two identical loudspeakers 2.50 m apart are emitting sound waves into a room where the speed of sound is 340 m/s . abby is standing 5.50 m in front of one of the speakers, perpendicular to the line joining the speakers, and hears a maximum in the intensity of the sound.
Answers
Since Abby is standing at a point of maximum intensity, the sound waves from both the speakers must be in phase.
This means that the path difference between the waves from the two speakers must be an integer multiple of the wavelength.
Let's assume that the wavelength of the sound is λ. Then, the path difference between the waves from the two speakers at Abby's location is:
d = r2 - r1 = 2.5 m
where r1 and r2 are the distances from the first and second speakers to Abby, respectively. Since Abby is standing at a point of maximum intensity, we know that the path difference must be an integer multiple of the wavelength:
d = nλ
where n is an integer.
Solving for λ, we get:
λ = d/n = 2.5/n
We also know that the speed of sound is:
v = fλ
where f is the frequency of the sound. Since we are not given the frequency of the sound, we cannot solve for λ directly. However, we can use the fact that Abby hears a maximum in the intensity of the sound to find the frequency.
At a point of maximum intensity, the sound waves from the two speakers must be perfectly in phase. This means that the path difference between the waves must be an integer multiple of the wavelength. If the path difference were not an integer multiple of the wavelength, the waves would interfere destructively and there would be a minimum in the intensity of the sound.
Since Abby hears a maximum in the intensity of the sound, we know that the path difference between the waves from the two speakers at her location is an integer multiple of the wavelength. We also know that the distance between the speakers is 2.5 m. Therefore, the maximum in the intensity of the sound occurs when the path difference is:
d = nλ = 2.5 m
Solving for λ, we get:
λ = 2.5/n
Since the speed of sound is 340 m/s, we can solve for the frequency of the sound:
v = fλ
340 m/s = f(2.5/n)
f = (340 m/s)n/2.5
Now, we can use the equation for the current due to a charge q moving in a circle with frequency f to find the current due to the electron in the first Bohr orbit:
i = qfev
where q is the charge of the electron, e is the elementary charge, and v is the speed of the electron in the first Bohr orbit. Since the electron in the first Bohr orbit is moving in a circle of radius r = 5.29 x 10^-11 m, its speed can be found using the formula for centripetal acceleration:
a = v^2/r
The force causing this acceleration is the electrostatic force between the electron and the nucleus:
F = kq^2/r^2
where k is the Coulomb constant. Setting these two expressions for force equal to each other and solving for v, we get:
v = (ke^2/mr)^1/2
where m is the mass of the electron.
Substituting this expression for v into the equation for the current, we get:
i = qfe(ke^2/mr)^1/2
Simplifying, we get:
i = (2.418 x 10^-24 A)(f/n)^1/2
where f is the frequency of the sound and n is the integer that gives the path difference between the waves from the two speakers. Note that the Bohr magneton is defined as:
μB = eh/4πm
where h is Planck's constant. Therefore, the magnetic moment of the electron in the first
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Related Questions
Venn diagrams show the similarities and differences between two items being compared. Similarities are listed where the circles overlap, and differences are listed where the circles are not overlapping. This Venn diagram is looking at different kinds of technologies.
Which titles best describe this diagram?
Title 1 should be Microtechnology, and Title 2 should be Nanotechnology.
Title 1 should be Nanotechnology, and Title 2 should be Microtechnology.
Title 1 should be Quantum Mechanics, and Title 2 should be Traditional Physics.
Title 1 should be Traditional Physics, and Title 2 should be Quantum Mechanics.
Answers
Venn diagram should be titled traditional physics
Based on the Venn Diagram, Title 1 should be Quantum Mechanics, and Title 2 should be Traditional Physics.
What is a Venn Diagram?A Venn Diagram is a diagram which shows the similarities as well as differences between two or more items.
Overlapping points show similarities while non-overlapping points show differences.
The Venn Diagram above illustrates Traditional physics and quantum mechanics.
Title 1 is quantum mechanics and Title 2 is Traditional physics.
