Answer:
Explanation:
The energy gained by the water can be calculated using the formula for the heat capacity of water, which is: q = mc * Delta T, where q is the energy gained by the water, m is the mass of the water, c is the heat capacity of water, and Delta T is the change in temperature of the water. In this case, m = 1 kg, c = 4.184 J/g * oC, and Delta T = 23.059 - 20 = 3.059 oC. Substituting these values into the formula, we find that the energy gained by the water is approximately 52.3 J.
The heat gained by water will be equal to the heat lost by the material bolt and it can be calculated using calorimetric equation. The heat energy gained by water is equal to 12800 J.
What is calorimetry?Calorimetry is an analytical technique used to determine the heat energy absorbed or released by a reaction system. The calorimetric equation connecting the heat energy q with the mass m, temperature difference ΔT and specific heat capacity c is written as:
q = m c ΔT.
The specific heat capacity of water = 4.18 J/ g °C
mass = 1 kg = 1000 g
temperature difference from 20 to 23. 059 °C.
The heat energy gained by water from the material bolt is then calculated as follows:
q = 4.18 J/ g °C × 1000 g × (23. 059 0 - 20 °C )
= 12800 J.
Therefore, the energy gained by water during the process is 12800 J.
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a 2-kg block rests on a wall that is 3 m tall. what is the gravitational potential energy of the block? the force of gravity on earth (g) is equal to 9.8 m/s2. a. 3 joules b. 6 joules c. 29.4 joules d. 58.8 joules
Gravitational potential energy of block is 58.8 joules.
What is Gravitational energy?It is the potential energy which a massive object has in relation to another object due to gravitational force.It is the potential energy associated with gravitational field which releases when objects fall towards each other.It increases when two objects are brought far apart.
It is calculated by the formula,
PE=mgh
where m=masses of particle
R= distance between 2 objects
G= gravitational constant
In the given problem,formula PE=mgh is used.
mass=2 kg
g=9.8m/s²
h= 3 m
Substituting values in equation
PE=2×9.8×3=58.8 J
It is the energy which is stored in the object due to its height above the ground.It depends on mass and height of body.
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Which one of the following relationship between the wave length (λ) and frequency and the speed (C) of the electromagnetic wave is correct?A. C=v+λ
B. C=λv
C. C=vλ
D. C=1vλ
Inverse proportions exist between frequency and wavelength. The speed of light has a direct relationship with f and, or c=f.
What exactly is an electromagnetic wave?
electromagnetic wave, noun: any of the waves that are transmitted by periodic fluctuations in both the electric and magnetic fields and which include radio waves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays.
How would you define an electromagnetic wave example?
Electromagnetic waves include those produced by radio and television signals as well as microwaves. Just the wavelength separates them from one another. The separation between one wave's peak and the next is known as the wavelength.
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The net force exerted on a car traveling in a circular path at constant speed i A) directed toward the center of the curve. B) zero because the car is not accelerating. C) directed forward, in the direction of travel. D) none of the above
The net force exerted on a car traveling in a circular path at constant speed is A) directed toward the center of the curve. So, correct option is A.
The force which is acted on the car and responsible to move a car towards the center of the curve is called as centripetal force. A centripetal force is a force that causes a body to follow a bended way. Its course is dependably symmetrical to the movement of the body and towards the decent place of the quick focus of shape of the way. Isaac Newton portrayed it as "a force by which bodies are drawn or prompted, or in any capacity tend, towards a point regarding a center". In Newtonian mechanics, gravity gives the centripetal force causing galactic circles.
Hence, correct option is A.
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You are running in a straight line. You ran 3km to the right and then you ran back for 1km.
How much distance you have covered and what is your displacement from the starting point.
(2pts)
3 km
1 km
Displacement (show your work) Don't forget units
Distance (show your work) Don't forget units
The amount of distance that was covered by this person is equal to 4 kilometers.
The displacement from the starting point is equal to 2 kilometers to the right.
What is distance?In Science, distance can be defined as the amount of ground that is covered (travelled) by a physical body or object over a particular period of time and speed, irrespective of its direction, starting point or ending point.
In this scenario, the total distance covered in a straight line by this person can be calculated by adding the distance he ran towards the right direction to the distance he ran towards the left direction as follows:
Distance = xf + x₀
Distance = 3 + 1
Distance = 4 kilometers.
