Final answer:
When the wavelength of a wave doubles, its speed remains the same, while its frequency halves.
Explanation:
According to the information provided, all waves on the electromagnetic spectrum travel at the same speed in a vacuum, which is the speed of light, approximately 3 × 108 m/s. When the wavelength of a wave doubles, its frequency halves while its speed remains the same. This is because the product of the wavelength and frequency of a wave is equal to the speed of the wave, which is a constant in a given medium.
For example, if we have an electromagnetic wave with a wavelength of 2 meters and a frequency of 150 MHz (1 MHz = 106 Hz), its speed would be (2 m)(150 × 106 Hz) = 3 × 108 m/s. If the wavelength doubles to 4 meters, the frequency would halve to 75 MHz, but the speed would remain 3 × 108 m/s.
In summary, as the wavelength of a wave doubles, its speed remains the same, while its frequency halves.
Julio hit a baseball. What caused the ball to change direction at the time of impact?
a.the force of gravity
b.the speed of the ball
c.the force of his swing
d.the weight of the air
Answer: The force of his swing
Explanation: When Julio hit the baseball, the ball changed the direction after the impact. The contact force exerted by the bat on the baseball when it swing caused the change in direction of the ball. The force exerted in time t is causes change in momentum.
the force of gravity acts on the ball all the time. The speed of the ball is not a factor to change direction. The weight of the air exerts a drag on the ball which is also constant. Hence, only the force of swing caused the changed in the direction of the ball.
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.
A sprinter set a high school record in track and field, running 200.0 m in 20.6 s . what is the average speed of the sprinter in kilometers per hour?
Answer : The average speed of the sprinter is, 34.95 Km/hr
Solution :
Average velocity : It is defined as the distance traveled by the time taken.
Formula used for average velocity :
[tex]v_{av}=\frac{d}{t}[/tex]
where,
[tex]v_{av}[/tex] = average velocity
d = distance traveled = 200 m
t = time taken = 20.6 s
Now put all the given values in the above formula, we get the average velocity of the sprinter.
[tex]v_{av}=\frac{200m}{20.6s}\times \frac{3600}{1000}=34.95Km/hr[/tex]
conversion :
(1 Km = 1000m)
(1 hr = 3600 s)
Therefore, the average speed of the sprinter is, 34.95 Km/hr
The average speed of the sprinter in kilometers per hour is about 35.0 km/h
Further explanationAcceleration is rate of change of velocity.
[tex]\large {\boxed {a = \frac{v - u}{t} } }[/tex]
[tex]\large {\boxed {d = \frac{v + u}{2}~t } }[/tex]
a = acceleration ( m/s² )
v = final velocity ( m/s )
u = initial velocity ( m/s )
t = time taken ( s )
d = distance ( m )
Let us now tackle the problem !
This problem is about Kinematics.
We will solve it in the following way
Given:
distance traveled = d = 200.0 m
time taken = t = 20.6 s
Unknown:
average speed = v = ?
Solution:
[tex]v = \frac{d}{t}[/tex]
[tex]v = \frac{200}{20.6}[/tex]
[tex]v = \frac{1000}{103} ~ m/s[/tex]
Next we will change the units of this speed into km/h.
[tex]v = \frac{1000}{103} \times \frac{3600}{1000} ~ km/h[/tex]
[tex]v = \frac{3600}{103}~ km/h[/tex]
[tex]v \approx 35.0 ~ km/h[/tex]
Learn moreVelocity of Runner : https://brainly.com/question/3813437Kinetic Energy : https://brainly.com/question/692781Acceleration : https://brainly.com/question/2283922The Speed of Car : https://brainly.com/question/568302Answer detailsGrade: High School
Subject: Physics
Chapter: Kinematics
Keywords: Velocity , Driver , Car , Deceleration , Acceleration , Obstacle , Speed , Time , Rate
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.
What are two ways you can increase the magnetic field of an electromagnetic?
To increase an electromagnet's magnetic field, add more turns to the coil and increase the current flowing through it. Inserting a ferromagnetic core can also enhance magnetic field strength, but limitations exist due to coil resistance and the properties of superconducting materials.
Explanation:To increase the magnetic field of an electromagnet, you can perform the following modifications:
Increase the number of turns in the coil: Adding more turns to the solenoid will enhance the magnetic field as it is directly proportional to the number of turns in the wire.Increase the current: By increasing the electrical current flowing through the coil, the magnetic field will also increase due to the direct relationship between current and magnetic field strength.Another method often used to enhance the strength of an electromagnet is by inserting a ferromagnetic material, such as iron, within the coil, which acts as a core to concentrate the magnetic field.
However, it is important to note that there are limits to the strength of the magnetic field that can be created. Exceeding certain thresholds can lead to an overheating problem due to coil resistance, or can destroy the superconducting properties if superconducting materials are used.
It takes 5.0 seconds for a wave with a wavelength of 2.5 m to travel past your location. What’s the period of the wave. What is the frequency of the wave and what’s the speed of the wave
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
Which of the following processes add methane (CH4) to the atmosphere?
