a transverse wave on a thin rope has a wavelength of 58\;\mathrm{cm}58cm, an amplitude of 6.4\;\mathrm{cm}6.4cm, and a period of 7.3\;\mathrm{s}7.3s. what is the propagation velocity of this wave?
Answers
The size of a wave is equivalent to half its top to valley distance, which is the solution to the question.
How can one measure wavelength?A wave sensor's length, which corresponds to the distance between two identical locations (next crests) in successive cycles, determines whether it is sent through space or via a wire. In wireless systems, this length is often specified in meters (m), centimeters (cm), or millimeter (mm) (mm). The duration can be calculated as the distance between two contiguous wave front peaks or waves propagating compressions. It is often represented in meters. Such waves have a relationship between their energy and wavelength. Waves with a shorter wavelength have had more energy than waves with a longer wavelength of the same intensity.A wave is generated as a result of oscillations which creates disturbances in the medium and these disturbances termed as waves propagates or travels from one point to another.Waves can be classifies as:Mechanical waves which requires material medium for their propagationElectromagnetic waves which do not require any material medium to propagate.A wave travels at a specific velocity depending on the type of the medium in which it propagates.Briefing:
A = 1/2* distance
A = 1/2* 5.8
A = 2.9m
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Related Questions
You are in a car moving forward at 12 m/s. You throw a ball in the direction the car is moving. From your point of view, what does the ball do? what does the ball do from someone standing on the side of the roads view?
Answers
Answer: it goes the same speed as the car
Explanation:
About how many days in the moon’s cycle is it waxing?.
Answers
Answer: 29.5 days
The waxing moon phase comprises three separate moon phases: the Waxing Crescent, First Quarter, and the Waxing Gibbous.
Answer:
its called a lunar cycle, and it lasts about 29 1/2 days.
Newton's law of cooling states that the rate at which a body changes temperature is proportional to the difference between its temperature and that of the surrounding medium. If a body is in air of temperature
25
∘
and the body cools from
95
∘
to
85
∘
in
30
minutes, find the temperature of the body after
60
minutes. (Round to nearest degree.)
Answers
The temperature of force the body after 60 minutes is 71 degrees. Let the temperature of the body after 60 minutes be T.
Since the temperature of the surrounding medium is 25 degrees Celsius and the temperature of the body cools from 95 to 85 in 30 minutes, we can find k using the following formula;dT/dt = k(T - 25)Here, dT/dt is the rate at which the body's temperature changes. It's equal to (85 - 95)/30 = -1/3Since the temperature difference is decreasing with time (body cools down), the negative sign indicates this change.
We have;dT/dt = k(T - 25)-1/3 = k(95 - 25)k = -1/70Substituting the value of k in the differential equation above, we get;dT/dt = (-1/70) (T - 25)Solving the differential equation gives the following equation:T = 25 + 60e^(-t/70)Substituting the value of t = 60 minutes (1 hour) into the equation above gives;T = 25 + 60e^(-1)T = 71 degrees Celsius (rounded to the nearest degree).
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Which is a difference between the focus of a nuclear engineer and the job of a nuclear chemist?
O Nuclear engineers are concerned with the design, construction, and operation of nuclear reactors; nuclear
chemists study nuclear reactions, radioactive elements, and nuclear power.
O Nuclear chemists are concerned with the design, construction, and operation of nuclear reactors, nuclear
engineers study nuclear reactions, radioactive elements, and nuclear power
O Nuclear engineers are concerned with the production and use of radioactive sources, nuclear chemists study the
absorption of radiation.
O Nuclear chemists are concerned with the production and use of radioactive sources; nuclear engineers study the
absorption of radiation.
Answers
Answer: A.
Nuclear engineers are concerned with the design, construction, and operation of nuclear reactors; nuclear
chemists study nuclear reactions, radioactive elements, and nuclear power.
Explanation:
Engineers are always concerned about the design, research, maintenance and construction e.t.c
While a chemist also do research and deal with chemical reactions.
To differentiate the difference between the focus of a nuclear engineer and the job of a nuclear chemist, option A is the best answer for this which says:
Nuclear engineers are concerned with the design, construction, and operation of nuclear reactors; nuclear
chemists study nuclear reactions, radioactive elements, and nuclear power.
