If the observer and source are moving toward each other, then the frequency increases and the wavelength decreases.
What is dopper effect?The Doppler effect defines the shift in frequency of a wave sound caused by movement of the wave source and/or receiver. We'll talk about it in terms of sound waves, but the Doppler effect applies to any type of wave. The Doppler effect, like ultrasound, has a wide range of uses, from medical (with sound) to police radar and astronomy (with electromagnetic waves).The Doppler effect happens when there is relative motion between the observer and the source, not just for sound. Doppler shifts, for example, occur in the frequency of sound, light, and water waves. When ultrasonography is reflected from blood in a medical diagnosis, Doppler shifts can be utilized to assess velocity.To learn more about dopper effect from the given link
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The sun's apparent yearly path across our sky against the background stars would not be described as?
The Sun's apparent yearly path across planet Earth's sky against the background stars wouldn't be described as the celestial equator.
What is a solar system?A solar system can be defined as a collection of the outer and inner planetary (astronomical) bodies alongside the Moon that are in orbit around the Sun, in slightly elliptical orbits.
The planets in the solar system.Basically, there are nine (9) planets in the solar system and these include;
MercuryVenusEarthMarsJupiterUranusNeptunePlutoSaturnBased on astronomical records and information, we can infer and logically deduce that the Sun's apparent yearly path across planet Earth's sky against the background stars wouldn't be described as the celestial equator.
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If the angular speed of a 1. 1-m baseball bat is 2. 0 rad/s, what is the tangential speed of the tip of the bat?.
Tangential speed of the tip of the bat is 2.2 m/s
Given:
angular speed = 2 rad/s
radius of ball = 1. 1-m
To Find:
tangential speed
Solution: Tangential velocity is the linear speed of any object moving along a circular path. A point on the outside edge of a turntable moves a greater distance in one complete rotation than a point near to the center.
The rate of variation in the matter's tangential velocity along a circular path is known as tangential acceleration.
A tangent line traced to the circle at the location of the object points in the direction of the velocity vector at any given time.
Here, v is Tangential speed t is the time ω is angular speed and r is radius
Vt = ω r
V = 2 x 1.1
V = 2.2 m/s
Hence the Tangential speed is 2.2m/s
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A satellite is 1200 k above the earth (radius = 6400 k); it completes one revolution in 90min. what is the linear speed?
A satellite is 1200 k above the earth (radius = 6400 k); it completes one revolution in 90min. what is the linear speed?
530.58 (1200+6400)*pi*2/90
What is linear speed?The measurement of a moving object's actual distance traveled is called linear speed. Linear speed is the rate of motion of an object along a straight line. In plain English, it is the distance traveled along a linear path in the allotted amount of time.
A pseudovector used in physics to express how quickly the angular location or orientation of an item changes over time is called an angular velocity or rotational velocity The pseudovector's direction is normal to the instantaneous plane of rotation or angular displacement, and its magnitude corresponds to the object's angular speed, or the rate at which it rotates or revolves. The right-hand rule is a common way to specify the direction of angular velocity.
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A 60-watt light bulb carries a current of 0. 5 ampere. the total charge passing through it in one hour is________.
Answer:
charge passed = 1800 C
Explanation:
• We can use the following formula to calculate charge:
[tex]\boxed{Q = It}[/tex],
where:
Q = charge in Coulombs
I = current in amperes (0.5 A)
t = time in seconds (1 h = 60 min = 3600 s).
• Substituting the values into the formula:
charge = 0.5 × 3600
= 1800 C
Suppose you drop a feather and a hammer on the moon from the same height at the same time. what will happen?
The feather fell at the same rate as the hammer.
The Moon's surface gravity is about 1/6th as powerful or about 1.6 meters per second per second. The Moon's surface gravity is weaker because it is far less massive than Earth. A body's surface gravity is proportional to its mass, but inversely proportional to the square of its radius.
Gravity accelerates both objects at the same rate, but if no other force than gravitational force act on the object , and as we know that air resistance affect the rate of fall but at moon their is no air resistance. Hence their is no other force acting on the feather and hammer than the gravitation force of moon .
Because the Apollo crew were essentially in a vacuum, there was no air resistance, the feather fell at the same rate as the hammer. This is exactly what Galileo had concluded hundreds of years before: all objects released together fall at the same rate regardless of mass.
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What happens to the density of a a gas when a fixed mass is compressed into a smaller volume?
a) density stays the same.
b) density increases.
c) density decreases.
