In psychology research, the laboratory experiment has long been regarded as the "gold standard."
This is so that causality can be clearly established and because only laboratory experiments can distinguish between cause and effect.
What is a laboratory?
The evidence suggests that Pythagoras of Samos, a well-known Greek philosopher and scientist, had a laboratory in his home.
This laboratory was set up by Pythagoras, who experimented with sound tones and string vibration.
In a painting by Albert Edelfelt from 1885, Louis Pasteur is shown comparing a note in his left hand to a bottle containing a solid in his right hand, without wearing any personal protective equipment.
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however, they did not measure stellar parallaxâthe stars did not appear to move back and forth at all over the course of a year. what is the most likely reason for this apparent lack of motion?
The lack of apparent motion of the stars is due to the vast distances involved, and not to any shortcomings in the observation techniques or instruments used such as stellar parallax.
What is Stellar Parallax?Stellar parallax is the apparent shift in the position of a nearby star relative to more distant background stars as observed from Earth, caused by the Earth's orbit around the sun. In other words, as the Earth moves in its orbit around the sun, the perspective from which we view nearby stars changes, causing those stars to appear to move slightly against the more distant background stars.
The amount of this apparent shift is directly proportional to the distance of the star from the Earth. The closer the star, the greater the parallax. By measuring the parallax of a star, astronomers can determine its distance from the Earth with a high degree of accuracy.
Stellar parallax provides one of the most direct and reliable methods for determining the distances to nearby stars and is a key tool in the study of the structure and evolution of the Milky Way galaxy and the universe as a whole.
The most likely reason for the apparent lack of motion of the stars is due to the great distances between Earth and the stars. Stellar parallax is the apparent shift in the position of a star as observed from two different points in Earth's orbit, such as from opposite sides of the Earth's orbit around the sun. This apparent shift is caused by the change in the observer's perspective as the Earth moves.
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What is the distance between the points (5, 14) and (18, 3)? clear check 6. 9 units 17. 03 units 28. 6 units 290 units.
The distance between the points (5, 14) and (18, 3) is 17.03 units
To find: PQ=?distance between two points = [tex]\sqrt{(x2-x1)^{2} +( y2-y1)^{2} }[/tex]
PQ = [tex]\sqrt{(18-5)^{2} +( 3-14)^{2} }[/tex]
PQ = 17.03 units
How do I find the distance between 2 points?
Discover the distance formula, a Pythagorean theorem application, to determine the separation between two places. To get the separation between any two points, we may rewrite the Pythagorean theorem as d=((x 2-x 1)2+(y 2-y 1)2).
Hence 17.03 units is a correct answer.
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what happens to the temperature of the gas during an isobaric expansion?
With an increase in gas volume, the gas's temperature must also rise. Temperature and volume changes result in work and an internal energy shift.
An illustration of an isobaric processBoiling water into steam or freezing water into ice are two examples of isobaric processes. A gas either expands or contracts during the process to maintain constant pressure, and as a result, the net work done by the system or on the system is determined.
What does "isobaric vs. adiabatic" mean?An adiabatic process where no heat is added to or removed from the system. an isobaric process, in which there is no change in the pressure of the system. the system's volume remains constant throughout an isochoric process.
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the lowest note on a grand piano has a frequency of 27.5 hz . the entire string is 2.00 m long and has a mass of 400 g . the vibrating section of the string is 1.90 m long.
To tune this string properly, 357.21 N force of tension is required.
What is a simple definition of frequency?Frequency is the number of waves that pass a specific area in a defined amount of time. As a result, the frequency is 2 per second if a wave travels through in half a second. If it takes 1/100 of an hour, the frequency is 100 times per hour.
To calculate the tension needed to tune the string,
we can use the formula:
Tension = (frequency × wavelength)² × mass / (4 ×length) where:
frequency is the lowest note frequency, which is 27.5 Hz
wavelength is the length of the vibrating section, which is 1.90 m
mass is the mass of the string, which is 400 g (or 0.4 kg)
length is the total length of the string, which is 2.00 m
When the values are added to the formula, we obtain: Tension = (27.5 Hz × 1.90 m)² × 0.4 kg / (4 × 2.00 m)
= 357.21 N
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Question:
The lowest note on a grand piano has a frequency of 27.5 Hz. The entire string is 2.00 m long and has a mass of 400 g. The vibrating section of the string is 1.90 m long. What tension is needed to tune this string properly?
