The lowest note on a piano is
27. 5 Hz. To fit inside the piano,
the string for the low note can't be
longer than 1. 20 m. If it takes the
full length, what is the speed of
the wave in the string?
(Unit = m/s)
Answers
The speed of the wave in the string if it takes the full length for the lowest note on a piano (27.5 Hz) is 33 m/s.
What is Wave?
A wave is a disturbance or variation that travels through a medium, transferring energy from one point to another without the overall movement of the medium itself. Waves can take many forms and occur in many different physical systems, such as water waves on the surface of a lake, sound waves traveling through the air, or electromagnetic waves (such as light) traveling through space.
This is much higher than the speed of sound in air (343 m/s at room temperature), which means that the wave travels through the string much faster than it would through the air. However, this speed is not the speed of the wave we are interested in, since it would only apply if the wave were traveling along an infinitely long string. In reality, the wave is confined to the length of the string, so its speed is lower.
To find the speed of the wave in the string, we need to consider the effect of the boundary conditions at the ends of the string. The ends of the string are fixed, which means that the wave must have a node at each end. This reduces the effective length of the string to (1/2)λ:
L' = (1/2)λ = (1/2)(2.40 m) = 1.20 m
Now we can calculate the speed of the wave in the string:
v = fλ = (27.5 Hz)(1.20 m) = 33 m/s
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Related Questions
Mr. Temper, a 5-foot, 4-inch, 100-pound hothead, tells Mr. Big, a 300-pound professional wrestler, that he is going to "make him regret he set foot in this bar." At the same time, Temper clenches and raises his fists. Big looks at Temper from head to toe and responds, "yeah, right." Big can sue Temper for: a. assault
b. battery
c. assault and battery
d. Big has no cause of action
Answers
Big has no cause of action against Temper. In this scenario, while Temper may have made a verbal threat and raised his fists in a confrontational manner, there is no indication that he physically touched or harmed Big.
Assault refers to the act of intentionally causing apprehension or fear of imminent harmful or offensive contact. Battery, on the other hand, involves the intentional and harmful or offensive physical contact with another person without their consent.
In this case, Temper's actions may constitute assault due to the verbal threat and raising his fists, creating an atmosphere of fear or apprehension. However, since no physical contact or harm occurred, battery is not applicable. Therefore, the appropriate response is option d: Big has no cause of action against Temper.
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For this object, what color will you observe?
Answers
Answer:
blue
Explanation:
blue is the only color being reflected, meaning it's the only one that will be visible
In a domestic electric circuit (220.V),an electric kettle of 3kW power rating is operatedthat has a current rating of 4A. What result do you expect? Explain.ii)In our homes there are two separate circuits one for high power rating appliances and other for low power rating appliances.Why?Givereasons.
Answers
Answer:
(i) It will take longer (75/22 times) the time to boil a given quantity of water compared to when the current is working at its rated capacity
(ii) The reasons are;
(1) For economy; most of the appliances in the home only require low power circuitry with thinner wire while a separate high power circuitry is created directly from the main supply for the high electric power rated appliances
(2) For safety; to prevent the over heating of the electric circuits when an high electric power appliance needs to be connected an high power electric power outlet has to be specified
Explanation:
(i) The power rating of the kettle = 3 kW
The voltage rating of the circuit, V = 220 V
The current rating, I = 4 A
The formula for electric power = I² × R = I × V
Therefore, we have;
Power produced = 220 V × 4 A = 880 V·A = 800 W
Hence, since the power produced is below the power rating of the electric kettle, it will take a longer time to boil a given amount of water than specified by the kettle manufacturer
The energy supplied H = V×I×t
Where:
t = Time in seconds
Therefore, we have;
3 kW = 3000 W;
3000 × t₁ = 880 × t₂
t₂/t₁ =3000/880 = 75/22
Hence the kettle will take 75/22 multiplied by the time it takes when working at rating capacity to boil a given quantity of water
(ii) This is so because the power consumption already factored in the electrical installation as well as the type of appliances utilized in the home allow for several low power rating consumption and few high power rating consumption
Therefore, for both economy and safety the electrical circuit are split to allow for the use of very thick copper or aluminium electric cables in the high power rating electric circuits to which can be plugged high electric power consuming devices such as the water heater and electric cooker
The low electric power consuming devices, such as the electric bulb and fans are connected to the low or "regular" power rating electric circuit outlets
The current required for high power and low power appliances is different and also the fuse rating required for both the appliances different, so two separate circuits are used for high power and low power appliances.
