Answer:
Infrasonic.
Explanation:
Given the following data;
Speed = 345 m/s
Wavelength = 500 meters
To find the frequency of the sound wave;
Speed = wavelength * frequency
Frequency = speed/wavelength
Frequency = 345/500
Frequency = 0.69 Hz
Therefore, the sound wave is infrasonic.
Note: Frequency of infrasonic sound = below 20 Hertz.
Frequency of sonic sound = 20 Hz to 20,000 Hertz.
Frequency of ultrasonic sound = above 20,000 Hertz.
what type of force can never do any work on an object
Hay muchos ejemplos importantes de fuerzas que no funcionan porque actúan perpendiculares al movimiento. Para el movimiento circular, la fuerza centrípeta siempre actúa en ángulo recto con el movimiento. Cambia la dirección del movimiento, pero no funciona en el objeto.
If the Earth's sideways velocity could be suddenly stopped to zero, how would Earth
move?
O It would fall directly into the sun
It would continue to orbit as before
O It would fly off into space
O More information is needed to answer this question
Answer:If the Earth stopped spinning suddenly, the atmosphere would still be in motion with the Earth's original 1100 mile per hour rotation speed at the equator. All of the land masses would be scoured clean of anything not attached to bedrock.
Explanation:
PLS HELP DUE IN 20 MINS!!! True or false: You can make a pulse travel at a faster speed without changing the shape or size of the pulse.
Answer:
False
Explanation:
A Larger pulse with more energy means that the wave has a large amplitude. As in the given question, both the waves are travelling in the same medium, hence their speeds will remain the same and therefore the larger pulse will not overtake the smaller pulse. Remember the amplitude of a wave does not affect the speed at which the wave travels.
Find the magnitude of the sum of a 10m displacement and a 5 -m displacement when the angle between them is 45
Answer:
The magnitude of the resultant of the two vectors is 7.37 m.
Explanation:
let the first vector = a = 10 m
let the second vector = b = 5 m
angle between the two vectors, θ = 45⁰
The magnitude of the resultant of the two vectors is calculated as;
[tex]R^2 = a^2 + b^2 -2ab \times cos(\theta)\\\\R^2 = 10^2 + 5^2 - [2\times 10 \times 5 \times cos(45)]\\\\R^2 = 125 - [100 \times 0.7071]\\\\R^2 = 125 -70.71\\\\R^2 = 54.29 \\\\R= \sqrt{54.29} \\\\R = 7.37 \ m[/tex]
Therefore, the magnitude of the resultant of the two vectors is 7.37 m.
which fuel is considered as a clean fuel for vehicles?
Answer:
Biodiesel or biogas vehicles are seen as an element on the path towards energy independence from fossil fuels and relief from unstable oil prices. ... CIVITAS cities test for example the use of biodiesel, biogas, compressed natural gas (CNG) and hybrid vehicles.
Explanation:
PLS HELP DUE IN 30 MINS!!! True or false: A large-amplitude pulse travels at a faster speed than a small-amplitude pulse. Explain your answer.
Answer:
False
Explanation:
Larger pulse with more energy means that the wave has large amplitude. As in the given question, both the waves are travelling in the same medium, hence their speeds will remain same and therefore the larger pulse will not overtake the smaller pulse. Remember the amplitude of a wave does not affect the speed at which the wave travels
Answer:
False
Explanation:
The amplitude of a wave does not affect the speed at which the wave travels. The speed of a wave is only altered by alterations in the properties of the medium through which it travels.
4. A woman releases one egg every month for 37 years. Calculate how many
she releases in total. Show your working.
so, 444 eggs would have been released in 37yrs
If a woman releases one egg every month for 37 years, then she releases 444 eggs.
What is a year?A year is a unit of time that is commonly used to measure the period of time it takes for the Earth to make one revolution around the Sun.
The time it takes for the Earth to complete one orbit around the Sun is approximately 365.24 days, which is why a year is usually defined as 365 days, with an extra day added every four years (in what's called a leap year) to account for the fractional part of the year. This is known as the Gregorian calendar, which is the most widely used calendar system in the world.
A year is also commonly used to refer to the period of time it takes for an event or cycle to repeat, such as the school year, fiscal year, or a company's financial year.
There are 12 months in a year, and they are:
January
February
March
April
May
June
July
August
September
October
November
December
Each month has either 30 or 31 days, except for February which has 28 days (or 29 days in a leap year). The number of days in a month determines the number of days in a year, which is why a year typically has either 365 or 366 days, depending on whether or not it is a leap year.
Here in the question,
37 years is equivalent to 37 x 12 = 444 months (since there are 12 months in a year).