By what amount does the sound intensity decrease when the distance to the source triples?.
The sound intensity, or sound power, decreases by a factor of nine (9) when the distance to the source triples.
What is sound intensity?Sound intensity is the rate of energy transfer per unit area and per unit time in the form of sound waves. It can be measured in units of watts per square meter (W/m2). Sound intensity is proportional to the square of the sound pressure level and is inversely proportional to the distance from the source. Sound intensity decreases with increasing distance from the source and increases with the sound pressure level.
This is due to the inverse-square law, which states that the sound intensity decreases inversely proportional to the square of the distance from the source. This means that as the distance from the source increases, the sound intensity decreases by the square of that distance. In this case, when the distance is tripled, the sound intensity decreases by a factor of nine (9).
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the time it takes for the celestial sphere to rotate once relative to the earth is called
The time it takes for the celestial sphere to rotate once relative to the earth is called synodic day.
What is meant by synodic day?Synodic day or synodic rotation period is the period for a celestial object to rotate once in relation to the star it is orbiting which is the basis of solar time.
Synodic day is the period it takes for planet to rotate once in relation to body it is orbiting. For Earth, synodic day is known as a solar day, and it is about 24 hours long. Reason that the synodic month is longer than the sidereal month is because the earth orbits the sun at the same time that the moon goes through its phases.
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What is 106 °F in °C?
106 °F is equivalent to 41.11 °C
Temperature conversion from Fahrenheit to Celsius is done using the formula °C = (°F - 32) × 5/9. In this case, we can plug in the given temperature of 106 °F and solve for °C.
Here is the step-by-step process:
1. Subtract 32 from the Fahrenheit temperature: 106 - 32 = 74
2. Multiply the result by 5: 74 × 5 = 370
3. Divide the result by 9: 370 ÷ 9 = 41.11
Therefore, 106 °F is equivalent to 41.11 °C.
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Claire flips a coin 4 times. Using the table, what is the probability that the coin will show tails at most once? a 2-column table with 5 rows. Column 1 is labeled number of tails with entries 0, 1, 2, 3, 4. Column 2 is labeled probability with entries 0. 06, 0. 25, 0. 38, 0. 25, 0. 6. 0. 06 0. 25 0. 31 0. 69.
The probability that the coin will show tails at most once is 0.31.
What is the probability ?The probability of any particular outcome is the measure of the likelihood that the outcome will occur. It is usually expressed as a number between 0 and 1 (where 0 shows impossibility and 1 shows certainty). The higher the probability of an event, the more certain that the event will occur. Probability is quantified as a number between 0 and 1, where, loosely speaking, 0 indicates impossibility and 1 indicates certainty. The higher the probability of an event, the more likely it is that the event will occur.
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The probability that the coin will show tails at most once is 0.31.
What is the probability ?How likely a certain outcome is to occur is determined by its probability. Usually, it is indicated by a number between 0 and 1. (where 0 denotes impossible and 1 denotes certainty). The chance of an occurrence increases as its likelihood increases. A number between 0 and 1 is used to represent probability, with 0 generally denoting impossibility and 1 generally denoting certainty. The chance of an occurrence increases as its likelihood increases.
probability that the coin will show tails at most once = P(x = 0) + P(x = 1)
= 0. 06 + 0. 25
= 0.31
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If you roll two fair six-sided dice, what is the probability that at least one die shows a 3 33?.
The probability of rolling a 3 on a single six-sided die is 1/6, or 16.7%.
What is probability?Probability is a mathematical study of outcomes in uncertain situation it is used to describe the like would have an event occurring and it can be expressed as the number between 0 to 1 probability is used to quantify the uncertainty associated with any given event it helps us understand how likely it is that something will happen and it can be used to make prediction about futures even probability theory is it of modern statistic and is widely used in fields such as finance economics and science.
