buoyancy: a steel ball sinks in water but floats in a pool of mercury, which is much denser than water. where is the buoyant force on the ball greater?

The power train is a vehicle's consists of components that generate and transmit power to the wheels.

The collection of all the parts that propel your car forward is called the powertrain. The engine of your car generates power, which the powertrain then transfers to the wheels on the ground. The engine, transmission, driveshaft, axles, and differential are the main parts of a powertrain. A high-performance sports sedan is frequently described as having smooth steering, acceleration, and braking, as well as great body control and improved driving safety. These methods are crucial, but they are not the "end-all" of a great sports car. Its incredible performance figures, such as its ability to accelerate from zero to one hundred kilometers per hour in just seconds, come exclusively from your powertrain.

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Answer: If two objects have the same mass but have different sizes, the object with the greatest density will be the smaller of the two objects. Using an example of two cubes.

Explanation:

Answer:

the smaller of the two objects

Explanation:

If two objects have the same mass but have different sizes, the object with the greatest density will be the smaller of the two objects.

john needs to measure the brightness of a light bulb using the metric system, in candela he expresses his measurement.

The decimal standard for measuring is a globally perceived decimalized arrangement of estimation. It is in far and wide use, and where it is taken on, it is the just or most normal arrangement of loads and measures. Decimal standard can be involved by a few groups all around the world as a solitary method for estimating the amounts. This will make them to effectively think about their works. The Decimal standard for measuring was first embraced in France, and essentially every country on the planet currently utilizes it. Be that as it may, for reasons unknown, America hasn't gotten the update yet. The decimal standard gives units of estimation to remove, volume, mass, time, and temperature. It constructs these units utilizing a fundamental unit and a bunch of prefixes. The accompanying rundown shows five significant essential units in the decimal standard.

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Answer:

A. candela

Explanation:

I did a quiz with this question.

Positively charged rod acting as an attractor will cause spheres A and B's combined negative charges to gravitate toward sphere A. A and B's combined positive charge will concentrate in sphere B.

Since the spheres are oriented perpendicular to the rod, an equal force from the positively charged rod will pull the spheres' negative charges, C and D, towards the direction of the rod. However, they won't focus on just one area. There have been no charging movements.

Any geometry where angles may be measured has a perpendicular. When two lines cross, they make a 90° angle. Lines have perpendiculars running through them at every point along the length of them in the majority of geometries (including spherical, Euclidean, hyperbolic, and others). The answer to your query is indeed true.

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The truck passes the cyclist with a frequency of 8.59×10⁻³Hz.

In physics, frequency is the number of waves that pass a fixed point in a unit of time as well as the number of cycles or vibrations that a body in periodic motion experiences in a unit of time.

According to the question:

Using Doppler effects:

f' = (v+v₀/v-v₁)f

v₀ is the speed of the observer.

v₁ is the speed of the source.

v is the speed of sound in the medium.

Given:

v, speed of truck = 19.7m/s

f, frequency = 1/90Hz

v₀, speed of cyclist = 4.47m/s

v₁, speed of wave from a stationary source.

Putting in the equation:

f' = 8.59×10⁻³ Hz.

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Answer:

3,510 po yung sagot pa brainliest po

Explanation:

By adding the distances for cycling, running, and swimming, the total race distance can be determined. The distance covered by him is 13.5 km.

Converting all the distances to the same unit before combining them because the triathlete swims 500 meters, runs 3000 meters, and cycles 10.0 kilometers.

Divide 500 meters by 1000 to get kilometers: 500 meters divided by 1000 equals 0.5 kilometers.

Divide 3000 meters by 1000 to get 3 kilometers: 3000 meters divided by 1000.

The triathlete completes a 0.5-kilometer swim, a 3-kilometer run, and a 10.0-kilometer bike ride.

Now that the distances have been added, the total is 13.5 kilometers: 0.5 kilometers for swimming, 3 kilometers for running, and 10.0 kilometers for cycling.

Consequently, the race's overall length is 13.5 kilometers.

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The speed of proton is 0.063c given that the rest energy of an electron is 0.511MeV and the rest energy of a proton is 938MeV, with both particles having kinetic energies of 2.00MeV.

From the data given,

Rest energy of an electron = 0.511MeV

Rest energy of a proton = 938MeV

Kinetic energies (K) = 2.00MeV

Using the equation.

