Kepler's First Law: A planet orbiting the star is at a
distance of 500,000 km away from it and 300,000 km away from f2.
The distance between the two foci is 400,000km. Find the aphelion
and perihelion

Answer:

3000g

hope this helps<3

Given,

Weight of a block on the Earth = 980 N

Acceleration due to gravity on Earth = 9.8 N/kg

To find,

Weight of the block on the moon.

Solution,

The  moon has acceleration (1/6) times that on earth. Let m be the mass of the block on the moon.

We know that,

W = mg

\(m=\dfrac{W}{g}\\\\m=\dfrac{980}{9.8}\\\\=100\ kg\)

As mass of an object remains the same everywhere. Weight of the block on Moon is :

W' = mg'

As g'=(g/6)

So,

\(W=100\times \dfrac{g}{6}\\\\=100\times \dfrac{9.8}{6}\\\\=163.33\ N\)

So, the weight of the block on the moon is 163.33 N.

Answer:

Nuclear Fusion

Explanation:

Nuclear fusion is the nuclear reaction in which two lighter nucleus combine to form a larger more stable nucleus with the release of energy.

²₁H + ¹₁H ⇒ ³₂He + energy

In this case, a hydrogen atom reacts with a deuterium atom to produce a helium atom and energy.

Since two smaller atoms combine to produce a larger atom, nuclear fusion occurs.

Answer:

Fusion

Explanation:

Fusion but nuclear fusion is right but only fusion for APE X is needed

The data displayed the expected relationship between the centripetal force and angular speed of the rotation. Increasing the angular speed led to a proportional increase in the centripetal force, indicating a direct relationship between the two variables.

This relationship was supported by the experimental evidence obtained in the investigation. When the mass was changed while keeping the radius constant, the centripetal force increased as the mass increased.

Similarly, when the radius was changed while keeping the mass constant, the centripetal force increased as the radius increased. These observations demonstrate that both mass and radius have a direct effect on the required centripetal force to maintain a certain angular speed.

In the experiment, the relationship between centripetal force and angular speed was confirmed. As the angular speed increased, the centripetal force also increased proportionally. This relationship was evident through the data collected during the investigation. When the mass was altered while maintaining a constant radius, an increase in mass resulted in a corresponding increase in the required centripetal force. Likewise, when the radius was modified while keeping the mass constant, an increase in radius led to a greater centripetal force.

These experimental observations support the notion that both mass and radius directly influence the amount of force required to achieve a specific angular speed.

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Answer:

As there are two objects applying forces to each other they must be equal and opposite.

Thus the force on your foot will be precisely 26.3N in a direction  

180

∘

to the direction of travel of the ball.

Explanation:

Here we can study the different temperatures of each one of the layers of the sun.

We will find that the way that the scientist can identify which layer are they studying is "The lowest temperatures are from the photosphere."

A brief description of the temperature of each layer is:

Center of the sun: about 15 million K

Radiative Zone:  Goes from 7 million K to 2 million K.

Convection Zone: goes from 2 million K to 5800K

Photosphere: Is in average 5800 K , but there are sunspots with lower temperatures, of around 3800 K.

Chromosphere: goes from 4300 K to  8300 K

Corona: Around 2 million K.

So now we can analyze each of the options to see which ones make sense.

A) The highest temperatures are from the corona.

This is false, we can see that in the center and in the radiative zone we have larger temperatures than in the corona.

B) The lowest temperatures are from the photosphere.

While on average the temperature of the photosphere is larger than the smaller temperature of the chromosphere, in the photosphere we have the sunspots, and there we have the smallest temperatures in the whole sun, so this is true.

C) The lowest temperatures are from the core (or center).

Clearly false, there we have the larger temperatures.

D)  The highest temperatures are from the radiative zone.

Again false, the larger temperatures are in the center.

So the only true option is "The lowest temperatures are from the photosphere."

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Answer:

The lowest temperatures are from the photosphere

Explanation:

I just took this quick check on connexus

The electric field at the electron's position depends on the distance between the positive charge and the electron, the charge on the electron, and the charge of the positive charge.

Electric field (or electric force field) is an invisible area of influence created by electric charges. It affects the behavior of charged objects in the vicinity of the field. The magnitude and direction of the electric field is expressed by a vector field, which describes the force exerted on a charged particle at any given point in space. Electric fields are created by the presence of stationary electric charges and by changing magnetic fields. The strength of the electric field decreases with distance from the source. Electric fields are used in a variety of applications, such as in electric motors, sensors, and communications.