Therefore, the probability of rolling at least one 3 when rolling two six-sided dice is 2 × 1/6, or 33.3%. This is because the probability of rolling a 3 on one die is independent of the probability of rolling a 3 on the other die. This means that the probability of rolling at least one 3 is equal to the sum of the probabilities of rolling a 3 on each of the two dice (1/6 + 1/6 = 2/6). As a result, the probability of rolling at least one 3 when rolling two six-sided dice is 33.3%.
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4 more to go you got this
answer:
Lol DIY
explanation
Just DIY
A bear walks 10 km west in two hours in search of fresh berries. She then walks 3. 5 km east in one hour. What is her average velocity?.
In two hours, a bear travels ten kilometers west in quest of more fruit. Then, in an hour, she covers 3. 5 km to the east. The typical Average velocity is 3.25 km/hr .
The change in position or displacement (x) divided by the time intervals (t) during which the displacement happens is the definition of average velocity. Based on the direction of the displacement, the average velocity might either be positive or negative.
The formula V = D/t is used to compute average velocity, where V stands for average velocity, D for total displacement, and t for total time. The displacement of an object over time is its average velocity. We divide the distance traveled by the amount of time to determine an object's average speed. We are aware that speed is a vector.
here d = 10 km
t = 2hours
distance at second time (z) = 3.5 km
Average velocity = ∆x/∆t
Average velocity = (10-3.5) / 2
Average velocity = 3.25 km/hr
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Can you replace the glass plate in a microwave?
Yes, it is possible to replace the glass plate in a microwave. The glass plate is a removable part of the microwave, and it can be replaced if it becomes damaged or broken.
To replace the glass plate, follow these steps:
Determine the size and shape of the glass plate: Before purchasing a replacement glass plate, you will need to determine the size and shape of the original glass plate. This information can typically be found in the owner's manual for the microwave or by measuring the diameter of the plate.
Purchase a replacement glass plate: Once you have determined the size and shape of the glass plate, you can purchase a replacement plate from a store or online retailer.
Remove the old glass plate: Open the microwave and carefully remove the old glass plate from the rotating base. Be sure to handle the broken glass carefully to avoid injury.
Install the new glass plate: Place the new glass plate onto the rotating base of the microwave, aligning it with the guides or notches to ensure that it rotates properly.
Test the microwave: Close the microwave and run it for a short period of time to ensure that the new glass plate is rotating properly and that there are no issues.
It is important to note that not all glass plates are interchangeable between microwaves, as different models may have different size and shape requirements. Be sure to check the manufacturer's recommendations and specifications before purchasing a replacement glass plate.
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most comets have short periods and orbit close to the ecliptic plane.True or False
False. Most comets actually have long periods and orbit at an inclination to the ecliptic plane, meaning they don't follow the same plane as the planets in our solar system.
Comets are small, icy bodies that originate in the outer reaches of the solar system, beyond the orbit of Neptune. They are made up of ice, dust, and rocky materials, and they typically have highly elliptical orbits that bring them close to the sun at their closest approach, called perihelion, and far away from the sun at their farthest point, called aphelion.
Comets with long periods take many years, even centuries or millennia, to complete a single orbit around the sun. They are thought to come from the Oort cloud, a region of icy bodies that surrounds the solar system at a distance of up to 100,000 astronomical units (AU) from the sun. As they approach the sun, the heat causes the ice to sublimate, releasing gas and dust that forms the characteristic coma and tail of the comet.
On the other hand, comets with short periods have orbits that last less than 200 years and are believed to originate in the Kuiper Belt, a region of icy bodies beyond Neptune that extends from about 30 to 50 AU from the sun. Some short-period comets have nearly circular orbits that are close to the ecliptic plane, while others have more eccentric orbits that take them high above or below the plane.
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how does a compass use magnetism to show direction?
The magnetic field is a zone where the force is active along imaginary lines. From the south magnetic pole to the north magnetic pole, this force has an effect on all magnetized objects, such as the needle of a compass. Under the effect of Earth's magnetic field, the needle always points toward the north magnetic pole.
What is magnetism ?When magnets attract or repel one another, they exert a force known as magnetism. The movement of electric charges is what generates magnetism. Atoms are little building blocks that make up all substances. There are electrons in every atom, which are charged particles.
The main purpose of a compasses is to find direction on the ground during navigation. This functions because the Earth's magnetic field resembles that of a bar magnet. North and south are indicated by the compass needle pointing in the direction of the Earth's magnetic field.
