determine the limiting reactant of this 2Mg(s)+O2(g) 2MgO(s)​

Answer:

Geocentric model of the solar system helped to explain RETROGRADE MOTIONS OF PLANETS.

Explanation:

Geocentric model of planets was proposed by Ptolemy. It stated that all sun, planets and stars revolve round the earth in circular orbits.

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24 volts is the voltage drop across each of the resistors in the parallel configuration.

When resistors are connected in parallel, they share the same voltage across them. Therefore, the voltage drop across each resistor in this scenario would be the same.

Given:

Power supply voltage (V) = 12 V

Resistance of each resistor (R) = 30 Ω

Since the resistors are in parallel, the total resistance (R_total) can be calculated using the formula:

1/R_total = 1/R1 + 1/R2

Substituting the values:

1/R_total = 1/30 Ω + 1/30 Ω

1/R_total = 2/30 Ω

R_total = 15 Ω

Now, we can find the current flowing through the resistors (I) using Ohm's Law:

I = V / R_total

I = 12 V / 15 Ω

I = 0.8 A

Since the voltage drop across each resistor is the same, we can find it using Ohm's Law:

V_drop = I * R

V_drop = 0.8 A * 30 Ω

V_drop = 24 V

Therefore, the voltage drop across each of the resistors in the parallel configuration is 24 volts.

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Answer:

The ancient Greeks counted the Earth's Moon and Sun as planets along with Mercury, Venus, Mars, Jupiter, and Saturn. Earth was not considered a planet, but rather was thought to be the central object around which all the other celestial objects orbited.   ......     Jupiter is composed of gases — hydrogen and helium, mostly — all ... the largest planet in the solar system, the gas giant just doesn't have ... But unlike the sun, it lacks the necessary amount to begin fusion, the process that fuels a star. ... to 80 times more massive than it is at present to be considered a star.

The maximum height of the child is 12.14 m.

We define gravity as: a body is drawn toward the center of the earth or any other physical body with mass by the force known as gravity.

Given parameters:

Mass of the child; m = 21 kg.

Gravitational potential energy at maximum height; E =  2.5 x 10³ J

Let her maximum height is h. Then Gravitational potential energy at maximum height; E = mgh = 21 × 9.8 × h joule.

So, 21 × 9.8 × h =  2.5 x 10³

⇒ h = 12.14 m.

The maximum height of the child is 12.14 m.

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The magnitude of the force exerted by the fish is 3,052.5 N.

The given parameters;

According to Newton's third law, the force exerted by the reel is equal in magnitude to the force fish exerted on the reel.

The centripetal force of the reel = force exerted by the fish

\(F_c = m\omega^2 r\\\\F_c = 0.652 \times (306)^2 \times 0.05\\\\F_c = 3,052.5 \ N\)

Thus, the magnitude of the force exerted by the fish is 3,052.5 N.

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When a 2.5 kg sledgehammer hit a cement block with a force of 6.0 Newtons. The force the sledgehammer exerted on the cement block is greater in magnitude and opposite in direction to the force the cement block exerted on the sledgehammer.

This refers to forces that act on an object in opposite directions. The net force is gotten by solving for the difference between the two forces.

When the opposing forces are equal or balanced, the net force is zero.  The sledgehammer hits with a force and the cement block is receiving the impart as a stationary object.

Obviously, the force the sledgehammer exerted on the cement block is greater in magnitude and opposite in direction to the force the cement block exerted on the sledgehammer.

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Answer:

Option C

Explanation:

C. Convection...

The phrase 'hot air rises'describe the convection as a type of heat transfer therefore the correct answer is option C.

It is the type of  heat transfer in which the heat is transferred from the bulk motion of the particles of liquid and gases due to the presence of temperature gradient.
The hot air rises is one of the best example of convection currents
The boiling water is also an example of convection heat transfer process in which the hot water rises to the top of the surface due to the bulk molecular movement of convection current .