On the other hand (conversely), the displacement of this person would be calculated by subtracting the distance he covered when running back from the distance he covered when running towards the right direction as follows:
Displacement = xf - x₀
Displacement = 3 - 1
Displacement = 2 kilometers to the right.
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what are the currents in the inductor, in resistor r1, and in resistor r2 immediately after the switch is closed?
The current in both the resistors that is r1 and r2 will be zero after the switch is closed.
What is a resistor ?The capacitance and inductance can have undesirable effects in high frequency circuits, such as in radio electronics. The majority of foil resistors have a low parasitic reactance, but wirewound resistors are among the worst. The resistor's electrical noise level needs to be as low as feasible for precise applications like audio amplifiers.
Since it cannot change instantly, the current through the inductor is zero when the switch is first closed.
This indicates that the inductor behaves like an open circuit and that all of the voltage is applied across it.
The magnetic field gets stronger as the current ramps up from zero.
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a person stands on a scale in an elevator. his apparent weight will be the greatest when the elevator a person stands on a scale in an elevator. his apparent weight will be the greatest when the elevator is moving upward at constant velocity. is moving downward at constant velocity. is standing still. is accelerating downward. is accelerating upward.
His apparent weight will be the greatest when the elevator accelerating upward.
What is accelaration?acceleration is the rate of to the change of the velocity of an object with respect by time.
When a person stand in an elevator moving upwards, he feels heavier because the elevator's floor presses harder on his feet, and the scale will show a higher reading than when the elevator is at rest.
According to Newton's second law
R = mg + ma
where;
R is the reading of the scale = apparent weight of the person
mg is the normal weight of the person
ma is the upward force acting on the person
Therefore, his apparent weight will be the greatest when the elevator is accelerating upward
(c) is accelerating upward
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A car accelerates from rest to 10m/s when it sees a dog. This takes 2 seconds. What is the acceleration of the cat?.
The acceleration of the cat to reach its maximum velocity of 10 m/s in 2 seconds is 5m/s².
according to the first equation of motion,
[tex]v-u=a t[/tex]
Given to us
Time is taken by the cat to reach the final velocity = 2 seconds
Final velocity of the cat = 10 m/s
The initial velocity of the cat = 0 m/s
Substitute the values in the equation,
[tex]\begin{aligned}& v-u=a t \\& 10-0=a(2) \\& a=5 \mathrm{~m} / \mathrm{s}^2\end{aligned}[/tex]
What is the velocity?
A vector dimension of the rate and direction of motion. Put easy, velocity is the speed at which something gaits in one direction is called velocity.
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A horizontal force of 25 N is required to push a wagon across a sidewalk at a constant speed. (5 points)
What is the net (unbalanced) force acting on the wagon?
What is the value of the force of friction acting on the wagon?
If the force on the wagon increased to 30 N, use Newton's law to explain what the effect would be.
The net force acting on the wagon at a constant speed is 0.
The value of the force of friction acting on the wagon is 55 N.
What is the net force acting on the wagon?The net force acting on the wagon is calculated by applying Newton's second law of motion as shown below.
F - Ff = ma
where;
F is the applied forceFf is the force of frictionm is the mass of the wagona is the acceleration of the wagonAt a constant speed, the acceleration of the wagon = 0
F - Ff = 0
F - Ff = F(net)
Thus, the net force is zero, when the speed of the wagon is constant.
The force friction acting on the wagon if the force on the wagon increased to 30 N is calculated as;
F - Ff = 0
( 30 N + 25 N ) - Ff = 0
Ff = 55 N
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Given that the mass of Venus is 4.83 x 1024 kg and the mass of Earth Is 5.98 x 1024 kg, and that the
orbital radius for Venus is 1.08 x 10¹ m and for Earth is 1.49 × 10¹ m:
a. Determine the MAXIMUM force of gravitational attraction between Venus and Earth.
b. If you weigh 445 N on Earth, what will you weigh on Venus? The radius of Venus is 6.31 x 10 m.
c. If you were placed on a line between Earth and Venus, at what point measured from Earth
would you experience equal gravitational force from each planet?
a) The MAXIMUM force of gravitational attraction between Venus and Earth is 8.68*10³⁶ N.
b) I will weigh 405N on Venus
c) The point at which the gravitational forces of Earth and Venus would be equal is called the Lagrange point.
