earth's magnetosphere is generated by question 12 options: 1) dynamo-like motions in earth's interior. 2) nuclear fusion in earth's core. 3) nuclear fission in earth's core. 4) gravitational accretion.

If the earth rotated slower about its axis, your apparent weight would increase, because we would experience less centrifugal force as the Earth rotated more slowly. Since gravity would remain constant but centrifugal force would decrease, the combined force of the Earth's gravity and centrifugal force would be greater.

What is centrifugal force?

A hypothetical force called centrifugal force, which is unique to particles traveling in a circle, is a force that has the same strength and dimensions as the centripetal force, but acts in the opposite direction.

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The work done by gravity on the sliding crate is approximately 147.55 Joules.

To find the work done by gravity on the sliding crate, we need to calculate the change in gravitational potential energy.

The gravitational potential energy is given by the formula:

PE = mgh

where m is the mass of the object, g is the acceleration due to gravity, and h is the vertical height.

In this case, the sliding crate moves up the ramp, so we need to consider the change in height along the incline.

The change in height, Δh, can be calculated using trigonometry:

Δh = d * sin(θ)

where d is the distance the crate moves along the ramp and θ is the angle of the ramp.

Mass of sliding crate, m1 = 14.80 kg

Mass of hanging crate, m2 = 16.30 kg

Angle of the ramp, θ = 36.9°

Distance moved along the ramp, d = 1.39 m

Acceleration due to gravity, g = 9.8\(m/s^2\)

First, calculate the change in height:

Δh = 1.39 m * sin(36.9°)

Next, calculate the work done by gravity:

Work = ΔPE = m1 * g * Δh

Substituting the values, we have:

Work = 14.80 kg * 9.8 \(m/s^2\) * Δh

Calculate Δh and substitute the value:

Work = 14.80 kg * 9.8\(m/s^2\) * (1.39 m * sin(36.9°))

Finally, calculate the value:

Work ≈ 147.55 J

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Answer:

B. Neutron has no charge

Answer:

B. Neutron

Explanation:

Firstly, the nucleus is what contains the protons and electrons, so it is not an atomic particle. The electron has a negative charge, and the proton has a positive charge (you can remember this by looking at its prefix 'pro'). This means the neutron has no charge (think of it as neutral).

(a) The magnetic force experienced by the wire when it perpendicular is 0.01 N.

(b) The magnetic force experienced by the wire when the angle is  30⁰ is 5 x 10⁻³ N.

(c) The magnetic force experienced by the wire when it parallel is 0 N.

The magnetic force experienced by the wire is calculated by applying the following;

F = BIL x sin(θ)

where;

When the angle of inclination is perpendicular,  

F = 1 x 10⁻² x 10 x 0.1 x sin(90)

F = 0.01 N

When the angle of inclination is 30⁰,

F = BIL x sin(θ)

F = 1 x 10⁻² x 10 x 0.1 x sin(30)

F = 5 x 10⁻³ N

When the wire is parallel, the angle is 0⁰,

F = BIL x sin(θ)

F = 1 x 10⁻² x 10 x 0.1 x sin(0)

F = 0 N

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Answer:

mass = 0.14kg

Explanation:

kinetic energy (K.E.) = ( m / 2 ) v^2

where,

m = mass ( kg )

K.E. = kinetic energy ( J )

v = velocity ( m / s )

note that the question does not have a velocity factor in it

but, we are just going to use the speed parameter for velocity since they have the same units ( m / s )

from our question,

m = unknown ( but for solution purposes, we will just call it x)

K.E = 3.10J

v = 6.70 m / s

from our formula,

we substitute our values to have;

3.10 = ( x / 2 ) 6.70^2

3.10 = ( x / 2 ) 44.89

when we open the bracket, 44.98 will multiply with x to give

3.10 = 44.89x / 2

we cross multiply to give us

44.89x = 3.10 ( 2 )

44.89x = 6.20

divide through by 44.89 to give us,

44.89x / 44.89 = 6.20 / 44.89

x = 0.14kg

The mass of the object if the acceleration of a mass is 15 m/s^2 to the left is 1.27 kg

F = F1 + F2 + F3

F1 = - 8 N

F2 = 7 N

F3 = - 18 N

F = - 8 + 7 - 18

F = - 19 N

Negative symbol indicates that the force is acting towards the left.

