

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The total distance is 105 kilometers and the total displacement is 15 kilometers east. Option C

To calculate the total distance, we add the distances traveled in each leg of the journey: 60 kilometers (from A to B) + 45 kilometers (from B back to A) = 105 kilometers.

However, displacement refers to the change in position of an object in a straight line from its starting point to its ending point. In this case, since the boat starts and ends at the same point (A), the total displacement is zero.

Hence The total distance is 105 kilometers and the total displacement is 15 kilometers east.

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Answer:

They maintain stable concentrations

Explanation:

Just took the test.

The statement describes the molecules and a reaction once it reaches equilibrium: they maintain stable concentrations, which is option A as the When a chemical reaction reaches equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction.

Equilibrium is a dynamic state, meaning that the reaction is still ongoing but the rates of the forward and reverse reactions are equal. This means that molecules are still reacting with each other, but at a constant rate, so that the concentrations of the reactants and products remain stable. When a reaction is not at equilibrium, the concentrations of the reactants and products change as the reaction progresses. However, once equilibrium is reached, the concentrations of the reactants and products no longer change, but the individual molecules are still moving and reacting with each other.

Hence, The statement describes the molecules and a reaction once it reaches equilibrium: they maintain stable concentrations, which is an option. A 

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According to the given statement M = 18.67 x 10⁶ Solar masses of the object that the star is orbiting.

The rate at which the position of an object shifts in any direction. Speed is defined as the ratio of the distance traveled to the time required to cover that distance. Speed is a numerical number since it just has a path and no magnitude.

Briefing:

M = Mass of Object = ?

v = orbital speed of star = 1100 km/s = 1100000 m/s

G= 6.67 x 1011 N.m2/kg is the universal gravitational constant,

r = distance between star and object = (22 light-days)(2.59 x 10¹³ m/1 light-day) = 5.698 x 10¹⁴ m

Therefore,

\(M=\frac{(1100000 \mathrm{~m} / \mathrm{s})^2\left(5.698 \times 10^{14} \mathrm{~m}\right)}{6.67 \times 10^{-11} N . \mathrm{m}^2 / \mathrm{kg}^2}\)

M = (9.39 x 10³⁷  kg)(1 solar mass/ 1.989 x 10³⁰ kg)

M = 18.67 x 10⁶ Solar masses

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The net force on the sled is 31.89 N. During sledding, the main forces are normal force and gravity.

The weight of the sledge and its rider, the normal force, and the kinetic frictional force all act on the moving sledge.

Net force is significant because it describes the motion of an object and can be used to calculate acceleration. Newton's first law of motion states that an object in motion will remain in motion, while an object at rest will remain at rest unless acted on by an unbalanced net force.

We can calculate by using the equation:

Net force = Force applied - Force of friction

where Force of friction = coefficient of kinetic friction (μk) * Normal force

we can use the equation:

Normal force = weight of sled

weight of sled = mass * gravitational acceleration

we know that gravitational acceleration (g) = 9.8 m/s^2

Therefore, the normal force = 42.2 kg * 9.8 m/s^2 = 413.56 N

The force of friction:

Force of friction = 0.269 * 413.56 N

                          = 111.11 N

We can calculate,

Net force = 143 N - 111.11 N = 31.89 N

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The reaction of load L is 0 (no horizontal force), and the reaction of load R is 10 kN (vertical upward force).

To determine the reactions of the loads L and R, consider the equilibrium of the forces acting on the structure.

First, analyze the vertical equilibrium. The sum of the vertical forces must be zero:

ΣFy = R − 7 kN − 3 kN

ΣFy = 0

This gives:

R = 10kN

Next, analyze the horizontal equilibrium. The sum of the horizontal forces must be zero:

ΣFx = L

ΣFx = 0

This indicates that there is no horizontal force acting on the structure.

Therefore, the reaction of load L is zero (no horizontal force), and the reaction of load R is 10 kN (vertical upward force).

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Answer:

At the surface it is defined by 9.80665 m/s2.

Answer:

Efficiency = 65%

Explanation:

The formula of Efficiency applied to any circumstance is:

Efficiency = Useful Energy / Energy applied

Then replacing the values given its:

Efficiency = 25 J / 32 J

Efficiency = 0.65

0.65 written as percentage is 65%, then:

Efficiency = 65%

As you do 32 joules of work using a pair of scissors and the scissors do 25 joules of work cutting a piece of fabric, the efficiency of the scissors is 78.125%.

Efficiency is the proportion of work done by a machine or throughout a process to the overall amount of energy or heat used.

The ratio of usable output to total input can be used to objectively measure efficiency. The efficiency of the device is defined as the ratio of energy converted to a useable form to the original amount of energy supplied.

Mathematically,

efficiency of a machine = (work output/work input)×100%

Given parameters:

Input work to the pair of scissors= 32 joules.

Output work from the pair of scissors= 25 joules.