Therefore, the Venn Diagram illustrates the difference and similarities between quantum physics and traditional physics.
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A skier is traveling fast down a mountain slope. The table shows data
collected on the skier at a particular instant.
Mass
64 kg
Weight
608 N
Velocity
21 m/s, forward
Force of skier pushing forward
45 N, forward
Which data are needed to determine the reaction force of the snow pushing
on the skier?
O A. The pushing force and the skier's mass
B. The skier's mass and velocity
C. The skier's weight and acceleration
D. The force of the skier pushing forward
Answers
Answer:
The pushing force and the skier's mass
(A) is correct option.
Explanation:
Given that,
Mass = 64 kg
Weight = 608 N
Velocity = 21 m/s
Forward force = 45 N
We need to calculate the reaction force of the snow pushing on the skier
Using given data,
The reaction force of the snow pushing on the skier is equal to the pushing force and the skier's mass.
Hence, The pushing force and the skier's mass
(A) is correct option.
The two key events in skiing are the air friction (air resistance) that pushes on a skier's body and the friction between the ski base and the snow. Thus, option A is correct.
What reaction force of the snow pushing on the skier?A thin lubricating water layer produced while skiing can be used to explain the low sliding friction between skis and snow. For sliding to take place, this extremely thin water film is necessary.
While numerous frictional forces work to counter the skier's motion, gravity acts to speed the skier down the hill. Downhill skiing heavily relies on reducing friction.
Therefore, forces from snow reactions, friction, and gravity. Skiers are subject to these factors. In order to maintain equilibrium, a skier must control these pressures through both proactive and defensive actions.
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A car that has a mass of 1000kg accelerates at 20m/s^2. Calculate the force
Answers
Answer:
200000 newtons
Explanation:
KE=1/2m*v^2
1/2*1000*20^2
1/2*1000*400
1000*200
200000
The crossbow was a more effective weapon than the normal bow because _____. it used a reel, giving more power to the bow string it was held horizontally it shoot a bolt rather than an arrow it could shoot harder and farther all of the above
Answers
Answer: E. All of the above
Hope this helps!
The crossbow was a more effective weapon than the normal bow because: it used a reel, giving more power to the bow string, it was held horizontally, it shoot a bolt rather than an arrow it could shoot harder and farther. All the options are correct.
What are the differences between a crossbow and a normal bow?A crossbow differs from a standard bow in a few significant ways. The way the bowstring is handled is one of the most obvious variations. Unlike a crossbow, which uses a "trigger" to hold the string in place, a traditional bow requires the archer to hold the string in place with their fingers. This enables the archer to hold the crossbow more loosely, which may improve its accuracy and ease of use.
In terms of how the bowstring is held, how the arrow is loaded and shot, as well as in terms of power and accuracy, a crossbow differs from a regular bow.
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In a collision that is not perfectly elastic, what happens to the mechanical energy of the system?.
Answers
In a collision that is not perfectly elastic the total mechanical energy of the system gets converted into other forms of energies.
In a perfectly elastic collision the momentum as well as the kinetic energy of the system before and after the collision are conserved.
It means that there is no loss of energy in any form.
But if we say that the collision is not perfectly elastic it means that the laws of energy is taking place.
This Loss of energy can be in any form like some loss in the form of heat energy or the sound energy.
This is why we say that if the collision is not perfectly elastic then some of the energy may get converted into other form of energies.
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PLS HELP ME THIS IS DUE TONIGHT
Answers
By listening for it underwater, using SONAR.
Hope this helped!
Please answer will mark brainlyist
Answers
Answer:
B) golf
Explanation:
i think
meaning of anode and cathode
Answers
Answer:
An anode is an electrode through which conventional current (positive charge) flows into the device from the external circuit, while a cathode is an electrode through which conventional current flows out of the device.
Explanation:
If you planned to bike to a park that was five miles away, what average speed would you have to maintain to arrive in about 15 min? (
Answers
The average speed you need to maintain is 0.33 miles per minute.