F = m a

F = Force

m = Mass

a = Acceleration

a = - 15 m / s²

m = F / a

m = - 19 / - 15

m = 1.27 kg

Therefore, the mass of the object is 1.27 kg

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Answer:

100

Explanation:

cause power equal to work over time

the total amount of energy coming from the Sun is approximately 1361 watts per square meter.

The sun is a powerful source of energy that emits radiation in all directions. This radiation includes visible light, ultraviolet light, and infrared radiation. The amount of energy that reaches the Earth's surface depends on several factors, including the distance between the Earth and the sun, the angle at which the radiation strikes the Earth's surface, and atmospheric conditions.

Scientists have calculated the total amount of energy that the sun emits per unit of time, which is known as the solar constant. The solar constant is approximately 1,366 watts per square meter. This means that if you could capture all of the energy from the sun that falls on a square meter of the Earth's surface, it would generate 1,366 watts of power.

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Answer:

Conductors of electricity?

The Answer is C metal :)

xXxAnimexXx

The centripetal force (Fc) of the ball is 0.64N.

Centripetal force is the force on a rotating or orbiting body in the direction of the centre of rotation.

Centripetal force is a force that makes a body follow a curved path. Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path.

Centripetal force formula is given as the product of mass (in kg) and tangential velocity (in meters per second) squared, divided by the radius (in meters) as follows:

Fc = mv²/r

Where;

According to this question, a boy spins a ball on a string over his head with a rotational velocity of 6.3m/s. The length of the string is 0.50 m and the mass of the ball is 0.008 kg. The centripetal force is as follows:

Fc = 0.008 × 6.3²/0.5

Fc = 0.31752 ÷ 0.5

Fc = 0.64N

Therefore, 0.64N is the centripetal force of the ball.

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The theoretical efficiency is greater than that of the actual efficiency of the engine. This is because heat engine always produces some waste heat.

The Second Law of Thermodynamics states that a heat engine cannot be 100% efficient. In practice, a heat engine is only 100% efficient when it is operating at about 30-50% efficiency.

If we were to multiply this by 100, we would get the efficiency as a percent: 49%. This is the theoretical maximum efficiency. If we were to actually build an engine, it would be less efficient than the theoretical engine. The theoretical engine that can achieve this theoretical maximum efficiency is called the Carnot Engine.

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Answer: Convection

Explanation:  convection is the most present process in the refrigeration equipment you may deal with. It occurs mainly in the fluids

Answer:

F = 0.414 N

Explanation:

Given that,

Magnetic flux density,\(B=3.6\times 10^{-2}\ T\)

The length of the wire, l = 24 m

Current, I = 0.48 A

We need to find the force acting on the wire. The formula for the force is given by:

\(F=ILB\)

Put all the values,

\(F=0.48\times 24\times 3.6\times 10^{-2}\\\\F=0.414\ N\)

So, the force acting on the copper wire is equal to 0.414 N.

The magnetic force of the copper wire is  41.472 N.

The magnetic force of the copper wire is calculated by applying the following equation.

F = BIL x sinθ

Where;

F = (3.6 x 10⁻²) x (48) x 24 x sin(90)

F = 41.472 N

Thus, the magnetic force of the copper wire is  41.472 N.

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Answer:

2 meter per second

Explanation:

kinetic energy = 1/2 m v^2

20J = 1/2 × 10 × v^2

v^2 = 4

v= 2 m/s

Answer:

One of the more important properties of sound is that its speed is nearly independent of frequency. ... Therefore, the relationship between f and λ is inverse: The higher the frequency, the shorter the wavelength of a sound wave. The speed of sound can change when sound travels from one medium to another.