It does not depend on the mass of the electron, the mass of the positive charge, the radius of the positive charge, or the radius of the electron.

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The dose in a thin LiF dosimeter struck by a fluence of 3*10^11 e/cm^2 with t0=20 MeV is 0.00796 Gy.
To determine the dose (Gy) in a thin LiF dosimeter struck by a fluence of 3*10^11 e/cm² with an initial energy (T0) of 20 MeV, you would need to know the energy deposition per unit mass (in J/kg or Gray) and the mass of the dosimeter.

Here's a brief explanation of the terms:

- Dose: It is the energy absorbed per unit mass, measured in Gray (Gy). In this context, it refers to the energy absorbed by the dosimeter from the fluence of particles.

- Dosimeter: A device that measures the absorbed dose of ionizing radiation. In your case, it's a thin LiF dosimeter.

- Fluence: The number of particles (such as electrons) incident on a specific area per unit area, measured in particles/cm². In your example, it is 3*10^11 e/cm².

To find the dose (Gy), you would need more information about the energy deposition per unit mass and the mass of the dosimeter.

To calculate the dose in a thin lif dosimeter struck by a fluence of 3*10^11 e/cm^2 with t0=20 mev, we need to use the following formula:

Dose (Gy) = Fluence (electrons/cm^2) * Conversion Factor * Energy Deposition Coefficient

The conversion factor for electrons in the air is 0.876 Gy/electron/cm^2, and the energy deposition coefficient for lithium fluoride (LiF) is 1.21 eV/electron. Therefore:

Dose (Gy) = 3*10^11 e/cm^2 * 0.876 Gy/electron/cm^2 * (20 MeV * 1.6*10^-19 J/electron) / (1.21 eV/electron * 1000 J/Gy)

Simplifying the units, we get:

Dose (Gy) = 3*10^11 * 0.876 * 20 * 1.6*10^-19 / 1.21 / 1000
Dose (Gy) = 0.00796 Gy

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No, the light emitted from the source is not polarized

Bypassing it through a polarizing filter or other polarizing substance, light can be made polarized. After passing through a polarizing filter, the intensity of polarized light I is equal to the original intensity I0 cos2, where I0 is the original intensity and is the angle formed by the polarization's direction and the filter's axis.

Unpolarized light is diminished by a factor of 12 when it travels through a polarizer. Along the polarizer's axis, the transmitted light is polarized. The only parameter that is unaffected by any phenomenon, including reflection, refraction, interference polarization, etc., is frequency. The polarization phenomenon has no effect on light frequency.

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The acceleration of a self-propelled vehicle of mass m, whose engine delivers a constant power p, is given by the equation a = p / (m × v). By understanding this relationship, we can analyze and predict the behavior of the vehicle based on its power, mass, and velocity.

A self-propelled vehicle of mass m, whose engine delivers a constant power p, has an acceleration a.
To understand the relationship between the mass of the vehicle, the power of the engine, and the acceleration, we can use the equation:

P = F × v

Where P is the power, F is the force, and v is the velocity of the vehicle. Since the vehicle is self-propelled, the force F is equal to the product of the mass m and the acceleration a:

F = m × a

Combining these equations, we have:

P = m × a × v

Since the engine delivers a constant power p, we can rewrite the equation as:

p = m × a × v

Now, if we want to find the acceleration a, we can rearrange the equation as:

a = p / (m × v)

This equation tells us that the acceleration of the vehicle depends on the power of the engine, the mass of the vehicle, and the velocity. If any of these factors change, the acceleration will also change accordingly.

In conclusion, the acceleration of a self-propelled vehicle of mass m, whose engine delivers a constant power p, is given by the equation a = p / (m × v). By understanding this relationship, we can analyze and predict the behavior of the vehicle based on its power, mass, and velocity.

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Answer:

False

Explanation:

This depends on how much air is in the ball, I think

Answer:

prefix that means 1/100 = Centi

prefix that means 1,000 = Kilo

prefix that means 1/1000 = Milli

Explanation:

Answer:

Example for 1. Law of Inertia

Falling forward while getting down from a moving bus:

When a passenger gets down from a moving bus, their upper body is still in motion, and when it comes in contact with the ground which is at rest, their body topples forward due to the inertia of motion.

