The ranking of magnitude of buoyant forces of the four boxes from greatest to smallest is FD>FA=FB>FC. The ranking of masses of the blocks from greatest to smallest is mD>mA=mB>mC and the ranking of densities of the blocks from greatest to smallest is pA=pB=pD>pC.
(a) The buoyant force is the upward force exerted on an object wholly or partly immersed in a fluid. This upward force is also called Upthrust. Due to the buoyant force, a body submerged partially or fully in a fluid appears to lose its weight, i.e. appears to be lighter. It depends on acceleration due to gravity, volume of fluid and fluid density.
Thus, the order of force on the block from greatest to smallest is FD>FA=FB>FC.
(b) Mass (symbolized m) is a dimensionless quantity representing the amount of matter in a particle or object. The standard unit of mass in the International System (SI) is the kilogram (kg). If an object's average density is less than that of the surrounding fluid, it will float. The reason is that the fluid, having a higher density, contains more mass and hence more weight in the same volume. The buoyant force, which equals the weight of the fluid displaced, is thus greater than the weight of the object.
Thus, the order of mass on the block from greatest to smallest is mD>mA=mB>mC.
(c) Buoyant force is directly proportional to the density of the liquid displaced. So, greater the density of the liquid, greater is the buoyant force due to the liquid. So, the order of density on the block from greatest to smallest is pA=pB=pD>pC.
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An airplane starts from rest and accelerates on a runway at 5 m/s^2 for 7 seconds. How far down the runway is the plane after 7 seconds?
The runaway is far down for 122.5 m from the plane after 7 seconds.
What do you mean by equation of motion?Equations of motion relate the displacement of an object to its velocity, acceleration and time.
For motion with a constant acceleration (a), from an initial velocity (u), to a final velocity (v), the equations are given as follows:
Velocity, v = u + at
Displacement with positive acceleration, [tex]s=ut+\frac{1}{2}at^{2}[/tex]
Displacement knowing initial and final velocities, [tex]s=\frac{1}{2}(u+v)t[/tex]
Velocity squared, [tex]v^{2} =u^{2} +2as[/tex]
where,
t is the time over which the acceleration occurs
s is the displacement of the object from its initial position.
Calculation:Acceleration (a) = 5 m/s^2
Time (t) = 7 seconds
Initial velocity is zero i.e., u = 0
Therefore, the distance travelled (s) can be given by the following Equation of motion:
[tex]s=ut+\frac{1}{2}at^{2}[/tex]
[tex]s= 0\times7+\frac{1}{2}\times5\times7^{2}[/tex]
[tex]s=122.5 m[/tex]
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How do I solve this equation
The kinetic energy of a electron that passes undeviated through perpendicular electric and magnetic field is 1.2 × 10⁻²⁶ kg.m².s⁻² .
How is the kinetic energy calculated ?Given here is ,
q = 1.60218 × 10⁻¹⁹ C
m = 9.10939 × 10⁻³¹ kg
E = 0.18 kV/m = 180 V/m
B = 1.1 mT
where,
q is charge on electron
m is mass of electron
E is electric field
B is magnetic field
We know the kinetic energy of electron is calculated by
K.E = 1/2 (mv² )
∴ v = F / qB
∵ F = Eq
∴ F = 180 × 1.60218 × 10⁻¹⁹
∴ F = 288.3 × 10⁻¹⁹
∴ F = 2.8 × 10⁻¹⁷ N
Now,
v = F / qB
∴ v = (2.8 × 10⁻¹⁷ ) / (1.60218 × 10⁻¹⁹ ×1.1 )
∴ v = (2.8 × 10⁻¹⁷ ) / (1.7 × 10⁻¹⁹ )
∴ v = 1.64 × 10²
∴ v = 164 m.s
Now to calculate K.E,
K.E = 1/2 (mv² )
∴ K.E = 1/2 (9.10939 × 10⁻³¹ × 164²)
∴ K.E = 1/2 (9.10939 × 10⁻³¹ × 26896)
∴ K.E = 1/2 (245006.15 × 10⁻³¹ )
∴ K.E = 122503 × 10⁻³¹
∴ K.E = 1.2 × 10⁻²⁶
Hence , the kinetic energy of electron is 1.2 × 10⁻²⁶ kg.m².s⁻².