To calculate this, we simply multiply the number of eggs released each month (which is one) by the total number of months:
Number of eggs released = 1 egg/month x 444 months
Number of eggs released = 444 eggs
Therefore, over 37 years, a woman releases 444 eggs.
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What does DARE stand for in balanced and unbalanced forces
Answer:
Balanced Forces
But what exactly is meant by the phrase unbalanced force? What is an unbalanced force? In pursuit of an answer, we will first consider a physics book at rest on a tabletop. There are two forces acting upon the book. One force - the Earth's gravitational pull - exerts a downward force. The other force - the push of the table on the book (sometimes referred to as a normal force) - pushes upward on the book.
Since these two forces are of equal magnitude and in opposite directions, they balance each other. The book is said to be at equilibrium. There is no unbalanced force acting upon the book and thus the book maintains its state of motion. When all the forces acting upon an object balance each other, the object will be at equilibrium; it will not accelerate.
Consider another example involving balanced forces - a person standing on the floor. There are two forces acting upon the person. The force of gravity exerts a downward force. The floor exerts an upward force.
Since these two forces are of equal magnitude and in opposite directions, they balance each other. The person is at equilibrium. There is no unbalanced force acting upon the person and thus the person maintains its state of motion.
Unbalanced Forces
Now consider a book sliding from left to right across a tabletop. Sometime in the prior history of the book, it may have been given a shove and set in motion from a rest position. Or perhaps it acquired its motion by sliding down an incline from an elevated position. Whatever the case, our focus is not upon the history of the book but rather upon the current situation of a book sliding to the right across a tabletop. The book is in motion and at the moment there is no one pushing it to the right. (Remember: a force is not needed to keep a moving object moving to the right.) The forces acting upon the book are shown below.
The force of gravity pulling downward and the force of the table pushing upwards on the book are of equal magnitude and opposite directions. These two forces balance each other. Yet there is no force present to balance the force of friction. As the book moves to the right, friction acts to the left to slow the book down. There is an unbalanced force; and as such, the book changes its state of motion. The book is not at equilibrium and subsequently accelerates. Unbalanced forces cause accelerations. In this case, the unbalanced force is directed opposite the book's motion and will cause it to slow down.
To determine if the forces acting upon an object are balanced or unbalanced, an analysis must first be conducted to determine what forces are acting upon the object and in what direction. If two individual forces are of equal magnitude and opposite direction, then the forces are said to be balanced. An object is said to be acted upon by an unbalanced force only when there is an individual force that is not being balanced by a force of equal magnitude and in the opposite direction.
initially the angle 0 is much less than the critical angle for this light in water the laser moves and 0 gradually increases untill it is much greater than the critical angle describe for different angle of the laser what happens to the light beam after it hits the surface
Answer:
low angle n₁ sin θ₁ = n₂ sin θ₂
critical angle sin θ₁ = [tex]\frac{n2}{n1}[/tex] θ₁ = θ_{reflected}
Explanation:
When the light ray touches the two surfaces of the refraction according to the Law of Refraction
n₁ sin θ₁ = n₂ sin θ₂
In this problem the ray goes from the material with the highest index to the lowest index, in the middle of the incident it has the subscript 1
sin θ₂ = [tex]\frac{n_1}{n_2}[/tex] sin θ₂
What
n₁/n₂> 1
in refracted ray it moves away from normal.
As the incident angle increases, a value is reached where sin θ₂ = 1, for this angle
sin θ₁ = [tex]\frac{n2}{n1}[/tex]
This angle is called critical and as the sine function cannot have values greater than 1, the ray is reflected, therefore it must comply with the law of reflection where the incident angle is equal to the reflected angle.
Why did Kenyatta want to distance himself from the Mau Mau? Check all that apply.
They had no desire for independence.
The British were determined to crush the rebellion.
They were criminals and made achieving independence more difficult.
They were led by his political rivals.
They were members of the Kikuyu.
Answer:
The British were determined to crush the rebellion.
They were criminals and made achieving independence more difficult.
Explanation:
Mau-mau were rebellions and wanted to push out British and other Europeans out of Kenya. Mau mau were also the members of the Kikuyu and were making independence more difficult, due to their rebellion attitude. They were a secret society of Kikuyu.
2) The British were determined to crush the rebellion.
3) They were criminals and made achieving independence more difficult.
After British victory in World War II, Kenyatta received a request to return to Kenya in September 1946, sailing back that month. He decided not to bring Edna—who was pregnant with a second child —with him, aware that if they joined him in Kenya their lives would be made very difficult by the colony's racial laws. On his arrival in Mombasa, Kenyatta was greeted by his first wife, Grace Wahu and their children. He built a bungalow at Gatundu, near to where he was born, and began farming his 32-acre estate.
