Sound from the siren of an emergency vehicle has a frequency of 667.2 hz and moves with a velocity of 349.8 m/s, thus the distance from one condensation to the next is 0.52m.
Sound wave characteristicsWaves of sound exist. A disturbance of matter that is conveyed from its source outward is how sound is more precisely defined. Anything that is shifted out of its balance is considered a disturbance.
Some sound waves are classified as periodic waves, which means that the matter’s atoms move in a straightforward harmonic fashion.
As, a string vibrating creates a sound wave. A portion of the string’s energy is used to compress and expand the surrounding air as it oscillates back and forth.
Pressures are a little bit higher and lower as a result. Low pressure regions are rarefactions, and higher-pressure regions are compressions. The air is moved by the pressure anomaly.
Provided that,
∨= 667.2 hz
V= 349.8 m/s
λ =?
∨ = x/λ
λ = 349.8/667.2
λ = 0.52m
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(choose )
Ramy covered a distance 3080 cm on foot. This distance is equivalent to.........
a) 0.03Km + 80cm
b) 0.3Km +8cm
c) 3Km + 8cm
d) 30Km + 80cm
Answer:
a) 0.03km + 80 cm is the right answer
What is the symbol, atomic number, # of protons, # of electrons, atomic mass, rounded atomic mass, # of neutrons (show work), and period of: nitrogen
The symbol of the element Nitrogen is N, its proton number is 7, its atomic mass is 14, its neutron number is 7 and finally Nitrogen belong to period 2 of the periodic table.
What is an Element?This is defined as a substance cannot be further broken down by any chemical reaction and examples include oxygen, nitrogen etc.
Nitrogen is an element and has an atomic number of 7 with a mass number of 14 and is present in period 2 in the periodic table.
For all atoms with no charge, the atomic number is equal to the number of proton. The number of proton is also equal to the number of electron which is why they all have the same value of 7.
Neutron = atomic mass - atomic number
= 14 - 7 = 7
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Microwaves, such as those used for radar and to heat food in a microwave oven, have wavelengths greater than 3 mm. What is the corresponding frequency of radiation of a wavelength of 13. 4 mm?.
The frequency of electromagnetic waves is 22.32 x 10⁹ Hz or 22.32 GHz.
We need to know about electromagnetic waves to solve this problem. Electromagnetic waves can propagate without media. The speed of electromagnetic in vacuum media is equal to the speed of light. Hence, the wavelength and frequency can be determined as
c = λ . f
where c is the speed of light (3 x 10⁸ m/s), λ is wavelength and f is frequency.
From the question above, we know that
λ = 13.44 mm = 0.01344 m
By substituting the given parameter, we can calculate the frequency of microwaves
c = λ . f
f = c / λ
f = 3 x 10⁸ / 0.01344
f = 22.32 x 10⁹ Hz
f = 22.32 GHz
Hence, the frequency of radiowaves is 22.32 x 10⁹ Hz or 22.32 GHz.
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n order to maintain good sleep hygiene, it is best to reserve your bed for sleeping and to engage in all other activities in other parts of your house.
The extension of an elastic object is __________ proportional to the force applied, as long as the limit of proportionality is not exceeded. What word completes the sentence?
Answer:
Directly
Explanation:
The extension of the elastic object is directly proportional to the force applied.
I hope this is the answer you are looking for and I hope this helps!
What is the total distance travelled by an object travelling at an average speed of
0.0470 km/h for 2 min 33 s?
Total distance traveled by an object traveling at an average speed of
0.0470 km/h for 2min 33s is 1.99 m.
Distance is defined as an object's entire movement without regard for direction. Distance may be defined as how much ground an item has traversed regardless of its starting or finishing place.
The following equation can be used to determine the distance traveled by an object traveling at an average speed:
distance traveled = average speed * time
When is this:
Meters are used to measure distance traveled (m)Meters per second (m/s) is a unit of measure for average speed.Seconds are used to measure time (s)Given,
average speed = 0.0470 km/h
converting average speed from km/h to m/s
= 0.01305556 m/s
time = 2min 33s
converting time in seconds
= 153s
thus, we know that
distance traveled = average speed * time
= 0.01305556 * 153
= 1.99 m
Therefore, the Total distance traveled by the object is 1.99m.
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A jet airliner moving initially at 701 mph to the east where there is no wind moves into a region where the wind is blowing at 848 mph in a direction 13◦ north of east.
