If the tension in the rope is 120 nn. 1579.72 work is done on the crate to move it 18 mm.
What is work ?
Work in physics is the energy that is transferred to or from an item when a force is applied along a displacement. In its simplest form, it equals the product of the force's magnitude and the distance traveled for a constant force directed in the same direction as the motion.
[tex]\begin{aligned}W & =F \cdot d \cos \theta \\& =120 \times 18 \times \cos 43^{\circ} \\& =1579.72 \mathrm{~J}\end{aligned}[/tex]
Work is the result when there is a transfer of energy and force is applied to move an object into wherever the force is directed. Therefore, energy and force are both involved in doing work.
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part e the sum of the electrical and magnetic energies in an l - c circuit is 0.800 j . at a certain instant the energy is exactly half electrical and half magnetic, the capacitor charge is 5.30 mc , and the current is 8.00 a . find the capacitance.
The magnetic energy that is created around the inductor is where this energy is actually kept. Again, think about the circuit we created with two coils wound on base of one another.
The electrical energy is created by the motion of negative charge to and fro and this flow of electrons create electrical energy.
Given,
sum of magnetic and electric energy = 0.800 J
Capacitor charge = 5.50 mc
Current = 8 A
V = 10
Capacitance = 8 * 10 = 80
Therefore the capacitance of the energized capacitor is 80 F
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three children are riding on the edge of a merry-go-round that is 115 kg, has a 1.7-m radius, and is spinning at 24 rpm. the children have masses of 32, 34, and 40 kg. (a) if the children with masses of 34 and 40 kg move to the center of the merry-go-round, what is the new angular velocity in rpm?
The new angular velocity is 27.7 rpm
From the question, we have
ω = 22 rpm = angular velocity with all children on the edge,
ω' = angular velocity after m2 moved.
From conservation of angular momentum, we have
Mr²ω'/2 + m1r²ω' + m3r²ω' = Mr²ω/2 + m1r²ω + m2r²ω + m3r²ω
ω' = ω(M/2 + m1 + m2 + m3)/(M/2 + m1 + m3)
ω' = 22×(115/2 + 32 + 34 + 40)/(115/2 + 32 + 40)
= 27.7 rpm
The new angular velocity is 27.7 rpm
Complete question:
three children are riding on the edge of a merry-go-round that is 115 kg, has a 1.7-m radius, and is spinning at 24 rpm. the children have masses of 32, 34, and 40 kg. (a) if the children with masses of 34 and 40 kg move to the center of the merry-go-round, what is the new angular velocity in rpm?
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jasmine fell on her arm during a tennis match. when the trainer examines jasmine, she asks jasmine if she can turn her arm in a way that allows her to show the trainer the palm of her hand. what type of motion would this movement most accurately demonstrate?
The motion that the movement of jasmines arm accurately demonstrate circular motion.
What is circular motion?A circular motion is a movement or rotation of an object around the circumference of a circle. It can be uniform, with a constant angular rate of rotation and speed, or non-uniform, with a variable rate of rotation.A net inward or "centripetal" force is required for circular motion. In fact, if the forces are balanced, a moving object will continue to move in a straight line at a constant speed.Circular motion can be classified as either uniform or non-uniform. In uniform circular motion, the angular rate of rotation and speed are constant, whereas in non-uniform motion, the rate of rotation changes. During circular motion, the velocity vector changes direction at each point on the curve.To learn more about circular motion refer to :
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A wave with a wavelength of 3 m travels with a frequency of 450 Hz. What is its speed? Answer quickly.
The speed of a wave with a wavelength of 3m and frequency of 450Hz is 1350 meters per seconds.
How to calculate the speed of a wave?Wavelength is simply the distance over which the shapes of waves are repeated. It is the spatial period of a periodic wave.
It is expressed as;
λ = c ÷ f
Where c is speed, f is frequency and λ is wavelength.
Given the data in the question;
Wavelength λ = 3mFrequency f = 450 Hz = 450 s⁻¹Speed c = ?Plug the given values into the above formula and solve for speed v.
