Which airplane has more potential energy, a boeing 787 dreamliner having a mass of 2,450kg at 11,500 m above Earth, or a boeing 747 having a mass of 3150 kg at 9000 m above Earth?

Answer:

a)  y = 42 t - 4,905 t² ,      v = 42 - 9.81 t,  b)   t = 4.281 s , c)   y = 89.9 m

Explanation:

This problem is an example of vertical launch

a) the expression for the position is

         y = v₀ t - ½ g t²

we substitute

          y = 42 t - 4,905 t²

the expression for speed is

        v = v₀ - gt

        v = 42 - 9.81 t

b) the speed is null when v = 0

         v₀ = gt

          t = v₀ / g

          t = 42 / 9.81

          t = 4.281 s

c) for the maximum height we can use the expression

        v² = v₀² - 2gy

    at maximum height v = 0

         y = v₀² / 2g

     let's calculate

        y = 42 2/2 9.81

        y = 89.9 m

Answer:

Mental time travel has been studied by psychologists, cognitive neuroscientists, philosophers and in a variety of other academic disciplines. Major areas of interest include the nature of the relationship between memory and foresight, the evolution of the ability (including whether it is uniquely human or shared with other animals), its development in young children, its underlying brain mechanisms, as well as its potential links to consciousness, the self, and free will.

Explanation:

Answer:

v = -\frac{n \ m}{M} \ v'

for the man to return to the ship he must throw the balls in the opposite direction of the ship

Explanation:

For this exercise we can use the conservation of momentum. Let's form a system made up of man and baseballs.

Initial instant. Before throwing the balls

     p₀ = 0

Final moment. After throwing the balls

     \(p_{f}\) = M v + n m v '

where M is the mass of the man, m is the mass of each ball and n is the number of balls , v isthe speed man and v' is the speed ball

Since the forces are internal, the momentum of the system is conserved

     p₀ = p_{f}

      0 = M v + n m v ’

      \(v =- \frac{n \ m}{M} \ v'\)

If we analyze this expression, for the man to return to the ship he must throw the balls in the opposite direction of the ship

\( \qquad \qquad \bf \huge\star \: \: \large{ \underline{Answer} } \huge \: \: \star\)

\(\textsf{ \underline{\underline{Steps to solve the problem} }:}\)

In the given equation :

\( \qquad❖ \: \sf \:y = a + b + c( {t}^{2} )\)

If three physical quantities is to be added or subtracted, they must have same dimensions.

So, dimension of y = dimension of c(t²)

And we already know,

( by squaring )

Now, we need to calculate dimension and unit of c :

\( \qquad❖ \: \sf \:dim(y) = dim(c {t}^{2} )\)

\( \qquad❖ \: \sf \:M⁰L¹T⁰ = dim(c) \sdot M⁰L⁰T²\)

\( \qquad❖ \: \sf dim(c) = \frac{M⁰L¹T⁰}{ M⁰L⁰T²} \)

\( \qquad❖ \: \sf dim(c) = {M⁰L¹T {}^{ - 2} }\)

Now, we got the dimension of c as :

So, it's SI unit will be :

[ since SI unit of length/distance = m, and SI unit of Time = sec, hence SI unit of T² = s² ]

Question

If y = a + by + c(t)^2 where y = distance , t = time , find the dimension and unit of c.

\(\boxed{\green{c=M^0L^1T^{-2}}}\)

Solution Given:

We know that

Law of Homogeneity of Dimensions In any correct equation representing the relation between physical quantities, the dimensions of all the terms must be the same on both sides.

Dimension of Time is denoted by [T]

Dimension of distance is denoted by [L]

Dimension of mass is denoted by [M]

So,

Dimension of a, by, c(t)^2  should be equal to y.

y=[L] .......[1]

a=[L].......[2]

by=[L].......[3]

c(t)^2=[L].....[4]

Now

The dimension of c can be obtained as:

c(t)^2=[L]

c= \( \frac{[L]}{[T^2]}\)

\(\boxed{\green{c=M^0L^1T^{-2}}}\)

Sry for late!!

In 10-cm-diameter charged rings face each other, 15.0 cm apart. Both rings are charged to 30.0 nC .The electric field strength between the charged rings is approximately 1.7976 × 10^6 N/C.

To find the electric field strength between the charged rings, we can use Coulomb's law. Coulomb's law states that the electric field strength (E) between two charged objects is given by:

E = k × (q1 / r^2)

Given:

The diameter of each charged ring is 10 cm, which means the radius is 5 cm (or 0.05 m).

