A woman on a train traveling at 32 m/s. The train passes a factory whose whistle is blowing at 288 Hz. What frequency does the woman hear as the train approaches the factory?
Answers
Answer:
0.11 m
Explanation:
speed is equal to wavelength multiplied by frequency
So, 32= w × 288
32/288= 0.11
Related Questions
Based on fossil evidence, about how long ago did the
first single-celled life form appear on Earth?O 130 million years ago
O 1.5 billion years ago
O
2.5 billion years ago
O
4.1 billion years ago
Answers
Answer:
4.1 billion
Explanation:
A 60w bulb has a higher resistance than a 100w bulb, since the power rating is given assuming that the bulb is connected to a 120v source by itself. If you connect a 60w bulb and a 100w bulb in series to an outlet, which will shine brighter?.
Answers
Voltage drop across any components in series is proportional to its resistance. 60W bulb has higher resistance than 100W bulb if both the bulbs were rated for same voltage. So higher voltage drop will be across a 60W bulb.
In parallel voltage drops will be same across both the bulbs but current through it will be inversely proportional to the resistance. So 100W bulb draws more current than 60W bulbs.
60W dissipates more energy than 100W bulbs when in series and 100W bulbs dissipates more energy when in parallel.
What is the kinetic energy of a 1.000 g bullet traveling at 1,000 m/s?
Answers
Answer: B
Explanation:
The conventional units for Joules is defined with kilograms. We are given the mass of the bullet in grams. Using the conversion factor of 1kg = 1000g, we get that:
[tex]1g*\frac{1kg}{1000g} =1*10^-^3kg[/tex]
Kinetic energy is defined to be:
[tex]KE=\frac{1}{2} mv^2[/tex]
[tex]KE=\frac{1}{2} (10^-^3kg)(1000m/s)^2[/tex]
[tex]KE=500J=5*10^2J[/tex]
A sound wave has a frequency of 695 Hz in air
and a wavelength of 0.49 m.
What is the temperature of the air?
Relate the speed of sound in air to temperature in units of Kelvin, but answer in units
of Celsius.
Assume the velocity of sound at 0 ◦C is
332 m/s.
Answer in units of degC
Answers
This question involves the concepts of the speed of sound, frequency, and temperature.
The temperature of the air is "14.24 °C".
Temperature of AirFirst, we find the speed of sound at the given temperature:
v = fλ
where,
v = speed of sound = ?f = frequency = 695 Hzλ = wavelength = 0.49 mTherefore,
v = (695 Hz)(0.49 m)
v = 340.55 m/s
Now, the relationship between the speed of sound and temperature can be given by the following formula:
[tex]\frac{v}{v_o} = \sqrt{\frac{T}{273\ k}}\\\\T = (273\ k)(\frac{v}{v_o})^2\\\\[/tex]
where,
T = Temperature = ?v = speed of sound in air at given temperature = 340.55 m/sv₀ = speed of sound in air at 0°C = 332 m/sTherefore,
[tex]T = (273\ k)(\frac{340.55\ m/s}{332\ m/s})^2[/tex]
T = 287.24 k = (278.24 k -273) °C
T = 14.24 °C
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what is the difference between serious and parallel circuit
Answers
In parallel circuits, the behavior of the current as it flows through the circuit is largely dictated by the fact that an electric current will seek out the lowest-voltage portions in a system and occupy these areas in whatever manner it is able to do.
It's not quite that straightforward, but you'll be relieved to know that there are only a handful of extra rules to consider in this situation. What exactly determines the path of least resistance for a current is a mystery.
I hope this helps you
:)
What phase of the moon comes directly before a full moon?.
Answers
9) How much kinetic energy does a person have riding a bike is going 12 m/s? Let's assume that the
bike and person have a mass of 70kg.
A)
B)
C)
Answers
Kinetic Energy = [tex]\frac{1}{2} m*v^2[/tex]
m: mass -->70 kgv: velocity --> 12 m/sKinetic energy = [tex]\frac{1}{2}*70*(12^{2} ) = 5040[/tex] Joules
Hope that helps!
Consider a resistor (R=1000 kΩ) and a capacitor (C=1μF) connected in series. This configuration is connected in series to a battery with an emf of 10 V.
After the capacitor is charged to its maximum value, the capacitor and resistor are disconnected from the battery and from each other. Then they are connected in parallel, so that the capacitor discharges through the resistor. How long will it take for the voltage across the capacitor to drop to 2.50 V?
Answers
Answer:
The maximum pressure is 10 V from across condenser.The highest charge mostly on condenser.
Vc = 10 x 1mf
= 10 ^ - 5C
The time it takes for the condenser to be 5 V different.
