a 1020-hertz sound wave travels at 340 m/s in air with a wavelength of a) 30 m. b) 3 m. c) 0.333 m. d) 1 m. e) none of the above choices are correct.
Answers
The wavelength of the sound wave is equal to 0.333 m. Therefore, option (c) is correct.
What are frequency and wavelength?The frequency of the wave can be defined as the number of oscillations that occur in one second and can be expressed in hertz. The wavelength can be defined as the distance between the two adjacent points of a wave such as two crests or troughs.
The relationship between frequency (ν), speed of sound waves (V), and wavelength (λ):
V = νλ
Given, the frequency of the sound wave, ν = 10 Hz
The speed of the sound wave,\(V = 340 m/s\)
The wavelength of the sound waves can determine as follows
λ = V/ν = 340/1020 = 0.333 m.
Therefore, the wavelength of the sound wave is 0.333 m
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Related Questions
Galois drove 60.0 kilometers due west in 5.00 hours and then drove 43.0 kilometers due north in 3.00 hours.
(a) How far did he travel?
(b) What was his average speed?
(c) What was his displacement?
(d) What was his average velocity?
Answers
Answer:
Explanation:
See the attachment for the details. A right triangle is formed to find the hypotenuse of the two legs consisting of the actual driving distances and times. The hypotenuse gives the vector information for the displacement at the end of 8 hours of driving.
The individual driving times and distances are summed to provide:
(a) How far did he travel?
103 km
(b) What was his average speed?
12.88 km/h
(c) What was his displacement?
73.82 km
(d) What was his average velocity?
9.228 km/h
Which statement describes characteristics of a convex lens? A convex lens diverges light and curves inward. A convex lens diverges light and curves outward. A convex lens converges light and curves inward. A convex lens converges light and curves outward.
Answers
Answer:
D, A convex lens converges light and curves outward.
Explanation:
edge
A convex lens converges light and curves outward.
What is a convex lens ?A lens that is thin at the bottom and upper edges and somewhat thick in the middle is referred to as a convex lens. The edges are not bent inside, but rather outward.
Here,
In a convex lens, the light rays travelling parallel to its principal axis are converged by it (i.e., the incident rays are directed towards the principal axis).
Since all of the light rays that are refracted by a convex lens eventually converge at a single point, where the image is created, the convex lens is also known as a converging lens.
A converging lens produced a virtual image when the object is placed in front of the focal point.
Hence,
A convex lens converges light and curves outward.
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During a football workout two linemen are pushing on the coach and the sled. The combined mass of the sled and the coach is 300 kg the coefficient of friction of between the sled and the grass is. 800. The sled accelerates at a rate of. 580 m/s/s. Determine the force applied to the sled by the lineman
Answers
A football workout involves two linemen who are pushing on the coach and the sled. The sled and the coach's combined mass is 300 kg, while the coefficient of friction between the sled and the grass is .800. The sled accelerates at a rate of .580 m/s/s. We need to determine the force applied to the sled by the linemen.
The total force acting on the sled is:Force = Mass × AccelerationF = 300 kg × .580 m/s/s = 174 NSince the sled and the grass's coefficient of friction are known, we can determine the force applied to the sled by the linemen using the following equation:
Frictional Force = Coefficient of Friction × Normal Force
The normal force is equal to the weight of the sled and the coach. Thus,Normal Force = Mass × GravityN = 300 kg × 9.81 m/s/s = 2943 NFrictional Force = .800 × 2943 N = 2354.4 NThe force applied to the sled by the linemen is the difference between the total force acting on the sled and the frictional force.
Force Applied by Linemen = Total Force − Frictional ForceF = 174 N − 2354.4 N = −2180.4 NThe linemen are exerting a force of −2180.4 N on the sled in the opposite direction to the sled's movement. This is because the frictional force is greater than the total force acting on the sled.
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A person hears the echo of his own sound from a distance hill after 2 seconds . How far is the person from the hill , if the speed of sound is 330 m/s?
Answers
Answer:
the distance between the person and the hill is 330 m.
