Final answer:
The Doppler effect involves changes in frequency due to the relative motion between a wave source and its observer, not changes in the speed of sound.
Explanation:
What occurs with the Doppler effect are changes in frequency due to motion. The Doppler effect is a phenomenon observed with waves, where there is an alteration in the observed frequency of a sound or light due to the relative motion between the source and the observer. It's important to note that the Doppler effect does not involve a change in the speed of sound due to motion, but strictly involves changes in frequency.
The practical applications of the Doppler effect are vast, ranging from medical diagnostics using Doppler-shifted ultrasound to determine blood flow, to astronomy where it helps in the study of the motion of stars and galaxies. Fundamentally, the effect explains how the motion affects the perceived pitch of a sound for an observer; for example, the high pitch of an approaching ambulance siren that lowers as it moves away.
An air bag applies a force of 6100 N to bring about a change in momentum of 3540 kg m/s. How much time did it act over
A. 0.26 s
B. 6.1 s
C. 0.58 s
D. 35 s
E. 1.7 s
What is the wavelength (in air) of a 13.0 khz vlf radio wave?
Final answer:
The wavelength of a 13.0 kHz VLF radio wave in air is calculated using the formula λ = v / f, with the speed of light as the speed. This yields a wavelength of about 23,077 meters, or 23 kilometers, illustrating the long-distance propagation capabilities of VLF radio waves.
Explanation:
The question pertains to calculating the wavelength of a 13.0 kHz VLF (Very Low Frequency) radio wave in air. The formula that links the wavelength (λ), frequency (f), and speed (v) of a wave is λ = v / f. For electromagnetic waves in air, the speed can be approximated to the speed of light, which is roughly 3×108 meters per second (m/s).
Using this formula:λ = 3×108 m/s / 13,000 Hz = approximately 23,077 meters.
Therefore, the wavelength of a 13.0 kHz VLF radio wave in air is about 23 kilometers. This large wavelength is characteristic of VLF radio waves, allowing them to propagate over long distances and curve around the Earth's surface, making them useful for communication over the horizon without the need for satellite or cable transmission.
Which statement best describes the electrons in this illustration ?
A) The electrons are negatively charged particles located outside the nucleus
B) The electrons are positively charged particles located inside the nucleus
C) The electrons are negatively charged particles located inside the nucleus
D) The electrons are positively charged particles located outside the nucleus
Please help according to the photo I attached.
The correct answer will be rewarded! Thanks.
The statement which best describes the electron in the given illustration is the electrons are negatively charged particles located outside the nucleus.
What is electron?Electron is the the elementary particle of atom. The electron is negatively charged element of a atom, with the magnitude equal to the [tex]1.6\times10^{-19}[/tex] C. This charge of electron is equal and opposite of the charge of proton.
The neutron (neural partial of atom) and the proton(positively charged particle of atom) is located inside the nuclease.
Unlike the neutron and proton, the electron located outside of the nucleus as shown in the image given in the problem.
Lets check all the option-
A) The electrons are negatively charged particles located outside the nucleus- As the electron are negatively charged particle and unlike the neutron and proton, the electron located outside of the nucleus. Thus, this is the correct option.B) The electrons are positively charged particles located inside the nucleus- As the electron are negatively charged. Thus, this is an incorrect option.C) The electrons are negatively charged particles located inside the nucleus- Unlike the neutron and proton, the electron located outside of the nucleus. Thus, this is an incorrect option.D) The electrons are positively charged particles located outside the nucleus-As the electron are negatively charged. Thus, this is an incorrect option.Thus, the statement which best describes the electron in the given illustration is the electrons are negatively charged particles located outside the nucleus. Therefore, the option A is the correct option.
Learn more about electron here;
https://brainly.com/question/9540576
It's not physics it's physical science but I figured this was the closest subject to it. 1. The life cycle of a star begins with a cloud of gas and dust called a (1 point)
Which of the following statements is true?
A. Like charges attract and unlike charges repel each other.
B. Gravitational forces only exist between large masses.
C. On a level surface, normal force is greater than the weight of the object.
D. Applied forces are those created by another object or person.
Answer:
C.
Explanation:
I did this assignment
The rope will snap if the tension in it exceeds 55.0 n. what is the maximum value of the force f which can be applied?
The picture is a model of a nitrogen atom. What is incorrect about the atomic orbital arrangement of electrons in this model and how should they be arranged?
Which of the following stars is likely to appear the brightest?
The star with the least energy
The most massive star
The farthest star
The coldest star
The most massive star is likely to appear the brightest. Hence option B is correct.
What is Most massive star ?The sun may be the most massive object in the solar system, making up 99.8% of the system's total mass, yet compared to other stars, it is actually rather typical. Of all known stars, roughly half are more massive and half are less massive. R136a1, a star that is more than 300 times as massive as the sun, is the most massive star known to exist in the sky. Yet it's not the only star dwarfing the main star of the Earth.