What is gravitational force?This refers to a force of attraction (attractive force) that attracts all physical forms having mass to the center of the earth.
The maximum force of gravitational attraction between Venus and Earth can be calculated using Newton's law of universal gravitation. Using the law of the force of attraction between two objects with masses m₁ and m₂ and separated by a distance r is given by:
Formula for calculating gravitational attraction/force:
a). F = G * (m₁ * m₂) / r²
Where,
G = gravitational constant,( 6.674 x 10⁻¹¹ N*(m/kg)²).
r₁ = 1.08 x 10¹ m
r₂ = 1.49 × 10¹ m
m₁ = 4.83 x 10²⁴ kg
m₂ = 5.98 x 10²⁴ kg
Substituting in the values for the mass of Venus and Earth, and the distance between them, we get:
F = (6.674 x 10⁻¹¹ N*(m/kg)²) * (4.83 x 10²⁴kg) * (5.98 x 10²⁴ kg)
( 1.49 × 10¹m)²
Simplifying, we get:
F = 8.68*10³⁶ N
This is the maximum force of gravitational attraction between Venus and Earth.
b)The weight of an object on a planet is determined by that planet's mass and surface gravity. The surface gravity of Venus is about 8.87 m/s², which is about 91% of the surface gravity of Earth.
Thus if you weigh 445 N on Earth, you would weight on Venus will be:
weight on Earth * the surface gravity of Venus
= 445 N * 91
100
weight on Venus = 404.95N
weight on Venus ≈ 405N
C) The point at which the gravitational forces of Earth and Venus would be equal is called the Lagrange point. There are five such points in the Earth-Venus system, designated L1 through L5. The point you are describing is called the L1 point, and it is located about 1.5 million kilometers from Earth in the direction of Venus. At this point, the gravitational forces of the two planets are in balance, so an object placed there would remain stationary with respect to both Earth and Venus. However, it would still be affected by the gravitational forces of the Sun and other celestial bodies, so it would not be a true equilibrium point.
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the daily tidal range is of the least magnitude during ________.
Due to the Earth's rotation, the seas' neap tides alter every six hours or so. The Moon and the Sun's gravitational pull on the ocean's water produces the tides themselves.
What usually happens when waves approach shallow water?Waves from deep water become breaking waves when they enter the shallow water. The water particles drag along the bottom and flatten their orbit when the wave energy contacts the ocean floor (Fig. 4.18 B). When the water depth is less than half the wavelength (D 1/2 L), transitional waves are produced.
When waves enter shallow water, they frequently try to align themselves parallel to the shore.A wave's energy release when it approaches a beach or coastline creates a current that travels parallel to the shoreline. A "longshore current" is the name given to this kind of current.
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a projectile is thrown horizontally at 11.5 m/s. the projectile hits the ground 0.570 s later. what is the angle of impact the projectile makes with the horizontal ground?
The angle of impact of the projectile with the horizontal ground is 26°.
What is angle of impact in a projectile?A projectile is formed when an object is thrown in space and the only force acting on it is gravity. Angle of Impact also known as acute angle is made by the velocity vector and the normal to the target surface.
A very well known study of angle of impact is that of blood splatter analysis.
Calculation:Initial velocity of the projectile is
As the projectile is thrown horizontally the vertical component of the initial velocity is vxy=0
Horizontal component= vix= 11.5m/s
As gravitational acceleration is acting vertically downward let the vertical component of the velocity after time t=0.570s is,
vfy=0+gt
vfy=0+(0.981*0.570)
vfy= 5.59m/s
Horizontal component of the velocity does not change as there is no horizontal acceleration.
so the horizontal component of the final velocity is
vfx=vix=11.5m/s
if Ф be the angle with the horizontal then,
tan Ф=vfy/vfx
tanФ= 5.59/11.5
tanФ=0.486
Ф=tan∧-10.486
Ф=26°
So, the angle of impact of the projectile with the horizontal is 26°
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a 1 046-kg satellite orbits the earth at a constant altitude of 101-km. (a) how much energy must be added to the system to move the satellite into a circular orbit with altitude 190 km? 437.36 correct: your answer is correct. mj (b) what is the change in the system's kinetic energy? 385.4 incorrect: your answer is incorrect. is the satellite moving faster or slower when it's orbit is at a higher altitude? mj (c) what is the change in the system's potential energy? 437.36 incorrect: your answer is incorrect.