What is the new speed of the aircraft with respect to the ground? (b)What is the direction of the aircraft (use coun- terclockwise from due East as the positive an- gular direction, between the limits of −180◦ and +180◦)? HELP WITH PART B
(a) The new speed of the aircraft with respect to the ground is 1,539.13 mph.
(b) The direction of the aircraft is 7⁰ north east.
Resultant speed of the aircraft
The new speed of the air craft is the resultant speed of the aircraft and it is calculated as follows;
R² = A² + B² - 2AB cos(R)
where;
θ is the direction of the air craft measured counter clock wiseSum of the speed in the horizontal directionA = 701 mph + 848 cos(13)
A = 1,527.266 mph
Sum of the speed in the vertical directionB = 848 x sin(13)
B = 190.76 mph
Resultant speedR = √(A² + B²)
R = √[(1,527.66²) + (190.76²)]
R = 1,539.13 mph
Direction of the aircraftθ = arc tan (y/x) = arc tan (B/A)
θ = arc tan (190.76/1527.66)
θ = 7⁰ north east (measured anticlockwise)
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Would the coefficient vary if you tied the string to a similar object of different masses, but on the same surface? Explain
No. it will not change.
The coefficient varies only with the surface texture and not with the area of contact and mass of the object.Here, the objects are of identical texture as the description states that the objects are similar.Also, it says that they are placed on the same surface.So, the 2 surfaces that are touching do not vary and hence the coefficient remains unchanged.Different masses have nothing to do with the coefficient as mentioned early and it only deals with the change in the maximum possible friction force between the surfaces.This fact can be viewed as follows.[tex]\begin{aligned}f &= \mu R\\R &= mg \cdots (\text{from vertical equilibrium})\\\therefore\,\,\,f &= \mu.mg \\f &= (\mu g). m \cdots(\text{friction varies with mass})\\\end{aligned}[/tex]
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This kind of research allows the researcher to either describe a situation or phenomenon or the relationship between two or more variables without any interference from the proponent.
Gay-lussac's law assumes that __________.
a) the temperature is held constant
b) the volume is held constant
c) the number of moles is held constant
Gay-lussac's law assumes that the volume is held constant and the number of moles is held constant.
What is Gay-lussac's law?Gay-Lussac's law states that : The pressure and the temperature of an ideal gas are directly proportional, held mass and volume remains constant.
When the volume is kept as constant, the pressure of a gas will be directly proportional to its temperature.
The law is named after the French physicist and chemist Joseph Gay-Lussac. In 1802, Gay-Lussac formulated this law. It was a formal statement which shows the relationship between temperature and pressure which was described by French physicist, Guillaume Amonton in late 1600’s.
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Fez loves team sports and gets abundant exercise through team activities. When Fez engages in team activities such as running or passing the ball, what is happening to Fez’s muscles?
When Fez engages in team activities such as running or passing the ball, they are maintaining tension with an equal force on all sides.
What does tension mean ?Any physical object that is in contact with another one can apply forces to that object. The pulling force transmitted axially by a string, cable, chain, or other similar object, or by each end of a rod, truss member, or other similar three-dimensional object is referred to as tension. The action-reaction pair of forces acting at each end of said elements can also be referred to as tension.
The force produced when a load is applied at one or more of the ends of a material in a direction away from the material's cross-section is known as the tension force. It's common to describe a tension force as a "pulling" force. To exert a tension force on the material, the load must be applied axially.
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A baseball goes from zero to 32 m/s in 0.164 s.
What is its average acceleration?
Answer in units of m/s².
Answer: Доброе утро, ответ 5+5="4
Explanation:
Find the distance traveled in 27 seconds by an object traveling at a constant velocity of 15 feet per second.
The distance d travelled by in object is 68.58 m
What is velocity ?
velocity is defined as rate of change of displacement d of the object with respect to rate of change in time t. In mathematics It is written as :
v = d/t
it should be noted that, velocity is nothing but speed in particular direction. That is velocity is vector quality having both magnitude and direction where as speed is just the magnitude of velocity.
1 feet = 0.3048 m
15 feet = 4.572 m
Now, calculating the distance d travelled by in object :
d = vt
d = 4.572 x 27
d = 68.58 m
Therefore, the distance d travelled by in object is 68.58 m
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Explain: to steer an airboat, rudders sit behind the fan. When the air passes through the turned rudders, it turns the boat. Use Newton's third law to construct an explanation on how the rudders turn the boat
The explanation on how the rudders turn the boat is by redirecting the fluid which results in an opposite force aiding the motion of the boat.