The half life of
40
K is approximately 1.3 billion years, and it decays to
40
Ar, which is trapped in igneous rocks as
40
K decays. If we find a sample of granite in which the ratio of
40
Ar/
40
K is 3/1, then how old is the sample?
Answers
The half-life of 40K is approximately 1.3 billion years. Given a ratio of 40Ar/40K as 3/1 in a granite sample, we can estimate the age of the sample by understanding the decay process. Based on the given 40Ar/40K ratio, the age of the sample is approximately 650 million years.
Since the half-life of 40K is 1.3 billion years, this means that after each half-life, half of the 40K atoms will have decayed into 40Ar. Therefore, if the ratio of 40Ar/40K is 3/1, it suggests that three-quarters (or 75%) of the original 40K atoms have decayed into 40Ar.
To determine the age, we can calculate the number of half-lives that have occurred based on the remaining 25% of 40K. Since each half-life is 1.3 billion years, dividing the remaining 25% by 50% (half) gives us 0.5. Thus, the sample has undergone 0.5 half-lives.
Multiplying 0.5 by the half-life of 1.3 billion years gives us an estimated age of 0.65 billion years, or 650 million years, for the granite sample.
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A golfer hits a golf ball upwards at an angle. We can ignore air resistance on the ball.
Which diagram best describes the velocity vectors and trajectory of the golf ball's motion?
Answers
Answer:
Check the diagram from the photo
Explanation:
The input impedance of a 31 cm long lossless transmission line of unknown characteristic impedance was measured at 1 mhz. with the line terminated in a short circuit, the measurement yielded an input impedance equivalent to an inductor with inductance of 0.064 μh, and when the line was open-circuited, the measurement yielded an input impedance equivalent to a capacitor with capacitance of 40 pf. find z0 of the line, the phase velocity, and the relative permittivity of the insulating material.
Answers
where the plus sign is represented by n 0 and the minus sign by n 1. Up = 1.94 108 m/s =1 0.65c for n = 0 and r (= (c/up) 2 =1 1/0.652 for n = 0. Up is extremely sluggish and r is unreasonable high for these values of n.
How do you determine a lossless transmission line's input impedance?The input resistance of the a lossless power line with impedances Z0 = R and an impedance Z2 termination should be determined. As a result, Z0 = R is the input impedance, which is strictly resistive.
How do you determine a signal's characteristic impedance?Z0 = ZlZh, where Z0 = V 0/I0, yields the characteristic impedance. We simply display the input impedance Bi as a frequency function in the complex plane to determine Z0.
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Graphs are pictorial representations of
Answers
A graph is a pictorial representation of a set of objects where some pairs of objects are connected by links.
An image graph or pictograph is a graph used to display data that use pics or symbols to represent facts. The interconnected items are represented through factors termed vertices, and the hyperlinks that connect the vertices are known as edges. amongst different forms of information representations possible, the representation which includes images and pictorial representation of facts is referred to as a pictograph.
Pictographs and bar graphs are pictorial representations of numerical records. answer: real. with the aid of the definition, pictographs and bar graphs are pictorial representations of the numerical data. the records presented thru pictures or image of various objects is called a pictorial representation of facts. The photos of different objects are used to symbolize specific statistics, so such pictorial data are called pictographs.