A gas when a fixed mass is compressed into a smaller volume then b) density increases.
Density is the measurement of how tightly a material is packed together. It is defined as the mass per unit volume. Density Symbol: D or ρ Density Formula: ρ = m/V, where ρ is the density, m is the mass of the object and V is the volume of the object.
Mass is the measure of object's inertia, more the mass more the inertia. It is a property of material , so it does not change with place. SI unit is 'kg'. It is a scalar quantity.
Volume is a three-dimensional quantity that is used to measure the capacity of a solid shape. It means the amount of three-dimensional space a closed figure can occupy is measured by its volume.
Density = mass / volume
if mass is fixed, then mass = constant
Density will be inversely related to volume
hence , on compression , volume get decreased but mass is constant hence , density will increase
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On which of saturn’s moons did the cassini-huygens probe land in 2004, providing our first view of the varied and active surface?
On Titan, the largest moon of of Saturn did the Cassini-Huygens probe land in 2004.
To find the answer, we have to know more about the Cassini-Huygens Mission.
What is Cassini-Huygens mission?Before arriving at its final destination of Saturn in 2004 and beginning a series of flybys of Saturn's moons, the spacecraft contributed to studies of Jupiter for six months in 2000. In the same year, it launched the Huygens probe to explore Titan's atmosphere and surface makeup on Saturn's moon. During its second extended mission, Cassini sailed between the rings, entered the planet's atmosphere, and obtained the first measurements of a whole seasonal period for Saturn and its moons.Thus, we can conclude that, on Titan, the largest moon of of Saturn did the Cassini-Huygens probe land in 2004.
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Fetch is ________. Group of answer choices the distance between the trough of a wave and the still water level the circular pattern made by water particles when a wave passes a method of shoreline erosion control the distance over which the wind blows over open water
Fetch is the distance over which the wind blows over open water generating mechanical waves; option D
What are waves?Waves are disturbance which occur in a substance or medium which project energy as they travel along a particular plane or direction.
There are two types of waves:
mechanical waveselectromagnetic wavesMechanical waves are waves which involve the disturbances that occur in particulate matter and which require a material medium for their transmission.
Fetch is an area of ocean or lake surface over which the wind blows in a constant direction, thus generating waves.
In conclusion, mechanical waves require material media for transmission.
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How do waves made by a dripping faucet compare to the waves seen passing through slits?
The dripping faucet onto the wave causes the frequency to stay the same throughout, it just moves up and down.
When a wave is passed through the single slit, diffraction occurs. The light spreads out and after it passes through the slit, it interferes with itself.
At resonance, a driven rlcrlc circuit has vcvc = 5. 0 vv , vrvr = 8. 0 vv , and vlvl = 5. 0 vv. part a what is the peak voltage across the entire circuit?
At resonance, a driven rlcrlc circuit has vcvc = 5. 0 vv , vrvr = 8. 0 vv , and vlvl = 5. 0 vv having a peak voltage across the entire circuit
For any voltage waveform, the peak voltage is the highest point or voltage value. When Pulse Width Modulation (PWM) devices, like variable frequency drives, are added to a power system with a peak voltage that is equal to the square root of two times the RMS voltage, a power quality problem results.
Find the peak voltage, for instance, if the RMS voltage is 85 V. The average voltage and maximum voltage of AC power coming from the wall are both about 110 V. Therefore, the real peak voltage is 120/0.707 = 170 V. The sinusoid's amplitude is divided in half by this. Peak-to-peak voltage (Vp-p), also known as the total amplitude, is 340 V, or twice the peak voltage.
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What is the instantaneous value of a 10 ampere peak sine wave at 0, 30, 45, 60, and 180 degrees?
The instantaneous value of a sinusoidal waveform is the value of the alternating function at any particular instant.
The instantaneous value of a 10 ampere peak sine wave at 0, 30, 45, 60, and 180 degree are 0 A, 5 A, 7.07 A, 8.66 A, 0 A respectively.
