Delta means change usually
Answer: A) Change in velocity
Explanation:
USA test prep
ASAP PLS
If the amplitude of a wave is 2 feet, what is the Wave Height?
= 4 feet
Explanation;The height of the wave is defined as the elevation of the crest minus the elevation of the trough. or
The wave height is defined as the twice of the amplitude
It is given that the amplitude of the wave is 4 feet. The height of the wave is given as;
H = 2a
Where a is the amplitude of the wave.
Therefore, H = 4 feet.
When white light passes through a prism, a red light is least changed in direction? True or false
True because the picture below proves this....
* from which red color is least deviated and violet most.
* Hopefully this helps:) Mark me the brainliest:) !!
∞ 234483279c20∞
Yes, the statement is true. When white light passes through a prism, red light is the least deviated because it has the longest wavelength among the visible light spectrum. This dispersion phenomena breaks white light into its constituent colors.
Explanation:The statement 'When white light passes through a prism, red light is least changed in direction' is True. This is because when white light, which is made up of different colors or wavelengths, is refracted through a prism, it experiences dispersion. As a result, different wavelengths of light are bent by different amounts. This phenomenon occurs because different frequencies of light have different refractive indices for a given material. Therefore, each color follows a slightly different path through the prism. Red light has the longest wavelength among the visible light spectrum and is refracted or bent the least compared to other colors such as violet, which has the shortest wavelength and is refracted the most. This explains why when we observe the dispersion of white light through a prism, such as in Newton's rainbow experiment, we see red light emerge at the least deviated angle, and violet light at the most deviated angle.
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Please help-you need to fill in the blanks
a) 2 trains are moving towards each other along a straight line. To find the speed of one train relative to the other train you need to ............. their speeds.
b) 2 trains are moving in the same direction along a straight line. To find the speed of one train relative to the other train, you need to ............ their speeds.
Answer:
1 average 2 subtract.
Explanation:
a). add
b). subtract.
What is the motional kinetic energy of a 25kg
object moving at a velocity of 10m/s?
[tex]ke = \frac{1}{2} \times mv {}^{2} [/tex]
kinetic energy : ke
m : mass ( 25kg )
v : velocity ( 10 m/s )
[tex] \frac{1}{2} \times 25 \times {10}^{2} [/tex]
= 1250 (J )
My answer is 1250J. By doing 1/2 × 25 × 10²
A force of 5N and a force of 8N act to the same point and are inclined at 45degree to each other. Find the magnitude and direction of the resultant force.
Refer to the diagram attached (created with GeoGebra). Consider the 5 N force in two directions: parallel to the 8 N force and normal to the 8 N force.
[tex]\displaystyle F_{\text{1, Parallel}} = F_1 \cdot \cos{45^\textdegree} = \dfrac{5\sqrt{2}}{2}\;\text{N}[/tex].[tex]\displaystyle F_{\text{1, Normal}} = F_1 \cdot \sin{45^\textdegree} = \dfrac{5\sqrt{2}}{2}\;\text{N}[/tex].The sum of forces on each direction will be the resultant force on that direction:
Resultant force parallel to the 8 N force: [tex](8 + \dfrac{5\sqrt{2}}{2})\;\text{N}[/tex].Resultant force normal to the 8 N force: [tex]\dfrac{5\sqrt{2}}{2}\;\text{N}[/tex].Apply the Pythagorean Theorem to find the magnitude of the resultant force.
[tex]\displaystyle \Sigma F = \sqrt{{(8 + \dfrac{5\sqrt{2}}{2})}^2 + {(\dfrac{5\sqrt{2}}{2})}^2} = 12.1\;\text{N}[/tex] (3 sig. fig.).
The size of the angle between the resultant force and the 8 N force can be found from the tangent value of the angle. Tangent of the angle:
[tex]\displaystyle \dfrac{\Sigma F_\text{Normal}}{\Sigma F_\text{Parallel}} = \dfrac{8 + \dfrac{5\sqrt{2}}{2}}{\dfrac{5\sqrt{2}}{2}} \approx 0.306491[/tex].
Find the size of the angle using inverse tangent:
[tex]\displaystyle \arctan{ \dfrac{\Sigma F_\text{Normal}}{\Sigma F_\text{Parallel}}} = \arctan{0.306491} = 17.0\textdegree[/tex].
