Answer:
The frequencies of the first four harmonics are 248 Hz, 496 Hz, 744 Hz, and 992 Hz
Explanation:
Given;
fundamental frequency, f₀ = 248 Hz
Frequency of the nth harmonic = n x fundamental frequency
First harmonic, f₁ = 1 x f₀ = 248 Hz
Second harmonic;
2f₀ = 2 x 248 Hz = 496 Hz
Third harmonic
3f₀ = 3 x 248 Hz = 744 Hz
Fourth harmonic
4f₀ = 4 x 248 Hz = 992 Hz
Therefore, the frequencies of the first four harmonics are 248 Hz, 496 Hz, 744 Hz, and 992 Hz
why is breaking down a compoud into its elements considered a chemical change
Answer:
Chemical change is characterized by the formation of new substances, and the making and breaking of strong chemical bonds.
Explanation:Decomposition of a compound into its elemental constituents certainly falls under this umbrella
On arrival at a vehicle collision, you observe a small fire in the engine compartment. A bystander is attempting to smother the fire with a jacket as you approach with an A-B-C extinguisher from your ambulance. Which of the following is the best method of extinguishing the fire?
a. Sweep the nozzle of the extinguisher left and right using short bursts until you are out of extinguishing agent.
b. Aim at the base of the fire and use short bursts until the fire is out.
c. Close the hood to contain the fire within the engine compartment.
d. Aim the nozzle to the side of the fire and, with a sweeping motion, push the fire at its base
Answer:
Aim at the base of the fire and use short bursts until the fire is out.
Explanation:
Fire extinguishers use CO2 (Carbondioxide) as the extinguishing agent. This is because CO2 is denser than air, and does not support combustion.
Aiming at the base of the fire causes the CO2 to fall on the base of the fire, where the source of the fire is, trapping it, and preventing it from further reacting with air in a combustion reaction. Also, the short burst creates a strong wind that forces the flame to blow out.
illustrate a body of mass 5.0kg pulled by horizontal force F . if the body accelerates 2.0ms² and experience a frictional force of 5N
a. calculate the netforce
b. magnitude of force
c. coefficient of kinetic friction
Explanation:
a. Net force is mass times acceleration (Newton's second law).
∑F = ma
∑F = (5.0 kg) (2.0 m/s²)
∑F = 10 N
b. The net force is the sum of the individual forces.
10 N = F − 5 N
F = 15 N
c. Friction force here is mgμ.
mgμ = 5 N
(5.0 kg) (10 m/s) μ = 5 N
μ = 0.1
If one were to stack thick fabric fabric on top of one another, then push the opposite ends towards one another, resulting and bending and rumpling, this would illustrate what physical process?
Answer:
The answer is "folding".
Explanation:
It is a physical reconfiguring of the process, which gives a fabric a softer, lightweight shape. It is achieved in a far less simple space to carry or store products.
When one places effect sizes on each other, instead move the different ends to each other and fold and roll it, its linear function of Folding would be illustrated. Except in geography, the piling process naturally creates space to makes the surface clearer and lighter.A weight lifter lifts a set of 212 kg weights to a height of 1.75 m. How much
potential energy to the weights now have?
Answer:
Potential energy = 3635.8 Joules
Explanation:
Given that,
Weight lifted by a weight lifter is 12 kg
It lifts to a height of 1.75 m
We need to find the potential energy to the wights now have. The energy possessed by an object due to its position or height above ground is called potential energy. Its formula is given by :
P = mgh
g is the acceleration due to gravity
[tex]P=212\ kg\times 9.8\ m/s^2\times 1.75\ m\\\\P=3635.8\ J[/tex]
So, the potential energy is 3635.8 joules.
A pie is cooked in an oven at 200 °C. The aluminium film that covered the pie can be touched soon after it is removed while the pie is still dangerously hot, explain this.
Answer:
A pie is cooked in an oven at 200 °C. The aluminium film that covered the pie can be touched soon after it is removed while the pie is still dangerously hot, explain this.
Explanation:
Allison wants to calculate the denisty of a rock. To do this, what tools will she need to measure
the mass and volume of the rock?
Answer:
Explanation:
Allison can measure the mass of the rock by using a scale. An electronic beam balance will be able to give her the mass of the rock to a fairly accurate degree.
To go about measuring the volume of the rock, an indirect approach has to be adopted since the rock is not regular in shape. Allison would have to adopt a principle that explains that the volume a solid body displaces when immersed in a pool of liquid, is directly equal to the volume of the solid itself.
This means that if the stone is placed in a beaker of water containing an already measured volume of water, the increase in the volume of the water when the stone is immersed is equivalent to the volume of the stone.
1. If the front of the red car is used as a reference point, how far away is the white van?
Answer:
-36 m
Explanation:
In the diagram, the front of the black car is used as reference point which is point 0. The distance from the black car to the front of the red car is 15 m while the distance from the black car to the white van is - 21 m. The negative sign means the white van is behind the black car.