Answer:
Nuclear engineers are concerned with the design, construction, and operation of nuclear reactors; nuclear chemists study nuclear reactions, radioactive elements, and nuclear power.
Explanation: got it right on test
If a car has a mass of 4000 kg and the force applied to it is 10000 N. What is its acceleration?
Answers
Answer:
2.5 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
\(a = \frac{f}{m} \\ \)
f is the force
m is the mass
From the question we have
\(a = \frac{10000}{4000} = 2.5 \\ \)
We have the final answer as
2.5 m/s²Hope this helps you
How high do you need to fall for it to be very very very fatal ???
Answers
Answer:
Jump from tallest building (Burj Khalifa) without any protection kit.
For Valentine’s Day, Sally received a helium-filled balloon at a party. On returning home she accidentally left the balloon in the car. Later she went to get the balloon and found it was partially deflated. After being in the house for an hour she noticed it was fully inflated again. Explain why this happened.
Answers
Answer:
If the temperature of the air in the balloon is less than the temperature of the air surrounding the balloon then the balloon will appear slightly deflated because of the difference in temperature.
As the temperature of the air in the balloon reaches the surrounding air temperature, then the balloon will appear to be fully inflated because the temperature of the air in the balloon is the same as the surrounding air temperature.
At which position, A or B, is the potential energy of the swing the greatest? As the swing moves from point B to point A, which form of energy is increasing, kinetic or potential?
Answers
Answer:
a) Ua> Ub, b) Em = K + U
Explanation:
A swing is an oscillatory system, which goes from the highest point of the trajectory to the lowest point and then continues to the highest point on the other side, with a curved trajectory.
Suppose point A is the highest point and point A the lowest point, as the potential energy is given by the formula
U = m g h
if we define a reference system where the lowest point corresponds to y = or at this point the power energy is zero, therefore
Ua> Ub
in this movement the mechanical or total energy of the system remains constant, therefore it can be written
Em = K + U
therefore at the highest point the mechanical energy is only potential and at the lowest point it is only kinetic and at the intermediate points it has a part of each, but the value of the mechanical energy is constant and does not change.
Answer:
At which position, A or B, is the potential energy of the swing the greatest?
b
As the swing moves from point B to point A, which form of energy is increasing, kinetic or potential?
kinetic
Explanation:
A motor used 120. watts of power to raise a 15-newton object in 5.0 seconds. Through what vertical distance was the object raised
Answers
The vertical distance as the object was raised is 40 m.
What is vertical distance?
This is the distance between two vertical positions in space. Vertical distance can also be called height.
To calculate the vertical distance at which the object was raised, we use the formula below.
Formula:
P = Fd/t.................... Equation 1Where:
P = Power of the motorF = Forced = vertical distancet = time.
Make d the subject of the equation.
d = Pt/F............. Equation 2
From the question,
Given:
P = 120 wattF = 15 Newtont = 5.0 secondsSubstitute these values into equation 2
d = (120)(5)/15d = 40 m.
Hence, the vertical distance as the object was raised is 40 m.
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a jet can travel at 400 minutes per second how far will it travel at this speed in 3 seconds
Answers
A jet can travel 1200 minutes for 3 seconds
Answer:
1200
Explanation:
18.Suppose the boy first runs a distance of 100 metres in 50 seconds in going from his home to the shop in the East direction, and then runs a distance of 100 metres again. in 50 seconds in the reverse direction from the shop to reach back home from where he started (see Figure).
(i) Find the speed of the boy.
(ii) Find the Velocity of the boy
(iii) A boy is sitting on a merry-go-round which is moving with a constant speed of 10m/s. This means that the boy is :
(iv) In which of the following cases of motion, the distance moved and the magnitude of displacement are equal ?
ANSWER IT ASAP!!!
Answers
Suppose the boy first runs a distance of 100 metres in 50 seconds in going from his home to the shop in the East direction, and then runs a distance of 100 metres again. in 50 seconds in the reverse direction from the shop to reach back home from where he started (see Figure).
then The speed of the Boy is 2 m/s
Velocity of the boy is 0 m/s
The speed is given as total distance travelled divided by total time.