The rings are 15.0 cm apart, which is the distance (r) between their centers (or 0.15 m).

Both rings are charged to 30.0 nC (or 30.0 × 10^-9 C).

Now, we can calculate the electric field strength:

E = (8.99 × 10^9 N m^2/C^2) × (30.0 × 10^-9 C) / (0.15 m)^2

E = (8.99 × 10^9 N m^2/C^2) × (30.0 × 10^-9 C) / (0.0225 m^2)

E ≈ 1.7976 × 10^6 N/C

Therefore, the electric field strength between the charged rings is approximately 1.7976 × 10^6 N/C.

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It's not just here in the United States that we're seeing this, London has also added this category to their marathon.

This is an example of how society is constantly evolving and recognizing the need for inclusion and diversity. The social construction of gender and gender identity has traditionally been binary, with individuals being categorized as either male or female. However, as society has become more aware and accepting of non-binary gender identities, we are seeing a shift in the way that institutions and organizations are accommodating these individuals.

By creating a non-binary category in marathons, organizers are acknowledging the importance of inclusivity and providing a space for non-binary individuals to participate in sports without being forced to conform to binary gender categories.

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Answer:

it's gravitational potential energy would have converted to kinetic energy half way back when it's falls

You would have 666 terms in the calculation for the electric potential energy of the 37-charge configuration.

To calculate the electric potential energy for a configuration with 37 charges, you would need to consider the interactions between each pair of charges.

The formula for electric potential energy between two point charges q1 and q2 separated by a distance r is given by:

PE = [k × (q1 × q2)] / r

Where:

   PE is the electric potential energy

   k is Coulomb's constant (approximately 9 x 10^9 Nm^2/C^2)

   q1 and q2 are the magnitudes of the charges

   r is the distance between the charges

Since you have 37 charges, you would need to calculate the electric potential energy for each pair of charges and sum them up. To determine the total number of terms in the calculation, you can use the formula for the number of combinations of n objects taken 2 at a time:

Number of terms = nC2 = n! / ((n - 2)! × 2!)

In this case, n = 37:

Number of terms = 37! / ((37 - 2)! × 2!)

= 37! / (35! × 2!)

= (37 × 36) / 2

= 666

Therefore, you would have 666 terms in the calculation for the electric potential energy of the 37-charge configuration.

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Answer:

zero work is done by the worker

The equation of the force between the two masses separated by distance r, is determined as Gmm/r².

The equation of the force between the two masses is determined from Newton's law of universal gravitation as shown below.

f = Gmm/r²

where;

Thus, the equation of the force between the two masses separated by distance r, is determined as Gmm/r².

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Answer: B.

Explanation:

The valence shell is the outermost shell of an atom.  All noble gases have a "full" valence shell, meaning they all have 8 electrons (except Helium).  This makes these elements non-reactive (inert).

Answer: Momentum can be defined as "mass in motion

Explanation:

The hydrogen atom will have 5 values for the azimuthal quantum number, l.

i) A group of quantum states of the hydrogen atom has the principal quantum number as,

n = 5.

Therefore, the possible values of the azimuthal quantum number of the hydrogen atom, l will be,

l = 0, 1 ,2, ..., (n - 1) = 0, 1, 2, ..., (5 - 1) values

l = 0, 1, 2, 3, 4

So, the hydrogen atom will have 5 values for the azimuthal quantum number.

ii) Given that,

The principal quantum number of hydrogen atom, n = 5

Azimuthal quantum number of the hydrogen atom, l = 3

Therefore, the possible values of magnetic quantum number, m will be,

m = -l, ..., 0, ...+l

m = -3, -2, -1, 0, 1, 2, 3

So, the hydrogen atom will have 7 values for the magnetic quantum number.

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Given that distance of moon from the earth is, R= 3.84 x 10^8 m

Also, time taken to complete one revolution is, T= 23.7 days = 2047680 seconds

Mass of the moon is, m= 7.347 Kg

To find the centripetal acceleration,

Substituting the values, we get

The magnitude (r) of the resultant vector (r with arrow) is related to the magnitudes (a) and (b) of the vectors (a with arrow) and (b with arrow) through the concept of vector addition.

When two vectors are added together, the magnitude of their resultant vector can be determined using the Pythagorean theorem. If vectors (a with arrow) and (b with arrow) are at right angles to each other, the magnitude (r) can be calculated as the square root of the sum of the squares of (a) and (b) (\(r^{2}\) = \(a^{2}\) + \(b^{2}\)).