The hot air rides is the bulk movement of the gas molecules because of the presence of the temperature gradients resulting in the varied density of air ,the hot air rising to the surface have less density as compared to the air settling near the surface ,the convection current phenomenon is responsible for the phrase  "hot air rises" ,therefore the correct option is the option C.

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Answer:

"light year" - about 6 million million miles

The nearest star is alpha Centauri - about 24 million million miles away

The amount of load lifted by the pulley when the efficiency is 60% and effort is 50 N is determined as 30 N.

The amount of load lifted by the pulley is calculated by applying the formula for efficiency of a machine as follows;

E = L / E   x  100%

where;

The amount of load lifted by the pulley is calculated as;

60 = L / 50   x 100%

60 = 100L / 50

100L = 50 x 60

100 L = 3000

L = 3000 / 100

L = 30 N

Thus, the amount of load lifted by the pulley is 30 N.

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Answer:

2.12m/s

Explanation:

Given parameters:

Force on trolley  = 1.5N

Mass of trolley  = 0.2kg

Unknown:

Velocity of the trolley  = ?

Solution:

To solve this problem, we first find the acceleration of the trolley;

          Force  = mass x acceleration

         Acceleration  = \(\frac{Force }{mass}\)

Insert the parameters and solve;

          Acceleration  = \(\frac{1.5}{0.2}\)   = 7.5m/s²

Now to find the acceleration;

  Initial velocity  = 0m/s

  v² = u² + 2aS

v is the final velocity

u is the initial velocity

a is the acceleration

S is the distance

  Distance  = 30cm and this is 0.3m

     v² = 0² + 2(7.5)0.3  = 4.5

     v = √4.5 = 2.12m/s

Each of the five friends needs to pay £12 to cover the cost of their own meals and contribute towards the birthday person's meal. Using mean allows us to distribute the cost equally among the friends, ensuring a fair division of expenses for the meal.

To determine how much each of the five friends needs to pay, we can use the concept of averages (mean) and divide the total cost by the number of people paying.

In this scenario, the total cost of the meal for 6 people is £12 per person. Since the other 5 friends have decided to pay for the birthday person's meal, they will collectively cover the cost of their own meals plus the birthday person's meal.

To calculate the total cost covered by the five friends, we can subtract the cost of one person's meal (since the birthday person's meal is being paid by the group) from the total cost. The cost of one person's meal is £12.

Total cost covered by the five friends = Total cost - Cost of one person's meal

= (£12 x 6) - £12

= £72 - £12

= £60

Now, to find out how much each of the five friends needs to pay, we divide the total cost covered by the five friends (£60) by the number of friends (5).

Amount each friend needs to pay = Total cost covered by the five friends / Number of friends

= £60 / 5

= £12

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The time it takes the stone to fall from a height of 7.11 m is 1.2 seconds.

Time can be defined as an ongoing and continuous sequence of events that occur in succession, from past through the present, and to the future.

To calculate the time it takes the stone to drop from an height of 7.11 m, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1 and solve for t.

Hence, the time it takes the stone to fall is 1.2 seconds.

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Of the four types of personalities, the traits that are ranked as the primary function according to type dynamics is Judging and prospecting.

Personalities refers to the traits characters and attributes possessed inherently by individuals.

The four groups of personalities using the 16 Personalities Tests are;

Of the four, the traits that are ranked as the primary function according to type dynamics is Judging and prospecting.