Speed = Distance/Time = 200/100 = 2 m/s
The velocity is displacement over time,
velocity = displacement/time
velocity = 0/100 = 0 m/s
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The first Tacoma Narrows Bridge in Washington crossed over a strait in Puget Sound. At the time the suspension bridge was built, construction workers noticed that it moved up and down in the wind. Measures to stop the bridge's movement were ineffective, but the bridge was opened to the public on July 1, 1940. The bridge collapsed on November 7, 1940. Luckily, no people were seriously injured. Determine which technological design criteria the Tacoma Narrows Bridge did and did not meet. Explain your answer.
Answers
Answer:
Follows are the solution to this question:
Explanation:
When the Tacoma Narrows Bridge was built, it may not have met the technical design requirements and when it didn't solve the problem for long so, the bridge will be unsustainable and fell. or we can say that Due to an aeroelastic flutter caused by high winds, the bridge collapsed. The bridge oscillated rapidly and ultimately dropped. Its collapse of the bridge has lasting impacts on science and technology.
Answer:
When the Tacoma Narrows Bridge was built, it may not have met the technical design requirements and when it didn't solve the problem for long so, the bridge will be unsustainable and fell. or we can say that Due to an aeroelastic flutter caused by high winds, the bridge collapsed. The bridge oscillated rapidly and ultimately dropped. Its collapse of the bridge has lasting impacts on science and technology.
A waiter is carrying a tray above his head and walking at a constant velocity. If he applies a force of 5.0 newtons on the tray and covers a distance of 10.0 meters, how much work is being done?
Answers
Answer:
0 J
Explanation:
Work is the dot product of force and displacement. In other words, it is the force times the distance traveled in the direction of the force.
W = Fd cos θ
In this case, the force is vertical and the displacement is horizontal. So the angle between them is θ = 90°. The work done is:
W = (5.0 N) (10.0 m) cos(90°)
W = 0 J
A cyclist is coasting at 12 m/s when she comes to a muddy stretch with an effective coefficient of friction of 0.60. Will the cyclist be able to get out of the muddy stretch without having to pedal if it lasts 10 meters
Answers
The cyclist will make it since the distance traveled by the cyclist is greater than the length of the muddy stretch.
The given parameters;
speed of the cyclist, u = 12 m/scoefficient of friction, μ = 0.6length of the muddy stretch, L = 10 mThe effective acceleration of the cyclist at the given coefficient of friction is calculated as follows;
\(a = \ \mu g\\\\a = 0.6 \times 9.8\\\\a = 5.88 \ m/s^2\)
The distance traveled by the cyclist at the give speed and acceleration is calculated as;
\(v^2 = u^2 + 2as\\\\12^2 = 0 + 2(5.88)s \\\\ 11.76 s = 144\\\\ s = \frac{144}{11.76} \\\\a = 12.24 \ m\)
Thus, we can conclude that the cyclist will make it since the distance traveled by the cyclist is greater than the length of the muddy stretch.
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A box has a mass of 75 g. It has a length of 2.0 cm, a width of 2.0 cm and a height of 3.0 cm. What is the density?
Answers
Answer:
6.25 g/cm³
Explanation:
2 cm * 2 cm * 3 cm = 12 cm³ (volume)
75 g / 12 cm³ = 6.25 g/cm³
Dashun Mack: Attempt
Question 4 (1 point)
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A baseball is seen to pass upward by a window 29 m above the street with a vertical
speed of 11 m/s. The ball was thrown from the street. How long (in seconds) after it
was thrown did it pass the window?
Your Answer:
Answer
4
Answers
The time elapsed when the ball reaches the window is 1.55s
As per the question:
Final velocity, v = 11 m/s
Height, h = 29m
Acceleration, a = g = -9.8 m/s
From the third equation of motion:
v² = u² +2as
u² = v² - 2as
u² = (11)² - 2 × (-9.8) × (29)
u² = 689.4
u = √689.4
u = 26.25 m/s
Now, from the first equation of motion:
v = u + at
\(t=\frac{v-u}{-g}\)
\(t = \frac{11 -26.25}{-9.8}\)
t = 1.55 s
Therefore, the time elapsed when the ball reaches the window is 1.55s.