What is kinetic energy ?We must use force to accelerate an object. We must work in order to exert force. When an object is worked on, energy is transferred and the object moves at a new constant pace. The transferred energy is known as kinetic energy, and it is proportional to the mass and speed attained.In Physics, kinetic energy is defined as follows: The kinetic energy of an object is the amount of work it can do due to its mobility.Can learn more about kinetic energy from https://brainly.com/question/114210
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how does a black hole form from a massive star? how does a black hole form from a massive star? if enough mass is accreted by a white dwarf star that it exceeds the 1.4 solar mass limit, it will undergo a supernova explosion and leave behind a black-hole remnant. any star more massive than 1.4 solar masses will undergo a supernova explosion and leave behind a black hole remnant.
Answer:
A stellar black hole is formed by the gravitational collapse of a massive star (greater than 30-70 solar masses) at the end of its lifetime. The process is observed as a supernova explosion or a gamma-ray burst.
Explanation:
what is the momentum of a car with a mass of 2,000 kg moving at a constant velocity of 20 m/s?(1 point)
the momentum of a car with a mass of 2,000 kg moving at a constant velocity is 40,000 kg. m/s
The kinetic energy is 400kJ
The kinetic energy is
K.E=(1/2)mv2
The mass is m = 2000kg
The velocity is v = 20ms−1
So, K.E = (1/2)x2000x202 = 400000J = 400kJ
In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. Kinetic energy is the energy an object has because of its motion. If we want to accelerate an object, then we must apply a force. Applying a force requires us to do work. After work has been done, energy has been transferred to the object, and the object will be moving with a new constant speed.
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sunspots appear dark because they are cooler than the surrounding solar surface. group of answer choices true false
Because they are substantially cooler than the rest of the Sun's surface, sunspots appear dark (in visible light). However, despite their gloomy appearance, they are nonetheless quite hot.
Around 6,300 Fahrenheit (3,500 Celsius) is the temperature of a sunspot, while 10,000 Fahrenheit is the temperature of the sun's surface (5,500 Celsius). A sunspot would glow brightly if it were the only one in outer space.
The size of the average sunspot is comparable to that of our entire planet! Although sunspots can range in size from hundreds to tens of thousands of kilometers across, they do exist (many times larger than Earth).
To gauge the sun's activity, scientists calculate the total area (size) of all the sunspots that may be seen on it each day. Sunspots disappear after a while. They appear and vanish on the Sun's surface.
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How do you compare the energies of the different parts of the electromagnetic spectrum?
The different types of radiation in electromagnetic spectrum are compared by the amount of energy found in the photons.
Radio waves have photons with low energies, microwave photons have a little more energy than radio-waves. Infrared photons still have more energy, then comes visible, ultraviolet, x-rays and the most energetic of all, gamma rays.
The energy associated with electromagnetic radiation is proportional to frequency and inversely proportional to wavelength. So, electromagnetic waves with shorter wavelengths have more energy.
On one end of the electromagnetic spectrum are radio waves, which have wavelengths billions of times longer than those of visible light. On the other end of the spectrum are gamma rays with wavelengths billions of times smaller than those of visible light.
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a particle of mass m is moving with a constant speed v along a straight line that passes through point p. what can you say about the angular momentum of the particle relative to point p?
A particle with mass m is moving at a constant speed of v in a straight line via point p. With regard to the magnitude of point p, the particle has no angular momentum. The magnitude of the particle changes in sign when it passes point P.
Angular momentum, sometimes referred to as moment of momentum or rotational momentum, is the rotational counterpart of linear momentum in physics. as a result of the quantity's conservation.
In a closed system, the overall angular momentum remains constant. It is a huge physical amount. The conservation of angular momentum applies to both its direction and its amplitude. The conservation of angular momentum is responsible for the functionality of gyroscopes, rifled bullets, frisbees, bicycles, and motorbikes.