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Answer:

Explanation:

Let's first convert the speeds of the trains from km/hr to m/s:

Train A: 24 km/hr = (24 x 1000) / (60 x 60) = 6.67 m/s

Train B: 48 km/hr = (48 x 1000) / (60 x 60) = 13.33 m/s

Now, let's find the distance covered by train A until it reaches its constant speed:

v = u + at

where

u = initial velocity = 0

a = acceleration = 1/6 m/s^2

t = time taken to reach constant speed

At constant speed, v = 6.67 m/s

So, 6.67 = (1/6)t + 0

t = 40 seconds

Using the formula for distance covered during uniform acceleration:

s = ut + (1/2)at^2

The distance covered by train A during the acceleration phase is:

s = (1/2)(1/6)(40^2) = 133.33 m

Now, let's find the equation of motion for train B:

s = ut + (1/2)at^2

where

u = initial velocity = 0

a = acceleration = 1/3 m/s^2

t = time taken to overtake train A

At the time of overtaking, both trains will cover the same distance. Let's call this distance "d". So we have:

d = 133.33 + 6.67t (distance covered by train A + distance covered by train B)

Setting the equations for both trains equal to each other, we get:

133.33 + 6.67t = (1/2)(1/3)t^2 + (1/3)t^2

Simplifying and solving for t, we get:

t = 180 seconds

Therefore, train B will overtake train A after 180 seconds or 3 minutes.

The average mechanical power in watts that the engine must supply during this time interval is 58600 watts.

CALCULATION:-

The work done on an object by means of a net pressure equals the change in kinetic energy of the object:

W = KEf - KEi

W = 1/2m(vf² - vi²)

     =1/2*1172*[30²-20²]

     =293000 JOULE

Power is the rate at which work is performed. it's miles the paintings/time ratio. Mathematically, it's far computed the use of the following equation.

Power = Work/time

P = W / t

   =293000/5

   =58600 joule

Whilst pressure acts upon an object to cause a displacement of the object, it's miles said that work became accomplished upon the item. The kinetic energy of an object is the strength that it possesses due to its movement.

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Answer: \(0.00680\ m^3\)

Explanation:

Given

The weight of the object, when submerged in the water is \(980\ N\)

When it is submerged in the bromine liquid, it weighs \(840\ N\)

Suppose,

\(\rho=\text{Density of object}\\\rho_w=\text{Density of water}\\\rho_b=\text{Density of bromine}\\V=\text{Volume of the object}\)

for water,

\(\Rightarrow V(\rho -\rho_w)g=980\quad \ldots(i)\)

For bromine

\(\Rightarrow V(\rho-\rho_b)g=840\quad \ldots(ii)\)

Divide (i) and (ii)

\(\Rightarrow \dfrac{\rho-1000}{\rho-3100}=\dfrac{980}{840}\\\\\Rightarrow 840\rho -840\times 1000=980\rho-980\times 3100\\\\\Rightarrow 140\rho=(3038-840)\cdot 1000\\\\\Rightarrow \rho=15,700\ kg/m^3\)

Put the density value in equation (i)

\(\Rightarrow V(15,700-1000)\cdot 9.8=980\\\\\Rightarrow V=\dfrac{100}{14,700}\\\\\Rightarrow V=0.00680\ m^3\)

The best suitable equipment for handling nuclear fuel is lab coat,

Videos can be streamed from the cloud to a computer with no loss in quality because Digital signals are used to transmit data to and from the cloud.

How do digital signals work?

An established or one that represents data as a step made up of discrete values is known as a digital signal. There is no noise produced by digital signals. Electronic signals sent as pulses are used to transmit digital signals to computers. These signals can be found in things like digital phones and computers.

Because digital signals are used to transport data to and from the cloud, it should be noted that videos are said to stream from the cloud to a computer without quality degradation.

Videos can be streamed from the cloud to a computer with no loss in quality because Digital signals are used to transmit data to and from the cloud.

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The strength of the electric field is 2157 N/C, the angle at the net electric field is 9.33° above the horizontal.