Explanation:
Given;
speed of sound in air, v = 330m/s
time of sound travel, t = 2 s
The distance between the person and the hill is calculated as;
\(Distance = Speed \ \times \ Time\\\\Time \ of \ echo = \frac{2\ \times \ distance}{speed} \\\\distance = \frac{Time \ of \ echo \ \times \ speed}{2} \\\\distance = \frac{2 \ \times \ 330}{2} \\\\distance = 330 \ m\)
Therefore, the distance between the person and the hill is 330 m.
why should a counterweight be moveable
Answers
A weight known as a counterweight is one that stabilizes and balances a mechanical system by exerting an opposing force.
Why do moveable flight control surfaces have large counterweights installed in the leading edge?A counterweight's function is to speed up and improve the efficiency of lifting the load, which conserves energy and reduces wear and tear on the lifting apparatus. A weight known as a counterweight is one that stabilizes and balances a mechanical system by exerting an opposing force.
To lift loads up to 120 tons, tower cranes are utilized at large building sites. In a tower crane, a fixed and a moveable counterweight are held by two arms that extend from the center of the structure. For the purpose of balancing the load, the operator moves the mobile counterweight.
For the purpose of providing offset forces in the flight controls, counter weights are used. With less pressure needed to move the controls, this gives them better "feel" and "feedback" forces.
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A counterweight should be moveable so as to make lifting the load in a faster and more efficient manner.
What is a counterweight?A counterweight is a weight which has a major purpose to help maintain the stability and balance of a mechanical system by exerting an opposing force. A counterbalance or counterweight is usually used to lift a load more quickly and effectively, which saves energy and reduces wear and tear on the lifting apparatus used with it.The potential energy obtained is equivalent to the work done to lift the counterweight.When the counterweight is being displaced by a force that is acting in the same direction as the applied force, the potential energy gained is equal to that distance it is working or kept.To know more about counterweight visit
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A hammer drives a nail into a piece of wood. Identify an action-reaction pair.Group of answer choicesThe hammer exerts a force on the nail; the wood exerts a force on the nail.The hammer exerts a force on the nail; the hammer exerts a force on the wood.The nail exerts a force on the hammer; the hammer exerts a force on the wood.The hammer exerts a force on the nail; the nail exerts a force on the hammer.
Answers
Newton's third law states that if an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A.
Let:
A = Hammer
B = Nail
so:
\(F_{AB}=-F_{BA}\)Therefore:
The hammer exerts a force on the nail; the nail exerts a force on the hammer.
The electric force between two or more charged objects depends on which of the following quantities?
a. charge and distance between the charged objects
b. quantity of charges and their masses
c. charge and mass of charged objects
d. mass and distance between the charged objects
Answers
The electric force between two or more charged objects depends on the charge and the distance between the charged objects
What is Coulomb's law?Coulomb's law states that the force of attraction or repulsion between two charged bodies is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. Coulomb's law shows the relationship between the force , charge and the distance between the bodies
therefore F= kq1q2/r²
where q1 is the charge of body 1 and q2 is the charge of body 2. r is the distance between them and k is called electrostatics constant which have a value of 9,×10⁹ Nm²/C²
Therefore what can affect the force between two charges are the product of the charge of the two bodies and the distance between the two charge.
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Which terms does velocity describe?
A. speed and momentum
B. gravity and direction
C. speed and direction
Answers
Answer:
c
Explanation:
The following force measurements were taken during actual testing of the lever pictured. What is the AMA of this lever?
-O 0.20
-5.5
-0.18
-2.75
Answers
Answer:
0.18
Explanation:
The force by effort on the lever is 5.5 N and the load is 1 N. Them actual mechanical advantage of the lever is 0.18.
What is mechanical advantage ?The lever's mechanical advantage is determined by the output force to input force ratio. This connection demonstrates that, assuming no losses from friction, flexibility, or wear, the mechanical advantage can be calculated from the ratio of the distances from the fulcrum to where the input and output forces are applied to the lever.
The ideal mechanical advantage is calculated as ratio of the distance from the load and the effort from the fulcrum. If we know the actual force acting on both side, we can calculate the actual mechanical advantage (AMA).
The force of effort = 5.5 N
force by the load on the lever = 1 N
AMA = load / effort
= 1 /5.5 = 1.8
Therefore, the mechanical advantage of the lever is 0.18.
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Question 50 Marks: 1 The amount of heat required to lower one pound of a product one degree Fahrenheit isChoose one answer. a. exothermal extraction b. the specific heat c. the coolant factor d. important to know
Answers
The correct answer is Specific heat.