Thus we have, 0.69 x 10 ^ - 3 seconds.
Please help!
Which resources are renewable resources?
Select all correct answers.
1. natural gas
2. solar
3. coal
4. hydroelectric
5. biomass
Answers
Answer: The answers are Biomass, Solar, and Hydroelectric! :)
Explanation:
Which of the following is not an example of an electromagnetic wave.
A. microwaves
B. sonar
C. visible light
D. ultraviolet
Answers
Answer:
microwaves
Explanation:
Among the following, the wave which is not an example of the electromagnetic wave is water wave. Thus, the correct option is B. Explanation: Electromagnetic waves are produced as a result of the vibrations between the electric and magnetic fields. Examples of electromagnetic waves are X-ray, lightwave, radio wave, microwave, etc.
help me with this pls
Answers
Answer:
8000J,100J,20
Explanation:
Wi =E×SE =400N × 20cm =8000J
Wo=L×SL=20N×5.0 m=100J
MA =L/E =400N/20N =20
Suppose you had an electrical circuit and decided to change it into a new circuit. does the equivalent resistance of the new circuit compare to the old one ? If you were to insert additional resistors in series, how 。
a. No effect on the equivalent resistance
b. The equivalent resistance decreases
c. The equivalent resistance increases
Answers
Answer:
Yes becuase the circuit is fryed like sum french fries so yes yes is the yes option yes okay, yes but no
Explanation:
If you were to insert additional resistors in series, the equivalent resistance increases. The correct option is c.
What is equivalent resistance?The resistances when connected in series has the equivalent resistance equal to the sum of all the individual resistances.
In the series circuit, the equivalent resistance is
Req= R₁ + R₂ + R₃
Suppose you had an electrical circuit and decided to change it into a new circuit.
The current through the circuit is the same for each resistor in a series circuit and is equal to the applied voltage divided by the equivalent resistance.
Yes, the equivalent resistance of the new circuit compare to the old one.
If you were to insert additional resistors in series, the equivalent resistance increases.
Thus, the correct option is c.
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How does an insulator stop the flow of an electric current? Question 9 options: Electrons in an insulator do not move readily. Insulators convert electric energy to other forms of energy. Insulators have too many electrons. Insulators have a positive charge so they absorb electrons.
Answers
Insulators are often defined as materials that do not allow electricity to flow through them. Option A is correct. Electrons in an insulator do not move readily.
What is an insulator?Insulators are commonly employed in physics. Insulators are often defined as materials that do not allow electricity to flow through them.
Insulators are also referred to as poor electrical conductors. We may discover various instances of these insulators in our daily lives. Insulators include materials such as paper, glass, rubber, and plastic.
Insulators are often defined as materials that do not allow electricity to flow through them. Electrons in an insulator do not move readily
Hence option A is correct. Electrons in an insulator do not move readily
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A Force of 940N does a Work of 3760 Joule in displacing a given object. Find the displacement.
Answers
Question :-
A Force of 940 N does a Work of 3760 J in Displacing a given object . Find the Displacement .Answer :-
Displacement is 4 meter .[tex] \rule {180pt} {2pt} [/tex]
Given :-
Force = 940 NewtonWork = 3760 JouleTo Find :-
Displacement = ?Solution :-
As per the provided information in the given question, Force is given 940 Newton . Work is given 3760 Joule . And, we have been asked to calculate the Displacement .
For calculating the Displacement , we will use the Formula :-
Displacement = Work / ForceTherefore , by Substituting the given values in the above Formula :-
⇒ Displacement = Work / Force
⇒ Displacement = 3769 / 940
⇒ Displacement = 4
Hence :-
Displacement = 4 meter .[tex] \underline {\rule {180pt} {4pt}} [/tex]
Force applied (F) = 940 N
Work done = 3760J
Find:
Displacement (s) = ?
Since, work done (W) is written as
W = (F)(s)
W = Fscos0
W = Fs —> s = W/F
s = 3760J/940N
s = 4m
Therefore, the displacement of the object is 4m
A bus wheel has a diameter of 0.80 m and an angular velocity of 20 rad/s. What is the linear velocity of the wheel?
Answers
The linear velocity of the wheel is 16 m/s.
What is linear velocity?Linear velocity is the rate of change of displacement with regard to time when the object is moving in a straight line
To calculate the linear velocity of the wheel, we use the formula below.
Formula:
v = ωr............. Equation 1Where:
v = Linear velocityω = Angular velocityr = Radius of the wheel.From the question,
Given:
ω = 20 rad/sr = 0.80 mSubstitute these values into equation 1
v = 20(0.8)v = 16 m/s.Hence, The linear velocity of the wheel is 16 m/s.