What is Newton's third law of motion?This law was coined by Isaac Newton and it states that when object X exerts a force on another object Y, the object Y must exert a form of counter force which has the same magnitude but opposite in direction.
In the case of the rudder, it redirects the fluid which then exerts an equal force of the same magnitude and an opposite direction. This thereby results in the motion of the boat and is therefore the most appropriate choice.
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An artificial channel or large pipe for bringing water from a distance is called a(n):________
Answer:
aqueduct- as opposed to an aquifer which is a geological formation
The amplitude of a sound wave is measured in terms of its maximum gauge pressure. by what factor does the amplitude of a sound wave increase if the sound intensity level goes up by 40.0 db?
If the sound intensity goes up by 40 db, the amplitude of wave as measured gets increases by a factor of 100.
CalculationThe sound level in decibels can be formulates as
[tex]\beta[/tex] = (10dB) log (I/Io)
Here Io = 10⁻¹²W/m² is specified as the reference intensity
If we assume β₁ as initial sound intensity and β₂ as final sound intensity. Therefore, change in sound intensity can be formulated as
β₁-β₂=40 dB
(10dB) log (I2/Io) - (10dB) log (I1/Io) = 40 dB
(10dB) [log (I2/Io) - log (I1/Io)] = 40dB
log( (I2/Io) / (I1/Io) ) = 40/10 dB
log (I2/I1) = 4dB
I2/I1 = 10^4
The intensity of sound is said as directly proportional to the amplitude of wave squared.
Therefore,
I ∝ A²
I1/I2 = (A1/A2)^2
A2/A1 = [tex]\sqrt{I2/I1}[/tex]
A2/A1 = 100
Therefore, the amplitude of wave increases by a factor of 100.
What exactly is sound amplitude?A sound wave’s amplitude measures the height of the wave. When a sound is made, the maximum displacement of the medium’s vibrating particles from their mean position determines the amplitude of the sound wave.
In physics, amplitude refers to the greatest displacement or distance that a point on a vibrating body or wave can move relative to its equilibrium location. It is equivalent to the vibration paths half-length.
What do sound frequency and amplitude mean?The maximum displacement of a sound wave’s constituent particles is its amplitude. The number of vibrations a sound wave makes per second is known as frequency.
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You drive a car 1500 ft to the east, then 2500 ft to the north. if the trip took 3.0 minutes, what were the direction and magnitude of your average velocity?
The velocity of the car was 4.93m/s and the direction was northeast.
CalculationIt is given,
time of the trip = t = 3 minutes = 180 seconds
1st distance A = 1500ft = 457.2m east
2nd distance B = 2500ft = 762m north
We are asked to find the average velocity.
First, we get the resultant distance magnitude by applying Pythagoras theorem to find the hypotenuse.
[tex]A^{2} + B^{2} =C^{2} \\C=\sqrt[]{A^{2} +B^{2} } \\C=\sqrt{457.2^{2} +762^{2} } \\C= 888.63m[/tex]
Then we have
Velocity = Distance/time
Velocity = 888.63/180
Velocity = 4.93 m/s
Then the direction is northeast.
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Calculate the density in units of g/ml of a 4.5-g cube with an edge length of 5.5 cm.
The density of a 4.5 g cube with an edge length of 5.5 cm is 0.027 g/mL
The formulas and the procedures we will use are:
v = s³ρ = m/vWhere:
s= edge lengthv= volumeρ= densitym= massInformation about the problem:
s = 5.5 cmm= 4.5 gρ= ?v= ?Calculating the volume of the cube, we get:
v = s³
v = (5.5 cm)³
v = 166.38 cm³
Converting the volume of the cube from cm3 to mL, we get:
1 cm3 is equivalent to 1 mL, so
166.38 cm³ is equivalent to 166.38 mL
Applying the density formula, we get:
ρ = m/v
ρ = 4.5 g/166.38 mL
ρ = 0.027 g/mL
What is density?It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.
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Calculate the height of a cliff if it takes 2. 35 s for a rock to hit the ground when it is thrown straight up from the cliff with an initial velocity of 8. 00 m/s.
The height of the cliff is 8.26 m.