If the red car is used as the reference (point 0), the distance from the black car to the red car would be -15 m and the distance from the black car to the white van would be -21 m. Hence:
Distance from red car to white van = distance from the black car to the red car + distance from the black car to the white van = -15 + (-21)
Distance from red car to white van = -15 - 21 = -36 m
Answer:
The answer is -36
Explanation:
A newly discovered planet has a radius twice as large as earth's and a mass five times as large. What is the free-fall acceleration on its surface?
Answer:
free-fall acceleration = 12.25 m/s²
Explanation:
Formula for free fall acceleration is given by the gravity equation;
g = Gm/r²
Where;
M is mass of the Earth
r is radius of the Earth
G is the gravitational constant
Now, that equation applies to the earth.
For this new planet, we are told that the mass = 5 × mass of earth
And radius = 2 × radius of earth.
Thus, free fall acceleration for this planet is;
g_p = G(5m)/(2r)²
g_p = (5/4)(Gm/r²)
Gravitational constant has a value of 6.674 × 10^(−11) N.m²/kg²
Mass of the earth = 5.972 × 10^(24) kg
Radius of the earth = 6378 km = 6378000
Thus;
g_p = (5/4)(6.674 × 10^(−11) × 5.972 × 10^(24))/(6378000²) = 12.25 m/s²
Jupiter has a mass of 1,898,000,000,000,000,000,000,000,000 kg. How would
this number be expressed in scientific notation?
A. 1.898 x 1027 kg
B. 1.898^27 kg
C. 189.8 x 10^27 kg
D. 1.898 x 10^24 kg
PLEASE HELP SOON AS POSSIBLE
Answer: 1,898 • 10^27 kg
Explanation:
A pex
The mass of Jupiter can be expressed in scientific notation as 1.898 ×10²⁷ Kg. Therefore, option (A) is correct.
What is scientific notation?Scientific notation can be described as a form of representing very large numbers in a simpler form. As we know, whole numbers can be extended to infinity, but we cannot write such numbers on a piece of paper.
Scientific notation helps us to represent the numbers that are very huge in a form of multiplication of single-figure numbers and 10 raised to the power of the respective exponent.
To determine the exponent of 10, we should follow the rule such as the base must be always 10. The exponent should be a non-zero integer, which means it can be either positive or negative.
The absolute value of the coefficient should be greater than or equal to 1 but it must be less than 10.
Given the number is 1,898,000,000,000,000,000,000,000,000 Kg can be written as 1.898 ×10²⁷ Kg in scientific notation.
Learn more about scientific notation, here:
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Anyone please help ASAP Why must the volume of a stereo in a room with wall-to-wall carpet be tuned higher than in a room with a wooden floor?related to sound.
Explanation:
A carpet absorbs sound making the room quieter. A wooden floor reflects sound making it louder. ... The carpet surface absorbs some of the sound, making the room less “live.”
An astronaut throws a rock in outer space away from gravitational / frictional influences. Will the rock gradually stop or continue in a straight line at a constant speed?
Explanation:
the rock will go in constant slow speed
The closest meaning to the word hypothesis is
Answer:
A hypothesis is an idea or explanation that you then test through study and experimentation.
Answer:an educated guess
Which of these actions is an example of chemical weathering? A. Freezing water widens the cracks in rocks B. plant roots force their way into cracks and rocks and brake them C. oxygen an area eggs with our content in rocks causing them to change color D. strong winds peel soft rock away leaving hard rock behind
Answer:
A. freezing water widens the cracks in rocks
Explanation:
chemical weathering (from what i can tell anyways) is when water comes in contact with rocks and over time wears it down.
Why does weight change depending
on location?
Answer:
gravity
Explanation:
gravity pulls you down so for example you will weigh more on earth than on the moon because earths gravitational pull is greater.
The driver of a car makes an emergency stop by slamming on the car's brakes and skidding to a stop. How far would the car have skidded if it had been traveling twice as fast
Answer:
4 times as far
Explanation:
It is kinda hard but this equation should explain x−x0=v0v0a0−a0v202a20=v202a0 so 4 times (and if you would have been going 3 times as fast it would be 9 times as far...)
Answer:
The car would have skidded 4 times as far if it had been traveling twice as fast.
A ray of white light moves through the air and strikes the surface of water in a beaker. The index of refraction of the water is 1.33 and the angle of incidence is 30º. All of the following are true EXCEPT:I. the angle of reflection is 30º.II. the angle of refraction is 30º.III. total internal reflection will result, depending on the critical angle.
Answer:
La frecuencia será la misma en los dos medios, y en el vacio, no varia.
b) Vacío : n = 3,684 10 m 1,33 = 4 900 Å ,3161 10 m 55,1 n
,6 105 10 Hz
3,161 10 m
v 1,93 10 m/s 193548,38 km/s =
1,55
10 3 m/s
n
c
Vidrio v: =
,6 107 10 Hz
3,684 10 m
v 2,25 10 m/s 225 000km/s =
33,1
10 3 m/s
n
c
a
108.756 divided by 9.35
Answer:
11.63
Explanation:
A quarterback pedals 3.3 meters southward and then 5.7 meters northward for this motion what is the distance moved?
Answer:9
Explanation:
we are adding the numbers given to find the total.
What should students do before inserting the plug of an electrical device into a socket?