Example for 2. Law of Acceleration

Hitting a Ball:

A ball develops a certain amount of acceleration after being hit. The acceleration with which the ball moves is directly proportional to the force applied to it. This means that the harder you hit the ball, the faster it will move

Example for 3. Law of Interaction

Walking:

Whenever people walk, their foot exerts a force on the ground. The ground then exerts an equal force which points in the opposite direction. It is this force (force due to friction) that allows the person to move forward.

Example for 4. Work and Power

As P=F.v

Cycling:

A person riding a bicycle possesses some amount of energy. This energy is utilized by the cyclist to do work on the paddles of the bicycle by applying some force and enabling the bicycle to move forward.

Example for 5. PE to KE

An apple hanging on a tree:

It has the potential energy due to its raised position. When the apple falls from the tree. The falling apple has the kinetic energy. Thus the potential energy stored in the apple in its raised position changes into the kinetic energy when the apple is falling. This kinetic energy does work on stone as the apple strikes the stone, and it makes the stone to move into the ground.

Example for 6. Sound and Light

TV:

We see TV takes electrical energy as input and produces. light energy, sound energy.

Example for 7. Heat and Electricity

The electric heaters:

An electric heater is an electrical device that converts an electric current into heat.

Answer:

a) The direction of the current in the copper rod that causes the springs to stretch is left-to-right. This is because the magnetic field is oriented perpendicular to the surface of the table and the force exerted on the rod by the magnetic field is given by F = qVB, where F is the force, q is the charge of the particle, V is the velocity of the particle, and B is the strength of the magnetic field. Since the force is perpendicular to the velocity of the particle, the direction of the current that produces this force must be parallel to the magnetic field. In this case, the magnetic field is oriented perpendicular to the surface of the table, so the current must flow in the direction left-to-right to produce a force that stretches the springs.

b) To find by how much each spring stretches, you can use the formula F = kx, where F is the force exerted by the spring, k is the spring constant, and x is the distance the spring stretches. In this case, the force exerted by the spring is given by F = qVB, and the spring constant is k = 76 N/m. The charge of the particle is q = Ie, where I is the current and e is the charge of an electron. The velocity of the particle is V = L / t, where L is the length of the rod and t is the time it takes the particle to travel the length of the rod. Since the current is 14 A and the length of the rod is 0.77 m, the velocity of the particle is V = 0.77 m / (1 / 14 A) = 10.78 m/s. The strength of the magnetic field is 0.14 T, so the force exerted by the spring is F = (14 A)(1.60 x 10^-19 C)(10.78 m/s)(0.14 T) = 2.40 x 10^-17 N. Therefore, the distance each spring stretches is x = F / k = 2.40 x 10^-17 N / 76 N/m = 3.16 x 10^-19 meters.

The activity of the source in Becquerel is 333.3Bq

The number of nuclei that disintegrate or decay per unit time is known as Activity.

Given that a sample of radioactive material emits 400000 particles over a period of 20 minutes.

Activity A = dN/dt

A = 400000 / 1200

A = 333.3 particles / s

A = 333.3 Bq

Therefore,

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The acceleration of the object is determined as -2.5 m/s².

Acceleration is the rate of change of velocity with time.

Mathematically, acceleration is given as;

a = Δv/Δt

a = (v₂ - v₁)/(t₂ - t₁)

where;

From the graph;

the initial velocity = 40 m/s

the final velocity = 10 m/s

the final time = 12 seconds

the initial time = 0 second

acceleration = (10 - 40) / (12 - 0)

acceleration = -30/12

acceleration = -2.5 m/s²

Thus, the acceleration of the object is determined as -2.5 m/s².

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Answer:

CODIS should be the answer

Answer:

your answer is C

Explanation:

the spring when fully recoiled is at maximum PE and will then convert to KE

Answer:

H = 1/2 g t^2         to get time to fall 1.25 m

t = (2 * 1.25 / 9.8)^1/2 = .505 s

Vx t = 10 m

Vx = 10 m / .505 s = 19.8 m/s

Answer:

The joule is the standard unit of energy in electronics and general scientific applications. One joule is defined as the amount of energy exerted when a force of one newton is applied over a displacement of one meter. One joule is the equivalent of one watt of power radiated or dissipated for one second.

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The graph shows that the block of ice is initially heated until it reaches the melting point, where it undergoes the phase change from solid to liquid.