γ=K/E_0 +1      (1)

Where, γ represents the ratio of total energy to the rest energy of the particle

γ=2.00MeV/938MeV+1  

γ=0.002+1

γ=1.002

γ can also be derived as shown below;

γ=1/(√1-v^2/c^2)

Making v which is the velocity the subject of formula we get;

γ^2=1/(1-v^2/c^2)    by squaring both sides

Simplifying it we get;

1/γ^2 =1-v^2/c^2  

v^2/c^2 =1-1/γ^2  

v/c=√1-1/γ^2  

v=√1-1/γ^2 ×c     (2)

Putting the values into equation 2 we have;

v=√1-1/〖1.002〗^2 ×c

v=√1-0.996×c

v=√0.004×c

v=0.063×c

v=0.063c

The speed of proton is 0.063c.

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An object of mass “15kg” is in free fall in a vacuum where there is no resistance determine the acceleration of the object -9.8 m/s^2

An object of mass “15kg” is in free fall in a vacuum where there is no resistance

During a free fall motion an object acquires acceleration

a = g  ( gravity)

a = 9.8 m/s^2

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The resultant vector will be 29.5° E of N.

A = 5 m/s

B = 7 m/s at 25° NE

C = 3 m/s at 45° NW

To find the resultant vector for these given vectors,

first we need to resolve the vector B and C into X and Y direction respectively.

On resolution, vector gets distributed into its X-axis and Y-axis components.

Vector B has BCos25° as its X component and BSin25° as its Y component

Similarly, Vector C has CCos45° ac its X-axis component and CSin45° as its Y-axis component.

Now, the algebraic sum of the resolved parts of a series of forces in a particular direction is equal to the resolved part of their resultant in the same direction.

Σ along X-axis

= 5 + BCos25° - CCos45°

= 5 + 7(0.92) - 3(0.76)

= 5 + 6.44 - 2.28

Fx = 9.16 m/s

Σ along Y-axis

= BSin25° + CSin45°

= 7(0.38) + 3(0.64)

= 2.66 + 1.92

Fy = 4.58 m/s

The direction of the resultant vector is given by calculating Tan[tex]\alpha[/tex]

Here Tan[tex]\alpha[/tex] = [tex]\frac{P}{B\\}[/tex]

Tan[tex]\alpha[/tex] = [tex]\frac{4.58}{9.16}[/tex]

Tan[tex]\alpha[/tex] = 0.5

[tex]\alpha[/tex] = Tan⁻¹(0.5)

[tex]\alpha \\[/tex] = 29.5° with the X-axis

Magnitude of the resultant vector can be calculated by

= [tex]\sqrt{Fx^{2} +Fy^{2} +FxFyCos\alpha }[/tex]

= [tex]\sqrt{9.16^{2} +4.58^{2}+ 9.16*4.58*Cos29.5 }[/tex]

= 11.93 m/s

Therefore the resultant vector will be having 11.93 m/s as magnitude directing 29.5° from East to North.

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The production of an electric current by a changing magnetic field is known as electromagnetic induction.

The phenomenon when the current is produced due to changing magnetic field is given by Faraday.

And this phenomenon is called the electro-magnetic induction or magnetic induction since the electricity is generated due to the fluctuations or variance in the magnetic field.

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Answer:

electromagnetic induction

Explanation:

here,

the inner diameter , d = 10 um = 10 * 10^-6 m

radius , r = d/2 = 5 * 10^-6 m

resistivity , p = 0.5 ohm.m

length , l = 6 mm = 0.006 m

the resistance , R = p * l /area

R = p * l /( pi * r^2)

R = 0.5 * 0.006 /(pi * ( 5 * 10^-6)^2) ohm

R = 3.82 * 10^7 ohm (Answer)

the resistance of a wire is 3.82 * 10^7 ohm

Neurons, or nerve cells that transmit nerve impulses, consist of a cell body, an axon, and a few dendrites. Signals travel through synapses, where the axon of one neuron meets the dendrites of another neuron, using chemicals called neurotransmitters.

An electrical signal that travels along a nerve fiber in response to a stimulus and conveys the recording of sensations from receptors or instructions to effectors: Propagation of an action potential along the length of a neuron.

Differential charges across the plasma membrane of neurons generate nerve impulses. How does this charge difference come about? The response contains ions, which are charged atoms or molecules.

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It is a maximum in the y z plane

Theoretically, magnetic field lines must traverse the coil's contained space in order for there to be magnetic flux through the coil. In contrast to the x y and x z planes, where the coils are located, the y z plane is where the magnetic field lines pass through.

The entire magnetic field that traverses a particular area is measured by magnetic flux. It is a helpful tool for explaining how the magnetic force affects things inhabiting a certain area. The precise area selected will determine how magnetic flux is measured.