Explanation:
They should make sure the area is dry
when you turn on music on your phone, what energy transformation takes place?
Answer:
the Battery of the phone contains chemical energy which transfers Light and Sound energies.
C
A downhill skier was able to move 560 meters in 25 seconds. What is the skie
answer to the nearest tenth of a meter per second.)
The skier's average speed is
m/s
Explanation:
Speed = distance / time
v = 560 m / 25 s
v = 22.4 m/s
Answer:
22.4
Explanation:
Hope this helps
S= 560m÷25s=22.4m/s
How does work affect energy between objects so it can cause a change in the form of energy? Work transfers energy. Work changes energy. Work increases energy. Work decreases energy.
Answer: Work can transfer energy between objects and cause a change in the amount of total energy. Work can transfer energy between objects and cause a change in the form of energy. ... When a spring is compressed, the energy changes from kinetic to potential.
Answer:
work can transfer energy
Explanation:
sense there is a ton of effort in work it can accumulate energy. physical and thermal energy. :)
A giant armadillo moving northward with a constant acceleration covers the distance between two points 60 m apart in 6
seconds. Its velocity as it passes the second point is 15m/s.
Answer:
a = 1.66 m /s²
Explanation:
This is a kinematics exercise
v = v₀ + a t
x = v₀ t + ½ a t²
we solve for the initial velocity in the first equation and substitute in the second
v₀ = v - at
x = (v- at) t + ½ a t²
x = vt - a t² + ½ a t²
x = v t - ½ a t²
we seek acceleration
a = (v t -x) 2 / t²
let's calculate
a = (15 6 - 60) 2/6²
a = 1.66 m /s²
Can someone Please Help!!
Answer:
If the ball is accelerating down through the air with no horizontal motion, the net forces acting on the ball must follow: C. The gravitational force is greater than the drag.
Explanation:
This is because the gravitational force is directed downward and the drag force opposes the direction of motion (therefore the drag force is directed upwards). Since the ball is accelerating downwards, the gravitational force must be greater than the drag force in order to create this acceleration.
We know that the other options are incorrect because if the net force on the ball was directed upwards, the ball would be accelerating upwards. If the net force on the ball was zero, the ball would not be accelerating at all. If the drag was greater than the gravitational force, then the ball would be accelerating upwards as well.
Hope this helps!
The force of air particles over an area is_____?
If we increase the amount of work being done, and all other factors remain the same, the amount of power would
Answer:
The power will increase
Explanation:
Power is the rate in which work is done or the rate of doing work
The formula for power is given as follows;
[tex]Power = \dfrac{Work \ done}{Time \ taken \ to \ do \ the \ work}[/tex]
Therefore, power is directly proportional to work, and when work is increased provided all other factors remain constant, the power will be increased proportionately.
As such, for example, when the work is doubled, and the time to do the work is the same, the power has also doubled.
URGENTE ¿Cuál de los siguientes términos corresponde al concepto presión? * A. Es la fuerza perpendicular que ejerce un cuerpo sobre un volumen. B. Es la fuerza que ejerce perpendicularmente sobre la masa de un cuerpo. C. Es el área que se ejerce en forma perpendicular sobre un cuerpo para generar fuerza. D. Es la fuerza que un cuerpo ejerce perpendicularmente sobre el área en la que actúa.
Answer:
Respuesta correcta, opción D: Es la fuerza que un cuerpo ejerce perpendicularmente sobre el área en la que actúa.
Explanation:
La definición de presión es la fuerza que un cuerpo ejerce en dirección perpendicular sobre el área en la que actúa.
Cuando se aplica una fuerza sobre la superficie de un cuerpo, la presión es la siguiente:
[tex] P = \frac{F}{A} [/tex]
En donde:
F es la fuerza aplicada.
A es el área del cuerpo.
Por lo tanto la opción correcta es la D: es la fuerza que un cuerpo ejerce perpendicularmente sobre el área en la que actúa.
Espero que se sea de utilidad!
Why do you think it is important to recycle materials?
Answer:
To use them in future projects and saving the community.
Explanation:
An explanation about using them in future projects is that you can, for example, use plastic for a biology project. It's also a proven fact that recycling can help the environment so there will be less pollution due to having certain recyclables in the wrong places such as the ocean.
Which refers to the rate of change in velocity? speed acceleration direction magnitude I need this answer i cant figure it out!!
Answer: Acceleration
Explanation: In this case its most likely acceleration as it has the definition of quick change in velocity. Therefore, the answer is acceleration.
Acceleration refers to the rate of the change in the velocity , therefore the correct answer is option B .
What is acceleration ?The rate of change of the velocity with respect to time is known as the acceleration of the object. Generally, the unit of acceleration is considered as meter/seconds².
As given in the problem statement we have to find out which terminology from the given list of options refers to the rate of change in velocity .
Speed refers to the rate of the change in the distance, while magnitude refers to the numerical quantity of any measured quantity .
The acceleration of any material = rate of the change of the velocity of the material
Thus , Acceleration refers to the rate of the change in the velocity, therefore the correct answer is option B.
To learn more about acceleration from here , refer to the link given below ;
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