We need to verify the thrid equation of kinematics here

\(\\ \tt\longmapsto v^2-u^2=2as\)

\(\\ \tt\longmapsto 20^2=2(-8)s\)

\(\\ \tt\longmapsto 400=-16s\)

\(\\ \tt\longmapsto s=|400/-16|\)

\(\\ \tt\longmapsto s=25m\)

The squirrel has a good luck ,Car gets stopped just 1m away from the squirrel .

Explanation:

According to the Question

A squirrel runs out in front of a car moving at +20m/s ( initial speed u) . The driver slams on the brakes and begins decreasing at -8m/s² ( here the acceleration is acting in opposite directions of motion a )

When Squirrel was 26 metres ( Distance from the car initially )

Using Kinematic Equation

On substituting the value we obtain

➥ 0² = 20² + 2 × -8 × s

➥ 0 = 400 - 16 × s

➥ -400 = -16 × s

➥ 400/16 = s

➥ 25 = s

So, the squirrel is 25 metres from the car .

Amphibians retain a set of gills their whole lives that help them to breathe in the water. So, the correct option is D.

Amphibians are defined as the class of cold-blooded vertebrates which is made up of frogs, toads, salamanders, newts, and caecilians. All amphibians that spend part of their lives in water and part of their lives on land.

Amphibians are born with gills, and some outgrow them when they become adults while others retain them for their entire lives.

Thus, the correct option is D.

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Stars form from molecular clouds through a process known as stellar formation.

These clouds, characterized by low temperatures and high densities, provide the ideal conditions for atoms to combine and form molecules. With a mass range spanning from a few solar masses to millions of solar masses, molecular clouds serve as the birthplaces of new stars. The Pleiades cluster serves as a notable example of stars that have recently formed within such a stellar nursery.

The formation of stars from molecular clouds involves several key steps. Firstly, gravitational forces acting on regions of higher density within the cloud cause them to collapse under their own gravity. As the cloud collapses, it begins to fragment into smaller, denser clumps called protostellar cores. These cores continue to collapse, and their central regions become increasingly dense and hot. At this stage, they are known as protostars.

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Answer:

This difference is kept to a minimum because the resistance in transformers is a few tens of ohms and the resistance of modern voltmeters is of the order of MΩ.

Explanation:

A voltmeter is built by a galvanometer and a resistance in series, this set is connected in parallel to the resistance where the voltage is to be measured, therefore the voltage is divided between the voltmeter and the element to be measured, consequently the measured voltage It is less than the calculated one, since for them the resistance of the voltmeter is assumed infinite.

This difference is kept to a minimum because the resistance in transformers is a few tens of ohms and the resistance of modern voltmeters is of the order of MΩ.

Out of 150 approved mortgage applications, a random sample may have variable or interest-only mortgages.

we are given that a random sample of 150 approved mortgage applications is either variable or interest-only mortgages. A variable mortgage, also known as an adjustable-rate mortgage (ARM), is a type of mortgage in which the interest rate fluctuates based on market conditions. An interest-only mortgage is a type of mortgage in which the borrower only pays interest on the loan for a certain period of time before beginning to make principal payments.To determine what percentage of the sample is variable or interest-only mortgages, we would need more information on the breakdown of the sample. However, we know that these are two different types of mortgages that borrowers can choose from when applying for a mortgage.

A home loan application is a report submitted to a bank when you apply for a home loan to buy land. The application is extensive and includes information about the borrower's employment history, financial situation, and the property being considered for purchase, among other things.

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To determine whether the speed of the center of mass of the two-block system is either constant or not constant during the time interval from t2 to t4,

we need to consider the forces acting on the blocks and their motion during this period.

Step 1: Identify the forces acting on the blocks during the time interval from t2 to t4.

Step 2: Determine if there is a net external force acting on the system during this time interval.