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One type of cuckoo clock keeps time by having a mass bouncing on a spring, usually something cute like a cherub in a chair. What force constant is needed to produce a period of 0.700 s for a 0.0225 kg mass?
The force constant of the spring is 1.81 N/m.
When all other forces acting on the mass in a damped mass-spring system are grouped together into one term denoted by F(t). The spring constant is the type of force that is required to stretch the string.
Using the relation;
T = 2π√m/k
T = period = 0.700 s
m = mass in kilograms = 0.0225-kg
k = spring constant = ?
Making k the subject of the formula;
k = 4π²m/T²
k = 4 × (3.14)² × 0.0225/(0.700 )²
k = 1.81 N/m
Therefore, the force constant of a spring needed to produce a period of 0.700 s for a 0.0225 kg mass is 1.81 N/m.
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A black hole…
A. is a gateway to another dimension.
B. has the gravitational pull to devour an entire galaxy.
C. cannot exist, according to the laws of physics.
D. has an escape velocity of the speed of light or greater.
Answer:
D
Explanation:
A black hole is not a gateway to another dimension.
It is impossible for a blackhole to devour an entire galaxy.
Black holes do exist.
Therefore, the answer is D.
Answer:
We are going to leave the quantum theory of gravitation and return to Einstein's general relativity to describe those very exotic objects that so appeal to the imagination of young people, black holes. They are objects whose gravitational attraction is so great that not even light can escape from their surface. We already know what the escape velocity is, so what we mean is that, when we calculate the escape velocity in a black hole (see the end of Topic 1) we get a value of 300,000 km/s or more.
Explanation:
What is the frequency of 2 waves per second?
The frequency of 2 waves per second is 0.5Hertz.Frequency is measured in Hertz.
Frequency implies the amount of cycles in a particular unit of time. The legitimization for why the sky is blue or anything contains assortment can be successfully figured out by it. Besides, it can similarly get a handle on why the voice of specific individuals is significant while for others it isn't significant. Similarly, Frequency plays a significant impact on the notes of a piano or different instruments.
This number of occasions is irrefutably a crucial property of a wave. The waves include people reliably. Besides, light is an electromagnetic wave and the fan is a sound wave. A wave is clearly a vibration and conveys energy with it. For the most part basic, the amount of waves passing by each second insinuates the repeat of the wave. Additionally, its assessment occurs in Hertz (Hz).
We know a formula
Frequency=1/Time period
=>v=1/T
Putting the values, we get
=>v=1/2
=>v=0.5/sec or
v=0.5Hz.
Hence, frequency of wave is 0.5Hz.
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The Doppler Effect has applications in robotics.
A) False
B) True
a simple harmonic oscillator consists of a block of mass attached to a spring of spring constant what are the amplitudes
Apmlitutde for the system will be [tex]A = A_{o}e^{\frac{-bt}{2m} }[/tex].
What is amplitude in a spring mass system?Simply said, a spring-mass system is a spring system with a block hanging or fastened to the free end of the spring. The period of any item moving in a simple harmonic motion may often be determined using the spring-mass system. There are several other uses for the spring-mass system. For instance, the spring-mass system may be used to replicate foot skin deformation and the action of human tendons using computer images.
In a closed environment, a spring with mass m and spring constant k exhibits a straightforward harmonic motion.
T = 2π √m/k
It is obvious from the aforementioned equation that neither gravitational acceleration nor amplitude affect the oscillation's period. Furthermore, the period of oscillation cannot be changed by a constant force. While this is happening, the length of time directly relates to the mass of the body that is attached to the spring. If you connect a hefty object to it, it will oscillate more slowly.
Apmlitutde for the system will be [tex]A = A_{o}e^{\frac{-bt}{2m} }[/tex].
Where, A = Amplitude of oscillation
b = Decay constant
m = mass
t = time
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why do astronomers think the black hole in our galactic center has the event horizon with the largest angular size?