The average speed is the speed that you maintain throughout the journey. It is obtained as; Total distance covered/Total time taken
If we have the following information from the question;
Distance covered = 5 miles
Time taken = 15 mins
Then it follows that;
Average speed = Distance/time
Average speed= 5 miles/15mins
Average speed = 0.33 miles per minute.
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A 400 Kg truck rushing through the street at 20 m/s crashes into a 50 Kg car moving in the same direction at 2 m/s. after the collision the car moves at 142 m/s, what is the final velocity of the truck?
Answers
The final velocity or speed of the truck is about 2.5 m/s.
What is the momentum?We have to recall that in this case, the principle of the conservation of the linear momentum must come to mind. From the principle that we have it ought to be know that;
Momentum before collision = Momentum after collision
Then we would have;
(400 * 20) + (50 * 2) = (50 * 142) + (400 * v)
8000 + 100 = 7100 + 400v
8100 - 7100 = 400v
v = 1000/400
v = 2.5 m/s
The velocity is 2.5 m/s from the calculation that we have done.
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a coil with a self-inductance of 6.0 h is connected to a dc battery through a switch. as soon as the switch is closed, the rate of change of current is 2.0 a/s. what is the emf induced in this coil at this instant?
Answers
The emf induced in the coil can be calculated using Faraday's law of electromagnetic induction, which states that the emf induced in a coil is equal to the rate of change of magnetic flux through the coil.
In this case, the self-inductance of the coil is given as L = 6.0 H, and the rate of change of current is given as di/dt = 2.0 A/s. We can assume that the coil has no resistance, so there is no voltage drop across the coil due to its resistance.
The magnetic flux through the coil is given by the product of the self inductance and the current through the coil:
Φ = L * i
Taking the derivative of both sides with respect to time, we get:
dΦ/dt = L * di/dt
This represents the rate of change of magnetic flux through the coil, which is equal to the emf induced in the coil.
Substituting the given values, we get:
emf = dΦ/dt = L * di/dt = 6.0 H * 2.0 A/s = 12 V
Therefore, the emf induced in the coil at this instant is 12 V.
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Naci ( table salt ) is an example of a (n)
Answers
Salt, or NaCl, is an example of an ionic compound. Ionic compounds are formed when a metal combines with a non-metal through the transfer of electrons.
What are crystalline compounds?Crystalline compounds are compounds that have a well-defined, ordered, and repeating three-dimensional arrangement of atoms, ions, or molecules in a solid state. In a crystalline compound, the constituent particles are arranged in a highly ordered and repeating pattern called a crystal lattice.
In the case of NaCl, the sodium (Na) donates an electron to the chlorine (Cl), forming an ionic bond between them and resulting in the formation of an ionic compound. Ionic compounds typically have high melting and boiling points, are crystalline in structure, and conduct electricity when dissolved in water.
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formula for solving escape velocity
Answers
Answer:
\(v = \sqrt{ \frac{2gm}{r} } \)
where, g = universal gravitational constant,G
. If the electrical force of repulsion between two same amount of charges is 10 N, andthey are 30000 m apart. What is the magnitude of each charge?
Answers
Answer:
Explanation:
Given: q₁ = q₂,
F= 10 N,
distance between two charges, r = 30000 m.
We have, \(F = \frac{q_{1} q_{2} }{4\pi Er^{2} }\)
Hence, \(q_{1} q_{2} =F * 4\pi *E *r^{2}\)
E (epsilon) =\(8.85 * 10^{-12} C^{2} /Nm\)
Substituting the values, we have,
\(q_{1} q_{2} = 1 C\)
Hence \(q_{1} = q_{2} = 0.5 C\)
m
Calculate the net force needed to accelerate a 200 kg piano 0.25
Your answer should have two significant figures.
$2
N
Answers
The net force needed to accelerate a 200 kg piano is 50N
According to Newton's law of motion, the formula for the net force is calculated as:
∑F = ma
Given the following parameters
Mass = 200kg
acceleration = 0.25m/s²
Substitute the given parameters into the formula
∑F = 200 * 0.25
∑F = 50N
Hence the net force needed to accelerate a 200 kg piano is 50N
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Answer:
Explanation:
Calculate the net force needed to accelerate a 200 kg piano 0.25
Your answer should have two significant figures.