If the vectors are not at right angles, their magnitudes and the angle between them need to be taken into account using trigonometric functions.

In summary, the magnitude of the resultant vector is determined by the magnitudes of the individual vectors and their relative directions or angles.

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Answer:

Δx for Bugatti = 27.9m

Δx for Saleen = 32.6m

Explanation:

Answer:

Explanation:

Using the conservation of law of momentum which states that the sum of momentum of bodies before collision is equal to the sum of the bodies after collision.

Momentum = Mass (M) * Velocity(V)

BEFORE COLLISION

Momentum of 0.25kg body moving at 1.0m/s = 0.25*1 = 0.25kgm/s

Momentum of 0.15kg body moving at 0.0m/s(body at rest) = 0kgm/s

AFTER COLLISION

Momentum of 0.25kg body moving at x m/s = 0.25* x= 0.25x kgm/s

x is the final velocity of the 0.25kg ball

Momentum of 0.15kg body moving at 0.75m/s(body at rest) =

0.15 * 0.75kgm/s = 0.1125 kgm/s

Using the law of conservation of momentum;

0.25+0 = 0.25x + 0.1125

0.25x = 0.25-0.1125

0.25x = 0.1375

x = 0.1375/0.25

x = 0.55m/s

Since the 0.15 kg ball moves off to the right after collision, the 0.25 kg ball will move at 0.55 m/s towards the right

Distance traveled by the athlete in 80 seconds: (π ˣ 200 km) / 30 s ˣ 80 s, magnitude of displacement cannot be determined without direction.

To find the distance traveled by the athlete, we can use the formula:

The circumference of a circle is given by the formula:

Given that the diameter of the circular track is 200 km, we can calculate the circumference:

To find the distance traveled by the athlete in one complete lap, we use the formula:

To find the distance traveled by the athlete in one second, we divide the distance by the time taken:

Distance traveled in one second = Distance / Time

Given that the time taken is 30 s, we can calculate the distance traveled in one second:

Distance traveled in one second = (π ˣ 200 km) / 30 s

To find the distance traveled by the athlete in 80 seconds, we multiply the distance traveled in one second by 80:

Distance traveled in 80 seconds = (π ˣ 200 km) / 30 s ˣ 80 s

Now, to find the magnitude of the displacement of the athlete at the end of 308 seconds, we need to know the specific direction of the displacement.

Without that information, we cannot determine the magnitude of the displacement.

Therefore, the distance traveled by the athlete is (π ˣ 200 km) / 30 s ˣ 80 s, and the magnitude of the displacement cannot be determined without the direction of displacement.

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Answer:

pollination

Explanation:

it involves the transfer of a fertilized plant to another

Answer:

pollination

Explanation:

plants can't really do much without bees keep in mind

The CMB is characterized as having a temperature of 2.73 K because of the temperature drop that occurred after recombination due to adiabatic cooling. This cooling process caused the photons to lose energy, which resulted in the temperature of the universe dropping to 2.73 K over time.

The cosmic microwave background (CMB) is characterized as having a temperature of 2.73 K because of the temperature drop that occurred after recombination. Recombination occurred when electrons combined with nuclei to create neutral atoms, which allowed photons to travel without being scattered. At this time, the temperature of the universe was about 3000 K, and the photons were interacting with free electrons, which caused them to scatter. This resulted in the CMB being thermalized with a temperature equivalent to the temperature of the plasma, which was roughly 3000 K.

However, after recombination, the photons could travel freely, and the universe became transparent. The photons were no longer interacting with the plasma, and the temperature of the universe began to drop as it expanded. Over time, the photons lost energy due to this expansion and redshifted to longer wavelengths. This process is known as adiabatic cooling.

As the temperature of the universe decreased, the photons continued to redshift, eventually reaching a temperature of about 2.73 K, which is the temperature of the CMB that we observe today. This temperature is known as the blackbody temperature of the CMB, and it is a consequence of the adiabatic cooling that occurred after recombination.

Therefore, the CMB is characterized as having a temperature of 2.73 K because it represents the temperature of the universe after recombination and adiabatic cooling.

In summary, the CMB is characterized as having a temperature of 2.73 K because of the temperature drop that occurred after recombination due to adiabatic cooling. This cooling process caused the photons to lose energy, which resulted in the temperature of the universe dropping to 2.73 K over time.