Time taken by a rock to reach the ground from the cliff is t.
t = 2.35 seconds
The initial velocity at which rock is thrown straight up is u.
u = 8 m/s
The gravity of the earth is g.
g = 9.8 m/s²
The height of the cliff from where is rock is thrown straight up at the initial velocity of 8 m/s is,
[tex]Height= Initial \: velocity × Time - \frac{1}{2} Gravity \: of \: the \: earth ×( Time) ^{2} [/tex]
[tex]h = 8 \times 2.35 - \frac{1}{2} \times 9.8 \times (2.35) ^{2} [/tex]
h = -8.26 m
Therefore, the height of the cliff is 8.26 m.
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How does a chef use science.
Answer:by cooking
Explanation: because he use energy and everything like transfer
I NEED HELP ASAP. I dont understand it
Answer:
I don't have the full details so... Position 1 + Position 2
That's if "0" doesn't count as a position.
Explanation:
"What was the distance traveled" is basically "how much did you travel?"
e.g. Position 1 was 12 miles, and Position 2 was 7. 12 + 7 = 19.
The shaded region in the diagram below is a region of uniform electric field that is parallel to the horizontal direction (x-axis). A charge
Q = −4.9 µC
moves through this region as shown by the green arrow.
(b) The work done by the electric field as the charge moves from location A to location B is +2.30 10-3 J. What is the potential difference
VB − VA?
(A) The direction of electric field in given region is to the left.
(B) The potential difference is -0.46×[tex]10^{3}[/tex].
(A) When charge is present in any form, a point in space has an electric field that is connected to it. The value of E, often known as the electric field strength, electric field intensity, expresses the strength and direction of the electric field.
Therefore, the direction of electric field in given region is to the left.
(B) The amount of work required to move a unit charge from one point to another point is equal to the potential difference between two points in an electric circuit.
[tex]V_{B} -V_{A}[/tex] = W / Q
[tex]V_{B} -V_{A}[/tex] = 2.30×[tex]10^{-3}[/tex] / -4.9×[tex]10^{-6}[/tex]
[tex]V_{B} -V_{A}[/tex] = -0.46×[tex]10^{3}[/tex]
Therefore, the potential difference is -0.46×[tex]10^{3}[/tex].
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When the pilot reverses the propeller in a boat moving north, the boat moves with an acceleration directed south. Assume the acceleration of the boat remains constant in magnitude and direction. What happens to the boat?.
When the pilot reverses the propeller in a boat moving north, the boat moves with an acceleration directed south. Assume the acceleration of the boat remains constant in magnitude and direction. The boat will eventually stops and then speeds up in the reverse direction.
As the pilot reverses the propeller in a boat moving north, the boat moves with an acceleration directed south. This is because the propeller is pushing against the water in the opposite direction to the boat's motion. The acceleration of the boat remains constant in magnitude and direction until the boat reaches its maximum speed in the reverse direction. At this point, the boat will eventually stop and then speed up in the reverse direction.
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there was once a crab name mr crabs who had to go to the docter one day . mr crabs is a an animal in the ____ phylum which was not surpising since he has 10 jointed legs
there was once a crab name mr crabs who had to go to the docter one day . mr crabs is a an animal in the arthropods phylum which was not surpising since he has 10 jointed legs
What five classes make up the phylum Arthropoda?Traditional classifications of arthropods place them in the Trilobitomorpha (Trilobites), Chelicerata, Crustacea, Myriapoda, and Hexapoda subphyla.
Arthropod species make up more than 80% of all known extant animal species, with estimates ranging from 170,000 to 5–10 million.
On Earth, arthropods are regarded as the most successful creatures.
Arthropods, however, are also in charge of a number of helpful human functions, including crop pollination, honey production, devouring or parasitizing insect pests, garbage decomposition, and serving as food for various birds, fish, and mammals. Beneficial arthropods flourish in agricultural areas.
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Which type on manometer must take the atmospheric pressure into account to calculate the pressure exerted by a gas?
A closed end manometer is manometer must take the atmospheric pressure into account to calculate the pressure exerted by a gas.
in closed end manometer, the pressure of gas is measured by measuring the height 'h' and there is no use of atmospheric pressure here.
what is manometer?
A manometer could be a device that we utilize to measure the pressure of the pipelines (cab be of gas, water, fluid, etc.) Moreover, it is usually referred to as a U-shaped tube that's filled with a liquid. In this point, to examine what is it and how it works.
Types of manometer
U-Tube Manometer.
Enlarged-Leg Manometer.
Well-Type Manometer.
Inclined-Tube Manometer.
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Triangle has a base that is decreasing at a rate of 11cm/s with the height being held constant. what is the rate of change of the area of the triangle if the height is 7cm?
The rate of change of the area of the triangle if the height is 7cm is 38.5 cm/s
What is Rate of change?