The amount of energy required to raise the temperature of one pound of water by one degree Fahrenheit at standard atmospheric pressure is called specific heat in BTU (British Thermal Unit) which is a unit of measurement for energy used as per the British system.
BTU is used for measuring the heating or cooling capacity of an appliance as per the FPS system. For example, the BTU rating of a furnace or air conditioner indicates how much heat or cooling it can produce in a given period of time.
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how far would the moon be if its mass was doubled
Answers
Explanation:
If the moon doubled in mass, that means that the Earth will not experience a total solar eclipse like today. Also, if it doubled in mass, tide waves would increase in size, as the moon would be bigger and would have a bigger gravitational pull. Also, gravity would be different on earth because the moon is bigger (gravity law by mass). Also, the sky would be ‘smaller’ than our actual sky
Answer:
If the moon's mass doubles, the Earth will not witness a total solar eclipse as today. Also, if its mass doubled, tide waves would double in size since the moon would be bigger and have a stronger gravitational attraction. Also, because the moon is larger, gravity on Earth would be different (gravity law by mass). Also, the sky would be "smaller" than it is now.
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How did the Japanese Tsunami (2011) happen and explain why it did happen?
Answers
just ask safari
Explanation:
a person threw a small bundle toward their friend on a balcony 10 meters above them. how fast did they throw it up?
Answers
The speed with which they threw the bundle is 14 m/s.
What is the speed of the bundle?We know that the speed of the bundle can be obtained from the use of the equations of kinematics. Now we can use the equation of the upward motion under gravity here.
Using;
v^2 = u^2 - 2gh
v = final velocity
u = initial velocity
g = acceleration due to gravity
h = height
Now;
v = 0 m/s at the maximum height
u^2 = 2gh
We now have;
u = √2gh
u = √ 2 * 9.8 * 10
u = 14 m/s
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A
2.0
kg
2.0kg2, point, 0, start text, k, g, end text box is at rest on a table. The static friction coefficient
μ
s
μ
s
mu, start subscript, s, end subscript between the box and table is
0.40
0.400, point, 40, and the kinetic friction coefficient
μ
k
μ
k
mu, start subscript, k, end subscript is
0.20
0.200, point, 20. Then, a
5.0
N
5.0N5, point, 0, start text, N, end text horizontal force is applied to the box.
Answers
The estimate of the magnitude of the box's acceleration is a= 0 m/s².
What is frictional force?The force that is created between surfaces that are sliding against one another is known as the frictional force. Frictional force is referred to as a contact force because it develops whenever two surfaces come into contact. Walking on a road is a good example of frictional force.
Limiting value of frictional force = \(\mu_{N}\) = umg
\(\mu_{N}\) = 0.4×2×10 = 8 N
As applied force i.e. 5 N is less than limiting value of frictional force therefore the block will not move
hence
a= 0 m/s².
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Complete question is "A 2.0 kg box is at rest on a table. The static friction coefficient, between the box and table is 0.40, and
the kinetic friction coefficient is 0.20. Then, a 5.0 N horizontal force is applied to the box.
What is the best estimate of the magnitude of the box's acceleration?".
A=0 m/s2 is the estimated value for the box's acceleration.
How does frictional force work?Frictional force is the force produced when sliding surfaces come into contact with one another. Because it arises anytime two surfaces touch, frictional force is also known as a contact force. Frictional force can easily visualized by walking on a road.
Frictional force's maximum value is equal to umg = 0.4 2 10 = 8 N.
The block won't move since the applied force of 5 N is less than the frictional force's limiting value, hence a= 0 m/s2.
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An empty flask weighs 123.591 g. After vaporization of a sample of volatile liquid at a temperature of 99.9 oC, the flask was sealed, cooled to room temperature, and found to have a mass of 123.907 g. The atmospheric pressure was 760.2 mm Hg. The flask was rinsed and completely filled with water at 18.5 oC. The mass of the water-filled flask was determined to be 375.639 g. What is mass of the gas that fills the flask in grams
Answers
The mass of the gas that fills the flask is 0.316 grams. To find the mass of the gas, we need to consider the changes in mass and volume of the flask before and after vaporization.
Firstly, we calculate the change in mass of the flask after vaporization, which is 123.907 g - 123.591 g = 0.316 g. This change in mass represents the mass of the vaporized liquid.