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Answer:

I hope this helps ^^

Explanation:

If more factories start using large tanks of bacteria to remove carbon dioxide from the atmosphere, it would likely lead to a decrease in the overall amount of carbon dioxide in the atmosphere. Carbon dioxide is a greenhouse gas that contributes to the greenhouse effect, trapping heat in the Earth's atmosphere and causing global warming.

With a decrease in the amount of carbon dioxide, the total amount of energy in the Earth system would be affected. Carbon dioxide acts as a blanket, trapping heat from the sun and preventing it from escaping back into space. When the concentration of carbon dioxide decreases, less heat is trapped, resulting in a reduction of the total energy within the Earth system.

As for the global average temperature, the decrease in carbon dioxide levels would have a cooling effect on the planet. Since carbon dioxide is a major contributor to the greenhouse effect, its reduction would reduce the overall warming impact. This could lead to a decrease in the global average temperature, potentially slowing down or mitigating the rate of global warming.

However, it's important to note that the relationship between carbon dioxide levels, energy balance, and global temperature is complex and influenced by various factors. The impact of reducing carbon dioxide through bacteria tanks would depend on the scale of implementation, the effectiveness of the technology, and other factors that affect the Earth's climate system.

In ohms, the resistance of the unknown resistor is 6.19 amps.

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

Therefore in ohm's law, V = IR

V = voltage

I = current

R = resistance

To calculate the resistance, we have

R = V/I

where Voltage = 29.7

Current , I = 4.8

Resistance= 29.7/ 4.8 = 6.19 amps

In conclusion, Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit.

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The wrong statement is that sound waves created vibration Option A.

Sound is a type of waves that moves in compressions and rare factions. This implies that sound is a mechanical wave. Recall that a mechanical wave is one that requires a material medium for propagation. Now we know that if we set the medium into vibration, that is when the sound waves begins to vibrate. That brings us to the idea that it is the vibration that causes the sound waves and not the sound waves that creates the vibration.

Thus, knowing that sound is a mechanical wave which moves through solids liquids and gas and that the vibration of the source of sound is what causes the air to vibrate, we conclude that the wrong statement is that sound waves created vibration Option A.

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Answer:

a

Explanation:

The latent heat of fusion is 335714.29 J/kg.

To calculate the latent heat of fusion, we can use the equation:

Q = m * L

Where:

Q = heat energy transferred

m = mass of the substance

L = latent heat of fusion

Given:

Mass of water (m) = 700 g = 0.7 kg

Heat energy transferred (Q) = 235200 J

To find the latent heat of fusion (L).

Since the water is being transformed into ice, we know that the heat energy transferred during this phase change is equal to the latent heat of fusion.

Rearrange the equation to solve for L:

L = Q / m

L = 235200 J / 0.7 kg

L ≈ 335714.29 J/kg

Therefore, the latent heat of fusion is approximately 335714.29 J/kg.

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Answer:

d. distance travelled

Explanation:

answer

The zeroth law of thermodynamics states that two systems in thermal equilibrium with a third system are in thermal equilibrium with each other. The correct option is (c).

The zeroth law of thermodynamics states that two systems in thermal equilibrium with a third system are in thermal equilibrium with each other). This means that if two objects are each in thermal equilibrium with a third object, they are also in thermal equilibrium with each other, even if they are not in direct contact with each other. This is a fundamental principle of thermodynamics and allows for the definition of temperature and the measurement of thermal energy transfer.
                                                  The zeroth law is essential for defining temperature as a measurable quantity. When systems A and B are in thermal equilibrium with a third system C, it means that there is no net flow of heat between A and C, and B and C. As a result, systems A and B are also in thermal equilibrium with each other, indicating that they have the same temperature.

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Answer:

A (cytosine)

Explanation:

ACGT

Answer:

you can go to quizlet

Explanation:

When making a celestial sphere, one would need to mark the celestial north pole, which is directly over Earth's north pole. You'd also need to mark the celestial south pole, directly over Earth's south pole.

The celestial equator which is a projection of Earth's equator into space. Finally the ecliptic, which is the path the sun follows as it appears to circle around the celestial sphere once each year. All celestial bodies can be projected onto a hypothetical sphere called the celestial sphere, which is centered on the Earth.

The other half of the celestial sphere is below the horizon, so an observer on the surface of the Earth may only view half of it at any given time. Even though the Earth's rotation constantly reveals fresh areas of the celestial sphere, unless the observer is situated at the equator, there will always be a portion of the sphere that is hidden.

The celestial sphere seems to rotate every day from east to west because of how the Earth spins on its axis, and stars appear to move in a circle around two locations in the sky.

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