(a) The British were determined to crush the rebellion.
(b) They were criminals and made achieving independence more difficult.
What is the desire of Kenyatta?Mau-mau were rebellions and wanted to push out British and other Europeans out of Kenya. Mau mau were also the members of the Kikuyu and were making independence more difficult, due to their rebellion attitude. They were a secret society of Kikuyu.
2) The British were determined to crush the rebellion.
3) They were criminals and made achieving independence more difficult.
After British victory in World War II, Kenyatta received a request to return to Kenya in September 1946, sailing back that month. He decided not to bring Edna—who was pregnant with a second child —with him, aware that if they joined him in Kenya their lives would be made very difficult by the colony's racial laws.
On his arrival in Mombasa, Kenyatta was greeted by his first wife, Grace Wahu and their children. He built a bungalow at Gatun, near to where he was born, and began farming his 32-acre estate.
Thus the British were determined to crush the rebellion.They were criminals and made achieving independence more difficult.
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In what way could a random mutation provide an organism with an advantage? With a example please
Answer:
They are called beneficial mutations. They lead to new versions of proteins that help organisms adapt to changes in their environment. Beneficial mutations are essential for evolution to occur. They increase an organism's changes of surviving or reproducing, so they are likely to become more common over time.
Explanation:
what is the SI unit for moment
Answer:
Newton Metre
Explanation:
When a tennis player practices by
hitting a ball against a wall, which of Newton's
laws of motion is the player making use of?
Answer:
2nd bscause there is a reaction
A force of 52N acts upon a 4kg block sitting on the ground. Calculate the acceleration of the object.
Answer:
[tex]a=13\ m/s^2[/tex]
Explanation:
Given that,
Force, F = 52 N
Mass of the block, m = 4 kg
We need to find the acceleration of the object. We know that,
F = ma
Put the values,
[tex]a=\dfrac{F}{m}\\\\a=\dfrac{52}{4}\\\\a=13\ m/s^2[/tex]
So, the acceleration of the object is equal to [tex]13\ m/s^2[/tex].
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer this correctly!!!! (40pts)
Answer:
Newton's second law: F=ma.
Force = mass x acceleration
This basically means, that the more massive something is, and the faster it is going, the more force the object will have.
So, the factors that can be used to find acceleration are:
F=ma
a=F/m
So, we see that the correct answer is A, mass and force.
Let me know if this helps!
formula for work done
Answer:
Work = Force × Distance
-----------------------------------
hope this helps :)
What component in a circuit does this symbol represent?
A. ammeter
B. voltmeter
C. switch
D. AC power source
E. DC power source
Hii :) Im not sure but I think the answer is E. DC power source.
The symbol represents the DC power source component in the electrical circuit. So, the correct option is E.
What is meant by direct current ?Direct current or dc can be defined as the flow of electrons, which is in a unidirectional way.
Here,
The given symbol represents the DC power source component in the electrical circuit.
The direct current is the form of power, that has been most commonly produced by the power sources such as batteries, solar cells, etc.
The dc power is mainly used in the devices with low voltage applications such as automotive devices, charging batteries, aircraft applications and also in the low current application devices.
Hence,
The symbol represents the DC power source component in the electrical circuit.
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Which two terms describe how waves of dim blue light are different from
waves of bright red light?
O A Lower amplitude
B. Higher amplitude
OC. Shorter wavelength
O D. Longer wavelength
Answer:
Although the two stimuli are very different in terms of composition, wave forms Two physical characteristics of a wave are amplitude and wavelength lower frequencies, and shorter wavelengths will have higher frequencies At the top of the figure, the red wave has a long wavelength/short frequency.
you push a shopping cart with 2 packs of water bottles. you stop the cart and add two more packs. you push the cart again. does the cart behave differently? explain using science terms.
Answer:
Yes
Explanation:
The cart will definitely behave differently because more weight is added to it.
In order to successfully push a cart, the applied force must exceed the force of the weight of the cart along with its constituents and the frictional force between the tyres and the floor.
When more weights are added (the 2 packs of water bottles), it means that more force would be needed to overcome the opposing forces to the movement of the cart in order to successfully push the cart again.
define period in physics
Please guys help me with this question.