The black hole in our galactic center has an event horizon's size increases linearly with the mass of the black hole; a black hole with a solar mass of 10 would have an event horizon of 30 km.
The radius of a black hole increases with its mass. For the Sun or any object with a solar mass of one, the event horizon is 3 km (a little under two miles).
The matter will be broken down into its tiniest subatomic pieces once it enters the black hole's event horizon and finally be compressed into the singularity. The event horizon of the black hole grows proportionally as more matter is drawn into the singularity.
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the density of aluminum is 2700 kg/m3. if transverse waves travel at in an aluminum wire of diameter what is the tension on the wire?
A particular density results in a 52.02 N strain on the aluminum wire.
part of the aluminum wire
A = πd²/4 A = π x (4.6 x 10⁻³)
²/4\sA = 1.66 x 10⁻⁵ m²
The wire's mass per square meter is 2700 kg/m3 times 1.66 x 105 m2 which is 0.045 kg/m.
The aluminum wire is therefore under 52.02 N of stress at the specified density.
What does "in diameter" mean?A straight line that passes through the center of a rounded item or form and ends at a point on the opposing edge: Radius is divided by two to get the diameter. A six-foot radius surrounds the pond.
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Suppose you have a 8.4 cm diameter fire hose with a 2.2 cm diameter nozzle.a. Calculate the pressure drop due to the Bernoulli effect as water enters the nozzle from the hose at the rate of 40.0 L/s. Take 1.00 × 103 kg/m3 for the density of the water.b. To what maximum height, in meters, above the nozzle can this water rise?
(A) The pressure drop according to Bernoulli's equation is 1207.811 KPa.
(B) The maximum height nozzle can rise is 0.120 m.
In fluid dynamics, Bernoulli's principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure or a decrease in the fluid's potential energy.
The total energy in the flow is generally tracked by Bernoulli's equation. Bernoulli's equation maintains track of how energy changes between potential energy, pressure energy, and velocity energy throughout the flow since energy cannot be generated or destroyed.
Given,
Diameter of fire hose = 8.4 cm
Diameter of nozzle = 2.2 cm
Since nozzle and hose are at same level so
h1 = h2
Applying Bernoulli's equation, we get
P1 + (1/2)ρv₁² + ρgh₁ = P₂ +(1/2)ρv₂² + ρgh₂
Solving further, we get
P₁ - P₂ = (1/2)ρ(v₂² - v₁²)
We also know that discharge is
Q = AV
so
V = Q/A
Substituting Q/A in this equation
P₁ - P₂ = (1/2)ρ(v₂² - v₁²)
P₁ - P₂ = (1/2)ρ(49.729² - 7.573²)
P₁ - P₂ = 1207.811 KPa
The pressure drop is 1207.811 KPa.
B
The maximum height attained
P₁ - P₂ = h*d*g
1207.811 KPa = h * 1000*10
h = 0.120 m
The maximum height nozzle can rise is 0.120 m.
Therefore, using Bernoulli's equation we got to know the pressure drop and the maximum height.
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one end of a horizontal rope is attached to a prong of an electrically driven tuning fork that vibrates at a frequency 127 hz . the other end passes over a pulley and supports a mass of 1.50 kg. the linear mass density of the rope is 0.0550 kg/m . part a what is the speed of a transverse wave on the rope?
The speed of a transverse wave on the rope is 16.359 m/s
The tension in the rope will be equal to the weight of the hanging mass:
T = mg = (1.5 kg)(9.81 m/s)
T = 14.72 N
Now, the speed of the transverse wave on the rope is given by the following formula:
V = [tex]\sqrt{T/μ}[/tex]
where,
v = speed = ?
μ = linear mass density = 0.0550kg/m
Therefore,
V = [tex]\sqrt{14.72/0.0550}[/tex]
V = 16.359 m/s
A wave that oscillates perpendicular to the direction of the wave's advance is said to be transverse. Comparatively, a longitudinal wave moves in the direction of its oscillations. Transverse waves include those in the water.