λ = c ÷ f
c = λ × f
c = 3m × 450s⁻¹
c = 1350 ms⁻¹
Therefore, the speed of the wave is 1350m/s.
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sven has also reached the finals of a strength competition and has to pull a city bus as far as he can. one end of a rope is attached to the bus, while the other end is tied around sven's waist. the rope is perfectly horizontal during the pull. during his pull, sven transfers 5000 joules of energy to the bus in the form of work. while sven is pulling, a rolling friction force of 1920 n also acts on the bus over a distance of 2.19 meters. if the bus started at rest, what is the bus' kinetic energy (in joules) at the moment before sven stops pulling?
The bus' kinetic energy (in joules) at the moment before sven stops pulling is 1195.2 Joules.
The energy associated with an object’s state of motion is Kinetic energy is a scalar quantity that is never negative in value and formula is K.E = 1/2mv^2.
The kinetic energy for the x, y, and z components are additive, Kinetic energy is relative to the motion of observer’s reference frame, since speed and velocity are as well.
An object’s kinetic energy depends more on its speed than its mass. Any change in an object’s speed will affect a change in its kinetic energy.
Given,
Frictional force (f) = 1920 N
Distance Cover (x) = 2·19 m
Then energy loss due to frictional force = fx
= 1920 × 2.19
= 4204.8 J
Energy apply by Sven is 5400 J
Rest of the energy. Kinetic is used to increase the kinetic energy of bus. So kinetic energy of the bus = 5400-4204.8
= 1195.2 J
When sven stops pullin, bus's kinetic energy is = 1195.2 J
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this problem occurs in petroleum firefighting when fire streams are applied to the burning liquid surface at such an angle that hot and / or burning oil is forced over the edge of the tank. the oil then flows down the side of the tank and you are now confronted with a fire on the ground as well as the one in the tank. this best defines which problem?
Petroleum has less density than water. So, when fire streams are applied to the burning liquid surface at such an angle that hot and / or burning oil is forced over the edge of the tank, the oil then flows down the side of the tank and you are now confronted with a fire on the ground as well as the one in the tank.
What are the reasons not to use fire streams during deal with burning oil?When you spray water on a regular fire, you're attempting to lower the flame's temperature and contain the fire.
Fuel for an oil fire is oil. Temperature and oxidizer are present in a fire (oxygen). Due to the fact that oil is lighter than water, an explosion may result if it floats above water while water sinks beneath oil.
Consequently, water shouldn't be used to put out oil fires.
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acceleration is generally defined as the time rate of change of velocity. when can it be defined as the time rate of change of speed? group of answer choices when moving in a straight line, the time rate of change of speed is called velocity. when moving in a circle, the time rate of change of speed is always zero. when moving in a circle, the time rate of change of speed is called average speed. when moving in a straight line, the time rate of change of speed is acceleration.
When we are moving in a straight line, velocity the time rate of change of speed is acceleration.
Velocity can be described as a vector measurement of the charge and path of motion. Placed truly, speed is the velocity at which something moves in one course. The velocity of an automobile travelling north on a chief parkway and the velocity of a rocket launching into the area can each be measured using speed.
The distinctive styles of velocities are uniform speed, variable velocity, common pace and immediate pace. Uniform velocity: when a body is stated to be shifting with uniform speed if its average pace among any two factors along its course is equal in importance as well as path.
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in the absence of clothing between the barrel of a gun and the person being shot, about how far away does the shooter have to be in order to leave no soot or stippling around the gun shot hole?
Stippling is a cutaneous condition brought on by unburned gunpowder fragments. Stippling cannot be removed with water, in contrast to other things that may be deposited on the skin, such as soot. Stippling suggests that when the gun was discharged, it was less than two feet from the victim's body.
Stippling in gunfire is what?