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it is believed that when electrons spin on their axes as they orbit the nucleus of the atom, the spinning motion causes each electron to become .
Answers
Spin is an intrinsic property of electron. This is useful to find comprehensive details about the electron in atom, such as, energy perturbation, angular momentum etc.
What is spin quantum number?
The term "spin quantum number" refers to the fourth quantum number that is presented to characterize the orientation of the electron spin (rotation) in space. It can move either clockwise or counterclockwise.
Quantum numbers provide comprehensive details about the electron in atom including its energy, position, size, shape, orientation, and spin direction. The spin quantum number describes the spin's orientation.An atom's electron spins about its own axis in addition to moving around the nucleus. This number provides details regarding the electron's direction of spin in each given orbital.Like rest mass and charge, the spin angular momentum is an intrinsic feature.An electron's magnitude spin quantum number cannot be altered.The spin can be in the orientation 2s+1=2.Learn more about spin here:
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a) A cell of dry air is moved vertically from its original position under adiabatic conditions. Depending on the temperature profile of the surrounding atmosphere, this gas cell can keep on moving in the same direction, or it may come back to its original position. Considering the temperature profile of the atmosphere, change of the air cell temperature as it moves up and down in the surrounding atmosphere, as well as relative densities of the air cell and atmosphere, explain why and when the atmosphere is considered to be convectively stable and convectively unstable. In answering this question, use diagrams of temperature change with altitude. (13 marks) b) Explain why the adiabatic lapse rate of dry air is different from the adiabatic lapse rate of wet saturated air. Show them both in a diagram. (5 marks) c) Wet unsaturated air rises from the ocean surface. The ambient lapse rate is higher than the adiabatic lapse rate for dry air. There is a temperature inversion layer at higher altitudes. Show in a schematic diagram how the temperature of the wet air changes with altitude, in comparison with the ambient temperature. Explain at what altitudes the cumulus clouds are formed and why. (7 marks)
Answers
The question addresses the stability of the atmosphere and the factors that determine convective stability or instability. It also explains the difference between the adiabatic lapse rate of dry air and wet saturated air.
a) The stability of the atmosphere is determined by the temperature profile and relative densities of the air cell and atmosphere. If the temperature of the surrounding atmosphere decreases with altitude at a rate greater than the adiabatic lapse rate of the air cell, the atmosphere is considered convectively stable.
In this case, the air cell will return to its original position. Conversely, if the temperature of the surrounding atmosphere decreases slower than the adiabatic lapse rate of the air cell, the atmosphere is convectively unstable. The air cell will continue moving in the same direction.
b) The adiabatic lapse rate refers to the rate at which temperature decreases with altitude for a parcel of air lifted or descending adiabatically (without exchanging heat with its surroundings). The adiabatic lapse rate of dry air is higher (around \(9.8^0C\) per kilometer) compared to the adiabatic lapse rate of wet saturated air (around 5°C per kilometer).
This difference arises because when water vapor condenses during the ascent of saturated air, latent heat is released, reducing the rate of temperature decrease. A diagram can illustrate the difference between the two lapse rates, showcasing their respective slopes.
c) When wet unsaturated air rises from the ocean surface, its temperature decreases at a rate equal to the dry adiabatic lapse rate. However, if the ambient lapse rate (temperature decrease with altitude) is higher than the adiabatic lapse rate for dry air, a temperature inversion layer forms at higher altitudes.
In this inversion layer, the temperature increases with altitude instead of decreasing. A schematic diagram can depict the temperature changes of the wet air in comparison to the ambient temperature, showing the inversion layer.
Cumulus clouds form at the altitude where the rising moist air reaches the level of the temperature inversion layer. These clouds are formed due to the condensation of water vapor as the air parcel cools to its dew point temperature.
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A body of mass 3 kg and volume 4 x 10^m' is hung from a balance
graduated in Newton. What is the reading of the balance when the
body is
a. In air;
b. Fully immersed in water
immersed in water.
