if a boat and its riders have a mass of 1200 kg and the boat drifts in at 1.3 m/s how much work does sam do to stop it?

The correct statements from the list are:

Gravity causes molecular clouds to contract.

Gas will heat up as it collapses.

Stars are born from the gas and dust of the interstellar medium.

Explanation:

Molecular clouds are massive structures of gas and dust that are gravitationally bound. Gravity is the force that causes the contraction of the cloud, leading to the formation of stars.

As the molecular cloud contracts due to gravity, the gas and dust particles collide with each other and lose potential energy, which gets converted into heat. This heating process increases the temperature of the cloud and can lead to the formation of a protostar.

Stars are born from the gas and dust of the interstellar medium through the process of gravitational collapse. As the molecular cloud collapses, it forms a protostar that eventually becomes a star.

Protostars are not observable at visible wavelengths because they are embedded in dense clouds of gas and dust. However, they can be detected at infrared wavelengths, where the heat radiation from the protostar and its surrounding disk is more prominent.

The process of star formation is a continuous process that can take millions of years. There is ample evidence to support this idea, including the observation of protostars, young stars, and star clusters at various stages of evolution.

Most protostars can be detected by the jets of gas they emit, known as bipolar outflows. These outflows are generated by the accretion of material onto the protostar, which creates a high-velocity stream of gas that is ejected from the star's poles.

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Alice and Bob travel on a spaceship with a speed of 0.8c along the positive x-axis. At time t' = 10.6 x 10^9 s, a supernova explodes at z' = 12.3 × 10^9 light-seconds, y' = 4.8 × 10^9 light-seconds, and x' = 0. Assume that the clocks on the spaceship were synchronized with the clocks on Earth when our two astronauts left the Earth.

(i) To find the coordinates of the supernova explosion according to an observer in mission control, we need to use the Lorentz transformations for space and time. These are equations that relate the coordinates of an event in one inertial frame of reference to another inertial frame of reference that is moving at a constant velocity relative to the first one. The Lorentz transformations for space and time are:

where γ = 1/√(1 - v^2/c^2) is the Lorentz factor, v is the relative velocity between the frames, and c is the speed of light.

Plugging in the given values, we get:

So, according to an observer in mission control, the supernova explosion occurred at (x, y, z) = (13.4 × 10^9, 4.8 × 10^9, 12.3 × 10^9) light-seconds and at t = 16.8 × 10^9 s.

(ii) To find how long it takes the signal to reach Alice and Bob from the explosion, we need to use the fact that light travels at a constant speed c in all inertial frames of reference. This means that the distance traveled by light is equal to its speed multiplied by its time of travel. In other words:

d = ct

where d is the distance, c is the speed of light, and t is the time.

In this case, we need to find the distance between the supernova explosion and Alice and Bob's spaceship at the time of the explosion in their frame of reference. This can be done by using Pythagoras' theorem:

where d' is the distance, x', y', and z' are the coordinates of the supernova explosion in Alice and Bob's frame of reference.

Plugging in the given values, we get:

Now, we can use d = ct to find t':

So, it takes about 43.7 billion seconds for the signal to reach Alice and Bob from the explosion.

(iii) To find out if mission control will know about the supernova explosion before Alice relays the message to them, we need to compare their times of receiving the signal from different sources. Mission control will receive the signal directly from the supernova explosion after a time t1 given by:

where d is the distance between mission control and the supernova explosion in their frame of reference, and c is

The Lorentz transformions is a coordinate transformation for very fast particle motion approaching the speed of light. This transformation is the basis of the special theory of relativity developed by Albert Einstein. The Lorentz transform states that time and space are relative depending on the frame of reference of the observer.

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Loftus thought that, to a certain extent, eye witness recollection was significant during a court case or prosecution. Eye witness memory, according to Loftus, is crucial since it provides a different perspective and gauges how reliable a witness's testimony is.