Stippling is the term used to describe the occurrence of numerous punctate skin abrasions brought on by foreign objects contacting the skin's surface. 1. Gunpowder tattooing, also known as gunpowder stippling, refers especially to stipple marks left behind by gunpowder when it leaves a gun.
What does forensic stippling mean?
Stippling is the term used in forensic science to describe a pattern of gunshot wounds left on the skin as a result of being in close contact to a discharged weapon. Stippling is a technique used in gunsmithing to engrave designs on the grip of a firearm to increase friction and provide a more secure grip.
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which three astrophysical objects have been very historically important as standard candles? group of answer choices supernova remnants type ia supernovae quasars wn type luminous blue variables rr lyrae variables cepheid variables red giant stars type ii supernovae
Cepheid Variable stars and RR Lyrae stars are the most often used standard candles in astronomy. The absolute magnitude of the star can be calculated from its variable period in both circumstances.
The international candle is used to measure the intensity of a light source. It was initially defined as a one-sixth-pound sperm wax candle burning at 120 grains per second. Astronomers use it today to determine the brightness of objects in the night sky.
A standard candle is a known object that does not need to be measured. A candle is a light source that emits a visible beam of light to the human eye. A standard candle is a type of astronomical objects, such as a supernova or a variable star, that has a recognized luminosity due to some characteristic property of the material it is formed of.
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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 boy having a mass of 75 kg holds in his hands a bag of flour weighing 40N. With what force does the floor push
up on his feet?
The force experienced by the boy on his feet is 775.75N.
Calculation of total ForceGiven Data
Mass of the boy= 75kgWeight of the bag = 40NLet us begin by calculating the total weight in the system
Weight of the boy= mg
W = 75*9.81
W = 735.75 N
Total weight of the system = 735.75+ 40
Total weight of the system = 775.75 N
A force is an influence that can cause an object's motion to change. A force can cause a mass object's velocity to change.
Force is an external agent that can change the state of rest or motion of a body.
We know that action and reaction are equal and opposite, hence the force experienced by the boy on his feet is 775.75N
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for the oscillation of a simple pendulum, the time for the mass moving from the left-most to the equilibrium position is 0.5 s. find the length of the pendulum (in m)
The length of the pendulum (in m) is : 0.99m
Time period to reach from left most position to equilibrium position = 0.5s =t
Time period is defined as the time taken to complete one full oscillation
T = 0.5*4 = 2s
for sample pendulum
T = 2π[tex]\sqrt{\frac{l}{g} }[/tex]
2 = 2π[tex]\sqrt{\frac{l}{9.81} }[/tex]
l = 0.99m
The period of the pendulum does not depend on the mass of the sphere, only on the length of the chord. Two pendulums with different masses but the same length have the same period. Two pendulums of different lengths have different periods. A pendulum with a long string has a long period
A simple pendulum consists of a sphere (mass point) m suspended from a (massless) cord of length L and fixed at a pivot point P. When shifted to the initial angle and released, the pendulum swings back and forth in a periodic motion. Applying Newton's second law to a rotating system gives the equation of motion for a pendulum.
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what is the minimum speed that the bucket must swing so that the bucket does not come crashing down at the top of its loop
The minimum speed that the bucket must swing so that the bucket does not come crashing down at the top of its loop is v = [tex]\sqrt{rg}[/tex]
Fc = Fg
mac = mg
ac = g
ac = v^2/r
v^2/r = g
The pace at which the distance a moving item travels changes is measured as speed. Since speed is a scalar, it has magnitude but no direction as a unit of measurement.
Speed is the rate at which anything moves over a predetermined distance.
an object that moves quickly and with high speed, covering a lot of ground in a short time. A slow-moving object with a low speed, on the other hand, covers a comparatively short distance in the same amount of time. An item with zero speed is stationary.
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a force of 15n is used to push a box along the floor distance of 3 meters. find the amount of work done
Answer:
to find the amount of work done, you need to calculate the force applied to the box times the distance over which it is applied. In this case, the force applied to the box is 15N and the distance over which it is applied is 3 meters, so the amount of work done is 15N * 3m = 45N*m.