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A positive charge, q1, is placed on the +y axis some distance from the origin (say a distance of d from the origin on the +y axis). Another negative charge, q2, is also placed on the +y axis, twice as far away from the origin. Also, the magnitude (absolute of the charge) is a factor of 3 larger than the magnitude of the q1. Lastly, a third charge of q3 which is positive, is placed on the +x axis a factor of 3.4 times closer than q1 and the magnitude of its charge is a factor of 3 times smaller than q1. The magnitude of the total electric field at the origin is 5.7 x 10^6 N/C. What is the magnitude of the electric field from q3 at the origin in 10^6 N/C? In other words, if the answer is 2.5 x 10^6 N/C, enter 2.5 Electric field -
Answers
The electric field from q₃ at the origin is 2.5 x 10⁶ N/C when q₁ is placed on the =y axis ome distance from origin .
What is the electric field?An area of influence created by an electric charge is known as the electric field. It is an invisible field that causes other charges in its vicinity to experience an electric force. Depending on the charge's sign, this electric force can be either attractive or repellent. The amount of charge and the distance from the charge determine the magnitude of the electric field.
Electric fields are utilized in numerous applications and are necessary for comprehending the behavior of electric circuits and devices.
E = kq/r²,
where k is the Coulomb's constant, q is the charge of the source, and r is the distance from the source to the location of interest, can be used to calculate this.
The Coulomb's constant is 8.99 x 109 Nm²/C²,
the charge of q₃ is q₁/3, and
the distance between q₃ and the origin is d/3.4.
As a result, the electric field from q₃ at the origin is given by
E = (8.99 x 10⁹ Nm²/C²)(q₁/3)/[(d/3.4)²,
which can be simplified to E = 2.5 x 10⁶ N/C.
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a rocket blasts off. in 10.0 seconds it's at 10,000 ft, traveling at 3600 mph. assuming the direction is up, calculate the acceleration. (hint: the rocket is not under constant acceleration)
a) 5280 ft/s^2
b) 528 ft/s^2
c) 100 ft/s^2
d) 200. ft/s^2
Answers
If a rocket blasts off. in 10.0 seconds it's at 10,000 ft, traveling at 3600 mph. assuming the direction is up, the acceleration of the rocket is 528 ft/s². T
The correct answer is option (b)
How do we calculate?a = Δv / Δt
a = acceleration
Δv = change in velocity
Δt = change in time.
1 mile = 5280 feet
1 hour = 3600 seconds
3600 mph = 3600 * 5280 ft / 3600 s = 5280 ft/s
Therefore , a = Δv / Δt substituting these, we have:
a = Δv / Δt = (5280 ft/s - 0 ft/s) / 10.0 s
a= 528 ft/s²
In conclusion, the acceleration of the rocket is 528 ft/s²
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The molar mass of nickel (I) chromate is Blank 1 grams per mole. Please round atomic masses to the nearest whole number.
Note answer is not 175.
Answers
The molar mass of nickel (I) chromate is 234 grams per mole.
To determine the molar mass of nickel (I) chromate, we need to first determine the chemical formula of the compound.
Nickel (I) has a +1 oxidation state, while chromate has a -2 charge. Therefore, the chemical formula of nickel (I) chromate is Ni2CrO4.
To calculate the molar mass of Ni2CrO4, we need to find the atomic masses of nickel, chromium, and oxygen, and multiply them by their respective subscripts in the chemical formula. Rounding to the nearest whole number, we get:
Ni: 2 x 59 = 118
Cr: 1 x 52 = 52
O: 4 x 16 = 64
Molar mass of Ni2CrO4 = 118 + 52 + 64 = 234 grams per mole.
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Think more about the situation in the question above. If you picked a "good" thing, how might
boundaries have helped you choose the "right" think instead? If you picked the "right" thing, how
did your boundaries help you?
PLEASE HELP RIGHT NOW !
Answers
your on here to lol we must be hella failing g
Which would ba another example of newtons first law?