In other words, the resultant force is 17.0° relative to the 8 N force.
Which of the following best describes the frequency of a wave?
Since you didn't add any answer choices I will explain the frequency of a wave the best I can.
The frequency of a wave is the distance between one crest and another. Frequency can affect the energy of a wave. If the crests in a wave are close together, than the frequency of said wave is high as well as the energy. If they are far apart, than the frequency will be low and the energy will also be low.
Hope this helped.
Wave frequency is the number of waves that pass a fixed point in a given amount of time.
What is frequency?The number of vibrations counted per second is called frequency. A wave is a group of vibrations that are referred to as energy. The bottom node is known as the crest, and the top node is known as the trough.
The frequency of an alternating current is the number of full cycles per second. The hertz, also known as Hz, is the accepted unit of frequency. The frequency of a current is 1 Hz if one cycle is completed per second; 60 cycles per second equals 60 Hz.
A often utilized factor in relation to the wave is frequency. Let's say we need to determine the wave's frequency and the wave moves at a certain pace. The wavelength and velocity of the light wave are also used to calculate the number of cycles the wave has completed in one second. The frequency term is frequently taken into account in relation to the sound wave.
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Which device can be used to increase voltage from a source of direct current?
A. Generator
B. Electroscope
C. Induction coil
D. Mass spectrometer
Induction coil
hope this helps :)
Which statement below best describes the properties of solids? A. Solids have both definite shape and definite volume. B. Solids have definite volume but no definite shape. C. Solids have definite shape but no definite volume. D. Solids have no definite shape or volume.
The answer is A. Solids have both definite shape and denfinite volume.
The correct statement that describes the properties of solids is A. Solids have both a fixed shape and a fixed volume, resulting from the particles being in fixed positions and bound by strong intermolecular forces.
Among the statements given, the one that best describes the properties of solids is: A. Solids have both definite shape and definite volume. In the solid state, the particles that make up the material are in fixed positions relative to each other because the thermal energy is not sufficient to overcome the strong intermolecular forces that bind them. This result is that solids have a rigid and definite shape, and they also have a definite volume, which means they do not change volume or shape unless a force is applied that alters their structure.
Liquids, on the other hand, have a definite volume but no definite shape, assuming the shape of their containers. Gases fill their containers completely, expanding to fill the volume available and thus having neither a definite volume nor a definite shape.
How many of each component are shown in the diagram
Answer:
One battery, two resistors, two switches, three light bulbs
Explanation:
Each component is indicated with the following symbols:
- Battery: it is the one on the right, consisting of two longer lines and two shorter lines. It is the device that provides the electromotive force to the circuit
- Resistors: they are the devices on the bottom line, consisting of zig-zag lines. Resistors are pieces of circuit that resist to the flow of current in the circuit.
- Switches: they are labelled with a line with two dots at both ends. They can be opened/closed in order to stop/allow the flow of current in the circuit.
- Light bulbs: they are labelled with a circle filled with a X.
Answer:
A B D E
Explanation:
Bc I did the test
Explain how the mass of a planet affects the motion of the planet around the sun?
Answer:
The gravitational attraction of the Sun is what holds the planets in their elliptical orbits. So to explain this the mass effects the motion of the planets because the strength of gravitational force depends of the mass.
Explanation:
The mass of a planet affects the motion of the planet around the sun because mass is directly proportional to the gravitational force.
What is gravity?The force of attraction felt by a person at the center of a planet or Earth is called as the gravity.
Force of gravity between Sun and planet while moving in orbit is given by
F = GMm/R²
where M is the mass of Sun, m is the mass of any planet, G = gravitational constant = 6.67 x 10⁻¹¹ N.m²/kg² and R is the distance between two masses.
The weight of a person or object is determined by gravity. The gravitational attraction of the Sun holds the planets to move in their elliptical orbits.
Thus, the mass effects the motion of the planets because the strength of gravitational force depends of the mass of planet
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Two stellar science students are pushing a box, one on each side of the box. Kenny is pushing the box with a force of 10N to the left. Michael is pushing the box with the force of 15N to the right. Draw a force diagram. What is the net force? Is the force balanced or unbalanced?