The Tarantula Nebula contains RMC 136a1, more often known as R136a1, which is located around 163,000 light-years from Earth. The Great Magellanic Cloud, one of the Milky Way's satellite galaxies, contains this huge star, which is located outside of our galaxy.
In 1960, astronomers at the Radcliffe Observatory in South Africa discovered the RMC 136 star cluster. More than 200 incredibly brilliant stars were discovered in the cluster when the Hubble Space Telescope analysed the system; the most massive of these stars was known as RMC 136a1.
Hence option B is correct.
To know more about massive star :
https://brainly.com/question/8110709
#SPJ3
A longitudinal wave lacks which of the following properties? a. speed. b. frequency. c. wavelength. d. amplitude. e. A longitudinal wave has all of the above.
The correct option is (e). A longitudinal wave has all of the properties like speed, frequency, wavelength & amplitude.
Longitudinal waves are characterized by their unique properties, which include speed (a), frequency (b), wavelength (c), and amplitude (d). Here's a brief explanation of each property:
a. Speed (a): This is the rate at which the wave propagates through a medium. It is typically measured in meters per second (m/s) and depends on the properties of the medium, such as its density and elasticity.
b. Frequency (b): This is the number of complete cycles of the wave that pass a given point per unit time. It is measured in hertz (Hz) and is related to the pitch or tone of a sound wave, which is a type of longitudinal wave.
c. Wavelength (c): This is the distance between two consecutive points in the wave that are in phase, such as two adjacent peaks or two adjacent troughs. It is usually denoted by the Greek letter lambda [tex]\lambda[/tex] and is related to the frequency and speed of the wave by the equation [tex]\( v = f \lambda \)[/tex], where v is the speed, f is the frequency, and [tex]\( \lambda \)[/tex] is the wavelength.
d. Amplitude (d): This is the maximum displacement of a point on the wave from its rest position. It determines the loudness or intensity of a sound wave and is related to the energy carried by the wave.
If a negatively charged particle moves into a magnetic field traveling in a straight line, how would you expect its motion to change? A) The particle would slow and stop moving. B) The particle would travel in a curved path. C) The particle would continue traveling in a straight line. D) The particle would make a right angle turn and then continue traveling in a straight line.
Answer:
B) The particle would travel in a curved path.
Explanation:
I just took the test and this is the correct answer
What conclusions can be drawn about the existence of nitrogen-14 and nitrogen-15? A) They are isotopes of nitrogen and they contain the same number of protons and electrons but each contains a different number of neutrons - 7 and 8 respectively. B) They are the same form of nitrogen and they include the same number of electrons and neutrons but each contains a different number of protons - 7 and 8 respectively. C) They are several allotropes of nitrogen and they accommodate the same number of neutrons but each contains a different numbers of protons and electrons - 7 and 8 respectively. D) They are different configurations of nitrogen and they consist of the same number of protons and neutrons but each contains a different number of electrons - 7 and 8 respectively. Eliminate
Read the sentence. telescopes or satellites _____ that neither mercury nor venus _____ a moon. which pair of verb forms correctly completes the sentence? proves; has proves; have prove; have prove; has
When there is or in-between two words, the tense is dependent upon the word that comes after or. In other words, the word that is closest to the verb will decide the form of the verb.
Since satellites is a plural form of a satellite, the verb that follows satellites should also be plural. The plural verb in the given options is prove.
As far as the second blank is concerned, you can see Venus is a proper noun; therefore, the verb that comes after Venus should be a singular verb, which in this case is has.
So the complete sentence would become the following:
Telescopes and satellites prove that neither Mercury nor Venus has a moon.
Correct pair: prove:has
Describe the energy transformations that occur from the time a skydiver jumps out of a plane until landing on the ground.
Which sentence most likely explains why the rock has large open pores
Answer:I got it right on quiz
Explanation:
How does newton's first law of motion relate to galileo's concept of inertia?
What is the approximate percentage change in the Earth-Sun distance between June 21 and December 21?
What feature of double-glazed windows makes them good insulators? a. Thick glass is highly viscous. c. Heat conduction cannot take place through solid glass b. There is a vacuum between the panes of glass d. Thermal energy is not transferred through the special chemical glazing.
Which of the following would be more likely to utilize capitalism-based land management methods?
a.
city planners
b.
federal regulators
c.
corporate directors
d.
all of the above
the correct answer is c. corporate directors I just took the test and federal regulators was wrong.
Two or more velocities add by ____?
Plz help
In physics, two or more velocities are usually added by using vector addition, adding together their horizontal and vertical components. For example, if one object moves east at 3 m/s and another north at 4 m/s, you would add these using a graph and the Pythagorean theorem.
Explanation:In physics, two or more velocities are typically added by methods of vector addition. To add velocities, you first decide on a common reference frame. Then, you perform vector addition, which includes adding the x-components (horizontal velocities) together to get the total x-component, and adding the y-components (vertical velocities) together to get the total y-component.