Explanation:
It's important to note that work is a scalar quantity, not a vector quantity. This means that it has only magnitude and no direction. The direction of the force applied to the box and the direction of the displacement of the box are not relevant in calculating the amount of work done.
Important Formulas:
[tex]w=Fd[/tex]
work(measured in joules) = force(measured in newtons) * distance(measured in meters)
__________________________________________________________
Given:
[tex]F=15N[/tex]
[tex]d=3m[/tex]
[tex]w=?[/tex]
__________________________________________________________
Finding work:
[tex]w=Fd[/tex]
[tex]w=15\times3[/tex]
__________________________________________________________
[tex]\fbox{w = 45J}[/tex]
you are experimenting with a stretched spring with your lab partner. you have a spring length of 3.05 meters, and you find that the vibration period of the 2nd harmonic is 0.370 s. what is the vibration frequency in hz? in radians per second? what is the wavelength of this vibration? what is the product of the frequency, in hz, and the wavelength?
The vibration frequency in Hz is 2.7 Hz. This is calculated by taking the inverse of the vibration period (1/0.370 s = 2.7 Hz).
The vibration frequency in radians per second is 17.1 rad/s. This is calculated by taking the vibration frequency in Hz (2.7 Hz) and multiplying it by 2π (2.7 Hz x 2π = 17.1 rad/s).
The wavelength of this vibration is 1.13 m. This is calculated by taking the length of the spring (3.05 m) and dividing it by the harmonic number (3.05 m/2 = 1.13 m).
The product of the frequency, in Hz, and the wavelength is 3.06 Hz-m. This is calculated by taking the frequency in Hz (2.7 Hz) and the wavelength (1.13 m) and multiplying them together (2.7 Hz x 1.13 m = 3.06 Hz-m).
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study the spectral types listed in appendix f for the 20 brightest stars and for the stars within 12 light-years of earth. why do you think the two lists are so different? explain.
The points about the stars from the appendix are: Sirius A is the most luminous star within 12 parsecs. It is also the brightest star in our sky, even though it is not the closest. The list of the brightest stars will include the very luminous hot stars from distances greater than 12 light-years, while the list of the fainter yet closer low-mass stars will not.
The list of stars within 12 light-years is volume-limited, which means that almost all of the stars within that distance are listed regardless of luminosity. Such a list is a better representative of the total population of stars and is more plausible to be dominated by low-mass stars. The list of brightest stars includes only those stars that are above a certain apparent brightness threshold.
Therefore, the faintest nearby stars are excluded, but the brightest and rarer hot stars are included in higher proportion than they are in a volume-limited list.
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the superposition of mechanical waves can be observed in the movement of waves in a ripple tank
A.) Bumper Cars B.) waves in a ripple tank C.)electromagnetic radiation D.)an orchestra . Therefore all of the above.
What does mechanical wave superposition entail?According to the principle of superposition for mechanical waves, the position of the medium's mass element at a place where two or more moving waves join is equal to the algebraic total of the positions originating from the individual waves.
When is a wave superposition possible?When two (or more) waves are traveling through the same medium simultaneously, the principle of superposition can be applied to them. Without causing any disturbance, the waves pass through one another.
What prerequisites must be met for two waves to superimpose?They overlap and produce a phenomenon called wave interference.
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The given question is incomplete, the complete question is:
The superposition of mechanical waves can be observed in the movement of :
A. Bumper Cars
B. waves in a ripple tank.
C. electromagnetic radiation
D. an orchestra
the latent heat for the water/steam transition is 2256 kj/kg, i.e., to convert 1 kg of water into steam requires 2256 kj. what is the latent heat per molecule of h2o? express your answer in joules and in ev.
H2O molecules have a latent heat of 124976.7 J/mol when expressed in joules. This is comparable to about 124976 electron volts. 7 J/mol equals 7.2 1020 eV.
Why do electron volts exist?When an electron accelerates in an electromagnetic current created by a one volt potential difference, it gains kinetic energy, which is measured in electron volts.