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The Planck equation and rules of direct proportions can be found that the amount of energy emitted by sodium the answer is;

              E = 2.2 10⁻¹³ J

Planck's equation establishes a relationship for the energy of photons

          E = h f

          c = λ f

          E = \(\frac{h \ c}{\lambda}\)

Where E is the energy, h the Planck constant (h = 6.63 10⁻³⁴ J s), f the frequency of radiation, c the speed of light and λ the wavelength

The energy emitted by each sodium atom is the energy of the emitted radiation that has a wavelength of 590 nm, two lines close together, indicate that each atom emits a photon, its energy is

             E₀ =  \(\frac{6.63 \ 10^{-34} \ 3 \ 10^8}{ 590 \ 10^{-9}}\)

             E₀ = 3.37 10⁻¹⁹ j

We look for the mass of a mole of sodium in the periodic table

             PM = 29.9897uma ( \(\frac{1.66 \ 10^{-17} kg}{1 una}\)) = 49.78 10⁻²⁷ kg

With a direct rule of proportions we can find the atoms of sodium in the lamp. If in mol of sodium it has a mass 49.78 10⁻²⁷ kg and has avogadro number 6.022 10²³ atoms. How many atoms are there in 45.8 10⁻⁹ kg

               # sodium atoms = \(\frac{49.78\ 10^{-27} \ 6.022 \ 10^{23}}{ 45.8 \ 10^{-9}}\)

               #_atom Sodium = 6.54 10⁵ Sodium atoms.

Let's use a direct ratio rule, If a sodium atom emits an energy Eo, how much energy do you emit? 6.54 105 atoms

              E = Eo  # _atmos / 1 atom

              E = 3.37 10⁻¹⁹ 6.54 10⁵

              E = 2.2 10⁻¹³ J

In conclusion, using the Planck equation and direct proportions rules we can find the amount of energy emitted by sodium, the answer is;

              E = 2.2 10⁻¹³ J

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The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as I = V/R.

The current formula is based on Ohms' law. The flow of electrons in an electric circuit is defined as current. Electrons flow as a result of potential differences. The current is also known as the charge change rate with time. The symbol for current is I, and the SI unit of current is ampere.

The square root of the average square of alternating current or voltage values yields the effective value.

The SI unit of current is ampere, which measures the rate at which electric charge flows across a surface at one coulomb per second. Because charge is measured in coulombs and time is measured in seconds, the unit is coulomb/second (C/s) or amp.

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The acceleration of the eraser is 169.19 m/s².

A body travelling in a circle has centripetal acceleration. Due to the fact that velocity is a vector quantity (i.e., it has both a magnitude and a direction), when a body travels in a circle, its direction is continually changing, which causes a change in velocity, which results in an acceleration.

Given that angular velocity of the eraser: ω = 127 rpm

= 126×2π/60 radian/second

= 13.2 radian/second.

radius of the circle: r = 0.974 meter.

Hence, its centripetal acceleration is = ω²r

= 13.2×13.2×0.974 m/s²

=169.19 m/s².

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We divide the mass of the item by the mass of the sun, which is 1.99 x 1030 kg, to determine how many times more massive the object is than the sun. The answer comes out to be near five times as large as the sun.

(G * m1) / r2 = an is the formula for gravitational acceleration.

Where r is the separation between the red giant and the invisible object, m1 is the mass of the invisible item, G is the gravitational constant (6.67 x 10-11 N (m/kg)), and G is the gravitational constant.

This equation may be rearranged to account for m1:

m1 = (a * r^2) / G

By entering the specified values, we obtain:

m1 is calculated as (0.075 m/s2 * (9.4 x 1010 m) / 6.67 x 10-11 N (m/kg)).

m1 = 9.35 x 10^30 kg

b) We may divide m1 by the mass of the sun to determine the object's mass relative to the sun: (9.35 x 1030 kg) / (1.99 x 1030 kg) = 4.71

The invisible object is therefore 4.71 times as massive as the sun.