Next, we need to determine the volume of the flask. Since the flask was completely filled with water at 18.5 °C, we can assume that the volume of the flask is equal to the volume of water it can hold. We can use the density of water, which is approximately 1 g/cm³, to convert the mass of the water-filled flask (375.639 g) to volume.
Volume = Mass / Density = 375.639 g / 1 g/cm³ = 375.639 cm³
Now we need to consider the ideal gas law to relate the volume and mass of the gas at room temperature and pressure. The ideal gas law equation is PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.
Since we know the temperature and pressure, we can rearrange the ideal gas law equation to solve for the number of moles (n):
n = PV / RT
Converting the pressure from mm Hg to atm (atmospheres) and the temperature from Celsius to Kelvin:
P = 760.2 mm Hg / 760 mm Hg/atm = 1 atm
T = 18.5 °C + 273.15 = 291.65 K
Substituting the values into the equation, we get:
\(n = (1 atm) \times (375.639 cm^3) / [(0.0821 L\,atm/mol\,K) \times (291.65 K)]=0.0123 mol\)
Finally, we convert the moles of gas to grams using the molar mass of the gas. Since the identity of the gas is not provided, we cannot determine its molar mass precisely. However, assuming the gas is a volatile organic compound, we can estimate its molar mass to be around 26 g/mol. Therefore, the mass of the gas is:
\(Mass = moles \times molar mass = (0.0123 mol) \times (26 g/mol) = 0.316 g\)
Hence, the mass of the gas that fills the flask is approximately 0.316 grams.
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An airplane travels 640 miles from topeka to houston in 3. 2 hours, going against the wind. The return trip is with the wind, and takes only 2 hours. Find the rate of the airplane with no wind. Find the rate of the wind.
Answers
When an airplane travels 640 miles from Topeka to Houston in 3. 2 hours, going against the wind. The return trip is with the wind and takes only 2 hours. Then the rate of the airplane with no wind is 260 miles/hr, and the rate of the wind is 100 miles/hr
Let Va is the velocity of the airplane
Va is the velocity of the wind
When flying against the wind then
(Va+Vw)*(3.2 hours) = 640
3.2Va + 3.2Vw = 640
3.2Vw = 640 - 3.2Va
Vw = 200 - Va----------------(1)
When flying with the wind:
(Va-V)*(2 hours) = 640km
2Va - 2Vw = 640
Va - Vw = 320 ----------------(2)
Putting the value of VW in equation (2) we get
Va - (200-Va) = 320
2Va = 320 +200
2Va = 520
Va = 260
Putting this value in equation (2)
Vw =Va - 360
Vw = 100
Therefore the rate of the airplane with no wind is 260 miles/hr, and the rate of the wind is 100 miles/hr
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What is one difference between an electromagnetic wave and a mechanical wave?
A.
A mechanical wave can travel through a vacuum. An electromagnetic wave must have a medium to travel through.
B.
An electromagnetic wave can travel through a vacuum. A mechanical wave must have a medium to travel through.
C.
An electromagnetic wave moves parallel to the direction of the wave's travel. A mechanical wave can move only perpendicular to the direction of the wave's travel.
D.
An electromagnetic wave moves perpendicular to the direction of the wave's travel. A mechanical wave can move only parallel to the direction of the wave's travel.
Answers
B.
An electromagnetic wave can travel through a vacuum. A mechanical wave must have a medium to travel through.
The answer is b
valancy of an atom is +2. what does it mean.
Answers
Answer: I hope you find it useful
Explanation: Group 2 elements have two valence electrons. The two valence electrons are easily lost in the formation of chemical bonds. Once the two electrons are lost, the atom then has a full outer shell and is therefore more stable.
so, if an atom has valency 2 , then it means that the atom can combine with 2 other atoms .
A 6kg block starts from rest against a spring with a spring constant of 500N/m that is compressed by a distance of 2m. The ground is frictionless. What will be the velocity of the block leaving the spring?
Answers
The velocity of the block leaving the spring is determined as 18.26 m/s.
Velocity of the block
The velocity of the block leaving the spring is calculated from the principle of conservation of energy.
K.E = Ux
¹/₂mv² = ¹/₂kx²
v² = kx²/m
v² = (500 x 2²)/6
v² = 333.33
v = √333.33
v = 18.26 m/s
Thus, the velocity of the block leaving the spring is determined as 18.26 m/s.
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Calculate the current when a charge of 475C
flows though a cell in 2.5 hours.