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A drag racer starts from rest and accelerates at 10 m/s2 for the entire distance of 400 m (1/4 mile). What is the velocity of the race car at the end of the run?.
89.4 m/s is the velocity of the race car at the end of the run.
Define acceleration.
The definition of acceleration is the speed at which velocity varies with respect to time. Since acceleration has both a magnitude and a direction, it is a vector quantity. Additionally, it is the first derivative of velocity with respect to time or the second derivative of position with respect to time.
The definition of velocity is the rate of displacement. The direction of a body or object's movement is defined by its velocity. There are only two ways to accelerate: changing your speed or changing your direction, or changing both. This is because velocity is both a speed and a direction.
Given,
vi = 0; a = 10; d = 400; vf = ?
vf²= vi² + 2ad
vf² = 0 + 2(10)(400)
vf² = 8000
vf = 89.4 m/s
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how to calculate vector projection?
Vector projection calculated by multiplying the magnitude of the two vectors by the cosecant of the angle between them.
Vector projection is a technique used in mathematics and physics to determine the component of a vector that lies in a specific direction. Given two vectors, the vector projection of one vector onto the other represents the length of the component of the first vector that lies in the direction of the second vector. The vector projection is calculated by taking the dot product of the two vectors and dividing them by the magnitude of the second vector.
The resulting value is then multiplied by the unit vector of the second vector to obtain the vector projection. Vector projection is useful in a variety of applications, including physics, engineering, and computer graphics. In physics, vector projection is used to determine the component of a force that acts in a specific direction. In engineering, vector projection is used in structural analysis to determine the forces acting on a structure. In computer graphics, vector projection is used to simulate the effects of lighting and shading on three-dimensional objects.
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Based on what you learned about light, select all of the correct statements from the following list. -High frequency photons carry more energy than long wavelength photons.
-All electromagnetic waves travel at the speed of light.
-Light can act both as a wave and a particle.
-A photon is a particle of light. X-rays and gamma rays are long wavelength photons.
-Different types of electromagnetic radiation are fundamentally different types of waves.
-The only type of electromagnetic radiation that is actually considered light is visible light.
The correct statements include:
High frequency photons carry more energy than long wavelength photons.All electromagnetic waves travel at the speed of light.Light can act both as a wave and a particle.A photon is a particle of light.option A, B, C, D
What are the incorrect statements about electromagnetic waves?
The Incorrect statements include:
Different types of electromagnetic radiation are fundamentally different types of waves. (All types of electromagnetic radiation are fundamentally the same type of wave but have different frequencies and wavelengths.)
The only type of electromagnetic radiation that is actually considered light is visible light. (All types of electromagnetic radiation are considered light, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.)
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Answer: A B C D
Explanation: k12 I had this quiz
I’m not sure between A or B, can someone pls help me out?
Answer:
Its the Answer A.
Explanation:
makes the most sense
What is 165 Centimeters in Feet and Inches?
The value is 5.4 in feet and 65 inches
What is a conversion factor?A conversion factor is a ratio of equivalent measurements used to convert a quantity from one unit of measurement to another. Conversion factors are often used in mathematics and science to ensure that quantities are expressed in consistent units, which makes it easier to perform calculations and make comparisons.
For example, consider a situation where you want to convert a quantity from inches to centimeters. The conversion factor for this conversion would be:
1 inch = 2.54 centimeters
This is the conversion factor that we used to obtain then values above.
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the common 9 volt battery imparts how much energy to one coulomb of charge?
9 joules of energy in one coulomb of charge.
The energy of the battery means the amount of energy given by the battery.
The energy that a battery imparts to a charge can be calculated using the formula:
E = V * Q
where,
E is the energy in joules, '
V is the voltage in volts, and
Q is the charge in coulombs.
For a 9 volt battery, the energy imparted to one coulomb of charge can be calculated as:
E = 9 V * 1 C
E = 9 J/C
One joule per coulomb is equal to one volt.
Hence,
9 J/C = 9 V
9 volt battery, the energy imparted to one coulomb of charge is 9 V.
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at what speed is the wind turbine stopped so that damage does not occur?
Speed at which the wind turbine stopped so that damage does not occur : 25 meters per second.