From the question,
Instantaneous value is given as 10 A
The instantaneous value of a sine waveform is determined by the relation,
Instantaneous value = Peak value x sin θ
Substituting values in the above equation;
For 0°⇒
instantaneous value = 10 x sin 0°
= 10 x 0
= 0 A
For 30°⇒
instantaneous value = 10 x sin 30°
= 10 x (1/2)
= 5 A
For 45°⇒
instantaneous value = 10 x sin 45°
= 10 x (1/√2)
= 10 x 0.707
= 7.07 A
For 60° ⇒
instantaneous value = 10 x sin 60°
= 10 x (√3 / 2 )
= 10 x 0.866
= 8.66 A
For 180° ⇒
instantaneous value = 10 x sin 180°
= 10 x 0
= 0 A
Hence the instantaneous value of a 10 ampere peak sine wave at 0, 30, 45, 60, and 180 degree are 0 A, 5 A, 7.07 A, 8.66 A, 0 A respectively.
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When a car is coasting downhill, how are its potential and kinetic energies changing?
When a car is coasting downhill, the kinetic and potential energies are increasing and decreasing respectively.
What are kinetic and potential energy?Kinetic energy is the energy possessed by an object because of its motion, equal to one half the mass of the body times the square of its speed.
Potential energy, on the other hand, is the energy possessed by an object because of its position (in a gravitational or electric field), or its condition (as a stretched or compressed spring, as a chemical reactant, or by having rest mass).
According to this question, a car going downhill will begin to speed because there is lesser friction. This suggests that the kinetic energy increases while the potential energy decreases.
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Assuming the earth is a uniform sphere of mass M and radius R, show that the acceleration of free fall at the earth's surface is given by g=GM/R^2
use Newton's gravitational law and 2nd law .....
A sound wave leaves the loudspeaker. As it travels, it experiences a temporary increase in wavelength and then returns to its original wavelength. Which of the following scenarios could explain this change in wavelength? Select ALL that apply.
A
The sound wave traveled into the rocky ground.
B
The sound wave traveled through a glass of water.
C
The sound wave reflected off of a rock wall nearby.
D
The sound wave traveled through a person walking along the shore.
E
The sound wave traveled through a helium balloon (helium is less dense than air).
A sound wave leaves the loudspeaker. As it travels, it experiences a temporary increase in wavelength and then returns to its original wavelength. The sound wave traveled through a helium balloon (helium is less dense than air could explain this change in wavelength
The pattern of disruption brought on by energy moving away from the sound source is known as a sound wave. Longitudinal waves are what makeup sound. This indicates that the direction of energy wave propagation and particle vibrational propagation are parallel. The atoms oscillate when they are put into vibration.
A high-pressure and a low-pressure zone are created in the medium as a result of this constant back and forth action. Compressions and rarefactions, respectively, are terms used to describe these high- and low-pressure zones. The sound waves go from one medium to another as a result of these regions being transmitted to the surrounding media.
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A charge of 12 c passes through an electroplating apparatus in 2. 0 min. what is the average current?
The average current is 0.10 A.
CurrentCharge moving through a location on a circuit at a constant rate is called current. When numerous coulombs of charge pass over a wire's cross section in a circuit, it produces a large current. It is not necessary for a wire to be moving at a fast speed in order to have a high current if the charge carriers are tightly packed into the wire. To put it another way, many charge carriers traveling through the cross section is sufficient; they do not need to travel a great distance in a single instant. The amount of charges that flow through a cross section of wire on a circuit, as opposed to how far they travel in a second, is what determines current.
A charge of 12 c passes through an electroplating apparatus in 2. 0 min. what is the average current?
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What is the wavelength of maximum intensity and the total energy emitted by a celestial object at absolute zero?
Wavelength is Infinity
What is Wavelength?
A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in the consecutive cycles. This length is often defined in wireless systems in metres(m), centimetres(cm), or millimetres(mm).
A blackbody never approaches zero, hence the wavelength of the highest intensity that a heavenly object may produce is infinite. As a celestial object's temperature rises, its overall energy output increases quickly.
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What observational evidence supports the idea that mercury once shrank by some 20 kilometers in radius?
Move the chemistry book across the physics book again. study the thermometer to determine whether there’s a change in the physics book’s temperature. what do you find?
Heat is always transferred through the movement of matter in the convection mode of heat transmission.
What is heat transfer ?Heat transfer is the movement of heat from one solid or liquid item to another. Always, heat moves from one body with a greater temperature to one with a lower temperature. To put it another way, heat always transfers from a hotter body to a cooler body.
Heat energy is transferred through the mechanism of conduction when nearby atoms or molecules collide. In solids and liquids, where particles are more closely spaced, conduction happens more easily than in gases, where particles are more widely spaced.Here we can say that heat is transfer when there is movement between two books and hence there is change in temperature.Learn more about Heat transfer here:
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Answer:
The temperature of the physics book increases as the chemistry book slides across it.