A straightforward illustration may be seen in the waves that can be made on a horizontal length of string by anchoring one end and moving the other end up and down. The waves made on a drum's membrane are another illustration. The directions in which the waves travel are parallel to the membrane plane, yet the membrane's individual points move up and down in directions that are perpendicular to that plane. Another example of a transverse wave with oscillations that are not periodic is light.
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a uniform sphere made of modeling clay has radius r and moment of inertia i1 for rotation about a diameter. it is flattened to a disk with the same radius r. part a in terms of i1, what is the moment of inertia of the disk for rotation about an axis that is at the center of the disk and perpendicular to its flat surface?
The moment of inertia will increase after transformation from a uniform sphere to a disk. Moment of inertia is represented by I.
We know that for a uniform sphere, moment of inertia is given by the expression =(2/5)mr² =0.4mr² where m is the mass of the sphere and r is the radius of the sphere.
Now, when a sphere is converted to disk, then its volume remains same as it is given that radius of disk and radius of sphere is same after conversion.
So, only factor is moment of inertia, we know that moment of inertia of disk is given by the formula=(1/2)mr² = (0.5)mr² where m is the mass of the disk and r is the radius of the disk.
We can see that on conversion of sphere into disk, moment of inertia increases from 0.4 to 0.5.
Hence, moment of inertia increases.
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How do you calculate period and frequency?
Time period is calculated by the formula 2π/angular frequency whereas frequency is calculated by the formula speed/wavelength
Frequency is characterized as the quantity of complete waves produces in unit time. The unit of frequency is Hertz.
It is the proportion of speed and frequency of a wave. f=v/λ , where v and λ is the speed and wavelength of light.
Time period is the important opportunity to finish a solitary wave.The unit of time period is second.
Time period is characterized by the formula, T=2π/ω=1/f, where ω is the angular frequency of a wave and f is its frequency.
On the off chance that we know the speed and frequency of the wave previously, figuring out the frequency by the above formulae f=v/λ ,after estimation of the frequency we can gauge the time period utilizing T=2π/ω.
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.
Most of the radiation released from the failed nuclear reactor was from fission products.a. Trueb. False
The fission products iodine-131, cesium-134, and cesium-137 made up the majority of the radiation produced by the failed nuclear reactor. Iodine-131 is rapidly consumed through the air and has a tendency to localize in the thyroid gland, despite having a half-life of only eight days, according to UNSCEAR.
Does radiation come from nuclear fission?
Atoms split apart during nuclear fission, releasing energy in the process. Nuclear fission is used in all nuclear power reactors, and uranium atoms are used in the majority of them. In the process of nuclear fission, a neutron splits a uranium atom after colliding with it, releasing a significant quantity of energy in the form of heat and radiation.
If a fission reactor malfunctioned, what would happen?
Because of the potential for radioactive elements to escape from all containment and enter the environment, causing radioactive pollution and fallout and perhaps poisoning nearby people and animals, a meltdown is thought to be extremely severe.
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What is the mass and weight of an object on the surface of the moon, if on the earth its mass is 12kg.
The mass and weight of object on moon is 0.0138kg and 0.0229kg .
Since force is a vector quantity, we must consider the direction in which it acts. There are two main types of frictional force: static force (Fst) and sliding force (Fsl). Normal forces (FN) produce these forces acting perpendicular to the direction of motion, although they act in the opposite direction to the object's motion.
It is equivalent to the weight of the object plus the extra weight. For example, pushing down on a block of wood on a table increases the normal force and thus the frictional force.
me=12Kg
ge=10
gm=10/6= 1.66
M=?
me ge =M gm
M=me ge/gm
M=120/1.66
M=0.0138kg
W=mg =0.0138 x 10kg
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rank the following series from low frequency to high frequency. a. infrared light, radio waves, x-rays b. black light, nuclear energy, cell phone c. visible light, television waves, gamma rays
The following series from low frequency to high frequency are:
Radio waves-cellphone-television waves-infrared light-x-rays- black light-nuclear energy-visible light-gamma rays
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. After moving through a sequence of situations or locations and then returning to its initial position, a body in periodic motion is said to have experienced one cycle or one vibration. See also basic harmonic motion and angular velocity.