What is the cut off speed of wind turbine?When anemometer registers wind speeds higher than 55 mph, then it triggers the wind turbine to automatically shut off. Wind turbines work on simple principle: instead of using electricity to make wind, wind turbines use wind to make electricity.
A modern turbine will generate electricity when wind speeds reach six to nine miles per hour (mph), known as cut-in speed. Turbines will shut down if the wind is blowing too hard (roughly 55 miles an hour) to prevent the equipment damage.
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why are some planets made out of gas
Planets that are made mostly of gas are known as gas giants. The four outer planets in our solar system, Jupiter, Saturn, Uranus, and Neptune, are all gas giants.
What are planets?These planets are made primarily of hydrogen and helium, with trace amounts of other elements. Planets that are made mostly of gas are known as gas giants. The four outer planets in our solar system, Jupiter, Saturn, Uranus, and Neptune, are all gas giants.
Gas giants are thought to have formed farther away from the Sun than the terrestrial planets (like Earth), where temperatures were low enough for hydrogen and helium to condense into solid ice. In these colder regions, there was a lot more gas and dust available to form planets, which led to the formation of gas giants.
As gas giants formed, their large masses and strong gravitational forces allowed them to capture even more gas and dust from the surrounding space, which contributed to their growth. The extreme pressures and temperatures in the cores of these planets also cause the hydrogen to undergo a phase transition, turning into metallic hydrogen that behaves like a liquid and contributes to the planet's magnetic field.
It's worth noting that gas giants are not entirely made of gas - they also have solid cores, although the exact size and composition of these cores is not well understood. Some gas giants may also have liquid layers between the gas and the core and may have complex weather patterns on their surfaces due to the interactions of different layers of gas moving at different speeds.
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which thermometer is used to measure surface temperatures?A. Surface probeB. Thermocouple with immersion probeC. Infrared thermometerD. Time-temperature indicator
The thermometer that is commonly used to measure surface temperatures is the infrared thermometer. This type of thermometer uses infrared radiation emitted by the surface to measure its temperature without requiring direct contact.
Infrared thermometers work by detecting the intensity of infrared radiation emitted by the surface and converting it into a temperature measurement. They are quick and easy to use, and they can measure the temperature of a surface from a safe distance without physically touching the surface.
Surface probes and thermocouples with immersion probes are typically used to measure the temperature of liquids, gases, and other materials that can be easily accessed. Time-temperature indicators are used to monitor the temperature of perishable goods during storage and transportation, but they are not typically used to measure surface temperatures.
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Find the equivalent capacitance of the combination. Assume that C1 = 11.8μF, C2 = 4.25 μF, and C3 = 3.56 μF.
The equivalent capacitance of the combination when connected in series is 1.66 μF and the equivalent capacitance of the combination when connected in parallel is 19.61 μF.
The capacitance C₁ is given as 11.8 μF.
The capacitance C₂ is given as 4.25 μF.
The capacitance C₃ is given as 3.56 μF.
If the capacitors are connected in parallel, the equivalent capacitance, C eq₁ is calculated as,
C eq₁ = C₁ + C₂ + C₃
C eq₁ = 11.8 μF + 4.25 μF + 3.56 μF = 19.61 μF
If the capacitors are connected in series, the equivalent capacitance, C eq₂ is calculated as,
1/C eq₂ = 1/C₁ + 1/C₂ + 1/C₃
1/C eq₂ = 1/11.8 + 1/4.25 + 1/3.56
1/C eq₂ = 0.085 + 0.235 + 0.281
1/C eq₂ = 0.601
C eq₂ = 1.66 μF
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What type of evidence does cosmic background radiation provide about the origins of the universe?.
It is confirmed by the origins of the cosmos that the early universe was once quite hot.
What kinds of things emit radiation?Radiation is the term used to describe energy that a source emits. Sunlight or heat from the sun, radiofrequency from an oven, X rays from an X-ray tube, and gamma rays from radioactive materials are a few examples.
The source of radiationIt can be created artificially or it can come from unstable atoms that decay radioactively. Energy waves or charged particles are the two ways that radiation leaves its source. There are various types of radiation, and each one has unique characteristics and effects.