Answers
TRUE/FALSE. two objects are said to be in thermal equilibrium. this means that the two objects have the same temperature have the same speed have the same thermal energy have the same pressure have the same internal energy
Answers
The two objects are said to be in thermal equilibrium when they have the same temperature, speed, pressure, and thermal and internal energy. This statement is true.
What is thermal equilibrium?When two components come into thermal contact but stop influencing one another’s temperatures, this is known as thermal equilibrium.
For example:
If a bottle of iced strawberry syrup is set on the table in the dining room, then the two objects are said to be in thermal contact. Meanwhile, they can be said to be in thermal equilibrium when the temperatures are the same after several hours.When a cup of hot coffee is on the table, then its temperature can be the same as the surrounding air after a period of time.Learn more about thermal equilibrium:
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A 71 kg hiker climbs to the top of a 4300 m -high mountain. The climb is made in 5. 5 h starting at an elevation of 2800 m. Calculate the work done by the hiker against gravity. Calculate the average power output in watts. Calculate the average power output in horsepower. Calculate assuming the body is 16% efficient, what rate of energy input was required
Answers
Answer:
A. 1.0x10^6 J
B. 53 W
C. 7.1x10^-2
D. 330 W
Explanation:
A) work done = mgh
so 71*9.8*1500=1.0x10^6 J
B) power = Work done/time
So P=1.0x10^6/19800 sec
P= 53 W
C) 1 HP =735 W
503 W= 7.1x10^-2 HP
D) efficiency =(output/ input) *100
so 16= (53/input) *100
input= 7.1x10^-2
If you have a train traveling 750 m in 63
seconds how fast is the train travelling?
Answers
Answer:
The train would be moving 47,250 mph
Why would batteries with high current capacity have a lower internal resistance than batteries with a low current capacity
Answers
According to the given information lower resistance allows for the efficient flow of current and reduces the energy loss due to heat generated within the battery.
Batteries with high current capacity are designed to deliver high amounts of current in a short amount of time. To achieve this, they are constructed with larger electrodes and thicker electrolytes, which results in a lower internal resistance. This lower resistance allows for the efficient flow of current and reduces the energy loss due to heat generated within the battery. Batteries with low current capacity, on the other hand, have smaller electrodes and thinner electrolytes, which leads to higher internal resistance and a lower ability to deliver high currents.Batteries with a high current capacity typically have a lower internal resistance than batteries with a low current capacity because the internal resistance of a battery is directly related to the amount of current that can flow through it.
Internal resistance is the resistance that a battery offers to the flow of current within itself, and it is caused by several factors, including the resistance of the electrolyte and the resistance of the electrodes. When a battery is designed to deliver high current, it needs to have a low internal resistance to allow the current to flow through it easily.
High-capacity batteries typically have a larger electrode surface area and a larger volume of electrolyte, which provides more pathways for the current to flow through, resulting in a lower internal resistance. Additionally, high-capacity batteries often have thicker electrodes
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A car (mass 1 000 kg) uses 50 000 J of energy (from fuel) to accelerate the car from rest to 5.5 m/s (about 20 km/h). How efficient is the car’s engine? ( Think, Eff = Eout/Ein x 100/1)
Answers
The energy output from the car is 15125 J and the input energy is given 50000 J. Thus, the efficiency of the car is 30.25 %.
What is engine efficiency?The efficiency of an engine is the ratio of its energy output to the energy input multiplied by 100. The efficiency of a heat engine can be found similarly using the input heat and output heat.
Given the mass of the car is 1000 Kg and it is accelerated to 5.5 m/s. Therefore the kinetic energy output is is calculated as follows:
KE = 1/2 mv²
= 1/2 1000 kg × (5.5 m/s)²
= 15125 J
The input energy is 50000 J. Therefore, the energy efficiency is :
efficiency = output energy / input energy × 100
= ( 15125 J/ 50000J ) × 100
= 30.25 %
Hence, the energy efficiency of the car is 30.25 %.