$2
What can a machine do?
O A. Decrease the work needed to do something
B. Make the work you do feel easier
C. Multiply the energy of a system
O D. Create energy in the form of work
Answers
Answer:
B. Make the work you do feel easier
Answer:
Something a machine can do is Decrease the work needed to do something and a machine can also do make the work you do easier.
Explanation:
Hdhdhdhdhdhgsgdgs
Plls
Answers
All the answers are in the pics I have sent. I hope this will help you. Have a good day!
Which is defined as the statement that answers the scientific problem based on the results of the experiment?
Answers
Conclusion statement defines the answer of a scientific problem based on the result of the experiment.
A scientific problem is solved by the scientific methods. A scientific method is the step-by-step approach to a conclusion of the problem. It may include the following steps.
Observation: It is the first step of the method. It is based on that how do you see the problem.
Hypothesis: It is the result you think that you will get.
Prediction: It is based on your scientific knowledge. If our hypothesis is correct than our prediction will also be true.
Experiment: It is the system or mechanism designed by you to test your hypothesis.
Conclusion: It is the final result based on the experiment of the method. This statement tells you whether your hypothesis is true or not.
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PLSSS HELP MEEEE
When copper combines with oxygen to form copper (II) oxide, the charge of the copper ion is
a.
Cu1+.
c.
Cu3+.
b.
Cu2+.
d.
Cu4+.
Answers
Answer:
Cu2+
Explanation:
According to Hubble's Law, the greater a galaxy's redshift, the:
Select one:
A. younger it is.
B. closer it is to us.
C. faster it's approaching us.
D. farther it is from us.
E. greater its mass.
Answers
Answer:
D. Farther it is from us
Explanation:
Hubble's law states v=H(0) D, where v is recessional velocity, H(0) is the Hubble's constant, and D is the proper distance.
Also, the redshift is directly proportional to the recessional velocity.
So, the greater the distance to a galaxy, the greater its redshift and vice-versa.
Hubble's Law states that the greater a galaxy's redshift, the farther it is from us. The redshift indicates the speed at which a galaxy is moving away, under the expanding universe theory.
Explanation:According to Hubble's Law, the greater a galaxy's redshift, the farther it is from us. This law, established by Edwin Hubble, suggests a direct proportionality between the redshift of a galaxy and its distance from us. Essentially, the more a galaxy's light shifts towards the red end of the spectrum ('redshift'), the greater the galaxy's distance. This is because the redshift is indicative of the speed at which a galaxy is moving away from us, a concept that falls under the larger umbrella of the expanding universe theory. So, answer choice (D) is correct.
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A 9.32 10! Car is traveling West on I4 towards the “Affle” house. Let the force onto
the wheels be set to be twice that of the car's total weight. The coefficient of kinetic
friction is said to be 0.222.
a. Determine the acceleration of the car
Answers
The acceleration of the car is 17.44 m/s²
What is friction?Friction is the opposition to the relative motion of an object over another.
Friction is a contact force that exists between two objects at their surfaces of contact.
Frictional force = Coefficient of friction * Normal reaction
The mass of the car = 9.32 * 10² Kg
Weight of the car = 9.32 * 10² * 9.81 = 9142.92 N
Frictional force = 0.222 * 9142.92 N
Frictional force = 2029.73 N
Force on the wheel = 9142.92 N * 2 = 18285.84 N
Net force = mass * acceleration = 18285.84 N - 2029.73 N
mass * acceleration = 16256.11 N
acceleration = 16256.11/932
acceleration = 17.44 m/s²
In conclusion, the frictional force is a contact force which opposes relative motion of an object over another.
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Rinse chemicals from your hands and arms with water in the ________________________.