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A baseball player uses a bat to hit a 0.145-kilogram stationary baseball with a force of 18,436 newtons. What is the force, in newtons, on the player's bat?
Answers
Answer:
18,436 newtons
Explanation:
hope it helps you
shape of houses built in areas with hot climate and materials used
Answers
Answer:
Cement and sand will do
Explanation:
because without it you can't build
Answer:
Shape of houses built in areas with hot climate
Compact house forms, rather than sprawling, multi-wing designs work best in hot locales. Home designs with shaded porches, wrap around porches or plans with courtyards that create a shaded open area within the building are ideal.
How do you build a house in hot climates?
Place courtyards centrally to enhance cooling and ventilation. ...
Choose the right materials. ...
Use waterbodies and landscaping effectively. ...
Shade terraces and outdoor spaces. ...
Create sheltered, barrier-free spaces for air circulation. ...
Extend roofs to protect the walls and windows from direct heat.
Materials used building in areas with hot climate
The most common materials used for building walls in the warm-humid regions are stones, and earth-based bricks.
Concrete, bricks, and tile have a high thermal mass due to the large amount of heat energy needed to change their temperatures. This makes concrete an ideal building material for climates that are hot during the day but cooler at night.
Water flowing from a waterfall before it hits the pond below?
Answers
Answer:
Kinetic Energy
Explanation:
Ang prinsipyo ay nagsasaad na ang enerhiya ay hindi maaaring malikha o masira, ngunit maaari lamang ma-convert mula sa isang anyo patungo sa isa pa. Ang tubig sa tuktok ng napakataas na talon ay nagtataglay ng gravitational potential energy. Habang bumabagsak ang tubig, ang enerhiya na ito ay na-convert sa kinetic energy, na nagreresulta sa isang daloy sa isang mataas na bilis.
Four objects are being tested to see how they are affected by fluid friction. Object W has a surface area of 4. 5 cm2, Object X has a surface area of 2. 5 cm2, Object Y has a surface area of 6. 2 cm2, and Object Z has a surface area of 3 cm2. Which object would experience the most fluid friction? W X Y Z.
Answers
Answer: the most affected object by friction is the Y
Explanation:
The fluid friction consists of 2 parts.
viscous resistance and friction with air.
assuming that the objects are in contact with the air, the situation is described by the following equation.
with: C= numerical drag coefficient
p= density
A= Area of the object
v= velocity
so assuming the other variables are constants the area of the object is directly proportional to the fluid friction
An elongated drop of blood was found with a width of 4.33 mm and a length of 5.0
mm. At what angle did the blood drop hit the surface?
0°
30°
60°
90°
Answers
SinФ = w/l
SinФ = 4.33 / 5.0
Ф = arcsin 4.33/5.0
Ф = 59.99 degrees
Round to 60 degrees
The right back player hits the ball over the net to start play. EIVERCS
___ ___ ___ ___ ___ ___ ___
2. The score is 15-15. EDECU
___ ___ ___ ___ ___
3. Stopping the game for a rest period. MIET TOU
___ ___ ___ ___ ___ ___ ___
4. The serving team fails to score. ODISTEU
___ ___ ___ ___ ___ ___ ___
5. Two out of three games. TCAMH
___ ___ ___ ___ ___
6. A high pass near the net for a player to spike it. ETS
___ ___ ___
7. A hard driven ball from above the net. PKEIS
___ ___ ___ ___ ___
8. Service lands in the opponent’s court without being touched. CAE
___ ___ ___
9. Clockwise movement of players following a side-out. OINTOTAR
___ ___ ___ ___ ___ ___ ___ ___
10. Scoring when a point is awarded on every serve regardless of which team is serving. ALYRL
Answers
The right back player hits the ball over the net to start play. EIVERCS
(((service)))
2. The score is 15-15. EDECU
(((deuce)))
3. Stopping the game for a rest period. MIET TOU
(((time out)))
4. The serving team fails to score. ODISTEU
(((outside)))
5. Two out of three games. TCAMH
(((match)))
6. A high pass near the net for a player to spike it. ETS
(((set)))
7. A hard driven ball from above the net. PKEIS
(((spike)))
8. Service lands in the opponent’s court without being touched. CAE
(((ace)))
9. Clockwise movement of players following a side-out. OINTOTAR
(((rotation)))
10. Scoring when a point is awarded on every serve regardless of which team is serving. ALYRL
(((rally)))
The right back player hits the ball over the net to start play. - SERVE
S E R V E _ _ _
The score is 15-15. - DEUCE
D E U C E _
Stopping the game for a rest period. - TIME OUT
T I M E _ O U T
The serving team fails to score. - SIDEOUT
S I D E O U T _
Two out of three games. - MATCH
M A T C H _
A high pass near the net for a player to spike it. - SET
S E T _
A hard driven ball from above the net. - SPIKE
S P I K E _ _
Service lands in the opponent’s court without being touched. - ACE
A C E _
Clockwise movement of players following a side-out. - ROTATION
R O T A T I O N _
Scoring when a point is awarded on every serve regardless of which team is serving. - RALLY
What is game ?A game is a systematic kind of play that is often done for enjoyment or amusement, however it may also be used as a teaching tool. A lot of games are also regarded as works of art. Sometimes people play games only for fun, while other times they play for recognition or reward.