How many volts are there in an electron?The meaning of an electron energy (eV) is The amount of kinetic energy that an electron gains or loses when it goes from rest across a potential of one volt is known as an electron or electron-volt. Energy is measured in electron volts. 1.602176634 10-19 J is the equivalent of one electron volt.
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plane a is flying at 350 mph in the northeast direction relative to the earth. plane b is flying at 460 mph in the north direction relative to the earth. what is the direction of motion of plane b as observed from plane a?
Plae A is flying at 350mph in the northeast direction relative to the earth, meanwhile plan B is flying at 460mph in the north direction. Plane B is observed as it is flying in the northwest direction as observed from plane A.
When the two planes are flying, the speed of the objects are measured relatively to the sureface of the earth are the actual speed of the object.
To solve this case, we will use the relative velocity concept. The relative velocity defines the velocity of an object relative to another object. In this case, we want to know the velocity of Plane B relative to Plane A.
To find the relative velocity of plane B to plane A,we could use formula:
v(BA)² = v(B)² + v(A)² - 2.v(A).v(B).cos45°
where:
v(BA) = velocity of plane B relative to plane A
v(B) = actual velocity of plane B
v(A) = actual velocity of plane A
cos45° = cos of the angle between plane B and plane A's direction
Using the information given, we found that:
v(BA)² = 460² + 350² - 2(460)(350).cos45°
v(BA) ²= 106,411
v(BA) = 326.21 mph
Plane B will be seem as flying with 326.21mph to northwest direction relative to plane A.
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a wooden block rests on a ramp inclined at 30 degrees with the horizontal. how does the magnitude of the normal force on the block change if you increase the ramp to an incline of 45 degrees?
Assuming there aren't any frictional forces at play.
The block is simply being acted upon by its weight and the normal force.The weight can be represented graphically as a straight-down vector or as two parallel components with the slope's surface (axis of motion) and one component perpendicular to the slope's surface (opposite to the normal force).
How can the normal force be determined on a horizontal surface?When an item is supported exclusively by weight and normal forces, W = Fn, hence Fn = mg, for a horizontal surface. The normal force for an item across an inclined surface with an angle of is given by Fn=mgcos F n = m g c o s.
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0.2kg gingerbread man is resting on a table. What is the normal force applied by the table onto the gingerbread man?
The normal force applied by the table onto the gingerbread man is 1.96 N.
What is normal force?
The normal force is a type of force that is felt when a surface pushes against an object that is placed on that surface.
In other words, a normal force is a type of force directed opposite to the weight of an object. The normal force of an object is always directed upwards while the weight of the object is directed downwards.
According to Newton's third law of motion, the magnitude of the normal force of an object acting upwards is always equal to the weight of the object acting downwards.
The normal force applied by the table onto the gingerbread man is calculated as follows;
Fn = mg
where;
m is the massg is acceleration due to gravityFn = 0.2 kg x 9.8 m/s²
Fn = 1.96 N
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a car with good tires on a dry road can decelerate at about 5.0 m/s2 when braking. suppose a car is initially traveling at 55 mi/h. (a.) how much time does it take the car to stop? (b.) what is the stopping distance?
4.92s is the time, it takes for the car to stop.
60.47m is stopping distance, also called as deceleration.
What is deceleration and kinematic equation?
Deceleration is acceleration that takes place opposite to the direction of velocity. Here velocity always decreases.
Kinematic is study of motion without considering physical properties and forces acting on them. Kinematic equation deals with variables that are associated with kinematic namely, displacement, time, velocity and acceleration.
Thus to calculate time and deceleration, kinematic equation is used.