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To increase the efficiency of the Carnot engine by 10% of the original efficiency, the temperature of the heat source should be increased by 0.067 times its original value

The efficiency of a Carnot engine is given by:

Efficiency = 1 - (Tc/Th)

Where

In this case, the efficiency of the engine is 40%, which can be expressed as 0.4 in decimal form. Therefore:

0.4 = 1 - (Tc/Th)

Rearranging this equation, we get:

Tc/Th = 0.6

We want to increase the efficiency by 10% of the original efficiency. This means that the new efficiency will be :

0.4 + 0.1(0.4) = 0.44

We can use this new efficiency to find the new ratio of Tc/Th:

0.44 = 1 - (Tc_new/Th_new)

Tc_new/Th_new = 0.56

Now we need to find by how many degrees the temperature of the heat source should change to achieve this new ratio of temperatures. We can set up an equation using the two ratios of temperatures:

(Tc/Th) / (Tc_new/Th_new) = 0.6 / 0.56

Substituting the first ratio we found earlier and simplifying, we get:

0.6 / (Th_new/Th) = 0.6 / 0.56

Th_new/Th = 0.56/0.6

Th_new/Th = 0.933

Multiplying both sides by Th, we get:

Th_new = 0.933 Th

So the temperature of the heat source should be increased by:

ΔT = Th_new - Th = 0.933 Th - Th = 0.067 Th

Where ΔT is the change in temperature and Th is the original temperature of the heat source.

Therefore, to increase the efficiency of the Carnot engine by 10% of the original efficiency, the temperature of the heat source should be increased by 0.067 times its original value.

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Answer:

The Bowling Ball is Denser.

Explanation:

If we consider both balls in terms of mass they are very different.  Size and volume can be the same though.

What makes the mass?  Think of what fills each of the balls.

A Basketball is filled with air, which weighs very little.

Meanwhile, a bowling ball is filled with coverstock, made up of plastic, urethane and resin.  These materials weigh considerably more than air!

Answer:

These two groups of planets are separated by the asteroid belt, a disk of small rocky bodies orbiting the sun between Mars and Jupiter.

Explanation:

Your welcome!

The electric field due to charge 1 at the origin is 2.24 x 10^5 N/C in the direction to the left.

Coulomb's Law states that the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. It is represented as F = (k * q1 * q2) / r2, where F is the force, k is a constant, q1 and q2 are the charges, and r is the distance between the two particles.

Charge 1: 50.0 nC, located 20.0 cm to the left of origin

Charge 2: 35.0 cm to the right of origin

Using Coulomb's Law, the electric field at the origin due to charge 1 is:

E1 = kQ1/r^2

Where:

k = 8.99 x 10^9 Nm^2/C^2

Q1 = 50.0 nC = 5.00 x 10^-7 C

r = 20.0 cm = 0.20 m

Therefore,

E1 = (8.99 x 10^9 Nm^2/C^2)(5.00 x 10^-7 C)/(0.20m)^2

E1 = 2.24 x 10^5 N/C

Hence, the electric field due to charge 1 at the origin is 2.24 x 10^5 N/C in the direction to the left.

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According to the given statement Mrs. Brown's electricity bill for the current month is $5000.00.

To calculate Mrs. Brown's electricity bill for the current month, we need to determine the total number of kilowatt-hours (kWh) she has consumed and apply the corresponding rates.

1. Calculate the electricity usage:

  Current meter reading - Previous meter reading
  20,300 kWh - 17,800 kWh = 2,500 kWh

2. Determine the cost for the first 2000 kWh:

  $1.00/kWh * 2000 kWh = $2000.00

3. Determine the cost for the remaining kWh:

  500 kWh * $3.50/kWh = $1750.00

4. Add the fuel adjustment charge:

  $0.50/kWh * 2500 kWh = $1250.00

5. Calculate the total bill:

  $2000.00 + $1750.00 + $1250.00 = $5000.00


To calculate the electricity bill, we first find the difference between the current and previous meter readings.

In this case, Mrs. Brown used 2,500 kWh.

For the first 2000 kWh, the cost is $1.00 per kWh, resulting in a charge of $2000.00.

For the remaining 500 kWh, the cost is $3.50 per kWh, totaling $1750.00.

Additionally, a fuel adjustment charge of $0.50 per kWh is added to the bill. This amounts to $1250.00.