The frequency is 2 per second if the period, or time interval, needed to complete one cycle or vibration is 1/2 second; it is 100 per hour if the duration is 1/100 of an hour. The reciprocal of the period, or time interval, is typically the frequency.
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You place a 500 g block of an unknown subtance in an insulated container filled 2 kg of water. the block has an initial temperature of 50 degrees c. the water is initially at 20 degrees c. if the equilibrium temperature of the block and water is 25 degrees c, what is the specific heat of the block? the specific heat of water is 4186 j/kg k.
The specific heat of the block is 3349J/kg C if a 500 g block of an unknown substance in an insulated container.
We know very well that if a system is in equilibrium state, it means that Heat loss = Heat gained
Also, Quantity of heat gained or released is given by = mcΔ∅
where m is defined as mass of substance
c is defined as the specific heat capacity
and Δ∅ is defined as the change in temperature
Therefore, applying the above formula by assuming heat lost by water will be heat gained by the block.
=>m₁×c₁×(∅₂-∅₁) = m₂×c₂×(∅₁-∅₃)
where, we have m₂ as mass of water = 2kg
c₂ as specific heat capacity of water = 4186J/kg C
∅₃ as initial temperature of water = 20°C
Also, we have m₁ is defined as the mass of block = 500g = 0.5kg
c₁ is defined as the specific heat capacity of unknown substance
∅₂ is defined as block initial temperature = 50°C
∅₁ is defined as equilibrium temperature of block and water after mix= 25°C
Therefore, on putting the above quantities on above formula, we get
=>0.5×c₁×(50-25) = 2 x 4186×(25-20)
=>0.5×c₁×25=41860
=> c₁×12.5=41860
=>c₁=41860/12.5
=>c₁ = 3348.8J/kg C≅ 3349J/kg C
Hence, specific heat of the block is 3349J/kg C.
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why did the big bang not produce a significant proportion of elements heavier than helium?
Because there aren't any stable nuclei with 5 or 8 nucleons, heavy elements couldn't have formed shortly after the Big Bang.
Since helium-4 is the most stable light isotope, 4 H e was the primary product of the Big Bang nucleosynthesis. Twenty minutes after the Big Bang, helium-4 made up about 25% of the Universe's mass, with 1 H making up the majority of the remaining mass.Big Bang nucleosynthesis (abbreviated BBN, also known as primordial nucleosynthesis) is the formation of nuclei other than those of the lightest isotope of hydrogen (hydrogen-1, 1H, possessing a single proton as a nucleus) during the early phases of the Universe. Most cosmologists assume that primordial nucleosynthesis occurred between 10 seconds and 20 minutes after the Big Bang.To know more about Big Bang
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Where are infrared and ultraviolet light on the electromagnetic spectrum?
The infrared radiation has longer waves than red light. It has a lower frequency and contains less energy. While ultraviolet radiation has a shorter wavelength than blue light and delivers more energy per photon than visible light. These waves move up and down faster.
Visible light neighbours on the electromagnetic spectrum are infrared radiation on one side and ultraviolet radiation on the other. Infrared has longer waves than red light and oscillates at a lower frequency and contains less energy.
Infrared radiation also known as thermal radiation is a band in the electromagnetic spectrum with wavelengths above red light between 780 nm and 1mm.
Ultraviolet radiation lies between visible light and x-rays along the electromagnetic spectrum. The range of wavelength is between 10 and 400 nanometres.
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consider the two stars in the constellation orion, rigel with an apparent magnitude of 0.18 and saiph with an apparent magnitude of 2.07.which star is brighter, rigel or saiph?
The two stars in the constellation orion, rigel with an apparent magnitude of 0.18 and saiph with an apparent magnitude of 2.07 and Brightest Star is rigel.