Answer:
Unbalanced, 5N to the right.
Explanation:
Atmospheric refraction of light rays is responsible for which of the following effects? a. spherical aberration c. chromatic aberration b. mirages d. total internal reflection in a gemstone
Answer: b. mirages
Explanation:
A mirage is an optical illusion that occurs naturally due to refraction in the atmosphere. This phenomenon occurs especially in environments where the air exhibits large variations in its temperature, causing each of the layers with different temperatures to have a different index of refraction and therefore, the light rays will be diverted to the colder side.
Then, when this happens, displaced images of distant objects, or in the sky, are produced. In fact, sometimes it seems that distant objects are reflected on a liquid surface that is not real.
A 3-kilogram block slides along on a frictionless surface at 4 m/s north, and strikes an obstacle that exerts an impulse on the block of 6 N-s to the south. What is the speed of the block after the collision?
Answer:
2 m/s
Explanation:
The impulse exerted by the obstacle on the block is equal to the change in momentum of the block:
[tex]I=\Delta p = -6 Ns[/tex]
where we put a negative sign because the direction of the impulse is south, which is opposite to the initial direction of travelling of the block (north).
The change in momentum is also equal to
[tex]\Delta p = m (v-u)[/tex]
where
m = 3 kg is the mass of the block
v is the final velocity
u = +4 m/s is the initial velocity
Solving the equation for v, we find the final velocity of the block:
[tex]v=u+\frac{\Delta p}{m}=+4 m/s+\frac{-6 Ns}{3 kg}=+2 m/s[/tex]
and the positive sign means the direction is still north.
What is the force, in units of milliNewtons (mN), exerted on a wire that carries a current of 4.7 A when there is 3.5 cm of the wire in the magnetic field of strength 0.97 T and the wire is perpendicular to the direction of the magnetic field?
Answer:
160 mN
Explanation:
The force exerted on the wire is given by
[tex]F=BIL sin \theta[/tex]
where
B is the magnetic field strength
I is the current in the wire
L is the length of the piece of wire
[tex]\theta[/tex] is the angle between the direction of the field and the wire
In this problem:
B = 0.97 T
I = 4.7 A
L = 3.5 cm = 0.035 m
[tex]\theta=90^{\circ}[/tex]
Therefore, the force exerted on the wire is
[tex]F=(0.97 T)(4.7 A)(0.035 m)(sin 90^{\circ})=0.160 N=160 mN[/tex]
Please help me with homework
= 64 N/m
Explanation;According to Hooke's Law for a helical spring or an elastic material, extensional force is directly proportional to the distance the material has extended.
F = ke; where F is the extension force, k is the spring constant, and e is the distance extended.
Thus;
k = F/e
= 44N/0.69 m
= 63.768 N/m
= 64 N/m
What is a non example of temperature
We measure temperature of matters with a device called thermometer. There are three types of thermometer, Celsius Thermometer, Fahrenheit Thermometer and Kelvin Thermometer.
Non-examples of temperature include instances like inaccurately implying ratios in temperature, thinking an increase in internal energy always results in an increase in temperature, and misconceptions about absolute zero in temperature scales.
Explanation:A non-example of temperature could be simply understood as a situation or instance where temperature doesn't play a significant role, or where the notion of temperature as we usually perceive it, does not apply. For instance, the concept of ratio or multiplication in temperature such as saying 80 °C is four times as hot as 20 °C is a non-example, because there's no meaning to the ratio of 80 to 20 (or four to one) in the context of temperature. Another non-example is the assumption that increasing internal energy of a system necessarily increases its temperature; this is not always true. The temperature does not change when a substance changes from one phase to another, like during the melting of ice. This can be accomplished by adding heat or doing frictional work without changing temperature.
The concept of absolute zero, where there is zero molecular motion, is another perception which sometimes confounds the casual understanding of temperature, especially in cases like Celsius (C) and Fahrenheit (F) temperature scales where 0 degrees does not mean absence of heat because temperatures lower than zero exist and are in fact colder. Thus, these cases represent non-examples of common understanding of temperature.
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A common characteristic of sound waves is that they
A. Are created by vibrations
B. Travel in straight lines toward the source
C. Travel fastest through empty space
D. Move at the speed of light
A. Are created by vibrations
Explanation;Mechanical waves are waves which travel only through matter and involve the motion and vibration of particles of the matter they pass through. Sound waves are an example.Sound waves are longitudinal waves. Speed of sound is about 343 m/s (767 mi/h) in sea-level air at ordinary temperatures. Additionally, sound travels faster in liquids and solids than in gases.A common characteristic of sound waves is that they are created by vibrations. Sound is produced when an object or medium vibrates, causing molecules or particles in the surrounding medium to also vibrate. The correct option is option (A).
A common characteristic of sound waves is that they are created by vibrations. These vibrations are transmitted as mechanical waves through the medium, resulting in the propagation of sound.
Sound waves travel in a variety of directions depending on the source and surrounding conditions, so option (B) is not accurate in general.
Option (C) is incorrect because sound waves require a medium to propagate and cannot travel through empty space, such as a vacuum.
Option (D) is also incorrect because the speed of sound is much slower than the speed of light.
A common characteristic of sound waves is that they are created by vibrations. The correct option is option (A).
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Which of the following waves have the highest energy? A. Gamma Waves B. Microwaves C. Radio Waves D. Visible Light
A. Gamma waves have the highest
Gamma Waves have the highest energy in the given list, followed by X-rays, Ultraviolet, Visible Light, Infrared, Microwaves, and then Radio Waves. Their energy is high enough to damage biological cells
Explanation:In the electromagnetic spectrum, the energy of a wave is inversely proportional to its wavelength. The shorter the wavelength, the higher the energy they have. In this list, Gamma Waves have the shortest wavelength and therefore the highest energy.
Following Gamma Waves, are X-rays, Ultraviolet, Visible Light, Infrared, Microwaves, and then Radio Waves in terms of energy. Among these options, Gamma Waves definitely have the highest energy. The energy of Gamma Waves can be so high that they can cause damage to biological cells and are thus used in cancer therapy to destroy tumors.
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NEED HELP ASAP PLEASEEE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Which of the following is an example of work being done on an object?
A.
A man pushes a couch across the room.
B.
A prism scatters ultraviolet light into visible light.
C.
A box rests on the floor.
D.
Water in a pot changes into steam.
In the diagram above, which letter identifies an axle?
A.
X
B.
Z
C.
Y
D.
W
Which simple machine can be described as a shaft that is attached to the center of a wheel?
A.
lever
B.
inclined plane
C.
pulley
D.
wheel and axle
Usually, levers are used to reduce the input force needed to move an object. This is only possible when the input force acts over a long distance and the object moves a shorter distance.
However, sometimes levers are designed to increase the input force needed to move an object. Which of the following is most likely an example of this type of lever?
A.
a catapult
B.
a see-saw
C.
a wheelbarrow
D.
a crowbar
Answer:
work being done on an object.
Answer. A. A man pushes a couch across the room
diagram identifies an axle:
Answer: B. Z
simple machine described as a shaft at the center of a wheel:
Answer: D. Wheel and axle
Type of lever:
A. a catapult
Answer:
work being done on an object.
Answer. A. A man pushes a couch across the room
diagram identifies an axle:
Answer: B. Z
simple machine described as a shaft at the center of a wheel:
Answer: D. Wheel and axle
Type of lever:
A. a catapult
Explanation:
Which part of the wave has the highest frequency?
Answer:
The last part on the right side of the diagram
Explanation:
Im on plato and just got it right :)
The last part on the right end of the given wave has the highest frequency.
What are frequency and wavelength?The frequency can be defined as the number of oscillations of a wave in 1 second. The wavelength can be described as the distance between the two crests or troughs on a wave that is separated by a distance.
For periodic waves, media in which the wave speed is independent of frequency, therefore the frequency has an inverse relationship to the wavelength.
[tex]{\displaystyle f={\frac {v}{\lambda }}[/tex]
In electromagnetic waves in vacuum, then v = c, where c is the speed of light:
[tex]{\displaystyle f={\frac {c}{\lambda }}[/tex]
When monochromatic waves propagate from one medium to another, their frequency will remain the same.
Frequency can be defined as the number of occurrences of a repeating event per unit of time. Frequency can be measured in hertz (Hz) which is generally equal to one event per second.
Therefore, the part at the very right of the wave has the highest frequency.
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Which is an example of reflection
Final answer:
Reflection can be seen when light bounces off a body of water, when it reflects from a mirror, or even off rough surfaces like sidewalks, where the light is scattered rather than forming a clear image.
Explanation:
An example of reflection can be observed when looking at the surface of a body of water. From above, the water reflects light back into the air, providing us with the visible image of our surroundings. A familiar everyday experience is observing light reflection from a mirror, where light rays hit the mirror and bounce off at the same angle, forming a clear image. Surfaces like sidewalks also demonstrate reflection; the rough texture scatters the light in various directions, which is why we do not see a distinct image of the sun, but we still perceive the concrete due to reflected light.
A wave travels at a constant speed. How does the frequency change if the wavelength is reduced by a factor of 4
The product of (wavelength) x (frequency) is always the same number ... the wave's speed.
So if the wavelength is somehow reduced to 1/4 its original length, the frequency is immediately multiplied by 4 . That's the only way their product can remain the same.
The frequency increases by a factor of four when the wavelength is lowered by a factor of four.
What is frequency?Frequency is defined as the number of repetitions of a wave occurring waves in 1 second.
Frequency is given by the formula as,
[tex]\rm v = \lambda \times f[/tex]
If a wave travels at a constant speed the e frequency is inversely proportional to the wavelength.
if the wavelength is reduced by a factor of 4 then the frequency increases by a factor of 4.
Hence, the frequency increases by a factor of 4.
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Block A has a mass of 14 kg, block B has a mass of 12 kg, and angle alpha equals 19°. What is the tension in the wire that connects blocks A and B?
44 N
38 N
33 N
41 N
Given that,
mass of block A = 14kg
mass of block B = 12kg
angle alpha equals = 19°
Formula to find tension in the wire connecting blocks A and BTension in wire connecting weight of object A and B is due to weight of block B
= mgsin19
due to slope we will take horizontal components of weight, mg
= 12(9.81)sin(19)
= 38.3
Determine the velocity of the running man with respect to car A.
Answer:
A) -55 km/
hr
Explanation:
Answer: A) -55 km/h
Explanation: The running man is traveling at -55 km/hr with respect to Car A. If the man were standing still, the car would be passing at 50. Since he is traveling at 5 in the opposite direction, that direction is positive, to him. His velocity now adds to the car velocity (50 + 5), but negative to account for the opposite direction.
Hope this helps!
How are the current and resistance related when the voltage of a circuit is constant
Final answer:
At a constant voltage, current and resistance are inversely related as per Ohm's Law, with current decreasing as resistance increases, and vice versa.
Explanation:
When the voltage in a circuit is held constant, the current flowing through the circuit is inversely proportional to the resistance. This relationship is encapsulated by Ohm's Law, which states that the current (I) is equal to the voltage (V) divided by the resistance (R), mathematically represented as [tex]I = \frac{V}{R}[/tex].
As such, if the resistance in the circuit increases while the voltage remains unchanged, the current will decrease. Conversely, if the resistance decreases, the current will increase.
The resistance is influenced by factors such as the material of the conductor and its temperature. At a constant temperature, the resistance remains steady regardless of the changes in voltage or current.
Therefore, when considering Ohm's Law in a practical scenario, such as household electrical circuits, resistance plays a critical role in determining the current that flows through an appliance.
List 3 differences between the American League and the National League in Baseball?
Question ~ What's the difference between the American and National Baseball Leagues?
Answer ~ Major League Baseball is divided into two leagues with long and storied histories. See more sports pictures
Most people know that Major League Baseball is divided into two separate leagues: 1The American League and the National League. The National League, formed in 1876, is the older of the two leagues that make up the professional Major League Baseball organization in the United States and Canada. The main difference in the two is that the American League uses the designated hitter rule to replace pitchers during at-bats, and the National League does not.
Alexander Cartwright, an architect and sportsman in New York City, is widely recognized as the father of modern organized baseball. He was instrumental in founding the first organization devoted to playing baseball, the Knickerbocker Base Ball Club, in 1845. He wrote 20 rules about the field layout and how the game was played. The most important one was that players had to be tagged or forced out rather than having the ball thrown at them [source: Dickey]. Of course, the rules were modified as the game evolved, but Cartwright gave us the essence of baseball.
Sorry if it's a bit too long and the word with the D isn't supposed to be a bad word in there sorry about that xD This took me a while. (It's not the Bad word with a D btw ;-; just don't mind that.) I'll put the part you need in bold so you know where they are. I don't know the others like the other 2 differences. But I tried my best. I hope this helps my hands really hurt from typing ;-;
Three differences between the American League and National League in Baseball include the use of the DH rule by the AL but not traditionally by the NL, the former impact of the All-Star Game on World Series home-field advantage, and the integration of Interleague play.
Explanation:The American League (AL) and the National League (NL) are the two leagues that make up Major League Baseball (MLB). Historically, there have been several differences between them. Here are three distinct differences:
The DH rule: The American League uses the Designated Hitter (DH) rule, allowing a player to bat in place of the pitcher without affecting defensive alignments. The National League, until 2022, typically did not use the DH, requiring pitchers to bat for themselves.All-Star Game: The outcome of the MLB All-Star Game between the AL and NL used to determine home-field advantage in the World Series. This practice was in place from 2003 to 2016, with the league winning the All-Star Game securing home-field advantage.Interleague play: Interleague play was adopted by MLB in 1997, allowing AL and NL teams to compete against each other during the regular season. Initially, this was far more common for AL teams than for NL teams, but it has since become a regular part of the schedule for both leagues.These differences contribute to unique strategies and fan experiences within each league.
whats 46/50 as a percent?
92 percent because you multiply it by 2
I'm pretty sure that would be a A.
Help with this plz!!!
The answer is:
It is virtual and behind the mirror.
Mirrors produce images, either virtual or real.
Virtual images are produced when the image is behind the mirror. Real images are formed when they image is produced in front of the mirror.
So look at the image produced. It's small and found in behind the mirror. This means that it is a virtual image. How do I know that its behind the mirror?
When you look at the diagram, the front side of the mirror is the blue side. This is a convex mirror.
One charge is decreased to one-third of its original value, and a second charge is decreased to one-half of its original value. how will the electrical force between the cahrges compare to the original force
it will decrease to 6 times the original force
it willnincrease to 36 times the original force
it will decrease to one-sixth the original force
it will decrease to one-thirty-sixth the original force
I just had this question on my test, the answer is C.
Answer:
The new force will decrease to one sixth the original value.
Explanation:
It is given that,
One charge is decreased to one-third of its original value, and a second charge is decreased to one-half of its original value.
Let, [tex]q'_1=\dfrac{1}{3}q_1[/tex] q₁ is the charge 1
[tex]q'_2=\dfrac{1}{2}q_2[/tex] q₂ is the charge 2
Initially, the electrical force between the charges is given by :
[tex]F=k\dfrac{q_1q_2}{r^2}[/tex]...........(1)
Let F' is the new force i.e.
[tex]F'=k\dfrac{q'_1q'_2}{r^2}[/tex]
So,
[tex]F'=k\dfrac{\dfrac{1}{3}q_1\times \dfrac{1}{2}q_2}{r^2}[/tex]
[tex]F'=\dfrac{1}{6}k\dfrac{q_1q_2}{r^2}[/tex]
[tex]F'=\dfrac{1}{6}F[/tex] (from equation 1)
Hence, the new force will decrease to one sixth the original value.
In the diagram the solid green line represents earths rotational axis and the dashed red line represent the magnetic field axis which diagram accurately shows earths magnetic field
Answer: the answer is B.
Explanation:
Answer:
Option B)
Explanation:
As we know that Earth's magnetic poles are inclined at some angle with the rotational axis of the Earth.
So here the magnetic poles must be inclined at some angle with the rotational axis of Earth
Now we know that magnetic field of earth originates from the south pole of earth and terminate near the north pole of earth
So magnetic poles of earth are opposite to the geographic pole of earth
So magnetic field will originate near the south pole and go near the north pole of earth
so here correct answer must be Option B)