Based on the information provided, the graph of temperature against thermal energy absorbed indicates the heating process of a block of ice starting at -20°C until it turns to steam. The key feature to consider in this scenario is the plateau region on the graph, which represents the phase change from solid to liquid and from liquid to gas. The latent heat of fusion of ice is the amount of energy required to change a substance from a solid to a liquid state without changing its temperature. In this case, it is given as 340 kJ/kg. During the initial phase, as the ice is heated from -20°C, its temperature gradually rises until it reaches the melting point of ice (0°C). At this point, the energy absorbed is used to break the intermolecular bonds and convert the ice into water. The temperature remains constant at 0°C during this phase change, despite the continuous addition of thermal energy. Once all the ice has melted into water, the temperature starts rising again until it reaches the boiling point of water (100°C). During this phase, the thermal energy absorbed is utilized to convert the liquid water into steam or water vapor. Similar to the melting phase, the temperature remains constant at the boiling point during this phase change. The plateau regions on the graph represent the latent heat of fusion and the latent heat of vaporization, respectively. These phases require a significant amount of thermal energy to break intermolecular bonds and change the substance's state without a change in temperature. Then, the temperature continues rising until it reaches the boiling point, where another phase change occurs from liquid to gas. The latent heat of fusion of ice (340 kJ/kg) represents the energy required to convert the ice into water without changing its temperature.

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Jeff has created a device that can convert solar energy into electricity. This innovative technology harnesses the power of sunlight to generate electrical energy, providing a sustainable and renewable source of power.

Jeff's device utilizes photovoltaic cells to convert solar energy into electricity. Photovoltaic cells, commonly known as solar cells, are made of semiconducting materials, such as silicon, that can absorb photons from sunlight.

When sunlight hits the solar cell, it excites electrons within the material, creating an electric current. The photovoltaic cells are arranged in a panel or module, which can be connected in series or parallel to achieve the desired voltage and current levels.

To optimize the conversion of solar energy, Jeff's device may include additional components, such as a charge controller, which regulates the charging of batteries or the direct usage of electricity.

It may also feature an inverter to convert the direct current (DC) produced by the solar cells into alternating current (AC), suitable for powering appliances and feeding into the electrical grid.

Overall, Jeff's device harnesses the photovoltaic effect to transform solar energy into a usable form of electricity, providing a sustainable and renewable energy source.

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Answer:

Hey mate....

Explanation:

This is ur answer....

The heat is transferred by the process of conduction of heat.

It is given that, Jimmy held the end of a metal bar over a fire while holding on to the opposite end.    

After some time, the end he was holding began to get very hot.

The process of traveling heat from one end of the bar to the other end is called conduction. It is the process of transfer of heat by the interaction of particles and motion of electrons.

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Answer:

\(E=\dfrac{1}{2}mv^2\)

Explanation:

If m is the mass of the object and v is the velocity of the object. The kinetic energy is due to the motion of an object. It is given by the relation as follows :

\(E=\dfrac{1}{2}mv^2\)

The above formula is used to find the kinetic energy of an object.

Explanation:

We can use the Pythagorean theorem to calculate the distance between the two landing sites. Let's call this distance "d".

First, we need to calculate the horizontal and vertical components of the distance traveled by each projectile. Let's call the horizontal component "x" and the vertical component "y".

For the first projectile, the horizontal component is 188 feet (since it landed directly in front of the catapult), and the vertical component is 0 feet (since it didn't go up or down).

For the second projectile, we need to use trigonometry to calculate the horizontal and vertical components. The angle of rotation is 41 degrees, and the distance traveled is 112 feet. So:

x = 112 * cos(41) ≈ 83.2 feet

y = 112 * sin(41) ≈ 71.5 feet

Now we can use the Pythagorean theorem to calculate the distance between the landing sites:

d = sqrt((188 - 83.2)^2 + (0 - 71.5)^2) ≈ 123.5 feet

So the approximate distance between the landing sites is 123.5 feet.

C) Tiny echoes bounce back to the dolphin.

When a dolphin makes a sound, it travels through the water in the form of sound waves. If these sound waves encounter an object, such as a fish or a rock, some of the sound waves will bounce back towards the dolphin in the form of echoes.

What is Sound?

Sound is a type of energy that is produced by the vibration of matter. When an object vibrates, it creates pressure waves that travel through a medium, such as air, water, or solid materials. These waves consist of alternating high and low pressure areas, and are detected by our ears as sound.

This process is known as echolocation, and it is used by dolphins and other animals to navigate, locate prey, and communicate with other members of their species. Dolphins are able to analyze the echoes that bounce back to them to determine the size, shape, and distance of objects in their environment. This ability allows them to hunt and move around in their underwater habitat with great precision, even in conditions of low visibility or darkness.