Strength of the electric field:

= E = k Q / d²

Given;

k = 8.99 · 10⁹

d 1 = 5 cm = 0.05 m

Q 1 = 3 n C = 3 · 10⁻⁹ C

E 1 = 8.99 · 10^9 · 3 · 10⁻⁹ C / ( 0.05 m )² = 10,788 N / C

E 1 = 10,788 i + 0 j

(d 2)² = √ (5² + 10²) =√ 125 = 11.18 cm = 0.1118 m

E 2 = 8.99 · 10⁹ · 3 · 10⁻⁹C / ( 0.1118 m )² = 2,157 N/C

Angle:

cot⁻¹ ( 5/10 ) = cot⁻¹ 0.5 = 63.43°

= E 2 = cos 63.43° · 2,154 i + sin 63.43° · 2,154 j

= E 2 = 963.46 i + 1,927.02 j

E = E 1 + E 2 = 11,731.46 i + 1,927.02 j

= √ (11,731.46² + 1,927.02² )

= 11,888 N/C

α = tan⁻¹ ( 1,927.02/11,731.46) = tan⁻¹ 0.1643 = 9.33° above the horizontal.

-- The given question is incomplete, I answer the question in general according to my knowledge and the complete question is

"What are the strength and direction of the electric field at the position indicated by the dot in (figure 1)? Where, the two positive charges of 3 nC are at a distance of 10 cm and the distance between the first proton and the position indicated is 5 cm." --

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Answer:

The height from which the diver jumped can be calculated using the laws of motion and the principle of conservation of energy.

Let's assume that the diver jumped from a platform with an initial velocity of zero. The potential energy (PE) of the diver at the top of the platform is given by:

PE = mgh

Where m is the mass of the diver, g is the acceleration due to gravity (9.8 m/s^2), and h is the height from which the diver jumped.

When the diver jumps, the potential energy is converted into kinetic energy (KE) as the diver moves downwards. The kinetic energy of the diver just before hitting the water is given by:

KE = (1/2)mv^2

Where v is the velocity of the diver just before hitting the water.

According to the principle of conservation of energy, the potential energy at the top of the platform is equal to the kinetic energy just before hitting the water. Therefore, we can equate the two equations above and solve for h:

mgh = (1/2)mv^2

h = (1/2)v^2/g

We need to find the value of v to calculate h. We can use the kinematic equation:

v^2 = u^2 + 2as

Where u is the initial velocity (which is zero in this case), a is the acceleration due to gravity (9.8 m/s^2), and s is the distance travelled by the diver (which is equal to h).

Substituting the values, we get:

v^2 = 2gh

v^2 = 2 * 9.8 * h

v^2 = 19.6h

Therefore:

h = v^2/(19.6)

Now, let's assume that the velocity of the diver just before hitting the water was 10 m/s (a reasonable value for a diving competition). Then:

h = (10^2)/(2*9.8) = 51 meters

Therefore, the height from which the diver jumped is approximately 51 meters.

These mudflows are called Lahar.

A quickly moving mixture of rock debris and water that begins on a volcano's slopes is referred to as a lahar in Indonesian. Other names for lahars are volcanic mudflows and debris floods. The size, pace, and volume of material transported by a moving lahar can constantly alter as it rushes downstream. It resembles a swirling slurry of wet concrete.

The melting of snow and ice as well as the ingestion of river or lake water by the moving slurry may both add to its water consumption. A lahar's starting flow may be quite tiny, but as it entrains and integrates everything in its path, including rocks, dirt, vegetation, even structures like houses and bridges, it may increase in volume.

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Answer:

D because the line isn't changing which means constant speed it's going at the same rate so yea it's D

Answer:

D.

Hope that helps!?

Explanation:

The correct asnwer is D. The permanent magnets cause the metal loop in the

electromagnet to turn.

In an electric motor, the permanent magnets cause the metal loop in the

electromagnet to turn. So, option (D) is correct.

An electrical device that transforms electrical energy into mechanical energy is an electric motor. The majority of electric motors work by creating force in the form of torque imparted to the motor shaft through the interplay of the magnetic field of the motor and electric current in a wire winding.

In an electric motor, their remains a permanent magnet to produce constant magnetic field. When electric current is passed through the conducting loop, it acts ling electromagnet and begins to rotate. Thus an electric motor works. Hence, option(D) is correct.