Finally, we add up all the charges to get the total bill, which is $5000.00.

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Answer: Potential energy increases because the train moves against the magnetic force.

Explanation:

When the magnetic toy train is moved away from a magnet that cannot move, the potential energy in the system of magnets during the movement is affected as there's an increase in the potential energy because the train moves against the magnetic force.

We should note that the potential energy simply means the energy that is stored in the magnetic toy. Since the magnetic toy has been moved away from the magnet, the likelihood of its attraction will reduce thereby there'll be a rise in the potential energy.

Answer:thx

Explanation:

Answer:

A motion map can represent the position, velocity, and acceleration of an object at various clock readings. ... The corresponding motion map has the points spaced farther apart (because the car would go a further distance in each second), and the velocity vectors (arrows) are longer, because the car is moving faster.

Explanation:

To calculate the focal length of the lens used, we need to use the formula 1/f = 1/d_o + 1/d_i, where f is the focal length, d_o is the object distance, and d_i is the image distance.

Looking at the table, we can see that the largest image distance is 113 mm, which corresponds to an object distance of 200 mm. Plugging these values into the formula, we get:

1/f = 1/200 + 1/113

Simplifying this equation, we get:

1/f = 0.0095

Therefore, the focal length of the lens used is:

f = 105.26 mm (rounded to two decimal places)

To calculate the magnification of a mirror, we use the formula m = -i/o, where m is the magnification, i is the image height, and o is the object height.

Plugging in the values given in the question, we get:

m = -15/5

Simplifying this equation, we get the following:

m = -3

Therefore, the magnification of the mirror is -3, which means the image is three times smaller than the object.
To calculate the focal length of the lens, we will use the lens formula:

1/f = 1/u + 1/v

F is the focal length, you are the object distance, and v is the image distance.

The focal length of the lens used is approximately 72.2 mm.

Now, let's calculate the magnification of the mirror. Magnification is the ratio of the image height to the object height:

magnification = image height/object height

In this case, the image height is 15 cm, and the object height is 5 cm:

magnification = 15 cm / 5 cm = 3

The magnification of the mirror is 3.

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Resulting in a buoyant force that is less than the weight of the blimp. This is what allows the blimp to float and hover in the air.

The buoyant force on a one-ton blimp hovering in air is actually less than one ton. This is because the buoyant force is the upward force exerted by a fluid (in this case, air) on an object immersed in it.

The force is equal to the weight of the fluid displaced by the object.Therefore, the buoyant force on the blimp is equal to the weight of the air that the blimp displaces. As the blimp is less dense than air, it displaces a volume of air that weighs less than one ton,

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(1) The angular velocity at position 1 of a uniform rod rotating freely around an axis can be determined.

(2) The velocity of the center of mass at position 2.

(1) To determine the angular velocity at position 1, we need to consider the conservation of angular momentum. Since the rod is rotating freely, there are no external torques acting on it.

The initial angular momentum is zero, and at position 1, the angular momentum is given by L = Iω, where I is the moment of inertia of the rod and ω is the angular velocity. By substituting the values of mass and length of the rod into the formula for moment of inertia, we can solve for ω.

(2) To calculate the velocity of the center of mass at position 2, relative to position 1 and at an angle theta, we can use the concept of angular velocity and linear velocity. The linear velocity of the center of mass is given by v = ωr, where ω is the angular velocity and r is the distance between the center of mass and the axis of rotation. By considering the given angle theta and the length of the rod, we can determine the distance r.

Substituting the value of ω calculated in part (1) into the formula, we can find the velocity of the center of mass at position 2, relative to position 1 and at angle theta.

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Yes I agree. The socio historical concept implies that race is created and maintained through systems of power and inequality.

According to Michael Omi and Howard Winant, in "Racial Formations," race is a socio-historical concept that is constructed through the intersection of cultural, political, and economic forces.

In this book, they argue that race is not an immutable, biologically determined characteristic of individuals or groups but rather a social construct that is created and maintained through systems of power and inequality. The authors illustrate how race is constructed through examples from different historical periods and social contexts.