Drag the labels onto the epidermal layers. Reset Help Stratum basale Stratum lucidum Dermis Dermal papilla Stratum corneum Basement membrane Stratum granulosum Epidermal ridge Stratum spinosum
Stratum spinosum, stratum lucidum, epidermal ridge, stratum basale, basement membrane, dermis, dermal papilla, stratum granulosum, stratum carenum.
Although the real keratinocytes originate in the stratum basale, keratinization starts in the stratum spinosum. Since they are actively producing the fibrilar proteins known as cytokeratin, which accumulate within the cells clumping together to form tonofibrils, they feature big pale-staining nuclei. Desmosomes, which enable solid connections to form between neighbouring keratinocytes, are created from tonofibrils. Langerhans cells may also be seen in the stratum spinosum. Desmosomes are used to connect these. When desmosomes are stained with H&E, the microfilaments between them shorten, giving them their spiny (Latin, spinosum) appearance.
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when air expands adiabatically (without gaining or losing heat), its pressure and volume are related by the equation , where is a constant. suppose that at a certain instant the volume is and the pressure is kpa and is decreasing at a rate of kpa/min. at what rate is the volume increasing at this instant?
The rate at which the volume is increasing is dV/dt equals 21.2 cm3/min.
What is adiabatic expansion?Adiabatic expansion is defined as expansion in which there is no heat exchange between the system and its environment and the system uses its own energy to perform work.
An ideal gas is enclosed in an insulated container and allowed to expand in a vacuum for adiabatic free expansion. The work done by or on the system is 0 because the gas cannot expand because there is no external pressure for it to do so.
This should, I assume, state that PV 1.4 = C.
By applying the chain rule and the product rule to the derivative with regard to time, we arrive at:
[tex]PV^1^.^4[/tex] = C
[tex]\frac{d}{dt} (PV^1^.^4)[/tex] = d/dt( C)
On further solving the derivative we get,
(-7)(4201.4) + (99)(1.4)(4200.4)dV/dt = 0
-32934 + 1552.6dV/dt = 0
dV/dt = 32934/1552.6
dV/dt equals 21.2 cm3/min.
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the explosive tnt has a heat of combustion of 3406 kj/mol. is this higher or lower than sugar?
TNT's heat of combustion is 3406 kJ/mol lower than that of sugar, which is 5639 kJ/mol. TNT burns at a lower temperature, which means that it will explode more quickly. For sugar, the heat-up period will be somewhat longer.
What is Heat?Heat is the result of the movement of kinetic energy within a material or an item, or from an energy source to a material or an object. Radiation, conduction, and convection are the three mechanisms through which such energy can be transferred.
What is TNT?The term "TNT equivalent," which is frequently used to refer to the energy produced in an explosion, is a typical approach to transmit energy. A metric ton (1,000 kilograms) of TNT is equal to 4.184 gigajoules, or roughly the amount of energy released when a ton of TNT detonates.
Hence, TNT's heat of combustion is 3406 kJ/mol lower than that of sugar, which is 5639 kJ/mol.
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16. Ice has lower density than water because ice: A) molecules vibrate at lower rates than water molecules: B) molecules are more compact in the solid state. sinks_ is made of open-structured, hexagonal crystals: closed sealed can of air placed ona hot stove. The contained air undergoes an Consider increase in: A) volume_ B) mass_ density . pressure and temperature. 18_ Diffraction is a result of: A) refraction: B) reflection. dispersion: interference_ thin film on water are demonstration of: Colors seen when gasoline forms interference_ B) refraction _ C) dispersion. D) reflection_ 19_ 20. Flectromagnetic waves can travel: through a vacuum. through medium through either & medium o a vacuum: D) through a current:
When water freezes, the water molecules create a crystalline structure that is held together by hydrogen bonding.
define density ?
The density of a material indicates the density of that material in a specified region. The density of a substance is defined as its mass per unit volume. Density is a measurement of how closely stuff is packed together. It is a distinct physical attribute of a certain thing. Archimedes, a Greek scientist, developed the density principle. If you know the formula and understand the units, calculating density is simple. The sign indicates density, which may also be represented by the letter D.