For instance, if one object is moving at a velocity of 3 m/s to the east, and another object is moving at a velocity of 4 m/s to the north, you would add these velocities together by drawing them as arrows on a graph, and then using the Pythagorean theorem to find their resultant velocity. This is known as adding velocities, and it's crucial in understanding the concepts of motion and direction in physics.
Learn more about Adding Velocities here:https://brainly.com/question/34180662
#SPJ6
I need the answers to this please
The presence of which phenomenon proved the predictability of the big bang theory?
The grid in a triode is kept negatively charged to prevent… A. the variations in voltage from getting too large. B. the electrons from being attracted to the grid instead of the anode. C. electrons being repelled back to the cathode. D. electrons from escaping from the tube containing the triode.
Answer:
B. the electrons from being attracted to the grid instead of the anode.
Explanation:
just because it is
List these drinks in order of kinetic energy, starting with the drink whose particles have the highest kinetic energy.
hot chocolate, water, juice, milk
hot chocolate juice, milk, water
water milk, juice, hot chocolate
water, hot chocolate, juice, milk
Answer: Option (b) is the correct answer.
Explanation:
The energy obtained by an object because of their motion is known as kinetic energy.
Hence, when particles of an object is moving rapidly from one place to another then it means the molecules have high kinetic energy.
Therefore, in a hot chocolate molecules will have high kinetic energy due to increase in temperature. Whereas particles of juice has more kinetic energy than milk. On the other hand, molecules of water will have least kinetic energy as only then it is existing in liquid state otherwise it would have evaporated.
Thus, we can conclude that drinks in order of decreasing kinetic energy are as follows.
hot chocolate > juice > milk > water
Roberto and his sister had a garden in the backyard. Every spring they grew strawberries, like the plant you see here. Plants make their own food through the process of photosynthesis. What non-living parts of this backyard ecosystem are needed for the plant to survive? A) oxygen, water, and sunlight B) water, oxygen, and sunlight C) water, carbon dioxide, sunlight D) carbon dioxide, oxygen, sunlight
If the radius of earth decreased, with no change in mass, what would happen to your weight
Answer:
weight would increase
Explanation:
People living in the Amazon Rain Forest want to clear the forest of vegetation and create farmland so they can grow crops. How will clearing away vegetation affect soil erosion
Explain how fusion and fission are similar to and different from each other. Thanks.
The graph shows a marble rolling down a curve from position 1 to position 5. In which position is the potential energy of the marble greatest?
The graph shows a marble rolling down a curve from position 1 to position 5. In position 1 the potential energy of the marble is greatest.
What is mechanical energy?Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total stored energy in the system which is represented by total potential energy.
The expression for total mechanical energy is as follows
ME= PE+KE
Where ME is the mechanical energy
PE is the total potential energy
KE is the total kinetic energy
As total mechanical energy is the sum of all the kinetic as well as potential energy stored in the system. At the highest point of position 1, the potential energy of the marble ball would be greatest.
Learn more about mechanical energy from here
brainly.com/question/12319302
#SPJ2
The image shows a pendulum that is released from rest at point A. Shari tells her friend that no energy transformation occurs as the pendulum swings between point B and point D.
What is the best response that Shari’s friend could make?
She could agree with Shari because the pendulum is at the same height and would have the same gravitational potential energy at both positions.
She could agree with Shari because the pendulum has the same amount of mechanical energy throughout its swing.
She could disagree with Shari because the pendulum converts kinetic energy into gravitational potential energy, then back into kinetic energy.
She could disagree with Shari because the pendulum converts gravitational potential energy into kinetic energy, then back into gravitational potential energy.
Answer:
She could disagree with Shari because the pendulum converts gravitational potential energy into kinetic energy, then back into gravitational potential energy.
Explanation:
The energy of the pendulum is constantly converted from gravitational potential to kinetic, and back.
In fact:
- the gravitational potential energy of the pendulum is given by:
[tex]U=mgh[/tex]
where m is the mass of the pendulum, g is the gravitational acceleration, and h is the height of the pendulum above the ground
- The kinetic energy of the pendulum is given by:
[tex]K=\frac{1}{2}mv^2[/tex]
where v is the speed of the pendulum.
Therefore, when it is at a higher position, the pendulum has a greater potential energy, while when it is at a lower position, the pendulum has a greater kinetic energy (because its speed is higher).
In this example:
- when the pendulum swings from B to C, part of its gravitational potential energy is converted into kinetic energy (because the height decreases but the speed increases), and when the pendulum goes from C to D, the kinetic energy is converted back into gravitational potential energy (because the height increases and the speed decreases)
What important discovery was made by edmond halley and alexis clairaut, using newton's ideas of mathematics and gravity?
Answer:
Comet's orbit.
Explanation:
Edmond Halley and Alexis Clairaut were one of those Newtonian who helped to validate the results of Isaac Newton.
They correctly explained Comet' motion and how planets gravitational force affect them.
But using Newton's idea of Mathematics and Gravity, they have made two important discoveries:
1. Why celestial bodies have different colors.
2. They were able to find the Comet's orbit and prediction(year) of its return.