Answer:
(a) 150 N
(b) 15.62 N
(c) 8.54 N
(d) 50 N
Explanation:
From the question above,
(a) F' = F₂-F₁
Where F' = Result force, F₁ = 50 N, F₂ = 200 N
Therefore,
F' = 200-50
F' = 150 N
(b) F' = √(F₁²+F₂²)
Where F₁ = 10 N, F₂ =12 N
F' = √(10²+12²)
F' = √(100+144)
F '= √(244)
F =15.62 N
(c)
F' = √[(F₁+F₂)²+F₃²]
Where F₁ = 6 N, F₂ = 2 N, F₃ = 3 N.
Therefore,
F' = √[(6+2)²+3²)
F' = √(8²+3²)
F' = √(64+9)
F' = √(73)
F' = 8.54 N.
(d)
F' = √[(F₁+F₂)²+(F₃+F₄)²]
Where F₁ = 20 N, F₂ = 10 N, F₃ = 20 N, F₄ = 20 N
F' = √[(20+10)²+(20+20)²]
F' = √[(30)²+(40)²]
F' = √[900+1600]
F' = √[2500]
F' = 50 N
Current in a circuit is measured by an?
Answer:
An ammeter.
Explanation:
The electric current in one part of a circuit is measured with an ammeter, which gives a reading in ampere.
A copper piece cannot br made a magnet why
Answer:
1. A copper piece cannot be changed into magnets, because -
• Only the ferromagnetic metals (the metals which have magnetic properties) can be changed into electromagnets or permanent magnets.
• But,copper is not a ferromagnetic metal and that's why we cannot change the copper into any kind of magnets
Explanation:
What happens when heavy exercise results in too much acid in the human body? Excess H+ is absorbed by bicarbonate ions.
Bicarbonate releases one H+ to become carbonate.
H2CO3 is formed from H2O and CO2.
Bicarbonate is formed from carbonate.
Answer:
A: Excess H+ is absorbed by bicarbonate ions.
Explanation:
Sentence A: At the same time, teachers will benefit from teaching fewer students per semester and gaining more one-on-one time with students Sentence B: For all of these reasons, a change from the traditional seven-period class schedule to more compact, four-class block schedule will be beneficial for both students and teachers. Sentence C: Students will enjoy less homework each night, better focus due to fewer subjects, and more variety, with new classes each semester. Sentence D: When it comes to exchanging the seven- period day to a four-period day, less is definitely more. Which arrangement of these sentences would be best for a conclusion paragraph?
A. B, C, A, D
B. B, D, A, C
C. D, A, C, B
D. C, A, B, D
plz help me
I think its c
d a c b
I hope this is helpful
Answer:
Its A. B, C, A, D
Explanation:
If a car has a mass of 200 kilograms and produces a force of 500 N, how fast will the car accelerate?
100 m/s2
2.5 m/s2
0.25 m/s2
25 m/s2
Answer:
B
Explanation:
F = ma
500N = 200 × a
200a. = 500N
a. =. 500N/200
a. =. 2.5m/s²
PLEASE GIVE BRAINLIEST.
Answer:
B
Explanation:
F = ma
500N = 200 × a
200a. = 500N
a. =. 500N/200
a. =. 2.5m/s²
Hope this helps
Explain how a rock with vesicular texture could form. Give two examples of rocks with this texture.
Answer:
Vesicular texture refers to volcanic rocks that contain holes called vesicles that were formed by gas bubbles in lava. This igneous rock is called scoria. The vesicles form from escaping gas bubbles in cooling lava.
Help!! I don’t know what to do
Answer:
Ok so I think i got it, Left is negative and so is down so if its facing down or left its negative force but if its right and up its positive so
A is neg
B is pos
C is Pos
D is Neg
E is Neg
f is Neg
Explanation:
hope that helps and have a great day
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When both momentum and kinetic energy are conserved,
the collision is an __________
collision.
Answer:
Elastic collision
Explanation:
An elastic collision is a collision in which there is no net loss in kinetic energy in the system as a result of the collision. Both momentum and kinetic energy are conserved quantities in elastic collisions. Supposed two similar trolleys are traveling toward each other with equal speed.
If dan ran the 100m dash in 10.23s. What was his average speed during the race? (Round to the nearest tenth of a second)
Answer:
.1 seconds per meter
Explanation:
I am going to assume they are asking for the average time per 1 meter.
Because it took 10.23 seconds to run 100 meters, we are going to divide 10.23 by 100. This number will be the time per 1 meter.
To divide by 100, we will move the decimal point over by two. That will give us .1023 seconds.
The question asks to round to the nearest tenth, so we round it to .1 seconds.
*Just some trivia: Danie van Blerk does in fact have a time of 10.23 seconds. He has the 1073rd best 100 meter dash time. First place, Usain Bolt, has a time of 9.58 seconds.