A.Breakdown of plant and animal remains in the soil.
B. Leakage from natural gas pipelines.
C. Food digestion by land animals.
D.All of the above.
Answer: D.All of the above.
Methane is a colourless odourless gas that develops abundantly in nature.
A.Breakdown of plant and animal remains in the soil: The plant and animal remains contains large amount of organic matter, which is decomposed by soil bacteria. This process results in formation of methane gas. The process takes place in the absence of oxygen, hence, called as anaerobic decomposition. This gas gets liberated to the external environment.
B. Leakage from natural gas pipelines: The natural gas is obtained as a fossil fuel from deep layers of the earth. This gas is excavated in order to use it as fuel to run vehicles and for cooking food. The gas may liberate to the external environment by leakage.
C. Food digestion by land animals: The land animals such as cow and buffalo discharge dung, which is a rich source of methane. The methane gets liberated from the cow dung to the external environment.
Therefore, all processes are responsible for liberation of methane to the external environment.
All of the above the following processes add methane (CH₄) to the atmosphere.All the options are correct.Hence D is the correct option.
What is methane?Methane is a colorless, odorless gas that occurs naturally in large quantities.
A.Soil bacteria digest plant and animal remnants: Plant and animal remains include a huge quantity of organic materials, which soil bacteria degrade.
Methane gas is produced as a result of this process. Anaerobic decomposition is a type of breakdown that occurs in the absence of oxygen. This gas is then released into the atmosphere.
B. Natural gas pipeline leakage: Natural gas is a fossil fuel that is extracted from deep layers of the earth.
This gas is mined in order to use it as a source of energy for cars and cooking. Leakage might allow the gas to escape into the environment.
C. Food digestion in land animals: Land animals digest food in a variety of ways.
Hence option D is correct.
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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
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
If the radius of earth decreased, with no change in mass, what would happen to your weight
Answer:
weight would increase
Explanation:
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
Describe the energy transformations that occur from the time a skydiver jumps out of a plane until landing on the ground.
Two identical balls are thrown vertically upward. the second ball is thrown with an initial speed that is twice that of the first ball. how does the maximum height of the two balls compare? two identical balls are thrown vertically upward. the second ball is thrown with an initial speed that is twice that of the first ball. how does the maximum height of the two balls compare? the maximum height of the second ball is two times that of the first ball. the maximum heights of the two balls are equal. the maximum height of the second ball is four times that of the first ball. the maximum height of the second ball is 1.41 times that of the first ball. the maximum height of the second ball is eight times that of the first ball.
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.
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.
The change in __________ is the amount of energy in a system that is available to do work.
The atmospheric temperature decreases when snow starts melting because the snow------------------------- from the atmosphere to melt.
A. releases thermal energy
B. absorbs thermal energy
C. releases temperature
D. absorbs temperature
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?
Identify the temperature that is equivalent to 95°F. Use this formula to convert the temperature
The temperature that is equivalent to 95°F - 35° C
We can convert from Fahrenheit to Celsius using the formula:
=> [tex]C = \frac{5}{9} (f - 32)[/tex]
Celsius to Fahrenheit using the formula:
=> [tex]F= \frac{9}{5} C + 32[/tex]
where
f = represents degrees Fahrenheit and
c = represents degrees Celsius.
In our case,
f = 95 and we want to find c then,
[tex]C = \frac{5}{9} (f - 32)[/tex]
[tex]C = \frac{5}{9} (95- 32)\\C = \frac{5}{9} (63)\\C = 7*5\\C = 35[/tex]
Thus, the correct answer is - 35° C
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You have an electromagnet that is not quite strong enough. What are three changed you could make to increase the strength
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
When vehicles meet on a steep, narrow road, not wide enough for two vehicles, which vehicle must yield the right-of-way?
A. The vehicle going uphill
B. The vehicle going downhill
C. The vehicle going slower
Answer: B. The vehicle going downhill
Explanation: The vehicle going huphill needs more force to move, while the vehicle moving downhill actually can be moved only by the gravity acceleration.
So when both cars meet, if the car going uphill loses momentum, the vehicle may not be capable to keep moving uphill after that, so is better that the car going downhill yields the right-of-way to the other car, that needs to preserve the momentum.
__________ constancy refers to the ability to understand that an object retains the same form even when viewed from a different angle.
A. Structural
B. Shape
C. Brightness
D. Color
The answer is Shape
Explanation:Shape Constancy is the tendency to perceive an object as having the same shape regardless of its orientation or the angle from which we view it. It is a term of Psychology. For example, the image of a dinner plate is elliptical, not circular, unless its surface is exactly at a right angle to our line of sight. But in the absence of all depth information, it is not possible to judge the true shape of any object.
Answer:
B. Shape
Explanation:
For the lever shown, a = 5 m and b = 2 m. What is the mechanical advantage of the lever?
What would happen to the earth if it orbited further away from the sun than it does now?
What besides mass and gravity , what other factor affects gravitational potential energy?
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.
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How does newton's first law of motion relate to galileo's concept of inertia?
Which type of foot PPE must you wear if electrical shock is ever a possibility with your job?