When the field is perpendicular to the coil's region, the flux is at its highest level. When the x axis is located in the plane of the loop and there is no magnetic field component perpendicular to the loop, the flux is zero.

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Answer:

Inheritance

Explanation:

Passing of genetic material to offspring over the next generations

Chemical molecules called neurotransmitters are released at the end of the synaptic junction, which allows the neuron to communicate with other neurons.

In the human body, neurotransmitters are chemical messengers that convey information between neurons.

The main function of these transmitters is to pass on electrical signals from nerve cells to other cells of the body including nerves, muscles, and glands.

Neurotransmitters are the major constituents of the nervous system and play a significant role in communication among different organs.

Moreover, they are also crucial for human development and growth.

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It is possible to avoid the spread of accidental wildfires in parks when we stop rangers from initiating a burn that is controlled. Option D

The term wild fire refers to fires that burn uncontrollably. There are some factors that could lead to the beginning of wild fires. One of the several ways that we could have the emergence of a wild fire is if a fire is set up and then is left unattended.

The effects of this wild fire could be so devastating that large buildings as well as large habitats where organisms live could become permanently damaged from the raging of the wild fire and could now amount to a tremendous damage as well as the loss of biodiversity in the ecosystem.

Thus, It is possible to avoid the spread of accidental wildfires in parks when we stop rangers from initiating a burn that is controlled.

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Answer:

ethylene

Explanation:

ethylene is a compound consist of two double bonded carbon atom and four hydrogen atoms at room temperature is a gas

Answer:

Ethylene

Explanation:

Because Ethylene is a simple molecule composed of two double-bonded carbon atoms and four hydrogen atoms. It's a gas at room temperature. Ethylene molecules can be chemically bonded, end to end, to form a polymer named polyethylene.

The distance traveled by the student in a car is 9 m.

The reaction time of the student is the time of motion of the meter stick and it is calculated as follows;

t = √(2h/g)

where;

t = √(2 x 0.64/9.8)

t = 0.36 seconds

x = vt

where;

x = 25 m/s  x  0.36 seconds

x = 9 m

Thus, the distance traveled by the student in a car is 9 m.

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In the near future, I hope that physicists will work on the following theories:

A theory for superconductors that operate at high temperatures, like YBCO.

A stochastic Monte Carlo approach, such as the wave function of interacting electrons in alkali metals, that can handle multiple identical fermions.

A hypothesis for iron superconductors, such as FeSe surface layers on a substrate.

A hypothesis explaining dark matter.

I believe environmental issues will have a greater impact on physics. Cleaner and greener lab equipment will be used in science. The particle-accelerator laboratories that once took pride in bragging about how much electricity they used to run collision tests will either have to be more discreet or, even better, prioritize energy-saving solutions. Air travel will become less acceptable as the effects of climate change worsen, making it more difficult for physicists on the go to defend their conference flights.

The field of medical physics will keep growing, with new imaging technologies and better radiotherapy procedures. NASA's James Webb Space Telescope should finally take off in astronomy.

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Answer:

answer explanation

Explanation:

explanation answer

The radius of the alpha particle's trajectory is [tex]r_{\alpha } =\frac{3}{4} (R(proton))[/tex].

The journey through space and time taken by a mass-moving object is referred to as its trajectory or flight path. Since a trajectory is determined by Hamiltonian mechanics using canonical coordinates, a full trajectory in classical mechanics is defined by position and momentum simultaneously.

A satellite or a missile could represent the mass. For example, a planet, asteroid, or comet moves around a major body in a path called an orbit.

A projectile's trajectory, such as that of a ball or rock thrown, is a well-known example of a trajectory. In a greatly simplified model, an object only moves when it experiences a constant gravitational force field.

Calculations:

Since, the collision is elastic:

Therefore, momentum will be conserved.

Which means:  [tex]m_{p}.v_{p} + m_{\alpha}.v_{\alpha } = m_{\alpha } . v_{0} +m_{p} .v_{po}[/tex]

[tex]m_{p}.v_{p} + m_{\alpha}.v_{\alpha } = m_{\alpha } . v_{0} ......(i)[/tex]

Similarly, for elastic collision:

Additionally conserved is kinetic energy:[tex]KE_{f}[/tex][tex]=KE_{I}[/tex]

                                       =1/2 [tex]m_{p}[/tex][tex]v_{p} ^{2}[/tex]+[tex]1/2 m_{\alpha }.v_{\alpha } ^{2}[/tex]=[tex]1/2m_{\alpha } v_{0} ^{2}[/tex]

For head on collision: ([tex]v_{0} -v_{p0}[/tex])=[tex](v_{\alpha } - v_{p} )[/tex]

                                     [tex]v_{\alpha } +v^{0} =v_{p}[/tex].......(ii)

and,[tex]m_{\alpha } =4m_{p}[/tex].....(iii)

therefore equation(i) becomes.