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Answer:

The mechanical advantage would depend on where the load force and the balancing force were placed on the stick

MA = (50 - F) / (L - 50)

Supoose the balancing force was placed at zero and the load at 75 cm

then MA = (50 - 0) / (75 - 50) = 50 / 25 = 2

or the balancing force was applied at 10 cm and the load force was applied at 60 cm then

MA =  (50 - 10) / (60 - 50) = 40 / 10 = 4

The final velocity of the red ball is 18 m/s.

The term momentum has to do with the product of the mass and the velocity of an object We know that the momentum is always conserved in accordance with the Newton third law. Also it is clear that the momentum before collision is equal to the total momentum after collision and we are going to apply this principle here.

Then;

Mass of the blue ball =  6 kg

Mass of the red ball =  1 kg

Initial velocity of the blue ball =  4 m/s

Initial velocity of the red ball = 0 m/s

Final velocity of the red ball = ??

Final velocity of the blue ball =  1 m/s

We now have;

(6 * 4) + (1 * 0) = (1 * v) + (6 * 1)

24 = v + 6

v = 24 - 6

v = 18 m/s

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Answer:

86.7 m/s²

Explanation:

Given that

Radius of the circle, r = 0.3 m

Height of the plane above the ground, = 1 m

Distance at which the ball lands, d = 2.3 m

To solve this question, we would use one of the principles of projectile motion.

v = ut + 1/2at²

-1 = 0 + 1/2 * -9.8 * t²

-1 = -4.9 t²

t² = 1/4.9

t² = 0.204

t = √0.204

t = 0.45 s

Then again, it's constant horizontal speed is

v(x) = x/t

v(x) = 2.3 / 0.45

v(x) = 5.1 m/s

And finally, the centripetal acceleration is gotten using the formula

a = v²/r

a = 5.1² / 0.3

a = 26.01 / 0.3

a = 86.7 m/s²

Starting from rest and accelerating at 4.8 m/s², the plane's velocity at time t is

v(t) = (4.8 m/s²) t

so that after 15 s, its speed at takeoff be

v(15 s) = (4.8 m/s²) * (15 s) = 72 m/s

In this time it takes for the plane to take off, it will travel a distance at time t of

x(t) = 1/2 (4.8 m/s²) t²

and it takes 15 s to take off, so the runway would have to have a length of

x(15 s) = 1/2 (4.8 m/s²) * (15 s)² = 540 m

Answer:

What Is Moral Subjectivism? Moral subjectivism is based on an individual person's perspective of what is right or wrong. An individual can decide for themselves that they approve or disapprove of a certain behavior, and that is what determines if the behavior is right or wrong.

Answer:

The transfer of thermal energy from your hand to the ice cube, as dictated by the second law of thermodynamics, causes the sensation of coldness. The third law of thermodynamics also plays a role in reducing the thermal energy and increasing the order of the molecules in the ice cube, contributing to the overall sensation of coldness.

Explanation:

When you pick up an ice cube, your hand feels cold due to the transfer of thermal energy from your hand to the ice cube. This transfer of energy occurs as a result of the second law of thermodynamics, which states that thermal energy always flows spontaneously from a hotter object to a colder object.

In this case, the ice cube is colder than your hand, and therefore has a lower thermal energy. When you touch the ice cube, heat flows from your hand to the ice cube in an attempt to equalize the temperature of the two objects. This transfer of heat causes the thermal energy of your hand to decrease, resulting in the sensation of coldness.

Another factor that contributes to this sensation is the third law of thermodynamics, which states that as the temperature of an object approaches absolute zero (the theoretical limit of zero Kelvin or -273.15 degrees Celsius), its entropy approaches a minimum value. This means that when the thermal energy of an object, such as an ice cube, is much lower than that of your hand, the disorder of its particles is greatly reduced. As a result, the molecules in the ice cube vibrate more slowly and produce less heat, leading to the sensation of coldness when touched.