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can someone please answer this ill give you brainliest and your getting 100 points.
Answers
Answer: i think its b
Explanation:
Answer:
All of the above
Explanation:
Extraction of fuel will affect fuel price so there will be social and economic costs. Extraction from the environment will have environment cost. It is also a political decision with political cost.
So the answer is all of the above.
What happens to the air in an air pump when being pumped into a tire? What happens to the air when allowed to escape from a tire?
Answers
Explain that sound is a longitudinal wave that has a frequency, wavelength, and speed.
Answers
Hope it helps x
During a race, a horse's speed increases from 65 m/s to 73 m/s during the last 5.0 seconds of that race What was the rate of acceleration during this time?
Answers
Answer:
1.6m/s²
Explanation:
It was difficult to type the answer here
During a race, a horse's speed increases from 65 m/s to 73 m/s during the last 5.0 seconds of that race, 1.60 m/s² was the rate of acceleration during this time.
What do you mean by an acceleration ?The rate of change of velocity is defined as acceleration. Acceleration usually indicates that the speed is changing, but this is not always the case. When an object moves in a circular path at a constant speed, it is still accelerating because its velocity direction changes.
Acceleration occurs when the speed of an object increases or decreases, or when it changes direction. Acceleration, like velocity, has two types: average and instantaneous.
a = v - v₀ / t
Then, a = 73 × 65 / 5
a = 1.60 m/s²
Thus, 1.60 m/s² was the rate of acceleration during this time.
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Two bulldozers are pushing on a large tree trunk as shown. (last photo)
Click on the diagram until it correctly represents the expected movement and force.
Answers
The tree will fall in the south eastern side of the area due to two bulldozer.
Direction of tree fallingThe tree falls in the sloppy direction due to both bulldozer which apply force from two directions. One bulldozer apply force on the tree from western side whereas the other bulldozer apply force on the tree from north side so that's why we can say that the tree will fall in the south eastern side of the area.
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Answer:
Maybe it; the 4th image
Explanation:
The upper bulldozer have more force than the lower bulldozer. Therefore making the down force longer than the right force
At 40 degrees is 25g of NaNO3 saturated or unsaturated?
Answers
I think unsaturated
because -
At 55°C, a saturated solution would contain 120 g of solute, NaNO3. (Notice, this point is exactly on the solute's curve). If, for example we mixed in 140 g of NaNO3 instead of 110 g of solute at 55°C, we would create a SUPER saturated solution, because we would be at a point ABOVE the solute's solubility curve.
differentiate between loadstone and bar magnet
Answers
Answer:
Explanation:
Permanent (Bar) Magnet. —-) Electromagnet
They are permanently magnetized. —-) These are temporarily magnetized.
An arch carries the thrust of weight to its _____(1)______. With a _____(2)______, the horizontal part of the structure supports all the weight above it. A. (1) center; (2) post-and-bearing b. (1) base; (2) springing line c. (1) keystone; (2) groin vault d. (1) sides; (2) post-and-lintel Please select the best answer from the choices provided A B C D.
Answers
Option D is correct. An arch carries the thrust of weight to its sides with a post-and-lintel.
What is an arch?
An arch is indeed a vertical curving construction that covers an elevated space that may or may not sustain the load above it or the pressure gradient against it
In the case of a horizontally arched, such as an embankment dam. While arches and vaults are often confused, A vault is defined as an ongoing arch forming a roof.
Option D satisfies the fill-in blanks option.
Hence option D is correct. An arch carries the thrust of weight to its sides with a post-and-lintel.
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What is the best definition of profit?
Answers
Answer:
Excess currency after a series of deals or fees.
Explanation:
Let's put profit in perspective by using an example. For example, let's say you spend 72 dollars to build a certain product, then you sell that same product to your friend for 116 dollars. It costed 72 dollars to build that product and you sold it for 116, after subtracting the costs for building the product the excess currency is what you would call profit. Profit is your overall goal when running a business, you want to sell a product and make profit from it.
Hope this helps.
profit is your gain on any problem,situation or opportunity given to you