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Answer:

im pretty sure its d

Explanation:

A kilowatt-hour (kWh) is a measure of energy consumption or production over a specific period, typically used to measure electricity usage.

A kilowatt-hour (kWh) is a measure of energy. Specifically, it represents the amount of energy consumed or produced when a power of one kilowatt (kW) is used for one hour. It is commonly used as a unit to measure electricity consumption in residential, commercial, and industrial settings.

The kilowatt-hour is a product of both power (kW) and time (hours), and it indicates the total energy used or generated over a specific period. For example, if you have a device that consumes 1 kilowatt (1000 watts) and you use it continuously for one hour, you would consume 1 kilowatt-hour of energy.

Power is the rate at which energy is generated or consumed. It is measured in units of watts (W) or kilowatts (kW), where 1 kilowatt is equal to 1000 watts. Power represents how quickly energy is being used or produced.

Time is a crucial factor when considering energy usage or production. The longer a device or system operates at a certain power level, the more energy it will consume or produce. This is where the concept of time comes into play.

A kilowatt-hour (kWh) combines both power and time to measure the amount of energy consumed or produced. It represents the energy equivalent to using a power of one kilowatt for one hour. This can also be expressed as using a power of 1000 watts for one hour.

To calculate the energy consumed or produced in kilowatt-hours, you can multiply the power in kilowatts by the time in hours:

Energy (kWh) = Power (kW) × Time (hours)

For example, if you have a device with a power rating of 1 kilowatt (1000 watts) and you use it continuously for 3 hours, the energy consumed would be 3 kilowatt-hours (1 kW × 3 hours = 3 kWh).

The kilowatt-hour is a commonly used unit for measuring electricity consumption because it provides a convenient and standardized way to quantify the energy used by electrical devices and systems. It allows consumers, utility companies, and energy providers to accurately measure and bill for energy usage.

In summary, a kilowatt-hour (kWh) is a measure of energy consumption or production. It combines power (kilowatts) and time (hours) to quantify the amount of energy used or generated. It is widely used in the context of electricity to measure energy consumption in homes, businesses, and industrial settings.

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Blocks x and y exerts action-reaction forces on each other with 146.1 N and 53.1 N respectively.

The given parameters:

mass of block x = 10 kg

mass of block y = 5 kg

magnitude of the frictional force of block x = 8 N

magnitude of the frictional force of block y = 4 N

the applied force to the right = 40 N

To find:

The block y pulls block x to the left with the following reaction forces;

Force of block y = force due to its own weight + frictional force

where;

g is the acceleration due to gravity = 9.81 m/s²

Thus, block y reacts on block x with a force of 53.1 N

The block x acts on block y towards the right direction with following forces;

Force of block x on y =  force due to its own weight + frictional force + applied force to the right

Thus, block x acts on block y with a force of 146.1 N

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The ratio of the radii and time periods of the deuteron and proton is equal to the ratio of their masses:r_p/r_d = T_p/T_d = (mp/md)The ratio of the radii of the deuteron and proton can be determined by considering their masses and charges.

The deuteron is a nucleus consisting of a proton and a neutron, while the proton is a single positively charged particle.

Since both particles have the same momentum and are moving in the same magnetic field, we can equate the centripetal force acting on each particle:

mv^2/r = qvB

where m is the mass, v is the velocity, r is the radius, q is the charge, and B is the magnetic field strength.

Since the momentum is the same for both particles, we have mv = constant.

For the deuteron, the mass is the sum of the proton and neutron masses, while for the proton, it is the mass of the proton.

mdv_d = mpv_p

By rearranging and squaring both sides of the equation, we get:

(md^2v_d^2)/(mp^2v_p^2) = 1

The ratio of the radii can be obtained by equating the centripetal forces:

mv_d^2/r_d = mv_p^2/r_p

By rearranging and dividing both sides by mv_d^2, we get:

r_p/r_d = (mv_p^2)/(mv_d^2) = (mp/md)

Similarly, the ratio of the time periods can be obtained by equating the angular velocities:

v_d/r_d = v_p/r_p

By rearranging and dividing both sides by v_d, we get:

r_p/r_d = v_p/v_d = (mp/md)

Therefore, the ratio of the radii and time periods of the deuteron and proton is equal to the ratio of their masses:

r_p/r_d = T_p/T_d = (mp/md)

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