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Why does the indicator change color in acid-base titration?
The indicators have a chemical structure that can absorb light( have a color) under certain pH conditions and either change color or come tintless under other pH conditions.
This typically occurs due to a change in protonation of the functional group( special side chain) of the patch. Let's look at an illustration of thymol blue index, C27H30O5S. In the figure, there are three structural comformations that differ in two locales( indicated in red) as to whether there's a bound hydrogen or not. The presence of the hydrogens change the wavelength( s) at which the emulsion absorbs light, so there are different colors associated with each conformation. Each conformation also exists within a given pH range, meaning they change color at a specific pH range or point.
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18. After chemical weathering, what is true about the chemical makeup of the weathered rock?
A. It is different than that of the original rock.
B. It is the same as the original rock.
C. It is more affected by mechanical weathering.
D. It could either be changed or stay the same.
The true statement is about the chemical makeup of the weathered rock is "It is different than that of the original rock.
option A.
What is chemical weathering?Chemical weathering is a process that involves the breakdown of rocks and minerals through chemical reactions with the surrounding environment. This process occurs due to the interaction of rock minerals with water, atmospheric gases, and organic acids, which can lead to the breakdown of the mineral structure of the rock.
Chemical weathering involves the breakdown of rocks and minerals through chemical reactions with water, oxygen, and other substances in the environment. As a result of these reactions, the chemical makeup of the weathered rock can be altered, and it may have different physical and chemical properties than the original rock.
Therefore, option A is the correct answer.
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When a car goes around a corner at 20 mph, why do we say it accelerates?The car is accelerating because of the velocity is constantThe car accelerates because it's going 20 mphCars always accelerate when they are in motionThe car is accelerating because it's changing direction
When a car goes around a corner at 20 mph, (D) it is accelerating because it's changing direction. The direction of the velocity which is a vector is changing so the it accelerates.
What is acceleration?An acceleration is a rate of change in velocity of an object with respect to time. It can be expressed as
a = Δv/Δt
Where
a = accelerationΔv = change in velocityΔt = change in timeA car goes around a corner at 20 mph. Find the reason why it is accelerates!
We know that an object accelerates when it has a change in velocity. The magnitude of the velocity of the car doesn't change, but the direction does.
A velocity is a vector which has both magnitude and direction. While the direction of the car is changing around a corner, the velocity also changes. Hence, with a change in velocity, we say car is accelerating.
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Two balloons of different mass hang from strings near each other. You charge them about the same amount by rubbing each balloon with wool.
Part B: Compare the angles of the threads with the vertical. Mass 1 Angle is 57. Mass 2 Angle is 122.
If m1 = m2, then Ï1 < Ï2
If m1 < m2, then Ï1 <Ï2
If m1 < m2, then Ï1 = Ï2
If m1 > m2, then Ï1 < Ï2
If m1 < m2, then Ï1 < Ï2
What will be the angles of the threads with the vertical. Mass 1 Angle is 57?
The angle between the thread and the vertical (Ï) is determined by the ratio of the weight of the balloon to the electrostatic force on the balloon, which is proportional to the amount of charge on the balloon.
If two balloons have different masses but are charged to the same amount, the heavier balloon will experience a larger gravitational force, and the angle between its thread and the vertical will be smaller. In this case, if m1 < m2, then Ï1 < Ï2.
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what optional wires-x connection cable kit is available for the yaesu ftm-300dr?
The Yaesu FTM-300DR's optional wires-X connection cable kit is the SCU-39. The cables and adapters needed to use the wires-X digital communication mode and link the transceiver to a PC are included in this kit.
WIRES-X Yaesu : What is it?WIRES-X. An Internet communication system called WIRES (Wide-coverage Internet Repeater Enhancement System) increases the range of amateur radio communication. In WIRES-X, the wireless communication is connected to the Internet through the use of an amateur node station acting as an access point.
What will WIRES-X require of me?Requires a transceiver with the Yaesu C4FM Portable Digital Node capability (FT5D, FT3D, FT2D, FTM-400XD, FTM-300D, FTM-200D, FTM-100D: as of 8/2021 or Firmware update, FTM-400D: Requires Firmware update), a USB connection cable, and a computer with the WIRES-X software and WIRES-X.
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