Calculation:a) From question vi=55mph = 24.6m/s and f=5.0m/s²
Therefore, vi-vf/f =t
t=24.6-0/5
t=4.92s
Thus, tie required to stop the car is 4.92s
b) Δx = vf²-vi²/2a
where vf= 0m/s (final speed)
vi= 55mi/h ≈ 24.59m/s (initial speed)
a=-5m/s² (deceleration)
Δx=0²-25.59²/-2.5≈60.47m
Thus, 60.47m is the stopping distance
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calculate the angle for the third-order maximum of 605 nm wavelength yellow light falling on double slits separated by 0.105 mm.
The angle for third order maximum is [tex]0.481^{\circ}[/tex] .
Given that, wavelength of yellow light is 605-nm. Distance between the slits on which the light is falling is 0.105 mm.
The angle for the the third order maximum can be calculated by the formula given below.
[tex]m \lambda=2 d \sin \theta[/tex]
where, λ is the wavelength of light, is the distance between the slits and is the order of diffraction.
For the third order,[tex]m=3[/tex].
Substituting the values in the above formula, we get the angle for the third order maximum.
[tex]\begin{aligned}& 3 \times 605 \times 10^{-9}=2 \times 0.105 \times 10^{-3} \times \sin \theta \\& \sin \theta=\frac{3 \times 605 \times 10^{-9}}{2 \times 0.105 \times 10^{-3}}\end{aligned}[/tex]
Simplifying the above equation as,
[tex]\begin{aligned}& \sin \theta=0.0084 \\& \theta=\sin ^{-1}(0.0084) \\& \theta=0.481^{\circ}\end{aligned}[/tex]
Hence, the angle for third order maximum is [tex]0.481^{\circ}[/tex].
What is the wavelength?
A quality of a wave that is the distance between similar points between two continually waves is called wavelength.
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Cedric is riding the free fall ride at six flags . If Cedric free falls from rest for 2.6 seconds . What will his final velocity be
The final velocity of the free fall was 2.6(a)
define acceleration ?
The rate at which an object's velocity with respect to time changes is referred to as acceleration in mechanics. It is a vector quantity to accelerate (in that they have magnitude and direction). The direction of the net force applied on an item determines the direction of its acceleration. According to Newton's Second Law, the amount of an object's acceleration is the combined result of two causes:
According to the materials used to make the item, the magnitude of the net balance of all external forces acting on it is inversely proportional to its mass, but the size of the net resultant force is directly proportional to the net force.
The acceleration unit in the SI is the metre per second squared.
the final velocity was
f=u + a t
f=0+ a(2.6)
=a(2.6)
the acceleration of the free fall ride was not mentioned in the question so upto the question detailing the final velocity was found to be 2.6(a)
here the mentioned a was called as the acceleration.
The final velocity of the free fall was 2.6(a)
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hyrum is at a concert when a flute player hits a very high note at the end of a song. which of the following best explains why the pitch of the note sounds so high? responses it has a long wavelength and high frequency. it has a long wavelength and high frequency. it has a short wavelength and high frequency. it has a short wavelength and high frequency. it has a long wavelength and low frequency. it has a long wavelength and low frequency. it has a large amplitude. it has a large amplitude. it has a small amplitude.
Its high frequency and brief wavelength The best explanation for why the note's pitch seems so high is what follows.
Which theory best explains why different people respond to the same stimuli differently?concept of signal detection. some people react differently to the same stimulus is explained by the signal detection theory. The experience, expectations, motivation, and alertness of an individual are a few variables that explain these variations.
What produces high or low sound?Pitch. Depending on how quickly an object vibrates, a different sound is produced. High-pitched sounds are produced when something vibrates quickly. Things that vibrate more slowly produce low-pitched sounds.
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a centrifuge in a medical laboratory rotates at an angu- lar velocity of 3 600 rev/min. when switched off, it rotates through 50.0 revolutions before coming to rest. find the con- stant angular acceleration (in rad/s2) of the centrifuge.
the con- stant angular acceleration (in rad/s2) of the centrifuge is α = -226.2rad/s².