Answers
Using the equation Q=IT and rearranging it to find current to become I=Q/T, where:
Q = charge (Coulombs)
I = current (Amperes)
T = time (seconds)
Known values from the question:
Q = 475
T = 2.5 x 3600 (converting the 2.5 hours into seconds as this is the SI unit for time)
T = 9000
Substitute the known values into the equation:
I = Q/T
I = 475/9000
I = 0.05 (rounded to 1 s.f)
an electric current transports of charge in milliseconds. calculate the size of the electric current.
Answers
The size of the electric current is 155 Amperes.
Calculation:
I = Q / t
I = 93.0 C / 0.601 s
I = 155 C/s
I = 155 A
Electric current is the flow of charged particles such as electrons and ions, that travel through a conductor or space. It is measured as the net flux of charge to the surface or control volume. Electricity starts with atoms.
Atoms are made up of protons neutrons and electrons. Electricity is generated when electrons are moved from atom to atom by an external force. The flow of electrons is called current. Current refers to the flow of current in an electronic circuit and the amount of current that flows through the circuit.
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A ball dropped from the top of a building is an example of
A. Constant speed
B. Instantaneous speed
C. Combining displacements
D. Free fall
Answers
How is mass related to potential energy?
Answers
Answer:
Potential energy is the stored energy of position possessed by an object. In the above equation, m represents the mass of the object, h represents the height of the object and g represents the gravitational field strength (9.8 N/kg on Earth) - sometimes referred to as the acceleration of gravity.
Explanation:
You dip your finger repeatedly into water and make waves. If you dip your finger more frequently, the wavelength of the waves (a) shortens, (b) lengthens, (c) stays thesame.
Answers
If you dip your finger more frequently into the water, the wavelength of the waves will shorten.
Hence, the correct option is A.
If you dip your finger more frequently into the water, the wavelength of the waves will shorten. The wavelength of a wave is the distance between two consecutive crests or troughs.
When you dip your finger more frequently, you are increasing the frequency of the waves. According to the wave equation (v = fλ), where v is the velocity of the wave, f is the frequency, and λ is the wavelength, if the frequency increases while the velocity remains constant, the wavelength must decrease to maintain the equation.
Therefore, If you dip your finger more frequently into the water, the wavelength of the waves will shorten.
Hence, the correct option is A.
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Which of the following is a true statement?
Answers
A student pushes a chair into a desk. If the student's push is the action force, then what is the reaction force in this example of Newton's third law?
A. the force that the chair exerts on the desk after it is pushed in
B. the force of friction acting on the chair
C. the force of gravity acting on the chair
D. the force from the chair on the student
Answers
Answer:
Ans : C
Explanation:
C. The force of gravity acting on the chair
Answer:
D. the force from the chair on the student
Explanation:
Newton's third law: If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A.
This law represents a certain symmetry in nature: forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself.
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a container has the mass of 125g when a liquid is added the mass becomes 163g what is the mass of the liquid
Answers
The speed of red light is slower in air and water than in a vacuum. The frequency, however, does not change when red light enters water. Does the wavelength change
Answers
Given that the speed of red light is slower in air and water than in a vacuum, but its frequency does not change ;
The wavelength changes (decreases) as the light enters water.
Characteristics of light wave in water and airWhen light such as red light travels from air into water, the speed of the light will change, but the frequency of the light traveling through vacuum, water and air will remain constant. But as light travels from air into water, the wavelength will decrease.
Hence, we can conclude that the wavelength changes (decreases) as the light enters water.
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Suggest two possible errors in finding the mass of the ruler
Answers
(2) imperfections in the techniques used to make the measurement
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HELPPP. A ball of mass 0.35kg rolls on a smooth surface and hits another object at rest and of mass 7kg. The second object gets an acceleration of 1.5m/s2. What acceleration does the ball get? Use newtons third law.
Answers
Answer:
-30 m/s²
Explanation:
Newton's third law states that: for every action, there is an equal and opposite reaction.
Now, we are given;
Mass of ball: m_b = 0.35kg
Mass of second object: m_s = 7 kg
Acceleration of second object: a_s = 1.5 m/s²
From Newton's third law, we can say that:
-F_b = F_s
Thus:
-(0.35 × a_b) = 7 × 1.5
a_b = -(7 × 1.5)/0.35
a_b = -30 m/s²