Answers
Answer:
it's b I guess not sure
Explanation:
The reading of the balance for a body with mass 3kg and volume 4 × 10⁻⁴ in air and when fully immersed in water are 29.4N and 25.5N, respectively.
What is weight?
The weight of an object is the force which is acting on the object due to the influence of gravity. Weight is a vector quantity because it has both the magnitude and direction. The gravitational force acts on the object.
The reading of the balance when the body is in air, W = mg = (3) × (9.8) = 29.4 N
The reading of the balance when the body is fully immersed in water is:
F = mg − ρgV = (3) × (9.8) − (1000) × (9.8) × (0.0004) = 25.5 N
Therefore, the reading of the balance in the given conditions are 29.4N and 25.5N.
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7. A sprinter accelerates from rest to a velocity of 12 m/s in the first 6
seconds of the 100-meter dash.
What is the acceleration in the first 6 seconds?
b. How far does the sprinter travel during the first 6 seconds?
Answers
Answer: a) 36 m/s
B) 64 m
Explanation:
A) d= ½ (Vi+Vf)t
d= ½ (0+12)6
d= 36 m/s
B) 100 – 36 = 64
An engineer is designing a runway for an airport. Several planes will use the runway and the
engineer must design it so that it is long enough for the largest planes to become airborne before the
runway ends. If the largest plane accelerates at 3.30 m/st and has a takeoff speed of 88.0 m/s, then
what is the minimum allowed length for the runway?
Answers
The minimum allowed length for the runway is 1170m.
a=3.30m/s2 is the acceleration of the plane
v=88.0 m/s is the final velocity of the plane
u=0m /s is the initial velocity of the plane
The acceleration of the object is the slope of the v-t graph, therefore,
Slope=Change in y component / Change in the x component
a = u- v / T f - T i
T f - T i = v/a
T f - T i = 88/3.3
T f - T i = 26.67 s
The displacement,
d=1/2 b h
d=1/2(T f - T i ) * v
d = 1/2 * 26.67 s * 88.0 m / s
d = 1173.33
= 1170m nearest three significant figures
Hence, the minimum allowed length for the runway is 1170m answers.
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question 2.01 homeworkunanswered energy in should always be equal to energy out. select an answer and submit. for keyboard navigation, use the up/down arrow keys to select an answer. a true b false
Answers
The statement that "energy in should always be equal to energy out" is incorrect. In many systems, energy transformations and losses can occur, leading to a difference between energy input and output. Therefore, the correct answer is b. False.
The statement "energy in should always be equal to energy out" is not always true. While energy conservation is a fundamental principle, it does not guarantee that the energy input to a system will be equal to the energy output in all cases.
In real-world systems, energy transformations and losses can occur due to various factors such as inefficiencies, friction, heat dissipation, or other forms of energy dissipation. These processes can result in a difference between the energy input and output.
For example, consider a simple mechanical system like a car engine. When fuel is burned, chemical energy is converted into mechanical energy to propel the car. However, not all of the energy from the fuel is converted into useful work. Some energy is lost as heat due to friction, air resistance, and other factors. As a result, the energy output of the engine is less than the energy input from the fuel.
Similarly, in electrical systems, energy losses can occur in the form of resistance in wires, heat dissipation in components, or other inefficiencies. These losses can lead to a difference between the energy input and output.
Therefore, while energy conservation is a fundamental principle, the statement that "energy in should always be equal to energy out" is not universally true. In real-world systems, energy transformations and losses can result in a discrepancy between the energy input and output.
The correct answer is b. False.
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3) A block with an unknown mass rests on a rough table. Attached to the mass is a
string which is attached to a 12 kg mass that hangs over the edge of the table via a
pulley. The coefficient of friction is 0.35. When released from rest, the system
reaches a speed of 8 m/s after traveling a distance of 6 m.
a. Calculate the acceleration of the system.
b. What equation can you use to represent the force of friction acting on the
unknown mass.
c. Write out Newton's Second Law and solve for the unknown mass.