Explanation:
pluto
In general, the further planets are from the sun, the cooler they are. what other factor can have a significant influence on a planet’s surface temperature?
The factor that can have a significant influence on a planet’s surface temperature is its atmosphere.
What is the role of the atmosphere in the planet's temperature?The atmosphere plays a fundamental role in the Earth planet's temperature because it allows the entry and out of certain types of radiation that may increase the temperature.
The role of the atmosphere in the Earth's temperature is well documented because our temperature is thick and it increases its homeostatic temperature balance.
In conclusion, the factor that alters a planet’s surface temperature is its atmosphere.
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The distance between two crests a and b of a wave is 24cm. if there are two crests in between a and b, then the wavelength of the wave is
The wavelength of the wave is 23.55 rad/s.
What is a wavelength simple definition?
Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire.
Distance b/w one crest and one trough is λ/2 and b/w two crests or two trough it is λ.
Therefore from 2nd crest to 6th trough the total distance
= 4 λ + λ /2 => 9 λ/2
that is given as:
9 λ/2 = 24 cm
λ= 16/3 cm
V = w/k => w × λ /2pi => w = 2 × 3.14 × 20 × 3/16 => 23.55 rad/s
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The electric potential at a certain point is given by v = –7. 5x2 3x, where v is in volts and x is in meters. what is the electric field at that point?
The electric potential at certain point is given by,v=-7.5x²-3x ,where v is in volts and x is in meters. then the electric field at that point is -(15x+3).
Given,
The electric potential at certain point is given by,
v=-7.5x²-3x .
where v is in volts and x is in meters.
We know,
electric potential (v) =electric field ×radius
Electric potential is defined as the amount of work needed to move a charge from reference point to the specific point against an electric field.
Also, electric field (E) =dv/dx
Electric field at a point is the force experienced by the unit positive charge placed at that point.
E=d(-7.5x²-3x)/dx=-15x-3
Thus ,the electric field at that point is given by -(15x+3 ).
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Disclaimer:the data in the question is incorrect .here is the complete question .
Question: the electric potential at a certain point is given by v=-(7.5x²+3x).where v is in volts and x is in meters.what is the electric field at that point?
The colors of a soap bubble or oil slick are due to __________. two-slit interference thin-film interference huygens' principle diffraction
Answer:
Thin film interference
Which one of the following possesses the highest elasticity? a. Rubber b. Glass c. Copper d. Steel
Answer:
Correct option is D)
Steel
Answer:
Steel gives
Explanation:
Glass: 50−90GPa
Rubber:0.01−0.1GPa
Steel:200GPa
Copper: 117GPa
A pump lifts 200 kg of water to a water tank placed at a height of 25m in 20 s. Find its power. g = 10 m/s² [Ans: 2500 W]
Answer:
2500W
Explanation:
P = W/t
As we know that
W = mgh
so:
P = mgh/t
put values
P = (200)(10)(25) / 20
P = 2500W
Find both the scalar projection compvuand the vector projection projvuof the vectoru=〈1,−1,1〉onto the vectorv=〈1,0,1〉. answer:. . . . . . . . . . . . . . . . . . . .
Its Scalar projection [tex]\sqrt{2}[/tex] and Vector projection 1 (i+0j+k).
How to find scalar projection and vector projection ?We have been given two vectors <1 -1 1> and vector <1 0 1> , we are to find out the scalar and vector projection of vector <1 -1 1> onto vector <1 0 1>
We have vector a = <1 -1 1> and vector b = <1 0 1>
The scalar projection of vector a onto vector b means the magnitude of resolved component of vector a in the direction of vector b and is given by
The scalar projection of vector a onto vector b = [tex]\frac{vector b . vector a}{|vector b| }[/tex]
= [tex]\frac{(1-1+1)(1+0+1)}{\sqrt{1^{2} }+0+1^{2} }[/tex]
=[tex]\frac{1^{2} + 1^{2} }\sqrt{2}[/tex]
= [tex]\sqrt{2}[/tex]
The Vector projection of vector a onto vector b means the resolved component of vector a in the direction of vector b and is given by
The vector projection of vector a onto vector b .
= [tex]\frac{vector b . vector a}{| vector b|^{2} }[/tex] (i+0j+k)
= [tex]\frac{(1-1+1)(1+0+1)}{{1^{2} }+0+1^{2} }[/tex]. (i+0j+k)
= [tex]\frac{1^{2} + 1^{2} }{\sqrt{2} }[/tex] (i+0j+k)
= 1 (i+0j+k).