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The component form of the vector V when given two points in a graph is by getting the horizontal displacement between the initial and terminal points, and the vertical displacement between the initial and terminal points.

This is referred to the pictorial representation of data or variables in an organized manner.

The component form of a vector →v is written as →v=⟨vx,vy⟩

v → = ⟨ v x , v y ⟩ , where vx represents the horizontal displacement between the initial and terminal points, and vy represents the vertical displacement between the initial and terminal points.

On the graph, the points are located which represents the component form of the vector V  thereby making it the most appropriate choice.

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Answer:

hi uv f hmm k in vyvj

Explanation:

hujjkiv ghujihtnkbggvhbbbnnjnj

Answer:

HOPEFULLY i am correct but i say its D. Hopefully I helped!✨

Answer: It can be A or B

Explanation: In physics, motion is the phenomenon in which an object changes its position over time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time.

According to the research, the correct option is A. A psychologist whose goal is to explain a behavior will record descriptions as objectively as possible.

It is a professional who diagnoses and is responsible for collecting facts about the behaviors and experiences of living beings, organizing them in a systematic way and developing theories for their understanding.

This means that psychologists analyze the behavior of living beings from a scientific approach and these studies allow us to explain their behavior.

Therefore, we can conclude that according to the research, the correct option is A. A psychologist whose goal is to explain a behavior will record descriptions as objectively as possible.

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Answer:

The answer is the fourth option

Explanation:

For everyone on edg3, it is D) suggest why a behavior occurs.

Explanation:

can gravity form waves?

does every black hole contain a singularity?

have aliens ever visited earth?

can a start turn into a planet?

how bright is laser beam when viewed from the side?

There is no investigation among the given options that cannot be addressed using gel electrophoresis.

Gel electrophoresis is a common laboratory technique used to separate and analyze DNA, RNA, and proteins based on their size, charge, and other properties. It is widely used in various fields of research, including forensic science, genetics, and biotechnology. Gel electrophoresis can be used to detect DNA contamination, analyze gene expression, determine DNA fingerprinting, and establish paternity testing. Therefore, all the investigations listed, including checking for genomic DNA contamination and purity of samples, examining gene expression, determining DNA fingerprint, and paternity testing can be addressed using gel electrophoresis.

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Heat of fusion latent The latent fusion temperature of a specific solid is the quantity of heat energy needed to transform 1 kilogram of solid into liquids at that solid's melting point.

Energy must be added to overcome the forces holding the particles together in order to transform a solid into a liquid and just a liquid into a gas. The strength of the connections binding the particles together determines how much energy is needed to change their state.

Either Celsius degrees or Kelvin degrees might be used to indicate this. The formula for the quantity Q=mL Q=m L, where m represents the mass of the item and L is the latent fusion temperature for an opening or vaporization, determines the amount of heat necessary to change a material's phase.

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The energy of photon involved in exciton absorption in Germanium (Ge) is approximately 0.76 eV.

The energy of photon involved in exciton absorption in Germanium (Ge) is approximately 0.76 eV. This can be calculated using the formula E_photon = E_gap + E_excitonwhere E_photon = energy of photon,E_gap = energy gap of Ge, andE_exciton = exciton energy.Substituting the given values we have;E_photon = 0.75 eV + 0.01 eVE_photon = 0.76 eVThe effect of exciton absorption on the absorption spectrum of Ge is the appearance of a new peak or band.

The exciton absorption band is usually narrower than the band for the direct interband transition because of the localization of electron and hole pairs. As the temperature is raised, the absorption coefficient for the exciton peak decreases and broadens due to the thermal dissociation of excitons.

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Answer:

Inertia

Explanation:

Inertia is also the reason that it is harder to stop a loaded truck going 55 miles per hour than to stop a car going 55 miles per hour. The truck has more mass resisting the change of its motion and therefore, more inertia.

Answer:

The main application for fusion is in making electricity. Most fusion reactors make less radiation than the natural background radiation we live with in our daily lives. ... Clean - No combustion occurs in nuclear power (fission or fusion), so there is no air pollution.