Answers
a. The acceleration of the system is 0.21 m/s^{2}
b. The equation of the force of friction is -
tension force - force of friction = unknown mass x its acceleration and force of friction is equal to product of coefficient of friction and normal force acting on unknown mass .
c. Newton's second law of motion applies when there are unbalanced forces acting on an object. According to the second law, the mass and the net force acting on the object both affect how quickly an object is accelerating . An object's acceleration is directly proportional to the net force applied and inversely proportional to the object's mass. An object's acceleration increases as the amount of force exerted on it does. A decreasing acceleration is caused by an increase in an object's mass.
The unknown mass is nearly equal to 30 kg .
What is acceleration ?
the rate at which the speed and direction of a moving object vary over time is termed as acceleration . An object going straight ahead when it accelerates or decelerates, is said accelerated. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.
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Which condition is a result of a hypereffective heart in a well-conditioned athlete?
Answers
The result of a hypereffective heart in a well-conditioned athlete is an increased stroke volume, leading to a higher cardiac output during physical activity.
A hypereffective heart refers to an exceptionally efficient and strong heart in a well-conditioned athlete. This condition is a physiological adaptation that occurs as a result of regular exercise and cardiovascular training.
In a well-conditioned athlete, the heart undergoes changes that enable it to pump blood more effectively. One significant adaptation is an increase in stroke volume, which is the amount of blood ejected by the heart with each contraction. A hypereffective heart can pump a larger volume of blood per beat, allowing for more oxygen and nutrients to be delivered to the working muscles.
The increased stroke volume leads to a higher cardiac output, which is the total amount of blood pumped by the heart per minute. The hypereffective heart, combined with a lower resting heart rate, enables the athlete to have a higher maximal oxygen uptake (VO2 max) and enhanced exercise performance. This adaptation allows for improved oxygen delivery and utilization during physical activity, leading to increased endurance and overall cardiovascular fitness in well-conditioned athletes.
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The equation for distance is d = st . If a car has a speed of 20 m/s , how long will it take to go 155
Answers
7.75
Explanation
D=st
155=20*t
155=20t
155/20t
T=31/4
T=7.75
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In four pulley system a load of 800n is overcome .If MA is 3 . Calculate the effort applied VR and efficiency
Answers
Answer:
effort = 266.66N
VR and efficiency are 8 and 37.5% respectively.
Explanation:
Given data: four pulley system, load = 800 N, Mechanical advantage MA = 3
we have to calculate both velocity ratio and efficiency
If there are n movable pulleys connected to a fixed pulley then
VR = \(2^{n}\)
In the given question there are 4 pulleys in which one must be fixed and 3 movable
Therefore, VR = 2^3 = 8
Also, MA = Load/ effort
⇒ 3= 800/effort
⇒ effort = 266.66N
Also we know that
Efficiency = MA/VR
⇒Efficiency = 3/8 = 37.5%
Therefore, VR and efficiency are 8 and 37.5% respectively.
which element has 5 valence electrons and 4 shells
Answers
Answer:
Arsenic
Explanation:
Arsenic is in group 5 and period 4. Group numbers tell us the number of valence electron and period number tells us the number of shells in an element.
Define power and discuss how to determine power worth 4 points
Answers
Power is, summarized, how fast something is done using energy. More specifically, power is the amount of energy transferred or converted per unit time.
To determine power, you use the following formula:
\(P=\frac{W}{Δt}\)
(formatting is messed up, the denominator is Δt)
P - power
W - work
Δt - elapsed time
Hope this helps, have a wonderful day :D
The external stimulus (what causes the stress) NEED HELP ASAP
Answers
Answer:
Some examples of external stressors include:
Major life changes. These changes can be positive, such as a new marriage, a planned pregnancy, a promotion or a new house. ...
Environment. The input from the world around us can be a source of stress. ...
Unpredictable events.
Workplace.
Social.
Explanation:
A particle of charge 5 × 10–2 C is taken from a point at a potential of 50V to another point at a potential of 250V. Calculate the work done.
Answers
Answer:
10 joules
Explanation:
Voltage= U(Potential energy)/qo
Q0 is the test charge
so,
250-50=w/5*10^-2
since potential energy = work done
w=10 joules