Water molecules develop a crystalline structure when it freezes, which is sustained by hydrogen bonding. The density of solid water, or ice, is lower than that of liquid water. Because the orientation of hydrogen bonding leads molecules to push further apart, ice has a lower density than water.
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Help please I need help fassttttt
The distance -time graph of object D shows a linear relationship. Thus it moves with a constant speed. Whereas, object C shows a non-linear relation of distance and time thus, it moves with a changing speed.
What is velocity?Velocity is a physical quantity that measures the distance covered per unit time. Velocity is a vector quantity and is having both magnitude and direction.
Velocity is the ratio of distance to the time. Thus, if the change in distance is linear with the change in time, there will be no change in velocity and the object is said to be moving with constant velocity.
If the distance and time are non-linear thus, thus, change in distance is not coinciding with change in time, then the velocity changes each time.
Therefore, object C has a changing speed and object D has a constant speed.
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_____is 1/1000 oF an ampere, the current used for facials and scalp treatments.
Ampere. A ____ is one thousandth of an amp. the current utilized for face and scalp treatments is measured in milliamperes.
What are voltage and ampere?The electrical potential difference is measured in volts. The force that propels electrons across an electrical circuit to create an electric charge that is measured in amperes is another way to define volt. Amperes are units used to quantify electric current, or even the number of electrons moving across a circuit.
What is volt contribution?He developed the astatic needle, an indispensable facet of the contemporary astatis galvanometer, that was the first to show that a magnetic field is produced when parallel wires are electrically charged. He is usually acknowledged as the first to develop electromagnetic.
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a thin wire 7.0m long has a charge of 1 nC. Find the electric field strength 2.0 mm from the edge of the wire along the axis of the wire.
Answer:
1400
Explanation:
because when the 70m long x20m lone will give u 1400 then u time it with 1 that will give u 1400
a negative point charge is at the center of a hollow insulating spherical shell, which has an inner radius and an outer radius . there is a total charge of spread uniformly throughout the volume of the insulating shell, not just on the surface. what is the electric field at postion r away from the center? use as the electric constant.
The electric field at position r away from the center is E = Q / 4ε₀[tex]\pi[/tex][tex]r^{2}[/tex]
An electric field can be thought of as the electrical property associated with every point in space where charge in any form is present.
An electric field is also described as the electric force per unit charge.The electric field formula is given as; E = F/QWhere,
E is the electric field.
F is force.
Q is the charge.
The electric field is easily found using Gauss's law, which states that the total electric flux from a closed surface is equal to the enclosed charge divided by the permittivity. Mathematically, [tex]\int\limits {E} \, ds[/tex] = (1/ ε₀) * qThe magnitude of the electric field can be determined using the Coulomb force F on the test charge q.
Mathematically, E = Q / 4ε₀[tex]\pi[/tex][tex]r^{2}[/tex]If the field is created by a positive charge, the electric field will point radially outward, and if the field is created by a negative charge, the electric field will point radially inward.The electric field at position 'r' away from the center is E = Q / 4ε₀[tex]\pi[/tex][tex]r^{2}[/tex].
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a student holds a laser that emits light of wavelength 633.0 nm. the laser beam passes though a pair of slits separated by 0.200 mm, in a glass plate attached to the front of the laser. the beam then falls perpendicularly on a screen, creating an interference pattern on it. the student begins to walk directly toward the screen at 3.00 m/s. the central maximum on the screen is stationary. find the speed of the 50th-order maxima on the screen.
Speed of the 50th-order maxima on the screen = 0.480 m/s
Given in the question,
Wavelength = 633.0 nm
Dimension of slits = 0.200 mm
Speed of students walking toward the screen = 3.00 m/s
The angle of 50th order fringe =
⇒ d sinθ = mλ
⇒ θ = [tex]sin^{-1}[/tex]( 50λ / d)
The distance x from the slit to the screen and the distance y of the 50th-order fringe from the central maximum is related by tan θ,
tan θ = [tex]\frac{y}{x}[/tex]
As the student comes closer to the screen at speed v, the distances between x and y decrease but their ratio stays the same.
tan θ =[tex]\frac{y}{x}[/tex]
y = x tan θ
[tex]\frac{dy}{dt}[/tex] = [tex]\frac{dx}{dt}[/tex]tan θ
Since [tex]\frac{dx}{dt}[/tex] represents a change in speed so we could assume,
[tex]\frac{dx}{dt}[/tex] = v
[tex]\frac{dy}{dt}[/tex] = -v tan θ
As we can see in the question that the distance is decreasing so the change in distance will also decrease hence = [tex]\frac{dy}{dt}[/tex] will be negative.