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what is the average velocity of earth in its orbit around the sun?
Answers
Answer:
420mph
Explanation:
This is a weird thing to do for an account.
A 550 kg sailboat is cruising
at 3 m/s. What is its kinetic
energy?
Answers
Answer:
247.5 J is the answer
Explanation:
Raymond and Julie ar driving to Santa Barbara.
They drive at an average speed of Bomon for
2.5 hours before he stopping for lunch. H
takes them 30 minutes to eat. After lunch
they continue driving or an average speed
of so mon for 3.0 nono . What is their
average speed, in miles
for the
3.5
entive
HID
per hour
Answers
compared to the flow of water in streams, most ground water moves relatively slowly. group of answer choices true false
Answers
Most ground water will move rather slowly when compared to how fast water moves in streams.
The statement is true
Why does water movement matter?Water quantity both affect flow. It is significant because it affects the habitats of living things in the stream as well as the water quality. Small streams are less able to dilute and degrade contaminants than large, fast running rivers, which can receive pollution releases with little impact.
How do we define flow?To "flow" is to move in a stream, just like water. As air circulates, the word "flow" also signifies to move. Flow is a noun that refers to motion that resembles a stream. The noun and verb 'flow' can be used in a variety of various contexts. Something flows when it moves like a stream of water.
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Brlan is repairing an old alarm clock. He needs to replace a device that converts the electric energy into sound energy. Which of these devices
should he use?
OA.
O B.
C.
battery
buzzer
motor
Switch
Answers
2. An object's weight is proportional to its _ or _ from another object
Answers
Answer:
mass
gravitational pull
As you walk to science class, you start out at a speed of 2 m/s, for a time of 120 seconds (you’re really excited to get to class). Then you see your friend and slow down to a speed of 0.5m/s for 30 seconds. You stop at your locker for 40 seconds (a speed of 0 m/s). You realize that you are about to be late so you hurry to class at a speed of 1 m/s and get to class just as the bell rings (4 minutes after your trip started). How far did you travel total?
Answers
The total travelled distance is • Speed, time and distance is one of the most common and important topics in the Mathematics or Quant section.
What is Speed?Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is travelling along a path. In other words, velocity is a vector, whereas speed is a scalar value.
For instance, 50 km/hr west denotes the velocity of a car whereas 50 km/hr (31 mph) denotes the speed at which it is moving down a route.
The average speed of an object is determined by dividing the distance traveled by the amount of time it takes the object to reach the distance.
Therefore, The total travelled distance is • Speed, time and distance is one of the most common and important topics in the Mathematics or Quant section.
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How did the motion of the ball change when John kicked it?
A
The ball continued moving in the same direction and its speed increased.
B
The ball continued moving in the same direction and its speed decreased.
C
The ball changed directions and its speed increased.
D
The ball came to a complete stop.
Answers
Answer:
The ball continued moving in the same direction and its speed increased.
When John kicked the ball, this was an example of motion. The ball's force increased because the ball got force from John's leg. So, the answer is option A.
Hope this helps you!
B2-RT15: RIFLE SHOTS-TIME TO HIT GROUND The rifles in the figures are being fired horizontally (straight outward, off platforms). The bullets fired from the rifles are all identical, but the rifles propel the bullets at different speeds. The speed of each bullet and the height of each platform are given. All of the bullets miss the targets and hit the ground. 500 m/s 800 m/s 800 m/s 1200 m/s 40 m 40 m 30 m 20 m Rank the time it takes the bullets to hit the ground. OR All All the same zero determine Cannot 4 Least Greatest Explain your reasoning.
Answers
THE ANSWER BELOW THE PICTURES.
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claim that states whether this scenario is a small scale event
or large scale event.
Answers
The Question is incomplete I can provide you with the details about the event. and the difference between small-scale events and large-scale events.
The difference between large-scale and small-scale events lies in their size, complexity, and behavior, and the methods and tools required to study them.