What is Rigel?A blue supergiant star in the constellation of Orion is called Rigel. The Bayer designation for it is Orionis, which can also be spelled Beta Orionis or Ori in Latin. A stellar system of at least four stars that, to the unaided eye, appears as a single blue-white point of light contains Rigel as its brightest and most massive member. Rigel also serves as the star system's eponym. The distance between this system and the Sun is roughly 860 light-years (260 pc).Rigel, a star with the spectral classification B8Ia, is estimated to be between 61,500 and 363,000 times more massive and bright than the Sun, depending on the methodology and presumptions utilised. Its radius exceeds 70 times that of the Sun.To learn more about Rigel refer to:
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Which refers to any disturbance that carries energy from one place to another through matter and space?.
A wave is the disturbance that carries energy from one place to another through matter and space.
A wave:
Transfers energy.Usually involves a periodic, repetitive movement.Does not result in a net movement of the medium or particles in the medium (mechanical wave).Wave Speed Formula:
It is the total distance covered by the wave in a given time period. The formula for wave speed is given as;Wave Speed = Distance Covered/Time takenProperties of Waves:
Amplitude – Wave is an energy transport phenomenon. Amplitude is the height of the wave, usually measured in metres. It is directly related to the amount of energy carried by a wave.Wavelength – The distance between identical points in the adjacent cycles of crests of a wave is called a wavelength. It is also measured in metres.Period – The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. As the period is time, hence is measured in units of time such as seconds or minutes.Frequency – Frequency of a wave is the number of waves passing a point in a certain time. The unit of frequency is hertz (Hz) which is equal to one wave per second.The period is the reciprocal of the frequency and vice versa.
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A loop is placed in a region where the magnetic field is changing. At t = 0 s the magnetic field is 1 t directed into the page. Over a period of 2 s the field changes uniformly to 1 t directed out of the page.
A circular loop carrying current has no magnetic field at its center.
What is the magnetic field's direction at the loop's center?The magnetic field inside the loop will either be oriented along the axis or counter clockwise depending on the direction of the current. A current-carrying circular loop will have its magnetic field oriented along its axis at its center.
What changes in the magnetic field occur as the loop's radius grows?With an increase in the circular loop's radius, the magnetic field intensity drops. As more electric current flows through the circular wire loop, the magnetic field becomes more intense.
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one brand of dog whistles claims a frequency of 23.0 khzkhz for its product. what is the wavelength of this sound? express your answer in centimeters.
1.478 cm is the wavelength of this sound.
What is wavelength of sound?The separation between neighboring identical portions of a sound wave is consequently known as its wavelength. The separation between adjacent compressions in a sound wave is equal to one wavelength, just to the distance between adjacent crests in a transverse wave.
There are three types of sound waves: pressure waves, mechanical waves, and longitudinal waves.
We know that,
wavelength and frequency of sound are related with the relation,
λ = v/f
Given,
velocity of sound in air (v) = 340 m/sec = 34000 cm/sec
frequency (f) = 23 KHz = 23 × 10³ Hz
or, λ = (34000 cm/sec) / (23 × 10³)
or, λ = 1.478 cm
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Galaxies
A. are not known for certain to exist.
B. contain many millions of stars, and some contain a billion or more.
C. are too far away to photograph clearly.
D. have very little, if any, mass.
when cassini, a saturn-orbiting spacecraft, made its first flybys of enceladus in 2005, what unusual discovery did it make, and what did this imply?
Cassini recorded the water geysers at the south polar region which suggests that the particles of Saturn's E ring are provided by Enceladus.
What makes Enceladus so special?According to research, Enceladus likely possesses hydrothermal vents that pour hot, mineral-rich water into its ocean in addition to having most of the chemical components required for life. Enceladus, which is about the same width as Arizona, has the solar system's whitest, most reflective surface.When the spacecraft Cassini did its first flyby of Enceladus, the sixth largest moon of the planet Saturn, it discovered that the magnetic field of Saturn was deflected nearby signifying the presence of an atmosphere which might be thin but still significant. Cassini also recorded the water geysers at the south polar region which suggests that the particles of Saturn's E ring are provided by Enceladus.
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