[tex]v_{50th-order}[/tex] = |[tex]\frac{dy}{dt}[/tex]| = vtanθ
= vtan[ [tex]sin^{-1}[/tex] (mλ / d) ]
By using this formula we will find the speed of the 50th-order fringe,
[tex]v_{50th-order}[/tex] = (3.00m/s)tan { [tex]sin^{-1}[/tex] [ [tex]\frac{50(633.0 * 10^{-9}m) }{0.200 * 10^{-3} }[/tex] ] }
[tex]v_{50th-order}[/tex] = (3.00 m/s) tan (9.1053)
[tex]v_{50th-order}[/tex] = 3.00 x 0.160
[tex]v_{50th-order}[/tex] = 0.480 m/s
Therefore, speed of the 50th-order maxima on the screen = 0.480 m/s
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A 0.14-kg baseball is dropped from rest from a height of 2.0 m above the ground. What is the magnitude of its momentum just before it hits the ground if we neglect air resistance?
A) 0.28 kg ∙ m/s
B) 1.4 kg ∙ m/s
C) 0.88 kg ∙ m/s
\D) 0.62 kg ∙ m/s
E) 0.44 kg ∙ m/s
If a 0.14-kg baseball is dropped from rest from a height of 2.0 m above the ground, then the magnitude of its momentum just before it hits the ground would be 0.8764 kg - m / s.
What is momentum?
It can be defined as the product of the mass and the speed of the particle, it represents the combined effect of mass and the speed of any particle, and the momentum of any particle is expressed in Kg m/s unit.
As given in the problem if a 0.14-kg baseball is dropped from rest from a height of 2.0 m above the ground.
The velocity just before hitting the ground = √ ( 2 × 9.8 × 2)
= 6.26 m / s
The magnitude of its momentum just before it hits the ground = 0.14 × 6.26
= 0.8764 kg - m / s
Thus, the magnitude of its momentum just before it hits the ground would be 0.8764 kg - m/s
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Why does the Sun emit neutrinos? Solar flares create neutrinos with magnetic fields_ Convection releases neutrinos, which random walk through the radiation zone. The Sun does not emit neutrinos Neutrinos are a by-product of fusion in the Sun's core in step of the p-p process
The Sun emit neutrinos because of the fusion in the Sun's core creates neutrinos.
Most of the neutrinos that are currently flowing through you came from the sun. Every second, a hundred billion solar neutrinos travel through our fingernail.
Nuclear fusion occurs in the sun, where it results in the creation of neutrinos. Protons, the nucleus of the most basic element, hydrogen, combine during fusion to create helium, a heavier element.
As a result, neutrinos and energy are released, which will eventually manifest on Earth as light and heat.
These solar neutrinos represent an overall energy emission from the Sun of about 1%. Every second, the Sun emits 1038 neutrinos, each carrying 4 1024 W of electricity.
The sun's core can also be directly understood through the use of solar neutrinos. Unexpectedly, neutrinos generated in the sun's core reach to
Earth before light from the sun (formed in the same reaction), something we would not expect. This isn't because neutrinos can move more quickly than light since they can't.
Neutrinos encounter with matter so infrequently that they are able to immediately depart the sun's dense core, whereas photons (the light particles) bounce around before breaking free.
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Correctly label the different filaments of a sarcomere. Mline Thick filament Thin filament Myofiber Sarcomere Z disc A band Contains myosin
The labeling of the different filaments of a sarcomere shown below -
What about sarcomere?Sarcomere is the smallest functional unit of striated muscle tissue. It is repeating unit between two z-disc. In striated muscle sarcomere, the M-line is the attachment site for the thick filaments. The M-line is in the center of the A band and thus, it is in the center of sarcomere.
Actin and myosin, the two primary protein filaments that make up each sarcomere and are the functional elements in charge of causing muscle contraction. The sliding filament theory is the most widely used model for describing muscle contraction.