Thus from the above conclusion we can say that scalar projection scalar projection [tex]\sqrt{2}[/tex] and vector projection 1 (i+0j+k).
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State two examples where the factor perpendicular is practically used to increase pressure?
Pressure can be calculated by Pressure=Force/Area.
Therefore, if the area is decreased or reduced then pressure will be increased.
What is Pressure?The physical amount of force applied to a certain region is known as pressure. Pressure is defined as force per unit of area. The pressure being applied to a body may be calculated by taking the amount of force being applied and dividing it by the area of contact.
Pressure=Force/Area.
two examples where the factor perpendicular is practically used to increase pressure
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If the 20-mm-diameter rod is made of a-36 steel and the stiffness of the spring is k = 67 mn/m , determine the displacement of end a when the 60-kn force is applied. take e = 200 gpa
The displacement at the end of A is 1.09 mm
According to the question,
Rod's diameter, d= 20 mm
Stiffness constant, k = 55 M-N/m or,
= 55 × 10⁶ N/m
Force, f = 60 kN or,
= 60 × 10³ N
Young's modulus, E = 200 Gpa or,
= 200 × 10⁹ pa
We know the formula,
A=[tex]\pi d^2 /4[/tex]
By substituting the values,
= [tex]\pi (0.02)^{2} /4[/tex]
=0.0003 m³
length, L =A×E/K
=1.14 m
hence,
The displacement be:
60×10³×1.14/0.0003×200×10³×10³×10³=1.09 mm
Displacement is 1.09 mm
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The displacement of end a is 1.09mm
given:
Rod diameter,d=20mm
stiffness constant,k=55mn/m
force,f=60kn
young modulus,E= 200gpa
we know the formula
[tex]\pi \: d {}^{2} /4[/tex]
By substituting values in the above formula
[tex] = \pi(0.02) {}^{2} /4[/tex]
[tex] = 0.0003m {}^{3} [/tex]
length L=A×E/K
=1.14m
Hence, displacement is
[tex]60 \times 10 {}^{3} \times 1.14 \times/0.0003 \times 200 \times 10 {}^{3} \times 10 {}^{3} \times 10 {}^{3} [/tex]
=1.09mm
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The best single rockets made by humans have an initial to final mass ratio of about 15. What mass ratio would be required to launch a single rocket into space, and what does it mean
The mass ratio which would be required to launch a single rocket into space in the most possible efficient way is that the ratio of rocket mass to fuel mass be; 1: 14.
What is the mass ratio required to launch a single rocket into space?According to the task content, it follows that the best single rockets made by humans have an initial to final mass ratio of about 15.
In essence, it follows that if the total mass initially was 15 mass units, the final mass would be 1 mass unit.
Consequently, 14 mass units must have burned as fuel in the rocket.
On this note, it follows that the mass ratio which would be required to launch a single rocket into space is; 15: 1 and this means there are 14 mass units of fuel for the 1 mass unit of actual rocket.
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When you have two of the same charges along a horizontal line, where is the electric field the greatest? is there ever a point where the field will be zero?
When you have two of the same charges along a horizontal line, The electrical field is the greatest the closest it is to the charges. And there will be a zero charge in between the two like charges.
Electric field can be considered as an electric property associated with each point in the space where a charge is present in any form. An electric field is also described as the electric force per unit charge.
The formula of electric field is given as;
E = F /Q
Where,
E is the electric field.
F is a force.
Q is the charge.
The electrical field is the greatest the closest it is to the charges because there will be high electric strength and electric field strength is greatest where the lines are closest together and weakest where lines are furthest apart. Also , there will be a zero charge in between the two like charges.
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What did you observe when placing the small coil in the middle of the larger coil?
With more turns of wire within the coil, the greater the strength of the static magnetic field around it.
Electromagnetic induction uses the relationship between electricity and magnetism whereby an electric current flowing through a single wire will produce a magnetic field around it. If the wire is wound into a coil, the magnetic field is greatly intensified producing a static magnetic field around itself forming the shape of a bar magnet giving a distinct North and South pole.
Likewise, if we kept the bar magnet stationary and moved the coil back and forth within the magnetic field an electric current would be induced in the coil. Then by either moving the wire or changing the magnetic field we can induce a voltage and current within the coil and this process is known as Electromagnetic Induction and is the basic principle of operation of transformers, motors and generators.
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