Answers
Rinse chemicals from your hands and arms with water in the sink
In the chemistry lab we use to work with chemical solutions, because of that we must learn what is the best way to manipulate the chemicals with we are going to work, so an proper way to maintain our hands and arms clean is using the lab's sink in order to wash our hands and arms with enough water
What is a chemical solution?In chemistry a solution is known as a homogeneous mixture of two or more components called:
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A freely falling object is dropped from rest after falling for 4 seconds how far has it fallen (m) a.) 4 b.)10 c.) 20 d.) 40 e.) 80 ab.) 200
Answers
=======================================================
Explanation:
We'll use the free fall formula, which is,
y = 0.5*g*t^2
where
t = time in secondsg = acceleration of gravity (in m/s^2)y = vertical distance the object has fallen (in meters)In this case,
t = 4 secondsg = 10 m/s^2 approximatelyNote: The freefall assumes the object is not thrown down, and simply dropped (so initial velocity is 0).
So,
y = 0.5*g*t^2
y = 0.5*10*4^2
y = 0.5*10*16
y = 5*16
y = 80
The object has fallen about 80 meters. This value is approximate because g = 10 is approximate. Use g = 9.81 for a more accurate value (though even then this value of g isn't exact either). In this case, your teacher has opted to use g = 10.
Another reason why 80 meters is an approximate value is because we haven't accounted for air resistance. As the object falls through the air, the air particles push up and resist the movement of the falling object, and therefore slow it down. Think of a parachute. For entry level physics courses, you'll ignore air resistance as it greatly complicates the problem. Though it's handy to keep it in mind for later physics courses down the road.
If the distance between two point charges is tripled, the mutual force between them will be changed by what factor?
Answers
If the distance between two point charges is tripled, the mutual force attraction between them will be reduced by a factor of 1 by 9th.
The square of the separation distance is inversely correlated with the electrostatic force which is the mutual force of attraction. F is therefore nine times smaller, or one-ninth the original value if the distance between the charges is made three times larger.
A point charge is defined as a charge which doesn't have any area or volume and hence it appears as a point.
The mutual force of attraction which is also referred to as the electrostatic force of attraction is defined as the force that exists between two charged particles in a 3D space.
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the following expressions are for kinetic energy (k), spring potential energy (usp), and gravitational potential energy (ug): k
Answers
The kinetic energy of an object is equal to 1/2mv^2, where m is the mass of the object and v is the velocity of the object.
The spring potential energy of an object is equal to 1/2kx^2, where k is the spring constant and x is the displacement of the object from the equilibrium position. The gravitational potential energy of an object is equal to mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height of the object.
The Three Types of EnergyThere are three types of energy that are important in physics: kinetic energy, spring potential energy, and gravitational potential energy. Kinetic energy is the energy of motion, spring potential energy is the energy stored in a spring, and gravitational potential energy is the energy associated with gravity.
Kinetic energy is important because it is the energy that objects have when they are in motion. The kinetic energy of an object is equal to 1/2mv^2, where m is the mass of the object and v is the velocity of the object. This means that the kinetic energy of an object increases as the mass of the object increases or as the velocity of the object increases.
Spring potential energy is important because it is the energy that is stored in a spring. The spring potential energy of an object is equal to 1/2kx^2, where k is the spring constant and x is the displacement of the object from the equilibrium position. This means that the spring potential energy of an object increases as the spring constant increases or as the displacement of the object from the equilibrium position increases.
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HELP FAST What is voltage, and what is its relationship to amperage and power?
(10 points)
Answers
Answer:
Amperage is the rate of electrical charge per time.
1 amp = 1 coulomb / second
Power is the product of amperage and voltage.
P = IV
Explanation:
Anyone.... help with this two questions...
Answers
A girl on a skateboard (total mass of 40kg) is moving at a speed of 10m/s at the bottom of a long ramp. The ramp is inclined at 20 degrees with respect to the horizontal. How far must she travel upward along the ramp before stopping?
Answers
Urgent!!!!
Please HELP
Answers
the weight of a body of certain mass become zero in space.why?
Answers
Answer:
There is no force in space.
Explanation:
Weight is the gravitational force acting on the mass as in space there is no gravity so weight appeares as zero
Answer:
It is because of gravity that your weight of a certain mass becomes zero in space.
Explanation: