in three to five complete sentences, explain why the magnetic north pole is not always in the same spot on different maps. remember to use proper grammar and mechanics when writing your sentences.

The two general ways to increase the internal energy of a substance, as stated by the first law of thermodynamics, are through heat transfer (Q) and work done (W).

According to the first law of thermodynamics, the change in internal energy (ΔU) of a system is equal to the heat transferred to the system (Q) minus the work done by the system (W).

Mathematically, it can be expressed as ΔU = Q - W.

1. Heat transfer (Q): Heat can be transferred to a substance, increasing its internal energy. Heat transfer can occur through conduction, convection, or radiation. For example, if a substance is heated by placing it on a hot stove, heat is transferred to the substance, leading to an increase in its internal energy.

2. Work done (W): Work can be done on a substance, causing an increase in its internal energy. This can be achieved through mechanical processes such as compression or expansion. For instance, when a gas is compressed, work is done on the gas, increasing its internal energy.

Therefore, the first law of thermodynamics allows for increasing the internal energy of a substance either by transferring heat to it or by doing work on it.

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Complete question here:

What are the two general ways to increase the internal energy of a substance according to the first law of thermodynamics?

The new angular velocity of the two disks is lower than the initial angular velocity of the first disk. This is because the moment of inertia of the combined system (the two disks) is higher than the moment of inertia of the first disk alone. When the second disk is added, the total moment of inertia increases, which means that more torque is required to maintain the same angular velocity.

However, since the system is still rotating with uniform angular velocity, the torque must remain constant. This means that the new angular velocity is lower in order to compensate for the increased moment of inertia. The exact relationship between the old and new angular velocities depends on the masses and radii of the disks, as well as the initial angular velocity of the first disk.

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Answer:

17.565 kgm/s

Explanation:

Momentum = mass × velocity

I = mv..................... Equation 1

But we can calculate the value of v  using the equation of motion under gravity.

v² =  u²+2gs............. Equation 2

Where u = initial velocity, s = maximum heigth, g = acceleration due to gravity.

Given: u = 0 m/s (at the maximum heigth), s = 7.0 m.

Constant: g = 9.8 m/s²

Substitute these values into equation 2

v² = 0²+ 2×7×9.8

v² = 137.2

v = √137.2

v = 11.71 m/s.

Also given: m = 1.50 kg

substitute these values into equation 1

Therefore,

I = 1.5×11.71

I = 17.565 kgm/s

(a) To calculate the interior volume of the tank, we need to convert the given volume of 50 standard cubic feet of air to the corresponding volume at the given temperature and pressure. Since a standard cubic foot of air occupies one cubic foot at standard temperature and pressure (STP), we can directly use the given volume. Therefore, the interior volume of the tank is 50 cubic feet.

The volume of a cylinder is given by the formula V = π * r^2 * h, where V is the volume, r is the radius, and h is the height (inner length) of the tank. In this case, the height is given as 1.25 feet.

To find the inner diameter of the tank, we need to solve for the radius using the formula r = √(V / (π * h)), where V is the volume and h is the height. Substituting the values, we get r = √(50 ft³ / (π * 1.25 ft)).

Calculating this value, we find that the radius is approximately 3.19 feet. Since the diameter is twice the radius, the inner diameter of the tank is approximately 6.38 feet.

(b) To determine the wall thickness of the tank in order for it to be neutrally buoyant, we need to consider the buoyant force acting on the tank. The buoyant force is equal to the weight of the fluid displaced by the tank.

Given that the tank is made of aluminum with a density of 2700 kg/m³, we can calculate the weight of the displaced fluid using the formula weight = density * volume * gravitational acceleration. In this case, the volume is equal to the interior volume of the tank, which is 50 cubic feet.

To convert the volume to cubic meters, we multiply by the conversion factor (0.0283168 m³/ft³) to obtain approximately 1.416 m³. Therefore, the weight of the displaced fluid is approximately 2700 kg/m³ * 1.416 m³ * 9.8 m/s².