A rate is anything that can be measured over time. Common rates include velocity (which is the rate of distance traveled), power (rate of work being done), etc. All these have one thing in common which is that they are all divided by the amount of time it took to obtain a certain measurement.
Let the base of the triangle be b,
the height of the triangle = h
and the area of the triangle = A
Area of a triangle, A is = bh/2
Rate of change of the area, A is :
dA/dt = d(1/2(bh))/dt = 1/2 (db/dt)h + 1/2(bdh/dt)
At constant height, dh/dt = 0
that is
dA/dt = 1/2(db/dt)h
It is given that :
db/dt = 11 cm/s
h = 7cm
dA/dt = (11x7)/2 = 38.5 cm/s
Therefore, the rate of change of the area of the triangle if the height is 7cm is 38.5 cm/s
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A pollster calls 500 randomly selected people, and all 500 respond to her first question. because the subjects agreed to respond, is the sample a voluntary response sample?
No. Since the people selected were randomly, the responders constituted random sample from the population.
What is voluntary response sample?Voluntary response sample is a sample which is made up of individuals who can volunteer to be included in response sample.
For example, If a radio host asks her listeners to conduct an online survey on her website about peoples opinion of her show. Each individual listener is voluntarily deciding to take part in survey or not.
The major drawback of sampling method is that these individuals who voluntarily respond is likely to have a stronger opinion which can be positive or negative from the rest of the population which eventually makes them an un-representative sample.
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A force of 200.0 n is exerted on a 1,000 n object. the object moves a distance of 30.0 m. how much work was done on the car?
When a force of 200.0 n is exerted on a 1,000 n object. The object moves a distance of 30.0 m. 24,000J work was done on the car.
Work=Force × Distance is a formula that describes the relationship between work, force, and distance. While distance is expressed in meters, force is expressed in Newtons (N). The result is Joule.
So, total force is 1000-200 = 800N
Work=Force × Distance
Work=800 × 30
Work=24,000J
So, when a force of 200.0 n is exerted on a 1,000 n object. The object moves a distance of 30.0 m. 24,000J work was done on the car.
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A force F has components Fx = 100 Newtons, and Fy= 153.2 Newtons. Express F in terms of unit
vectors and find its magnitude and angle
The magnitude of the unit vector of the forces is 182.92 N and the direction is 56.87⁰.
What is a unit vector?A unit vector is a type of quantity that has both magnitude and direction.
A unit vector can also be described as a single vector that can represent two vectors in terms of magnitude and direction.
What is resultant vector?A resultant vector is defined as a single vector that produces the same effect as is produced by a number of vectors collectively.
The unit vector of the two forces is calculated as follows;
R² = Fx² + Fy²
where;
Fx is the force in horizontal directionFy is the force in vertical directionR is the resultant vectorR = √( Fx² + Fy²)
R = √( 100² + 153.2²)
R = 182.95 N
What is the direction of the vector?The direction of the vector is calculated as follows;
θ = arc tan (Fy/Fx)
θ = arc tan (153.2 / 100)
θ = 56.87⁰
Thus, the magnitude of the unit vector of the forces is 182.92 N and the direction is 56.87⁰.
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What is the magnitude of the electric field e(r) at a distance r>rb from the center of the ball?
The magnitude of the electric field e(r) at a distance r>rb from the center of the ball is [tex]E = p \frac{r_{b}^{3} }{3E_{0} r^{2} }[/tex].
Gauss's law, often referred to as Gauss's flux theorem, is a principle of physics and electromagnetic that establishes a connection between the distribution of electric charge and the consequent electric field.
Applying gauss law,
[tex]E = \frac{q}{E_{0}(4\pi R^{2}) }[/tex]
[tex]q =p(\frac{4}{3} \pi r_{b}^{3} )[/tex]
Now, plugging in the values of [tex]q =p(\frac{4}{3} \pi r_{b}^{3} )[/tex] in the equation: [tex]E = \frac{q}{E_{0}(4\pi R^{2}) }[/tex]
[tex]E = \frac{p(\frac{4}{3}\pi r_{b} ^{3}) }{E_{0}(4\pi R^{2}) }[/tex]
[tex]E = p \frac{r_{b}^{3} }{3E_{0} r^{2} }[/tex]
Therefore, the magnitude of the electric field e(r) at a distance r>rb from the center of the ball is [tex]E = p \frac{r_{b}^{3} }{3E_{0} r^{2} }[/tex].
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