Calculation :
We know that ,
W² = W₀ + 2αΔФ , W = 0 so
α = -W₀²/2ΔФ = -[tex](\frac{2\pi *3600}{60} )^{2} *\frac{1}{2*2\pi *50.0}[/tex]
= -72.0π
α = -226.2rad/s²
Angular acceleration refers to the rate of change of angular velocity over time. Since there are two types of angular velocity, spin angular velocity and orbital angular velocity, there are of course two types of angular acceleration, spin angular acceleration and orbital angular acceleration. Spin angular acceleration refers to the angular acceleration around the center of rotation of a rigid body, while orbital angular acceleration refers to the angular acceleration of a point particle about a fixed origin.
Angular acceleration is measured in angular units per unit time squared (radians per second squared in SI units) and is usually represented by the symbol alpha (α).
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If a conductor is connected to "ground", then what is the charge on it?
positive
neutral
negative
determined by other nearby charges
If the conductor is connected to the ground, then it has a neutral charge.
Earth acts as a zero potential ground. So when you connect a positively charged conductor to the ground, the positive charge flows into the ground, resulting in the flow of electrons from the ground to the conductor. A ground wire acts as protection against unstable currents.
Under normal circuit conditions, no current flows through the ground wire. However, when an electrical accident such as a short circuit occurs, the ground wire removes the unstable current from the electrical system and leads it to the ground. The ground wire can be finger-safe as long as there is no electrical surge that causes current to flow through the ground wire.
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if 8.0 mg of a radioactive substance naturally decays to 0.50 mg over 184 days, what is the half-life of the radioisotope?
According to the given statement 46 days is the half-life of the radioisotope.
What is radioisotopes used for?An unstable chemical element that releases radiation as it breaks down and becomes increasingly stable. Both the natural environment and a laboratory can produce radioisotopes. They are used in medical imaging research and therapy.
Briefing:A radioactive substance's half life can be predicted by:
Nt = No(1/2)^(t/th)
Nt is the amount remaining (mg)
No is the initial amount (mg)
t is the time elapsed, in days
th is the half life in days.
Nt = No(1/2)^(t/th)
0.50mg = (8.0mg)(1/2)^(184 days/th)
We can resolve this for Th using logs.
th = 46 days
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1 pts what is the speed over ground of an airplane flying at 100 km/h relative to the air caught in a 100 km/h right-angle wind? group of answer choices 100 km/h 0 km/h 200 km/h 141 km/h
What is the speed of an aircraft traveling at 100 km/h above the ground in relation to the air that has a 6 m/s right-angle crosswind at that same speed?
What really is speed in physics, and what is its measure?Speed is described as the rate at which a distance changes over time. It has a distance by time dimension. The basic value of distance with the basic unit of time are combined to form the SI unit of speed. The metric system uses meters per second as the unit of speed.
Which types of speed are there?Distance traveled in a unit of time is referred to as speed. It is the rate of movement of an object. Speed is defined as the amount of time it takes to cover a given distance. m/sec is the speed unit. The magnitude of the velocity vector is a scalar variable called speed.
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28102 a flat coil of wire consisting of 480 turns, each with an area of 70 cm, is positioned perpendicularly to a uniform magnetic field that increases its magnitude at a constant rate from -0.8 t to -0.75 t in 7.7 s. if the coil has a total resistance of 86 , what is the magnitude of the induced current when the field is -0.775 t?
The magnitude of current when a flat coil of wire consisting of 480 turns each with an area of 70 cm, is positioned perpendicularly to a uniform magnetic field that increases its magnitude at a constant rate from -0.8 t to -0.75 t in 7.7 s. if the coil has a total resistance of 86 is 0.025 A.
Given that magnetic flux is expressed as = NBA in this situation,
we know that N = number of turns and B = magnetic field.
We now know that the rate of change in magnetic flux will cause EMF in the coil, hence A = area of the loop.
EMF = NBA db/dt
Now, enter all variables to calculate the induced
EMF: (480)(70 * 10-2). [(-0.75) -(-0.8)]
According to Ohm's rule, current equals EMF divided by resistance, hence I = 2.18/86
I = 0.025 A
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