                     [tex]5v_{\alpha } =3v_{0} \\v_{\alpha } =\frac{3}{5} v_{0} \\[/tex].......(iv)

From equation (ii) and (iv)   [tex]v_{p} = \frac{3}{5} v_{0} +v_{0} =\frac{8}{5} v_{0}[/tex].......(v)

From equation (iv) and (v)    [tex]\frac{v_{p} }{v_{\alpha } } =\frac{8}{3}[/tex]

Since, [tex]r=\frac{mv}{qB}[/tex]

R(proton)=[tex]\frac{m_{p} v_{p} }{eB}[/tex]

[tex]r_{\alpha } =\frac{3}{4} (\frac{m_{p}v_{p} }{eB } )[/tex]

[tex]r_{\alpha } =\frac{3}{4} (R(proton))[/tex]

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1) Heat is added to a solid by exposing the solid to heat sources

2) The antifreeze is used to keep water liquid in winter

3) Frost is formed by the withdrawal of heat

We know that heat is that which leads to the existence of a temperature difference between two bodies. This the reason for a change in temperature of a body is the addition or the withdrawal of heat.

We could add heat to a body when we heat the body up by exposing the body to a source of heat. For instance, we add heat to food when we place the food on top of our gas cookers and light the gas cooker.

The antifreeze is used to decrease  the temperature at which water freezes. We know that addition of a solute would make pure water to freeze at a temperature that is less than zero degrees. This helps to keep the water in the liquid state at temperatures less than zero during winter.

Frost is formed when heat is withdrawn from a object thus that its temperatures decreases until it reaches the ice point.

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Answer:

1. When a solid is heated, it gains enough kinetic energy to break the force of attraction that holds it in a fixed shape, and it turns into a liquid.

2. The purpose of antifreeze is to transfer heat from a car's engine to a radiator without causing it to boil or freeze. The mixture raises the boiling point of water while decreasing its freezing point. Other chemicals in antifreeze protect the coolant passages in the metal radiator and engine from rust and corrosion.

3. When the temperature is freezing, water vapor condenses on the solid surface and condenses to produce dew, which eventually freezes.

As the speed of the object increases, the fluid resistance increases.

The fluid resistance is what could otherwise be referred to as the drag force. This is the force that inhibits the object from moving through the fluid. Thus it drags the object and prevents its motion.

This fluid resistance is caused by the layers of the fluid as the object moves through the fluid. As the speed of the object increases, the fluid resistance increases.

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[tex]Given: Current $30 \mathrm{~A}$ along $x$-axis to left $\left(I_1\right)$current $50 \mathrm{~A}$ along $\gamma$-axis $(0=z, y=0.280 \mathrm{~m})$ bo righta) Take a point $P$ at distance $x$ below $x$-axis$B=$ Magnelic field at $P$$B_D=\frac{\mu_0 I_1}{2 \pi x} \hat{k}+\frac{\mu_0 I_2}{2 \pi(0.28+x)}(-\hat{k})=0\left(\mu_0=4 \pi_{\times 10^{-7}} \mathrm{n} / \mathrm{m}\right)$[/tex][tex]$\frac{\mu_0 I_1}{2 \pi \alpha}=\frac{\mu_0 I_2}{2 \pi(0 \cdot 28+x)} \hat{k} \Rightarrow \frac{\mu_0 30}{2 \pi \alpha} \hat{k}=\frac{\mu_0^x 50}{2 \pi(0.28+x)} \hat{k}$$\Rightarrow x=0.42 \mathrm{~m}$[/tex]

The magnetic impact on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field. A force perpendicular to the charge's own velocity and the magnetic field acts on it while the charge is travelling through a magnetic field.  The magnetic field of a permanent magnet pulls on ferromagnetic substances like iron and attracts or repels other magnets. A magnetic field that varies with location will also exert a force on a variety of non-magnetic materials by changing the velocity of those particles' outer electrons. Electric currents, such those utilized in electromagnets, and electric fields that change in time produce magnetic fields that surround magnetized things.

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The global positioning system (GPS) satellite  that moves in a circular orbit with period of 11h 58 min has an orbital radius of: 26.55465166*10^6 m

To solve this problem the orbital radius formula and the procedure we will use is:

r =[tex]\sqrt[3][/tex][tex]\sqrt[3]{}[/tex][(G* m *T²)/(4 * π²)]

Where:

Information about the problem:

By converting the time period of (h) and (min) from (s) we have:

T = (11h *3600 s/ 1 h) + (58 min * 60 s/1 min)

T = 39600 s +3480 s

T = 43080 s

Applying the orbital radius formula we get:

r =[tex]\sqrt[3][/tex][tex]\sqrt[3]{}[/tex][(G* m *T²)/(4 * π²)]

r =[tex]\sqrt[3][/tex][tex]\sqrt[3]{}[/tex][(6.67 × 10⁻¹¹ m³/kgs² * 5.972 × 10²⁴ kg *(43080 s)²)/(4 * (3.1416)²)]

r =[tex]\sqrt[3][/tex][tex]\sqrt[3]{}[/tex][1.8725*10^22 m³]

r= 26.55465166*10^6 m

It is the maximum of the radial distribution curve of the outermost orbital.

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The electric field on the axis of the ring at the center of the ring at 30.0cm is 6.74×〖10〗^6 N/C

Where a positive charge (q) is given, always note that the charges are pointing away from the electric field. The expression used to calculate the electric field away from the center of the ring is given by the equation below,

E=(K_e×b)/(r^3×Q)

Given that;

E = Electric field

Ke = electric field constant

a = radius of the charge q from the center of the circle

Q = electric charge = 75.0μC

The radius of the charge is a = 10cm= 0.1m

Distance from the electric field is 30cm = 0.3m

Ke is a constant given as  8.99×〖10〗^(9  ) Nm^2/c^2

E=(8.99×〖10〗^(9  ) Nm^2/c^2×0.3)/(〖0.1〗^3×75×〖10〗^(-6) )

E=6.39×〖10〗^6N/C

Therefore, the electric field away from the center of the ring is 6.39×〖10〗^6N/C away from the center of the ring

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If the atomic orbitals are oppositely charged and are out-of-phase combinations then they interact destructively.

In Chemistry, molecular orbital theory(MOT) indicates the design of electron movement in a molecule.

The theory also states that electrons have wave-like nature which occurs as a result of the combination of the atomic wavefunction.

Theory suggests that there are two types of orbitals in a molecule: bonding orbitals (BO) and anti-bonding orbitals(ABO).

More are the chances of molecule stability if the electrons are present in bonding orbitals rather than anti-bonding orbitals.

Molecular orbitals are produced by the overlapping of atomic orbitals. When only the crusts of waves overlap in molecule orbitals they form constructive interference while overlapping of troughs causes destructive interference.

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Answer: The maximum possible speed v is √2(  hν - Ф  ) / m

Explanation: You could be referring to the provided explanation, despite the fact that the question isn't comprehensive. When a photon collides with the surface of any metal, it transmits all of its energy to the electron in the atom. The collision causes the electron to travel with a certain amount of kinetic energy. This is referred to as the photoelectric effect. The maximum kinetic energy is calculated using Einstein's equation for the photoelectric effect:

K.E. = hν - Ф

½ mv² = hν - Ф

Hence the maximum possible speed is:

v = √2(  hν - Ф  ) / m

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The Spring constant (K) = 9 N/m.

We have a force of 8 lb is required to keep a spring compressed to 13 ft shorter than its equilibrium length.

We have to determine the Spring constant.

The restoring force is directed towards the Equilibrium position.

According to the question, we have -

Force = 8 lb = 8 x 4.45 = 35.6 Newton.

Displacement = 13 ft = 3.96 meter.

Now -

The Restoring force = Applied force

Therefore -

|F| = Kx

35.6 = 3.96K

K = 8.99 = 9 N/m.

The Spring constant K = 9 N/m.

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If blinded by an approaching motor vehicle at night, it is best to slow down and avoid looking directly into the lights of the approaching vehicle which is denoted as option C.

This refers to something which is used to transport people and goods from one place to another and examples include car, lorry etc. The lights are used at night for proper vision of the road so as to reduce the risk of accidents on the road.

In a situation whereby an individual is blinded  by an approaching motor vehicle at night, it is best to slow down and avoid looking directly into the lights of the approaching vehicle so as to prevent temporary vision impairment.

This helps to prevent accidents on the road and for the safety of the driver thereby making it the correct choice.

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