The labeling are shown below:
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The complete question is as follows:
Which of the following represents the correct relationship between frequency and angular frequency?
a) ω=2πf b) ω=πf c) f=2πω d) f=πω
The suitable formula for the relationship between frequency and angular frequency is f=2r. A recurring event's frequency is measured by how many times it occurs in a unit of time.
What pitch does the universe have?
You may connect with the cosmos through this music's 432 Hz frequency and experience the power of the creative source. We use the 432 Hz frequency to help the unconscious become aware of how we shape our world.
What frequency causes harm to people?
The only known negative health consequences of RF field exposures in the frequency range from 3 kHz to 300 GHz relate to the occurrence of tissue heating and nerve stimulation (NS) from brief (acute) exposures, despite the advent of several further research papers on RF fields and health.
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The speed of light is c=299,792,458m/s a. Write this value in scientific notation. b. What is the value of c to four significant figures?
Answer:
Explanation:
sci notation: 2.99792458 x 10^8
4 sig figs: 2.998 x 10^8
You are standing in front of a concave mirror. Your image appears enlarged and upside down. Where are you standing relative to the mirror?
between the focus & the centre of curvature of the mirror
a 1.00 kg crate is placed at the top of a 0.0 incline i.00 m in length and is released. the coefficient of friction , between the crate and the incline is 0.15. what is the work done by the frictional force on the body as it slides down the incline g
The work done by the frictional force will be 0 Nm. Since the crate is released at the top of the incline and there is no initial velocity, it will not move and the work done by the frictional force will be zero.
The work done by the frictional force on the body as it slides down the incline can be calculated using the formula:
Work = Force * Distance
In this case, the force of friction is equal to the coefficient of friction, 0.15, multiplied by the weight of the crate, 1.00 kg * 9.8 m/s^2 = 9.8 N. The distance the crate travels is the length of the incline, 0.0 m.
Therefore, the work done by the frictional force on the body as it slides down the incline is:
Work = 0.15 * 9.8 N * 0.0 m = 0.0 Nm.
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a uniform ladder rests against a smooth vertical wall. there is no friction between the ladder and the wall. the coefficient of static friction between the ladder and the ground is 0.506. what is the minimum angle such that the ladder does not slip?
The minimum angle that the ladder make with the floor before it slips with the force is 45 Degree.
Given data:
The coefficient of static friction force between ladder and floor is, \mu =0.5.
Apply the Newton' law in vertical direction to obtain the value of Normal Force (P) as,
N = mg
And force along the horizontal direction is,
F= μ*N
F = μ*mg
Now, taking the torque along the either end of ladder as,
-mgcosθ * L/2 = (μmg)*sinθ*L
cosθ*1/2 = μsinθ
tanθ = 1/(2*0.5)
tanθ = 1/1 = 1
tanθ = tan 45
θ = 45
Thus, we can conclude that the minimum angle that the ladder make with the floor before it slips with the force is 45 Degree.
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a plane flies horizontally at an altitude of 5 km and passes directly over a tracking telescope on the ground. when the angle of elevation is ?y3, this angle is decreasing at a rate of ?y6 radymin. how fast is the plane traveling at that time?
When a plane flies horizontally at an altitude of 5 km and passes directly over tracking telescope on the ground, then the plane is traveling at the speed of 8.69 km/min.
What is angle of elevation?The angle of elevation is widely used for height and distance in trigonometry. It is defined as the angle between horizontal plane and oblique line from the observer's eye to any object above his eye.
tan(θ) = opposite / adjacent
tan(θ) = y/x
x tan(θ) = y
x = y/tan(θ)
x = 5/tan( π/3)
dx/dt * tan(θ) + x * sec²(θ) * dθ/dt = d y /dt
As altitude remains the same, d y/dt = 0
dx/dt * tan(π/3) + 3/tan(π/3) * sec²(π/6) * -π/6 = 0
dx/dt = [5/tan(π/3) * sec²(π/3) * π/6} / tan(π/3)]
= 5/0.018* 3413.6 * 0.52/ 0.018
= 8.69 km/min
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Note: The question given on the portal is incomplete. Here is the complete question.
Question: A plane flies horizontally at an altitude of 3 km and passes directly over a tracking telescope on the ground. when the angle of elevation is π/6, this angle is decreasing at a rate of π/4 rad/min. how fast is the plane traveling at that time?