Step 3: Analyze the motion of the center of mass of the system based on the net external force.

If there is no net external force acting on the two-block system during the time interval from t2 to t4, the speed of the center of mass will remain constant, as per the conservation of linear momentum.

This is because, in the absence of an external force, the internal forces acting between the blocks will cancel each other out, resulting in no change in the overall momentum of the system.

However, if there is a net external force acting on the system during this time interval, the speed of the center of mass will not be constant.

This is because the external force will cause the system's momentum to change, resulting in a change in the speed of the center of mass.

In conclusion, the speed of the center of mass of the two-block system is either constant or not constant during the time interval from t2 to t4, depending on the presence or absence of a net external force acting on the system.

If there is no net external force, the speed remains constant; otherwise, it will not be constant.

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Answer:

Carbon (see below)

Explanation:

To identify an element on the period table, you can use its atomic number—or its number of protons.

The atomic number of an element is located in the upper left-hand corner of each square in the periodic table. Refer to IMAGE.A for more info.

If you look at the periodic table, you can spot carbon in the nonmetals.

Carbon's upper left-hand corner has a 6. Refer to IMAGE.B for more info.

Answer:

gsg

Explanation:

The balloons with negative charges moves apart from each other by electrostatic force of repulsion. The potential energy in them increases as they move away.

The basic principle of charges is that, two like charges repel and unlike charge attracts. That is: two negative charged bodies or two positively charged bodies will repel each other and one negative charged body attracts a positively charged body.

In both cases attraction or repulsion the charged particles exerts a force with each other called the electrostatic force. The electrostatic force between two charges is directly proportional to the magnitude of charges and inversely proportional to the distance between them.

The balloons with negative charges moves apart from each other by electrostatic force of repulsion. The potential energy in them increases as they move away.

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Answer:William Herschel found the seventh planet now known as uranus

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Explanation:

Answer:

William Herschel

Explanation:

2.50 kg of water requires 832 kJ of heat to melt at its melting point.

Q=mL Q = m L, where m is the mass of the substance and L is the latent heat of fusion (for a solid-liquid transition) or vaporization, is the equation describing the amount of heat needed to change a substance's phase (for a liquid-gas transition).

Calculation:

It is given that,

Water weight, m = 2.5 kg

L = 333 kJ/kg is the latent heat of fusion.

We must determine the temperature required to melt water at that temperature.

Q = mL

Q = 2.5 × 333 kJ/kg

Q = 832.5kJ/kg.

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The answer is C) CH3COO-. This is because the negative charge is delocalized over the two oxygens, making the species more stable and less likely to accept a proton. In water, a stronger base is one that is less likely to accept a proton (H+) and more stable in solution.

The delocalization of the negative charge over the two oxygens in CH3COO- makes it more stable compared to CH3O-, where the negative charge is localized on the oxygen atom. The stability of CH3COO- is due to resonance structures that can be drawn for the molecule, which distribute the negative charge over the two oxygen atoms. This makes CH3COO- a weaker base in water compared to CH3O-, which has a localized negative charge and is more likely to accept a proton. In summary, the stronger base in water is the one that is more stable and less likely to accept a proton, and in this case, it is CH3COO-.

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Answer:

a

Explanation:

Answer:

The deltoid muscle is a large triangular shaped muscle associated with the human shoulder girdle, explicitly located in the proximal upper extremity.

Explanation:

The direction of the acceleration of the crate is in the southwest direction.

To determine the direction of acceleration, we can use vector addition. The force of 6.0 N to the north can be represented as (0, 6.0) N (with the y-axis pointing north), and the force of 8.0 N to the west can be represented as (-8.0, 0) N (with the x-axis pointing east). We can add these two vectors to find the net force acting on the crate.

Adding the x-components (-8.0) and the y-components (6.0), we get a resultant force of (-8.0, 6.0) N. This means the crate will experience an acceleration in the southwest direction, which can be described as the resultant force pointing towards the southwest relative to the initial position of the crate.

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