In English, an event refers to a particular occurrence or happening, often with some degree of significance or importance. It can refer to a wide range of activities, incidents, or experiences, from a simple everyday occurrence like having breakfast, to a major global event like the Olympic Games or a political summit. The term "event" generally implies a sense of purpose or meaning, and may involve one or more individuals, groups, or organizations.
The difference between a large-scale event and a small-scale event lies in the scale or size of the phenomena being observed. A small-scale event typically refers to an event that occurs on a small or local level, such as a single particle collision or chemical reaction. Small-scale events usually involve small amounts of energy and can be observed and studied in detail in a laboratory setting.
On the other hand, a large-scale event refers to an event that occurs on a large or global level, such as the movement of tectonic plates, the formation of galaxies, or the behavior of weather patterns. Large-scale events typically involve much larger amounts of energy and cannot be studied in detail in a laboratory setting. Instead, they require sophisticated scientific tools and techniques such as telescopes, satellites, and supercomputers to observe and analyze.
Another important difference between large-scale and small-scale events is that the former usually have more complex and unpredictable behaviors due to their size and complexity. This makes them more challenging to study and understand, as they are often influenced by a multitude of factors and interactions. Small-scale events, on the other hand, are usually simpler and more predictable, which makes them easier to study and control.
Therefore, the difference between large-scale and small-scale events lies in their size, complexity, and behavior, and the methods and tools required to study them.
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Before a collision, the x-momentum of an object is 8.0 × 103 kilogram meters/second, and its y-momentum is 1.2 × 104 kilogram meters/second. What is the magnitude of its total momentum after the collision?
Answers
The magnitude of its total momentum after the collision is 124.8 kg-m/sec.
What is momentum?The definition of momentum is the quality that a moving body possesses due to its mass and motion, and it is determined by multiplying the body's mass by its speed.
Given that the x-momentum of an object is 8.0 × 103 kilogram meters/second, and its y-momentum is 1.2 × 104-kilogram meters/second the resultant momentum after collision is 124.8 kg-m/sec.
The magnitude of its total momentum after the collision is 124.8 kg-m/sec.
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A vector points -1.55 units
along the x-axis, and 3.22 units
along the y-axis.
Find the direction of the vector.
Answers
Answer:\(\theta =64.29^{\circ}\)
Explanation:
Given
Vector Points -1.55 units along x-axis
i.e. 1.55 units along negative x-axis
and 3.22 units along Y-axis
Direction of vector
\(\tan \theta =\frac{3.22}{1.55}\)
\(\theta =tan ^{-1}(2.077)\)
\(\theta =64.29^{\circ}\)
Where \(\theta \) is the angle made by vector with x-axis as shown in the diagram
Answer:
The answer is 115.70
Explanation:
A fault in the switch caused a householder to receive a mild electric shock before a safety device switched the circuit off.
The mean power transfer to the person was 5.75 W.
The potential difference across the person was 230 V.
Calculate the resistance of the person
Answers
The resistance of the person is 9200 Ω if a fault in the switch is caused by a householder to receive a mild electric shock with the mean power transfer to the person as 5.75 W and potential difference across the person as 230 V.
The resistance of the person can be calculated using Ohm’s law.
Ohm’s law states that the potential difference across a conductor is directly proportional to the current flowing through it, provided that its temperature and other physical conditions remain constant.
It can be expressed as: V = IR,
where V is the potential difference, I is the current, and R is the resistance of the conductor.
Rearranging the equation, we get: R = V/ I.
Given that the mean power transfer to the person was 5.75 W and the potential difference across the person was 230 V, the current flowing through the person can be calculated using the formula:
P = IV
where P is the power ,V is the potential difference and I is the current flowing through the person
Rearranging the equation, we get: I = P/V
Substituting the given values, we get:
I = 5.75/230 = 0.025 A
Therefore, the resistance of the person can be calculated as:
R = V/I = 230/0.025 = 9200 Ω
Hence, the resistance of the person is 9200 Ω.
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