To achieve neutral buoyancy, the weight of the tank should be equal to the weight of the displaced fluid. Thus, the wall thickness of the tank should be adjusted to make the weight of the tank approximately equal to the weight of the displaced fluid, taking into account the density and the interior volume of the tank.

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Answer:

672000 J.

Explanation:

From the question,

q = cm(t₂-t₁)............................ Equation 1

Where q = heat energy supplied to the water, c = specific heat capacity of water, m = mass of water, t₂ = final temperature, t₁ = Initial temperature.

Given: m = 8.0 kg, c = 4200 J/kg°C, t₂ = 40°C, t₁ = 20°C

Substitute these values into equation 1

q = 8×4200×(40-20)

q = 8×4200×20

q = 672000 J.

Hence the energy suplied to the water is 672000 J.

Answer:

C

Explanation:

Answer:

That rule describes how a charged particle (our electron) moving in a magnetic field will be deflected by that field at a right angle to both the field and to the direction of the particle. ... The electrons in the cathode rays would deflect toward the positively charged plates, and away from the negatively charged plates.

Explanation:

ur welcome

Answer:

yea, force is mass x acceleration

Answer:

a = - 11.53[m/s^2]

Explanation:

The airplane slows down as its speed decreases from the initial value of 610 [m/s] to zero.

To calculate the acceleration value we use the following kinematics equation:

\(v_{f} = v_{i}+(a*t)\\\)

where:

Vf = final velocity = 0

Vi = initial velocity = 610 [m/s]

a = acceleration [m/s2]

t = time = 53 [s]

Now replacing:

0 = 610 + (a*53)

-610 = 53*a

a = - 11.53[m/s^2]

The negative sign means that the aircraft is losing speed, i.e. slowing down

Answer:

yes

Explanation:

This will change cause of the increase in her speed.

Answer:

I believe A would be the best answer

Explanation:

Cell transport means things entering and leaving the cell, this would be controlled by the cell membrane

Waste excretion is controlled by the vacuole

Energy production is the mitochondria (the mitochondria is the power house of the cell)

Life functions include cellular reproduction and the nucleus contains the genetic information to do this

Answer:

a

Explanation:

The number of constructive interference points enclosed between two speakers is 9. It can be calculated by using wave length formula.

From the question, we can get information:

F = 500 Hz

2 speakers were separated 6 m, so d= 6 m

V = 331 m/s

We can get the wavelength of sound by the formula:

λ= v/f

   = 331/500

   = 0.662 m

Since the separation between any two consequent constructive interference point = λ

Since both the waves are emitting sound waves in phase the total number of constructive interference points which can fit in between the separation between speakers = n

nλ = d

so n = d/λ

= 6/0.662

= 9.0634

= 9

So The number of constructive interference points enclosed between two speakers is 9

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The height from which the flare was released is approximately 517.6 meters. The velocity vector of the flare just before hitting the ground is approximately 100 meters per second at an angle of 15.0 degrees below the horizontal. The horizontal distance traveled by the flare while in the air is approximately 750 meters.

To solve this problem, we can break it down into two components: vertical and horizontal. Let's start with part (a), determining the height from which the flare was released. We know that the flare was in the air for 7.50 seconds, and we can use the formula for vertical displacement:

y = y0 + v0y * t + (1/2) * a * t^2

Since the flare is released horizontally, its initial vertical velocity (v0y) is 0. We can ignore the acceleration due to gravity (a) in this case since we're not considering air resistance. Rearranging the equation, we have:

y = y0

Therefore, the height from which the flare was released is equal to the displacement in the y-direction, which is given by:

y0 = (1/2) * g * t^2 = (1/2) * 9.8 m/s^2 * (7.50 s)^2 ≈ 517.6 m

Moving on to part (b), we need to determine the velocity vector of the flare just before hitting the ground. The horizontal velocity (v0x) remains constant throughout the motion, while the vertical velocity (v0y) changes due to the acceleration of gravity. The horizontal velocity is given as 100 meters per second, and the angle below the horizontal is 15.0 degrees. We can calculate the vertical velocity as:

v0y = v0 * sin(θ) = 100 m/s * sin(15.0°) ≈ 25.96 m/s

Thus, the velocity vector of the flare just before hitting the ground is approximately 100 m/s at an angle of 15.0 degrees below the horizontal.

Finally, for part (c), we need to determine the horizontal distance traveled by the flare. The horizontal distance (d) is given by:

d = v0x * t = 100 m/s * 7.50 s = 750 m

Hence, the horizontal distance traveled by the flare while in the air is approximately 750 meters.

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The planetary body with the fastest orbit is Mercury, and the one with the slowest orbit is Neptune.

There is a general pattern between orbital velocity and orbital radius known as Kepler's second law of planetary motion. According to this law, a planet sweeps out equal areas in equal times as it orbits the Sun. This implies that planets closer to the Sun have smaller orbital radii and must travel faster to cover the same area in the same amount of time.

The relationship between orbital velocity and orbital radius can be expressed as v ∝ 1/r, where v represents the orbital velocity and r denotes the orbital radius. This relationship shows that as the orbital radius increases, the orbital velocity decreases. In other words, planets farther from the Sun have slower orbital velocities compared to those closer to the Sun.

This pattern is consistent with observations in our solar system. The inner planets, such as Mercury, have smaller orbital radii and faster orbital velocities, while the outer planets, like Neptune, have larger orbital radii and slower orbital velocities.

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Answer:

Mass and volume

Explanation:

Density is determined by two types of measurements mass and volume. The resulting density value is typically expressed in units such as grams per cubic centimeter (g/cm³) or kilograms per liter (kg/L).

Density is determined by two types of measurements:

Mass: Mass is the amount of matter present in an object. It is typically measured in units such as grams (g) or kilograms (kg).

Volume: Volume is the amount of space occupied by an object. It can be measured in units such as cubic centimeters (cm³) or liters (L).

To calculate density, you divide the mass of an object by its volume. The formula for density is:

Density (ρ) = Mass (m) / Volume (V)

The resulting density value is typically expressed in units such as grams per cubic centimeter (g/cm³) or kilograms per liter (kg/L).

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Answer:

Initially the acceleration is acceleration due to gravity and after that it is zero.

Explanation:

Describe the changes in speed and acceleration during the stages of a parachute jump. Jump from plane

As the person jump with the parachute and till the parachute is not opened, then in this condition, the acceleration is acceleration due to gravity due to which he moves in the downwards direction.

As the parachute is opened, the drag force of air and the buoyant force due to the air acts on the parachute in the upwards direction. So, the net acceleration is zero ad the force due to the gravity is balanced by the drag force and the buoyant force and thus the acceleration if zero and the person is safe.  

Answer:

Subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle. Regions where this process occurs are known as subduction zones.

Answer:

repel , attract,l am sure with these two blanks only

Answer:

Magnetic fields

A magnet creates a magnetic field around it. You cannot see a magnetic field, but you can observe its effects. A force is exerted on a magnetic material brought into a magnetic field. The force is a non-contact force because the magnet and the material do not have to touch each other.

The movement of the plates may lead to or cause an earthquake.

At convergent boundaries, two tectonic plates are moving towards each other. There are three types of convergent boundaries, characterized by the type of plates involved: Oceanic-Oceanic Convergence, Oceanic-Continental Convergence, Continental-Continental Convergence.

At divergent boundaries, two tectonic plates are moving away from each other. This type of boundary is often associated with seafloor spreading, where new crust is formed as magma rises to the surface and solidifies. Divergent boundaries on land can result in the formation of rift valleys and volcanoes.

At transform boundaries, two tectonic plates are sliding past each other. These boundaries are characterized by lateral movement and can result in earthquakes

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Remember to use the correct units to solve the problem

It is possible to suspend an object at rest from its center of gravity, and gravity won't induce it to begin rotating no matter how it is positioned.  

Thus, The center of gravity of an object will be located somewhere along a vertical line that passes through the point of suspension if you suspend it from any point and allow it to come to rest.

The gravitational acceleration is (almost) constant near the surface of the earth, where the center of mass also lies.

A place that represents the average or typical location of an object's mass, as if all of the mass were contained there, is known as the center of mass (CM). The geometric center of a uniform sphere serves as its center of mass. The barycenter is another name for the CM.

Thus, It is possible to suspend an object at rest from its center of gravity, and gravity won't induce it to begin rotating no matter how it is positioned.  

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Answer:

Given,

load=300N

Load Distance=40 cm

Effort Distance = 60 cm

Formula used,

Load × load distance = Effort × effort distance

Effort = load × load distance/ effort distance

M.A=load/effort

V.R=effort distance/load distance

Answer:

it's true I'm pretty sure

Answer:

the answer is true.I'm sure

Answer:

It is a renewable resource as it renewably heats up water to a high temperature. Geothermal energy is more environmentally friendly than conventional fuel sources such as coal and other fossil fuels. In addition, the carbon footprint of a geothermal power plant is low.

Disadvantages: If dug deep underground, it can cause earthquakes. generates waste, reservoirs require proper management, it's location-specific, has high initial cost

Explanation:

from the given choices it can only be

the shape of Earth.

at any moment of time, because of the ball shape, there are areas on Earth in full, direct sunlight, areas with dimmer light due to narrower angles of sight to the sun, and areas without any light ("night").

what I am missing here is the inclination of the Earth's rotational axis towards its orbital plane around the sun. that is what changes the angle is sunlight over the year in general creating the seasons in the 2 hemispheres.

Answer: The shape of the Earth

Explanation:

I took the test duh

The blower uses 100 volts of the difference in potential when consumes current of 3 c/s in a time of 5.10min

The bulb is filled with a gas, typically a mixture of nitrogen and argon, that reduces the oxygen in the bulb to help stop the filament from burning. A filament with a high electric current resistance is made of a special wire, usually tungsten.

First, we should convert the power and the time:

Power of blower = 3.0 x 10² J/s

                         = 3.0 x 10² W

Time = 5.10 min

                         = 5.10 x 60 s

                                 = 306 s

Now, Charge = I × t

                        = 3 A × 306 s

                                      = 918 C

Finally, we can calculate the potential difference consumed:

                             ΔV = P × t / Q

                          ΔV = (3.0 x 10² W) × (306 s) / (918 C)

                               ΔV = 100 V

An electrical circuit is completed when a switch is turned on, allowing electric current to flow through its wires. Through the switch, along the wires, and into the light bulb, the current flows from the power source.

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The specific gravity can be calculated by dividing the density of a substance by the density of water. This can be done using the formula is Specific gravity = density of substance / density of water On the other hand, a hydrometer is a device that is used to measure the specific gravity of a liquid.

It works on the principle of buoyancy, where a submerged object experiences an upward force equal to the weight of the liquid it displaces. The calculated specific gravity and the hydrometer reading should be very close to each other. There may be slight differences due to factors such as temperature, calibration errors, and the accuracy of the instruments used.

Both the calculated specific gravity and the hydrometer reading provide information about the density of a liquid, but the hydrometer is a more precise method of measurement as it takes into account any variations in temperature and calibration errors.

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Each magnetic field contains energy, also called magnetic energy. ... Because a magnetic field is generated by electric currents, the magnetic energy is an energy form of moving charge carriers (electrons). To understand where this energy comes from, it's worth taking a look at how a magnetic field works.

Chemical energy, Energy stored in the bonds of chemical compounds. Chemical energy may be released during a chemical reaction, often in the form of heat; such reactions are called exothermic. ... The chemical energy in food is converted by the body into mechanical energy and heat.