Hence,

The efficiency of a machine = (work output/work input)×100%

= ( 25 joule/32joule)×100%

= 78.125%

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Answer:

khgfdsdfghjhnbvcxzxcvbn

Explanation:

Answer:it’s B.

Because it’s said in the fhoto

Answer:

\(D_l=d\)

Explanation:

From the question we are told that:

The Electric field of strength direction =Right

The Velocity of The First Electron=V_0

The Velocity of The Second Electron=V_0

Therefore

\(V_{e1}=V_{e2}\)

Generally, the equation for the Horizontal Displacement of electron is mathematically given by

\(D=\frac{at^2}{2}\)

Where

Acceleration is given as

\(a=\frac{V_o}{2d}\)

And

Time

\(T=\frac{d}{v_0}\)

Therefore horizontal displacement towards the left is

\(D_l=\frac{(\frac{V_o}{2d})(\frac{d}{v_0})^2}{2}\)

\(D_l=d\)

Answer:

35 degrees Fahrenheit is 1.66667 degrees in Celcius. Written in Kelvin, 35 degrees Fahrenheit would be 274.817 K.

Celcius:

(35°F − 32) × 5/9 = 1.667°C

Kelvin:

(35.001°F − 32) × 5/9 + 273.15 = 274.817K

F to C formula:

(32°F − 32) × 5/9 = 0°C

F to K formula:

(°F − 32) × 5/9 + 273.15 = K

Answer:

-12.1

Explanation:

i’m almost sure this is it, i’m checking my old answers

if not let me know and i’ll give you some more answers

Answer:

D. Push Factor

Explanation:

Weather hazards and natural disasters are horrendously negative things that people actively seek to avoid; they make people want to leave or depart from an area in order to escape them. As such, they are considered push factors.

(Weather hazards and natural disasters are not pull factors because when discussing push vs pull we are specifically describing the mentioned factor. This aspect is not considered both because the migration factor mentioned in this question actively makes people want to move to any area that avoids their issue. Remember that pull factors make people want to move to a specific place for a unique advantage, while push factors make people want to move to any general place for a common advantage.)

Answer:

12 dozen

Explanation:

Answer:

The table is proportional.

Explanation:

You would do 21/6 to get 3.5. Then 28/8 to get 3.5. After 35/10 to get 3.5. Finally 49/14 to get 3.5. If each answer (3.5) is the same than it is proportional.

hope i helped

We have that the more energy per second to radiated by the hotter  is mathematically given as

Energy per second=256

Question Parameters:

One star has a temperature of 20,000 K

and another star has a temperature of 8,000

Generally the equation for the Energy per second   is mathematically given as

Energy per second is Proportional to T^4

Where

T=20000/8000

T=4

therefore

Energy per second=4^4

Energy per second=256

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Advances in public health and medicine were some of the main reasons the population grew in the 18th century.

Public health focuses on illness prevention, whereas medicine focuses on the prevention, diagnosis, and treatment of patients. The primary instruments of the medical professional are medication, surgery, and other types of personalized intervention.

Vaccine invention and widespread usage, smallpox eradication, significant decreases in infectious disease outbreaks, and the rise and fall of various important chronic illnesses are among the contributions most noted for their influence on mortality and lifespan.

Public health evolved via trial and error and developing scientific medical knowledge, which was sometimes contentious and was sometimes prompted by war and natural calamities. The necessity for organized health protection arose as communal life evolved, particularly with urbanization and social changes.

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Answer:

The territory of Scotland was divided into two parts -- the highlands and the lowlands.

Explanation:

The people living in places of high altitudes are called highlanders. These high altitude places are called high lands and places with low elevations or altitudes are called the low lands. There are many differences between the two places and people experiences different difficulties in these places.

Some of the differences are :

The life of the people living in high lands are much more tougher than those living in the low lands. The highlanders have to work more hard than lowlanders.

The agricultural activities are more flourished in the low lands than in the high lands.

The low lands are more populated and highly industrialized than the high lands. Iron and steel industry, metal working industry and agriculture are some of the main industries of lowlands. They are the land of the Scottish nation.

Answer:

\(\Huge \boxed{\mathrm{2298.57 \ seconds}}\)

\(\rule[225]{225}{2}\)

Explanation:

\(\displaystyle \sf Speed = \frac{Distance \ covered }{Time \ taken}\)

\(\displaystyle \sf s = \frac{d }{t}\)

The speed is 0.7 m/s.

The distance covered is 1609 m.

\(\displaystyle \sf 0.7 = \frac{1609 }{t}\)

Multiplying both sides by t.

Then dividing both sides by 0.7.

\(\displaystyle \sf t = \frac{1609 }{0.7}\)

\(\sf t= 2298.57\)

It would take 2298.57 seconds.

\(\rule[225]{225}{2}\)

Answer:

\(\huge\boxed{\sf t = 2298.57\ secs}\)

Explanation:

Given:

Speed = v = 0.7 m/s

Distance = S = 1 mile = 1609 metre

Required:

Time = t = ?

Formula :

v = S/t

Solution:

v = S/t

t = S/v

t = 1609 / 0.7

t = 2298.57 secs

To find the mass in kilograms, you need to know the object's weight in newtons and the acceleration due to gravity. The formula for finding mass is mass = weight / acceleration due to gravity. So if you have an object with a weight of 100 N and the acceleration due to gravity is 9.8 m/s^2, the mass would be 10.204 kg.

The mass of the block is 0.025 kg or 25 g, when the spring has k = 28 N/m, and compresses 0.11 m before bringing the block to rest.

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Explanation:

imagine a column of water of 1 m² that starts at the surface of the ocean, which goes straight down 700m.

You need to calculate the pressure induced by only the column of water.

Please understand that the total pressure is found by adding the pressure of the column of water AND that of the pressure of the atmosphere.

p = F/A

p = pressure in Pa

F = Force in N

A = area in m²

To calculate the Force that gravity has on that column of water, you simply use:

F = m * g

where g = 9.81 kgm/s²

So first you need to calculate the mass of the column sea water with a density of 1.024*10³ kg/m³

Answer:

velocity and the gravitational pull that Earth has on it.

(motion of a satellite is the force of gravity)

Answer:We have , a relation in frequency f and wavelength  λ of a wave having the velocity v as ,

           v=fλ ,

given f=60Hz , λ=20m ,

therefore velocity of wave , v=60×20=1200m/s

Answer:

the intercept is the orgin (0,0)

Your weight at the top of the ladder would be one-quarter of its normal value. The correct option is C.

The gravitational pull of the Earth, denoted by g, is the net acceleration imparted to objects by the combined effect of gravitation and centrifugal force. It is a vector quantity whose direction corresponds to a plumb bob and whose strength or magnitude is determined by the norm.

The formula for gravity is,

g = GM / R²

g = 1 / R²

gt = 1 / (2R)²

gt / g = R² / 4R²

gt = 1 / 4g

Therefore, at the top of the ladder, your weight would be one-quarter of its normal value.

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Answer:

The ratio is   \(\frac{T_1}{T_2}  = 3.965  \)

Explanation:

From the question we are told that

   The  radius of Phobos orbit is  R_2 =  9380 km

    The radius  of Deimos orbit is  \(R_1  =  23500 \  km\)

Generally from Kepler's third law

    \(T^2 =  \frac{ 4 *  \pi^2 *  R^3}{G * M  }\)

Here M is the mass of Mars which is constant

        G is the gravitational  constant

So we see that \(\frac{ 4 *  \pi^2  }{G * M  } =  constant\)

    \(T^2 = R^3   *  constant \)      

=>  \([\frac{T_1}{T_2} ]^2 =  [\frac{R_1}{R_2} ]^3\)

Here \(T_1\) is the period of Deimos

and  \(T_1\) is the period of  Phobos

So

      \([\frac{T_1}{T_2} ] =  [\frac{R_1}{R_2} ]^{\frac{3}{2}}\)

=>    \(\frac{T_1}{T_2}  =  [\frac{23500 }{9380} ]^{\frac{3}{2}}]\)

=>    \(\frac{T_1}{T_2}  = 3.965  \)

The given values are:

We know the formula,

→ \(v = \frac{2 \pi r}{T}\)

then,

→ \(\sqrt{\frac{GM_{mars}}{r} } =\frac{2 \pi r}{T}\)

or,

→              \(T = 2 \pi \sqrt{\frac{r^3}{GM_{mars}} }\)

Now,

The orbital period of Deimos will be:

                   \(= 2 \pi \sqrt{\frac{(23500)^3}{GM_{mars}} }\)

The orbital period of Phobos will be:

                   \(= 2 \pi \sqrt{\frac{(9380)^3}{GM_{mars}} }\)

hence,

The ratio will be:

→ \(\frac{T_{deimos}}{T_{Phobos}}\) = \(\frac{2 \pi \sqrt{\frac{(23500)^3}{GM_{mars}} } }{2 \pi \sqrt{\frac{(9380)^3}{GM_{mars}} }}\)

             = \(\sqrt{(\frac{23500}{9380})^3 }\)

             = \(3.96\)

Thus the above answer is correct.

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Answer:

The Sun's gravity pulls on the planets, just as Earth's gravity pulls down anything that is not held up by some other force and keeps you and me on the ground.

Explanation:

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The object distance of the lens is 10 cm and the image distance of the lens is 30 cm.

The object and image distance formed by the lens is calculated by applying the following lens formula.

v + u = 40 ------- (1)

v/u = 3 ------------ (2)

v = 3u

Substitute v into equation (1);

3u + u = 40

4u = 40

u = 40/4

u = 10 cm

The image distance = 3u

= 3 x 10 cm

= 30 cm

Thus, the object distance is 10 cm and the image distance is 30 cm.

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