Answer:
The answer is V = 43.8cm³
Which current is produced in homes? magnetic voltage alternating direct
Answer:
Alternating
Explanation:
Edge 2020
what are two ways that machines make work easier?
Answer:
1. Machines can increase the speed of a task, allowing more work to be done in a shorter amount of time.
2. Machines can reduce the amount of physical effort required to complete a task, allowing for more efficient use of energy.
A student attaches a rope to a box and pulls the box up a ramp as shown below. The ramp has a rough surface. When
drawing the free body diagram for the box, the friction force should be directed:
O up and to the right
down and to the left
up and to the left
to the left
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three solid plastic cylinders all have radius 2.37 cm and length 6.42 cm. find the charge of each cylinder given the following additional information about each one.
Surface charge density: It is defined as the amount of charge per unit surface area of the space in two or three dimensions.
a. The surface charge density is = =19.9 × 10⁻¹¹C
b. The surface charge density is = 1.37 V 10⁻¹⁰C.
c. The volume charge density is = 1.73 × 10⁻¹²C
The formula gives it, σ=q/S
Here,
q is the charge and
S is the surface area.
Volume charge density: It is defined as the amount of charge per unit volume of the space in two or three dimensions. The formula gives it, p=q/V
Here,
q is the charge and
V is the volume.
(a) The surface charge density is given by,
σ=q/S …… (1)
Here,
q is the charge and
S is the total surface area of the cylinder.
The total surface area of the cylinders will be,
S = 2πr (h+r)
Here,
r is the radius and
h is the height of the cylinder.
Substitute 2.53 cm for r 5.64cm and for h in the above equation.
S= 2π (2.53cm) ( 1m/ 100cm) ((2.53cm) (1m/100cm) + (5.64cm) (1m/100cm))
=1.30 × 10⁻²m²
The charge on the first cylinder can be calculated by rearranging the equation (1).
q= σS
Substitute 15.3nC/m² for S and for σ in the above equation.
q=(15.3nC/m²) (10⁻⁹C/1nC) (1.30 × 10⁻²m²)
=19.9 × 10⁻¹¹C
The total surface area of the cylinder was calculated and then the expression of surface charge density which is, σ=q/S was rearranged to calculate the value of the charge on the cylinder.
(b) The surface charge density is given by,
σ=q/S …… (2)
Here,
q is the charge and
S is the curved surface area of the cylinder.
The curved surface area of the cylinders will be,
S = 2πrh
Here,
r is the radius and
h is the height of the cylinder.
Substitute 2.53cm for r and 5.64cm for h in the above equation.
S= 2π(2.53cm) (1m/100cm) (5.64cm) (1m/100cm)
=8.96 × 10⁻³m²
The charge on the second cylinder can be calculated by rearranging the equation (2).
q= σS
Substitute 15.3nC/m² for σ and 8.96 × 10⁻³m² for S in the above equation.
q= (15.3nC/m²) (10⁻⁹C/1nC) (8.96 × 10⁻³m²)
= 1.37 V 10⁻¹⁰C
(c) The volume charge density is given by,
p=q/V …… (3)
Here,
q is the charge and
V is the volume of the cylinder.
The volume of the cylinders will be,
V=πr²h
Here,
r is the radius and
h is the height of the cylinder.
Substitute 2.53cm for r and 5.64cm for h in the above equation.
V=πr²h
V=π((2.53cm) (1m/100cm))² (5.64cm) (1m/100cm)
The charge on the third cylinder can be calculated by rearranging the equation (3).
q= pV
Substitute 15.3nC/m³ for p and 1.13 × 10⁻⁴m³ for V in the above equation.
q = (15.3nC/m³) (10⁻⁹C/1nC) (1.13 × 10⁻⁴m³)
= 1.73 × 10⁻¹²C
The volume of the cylinder was calculated by the formula, V= πr²h
and then the expression of volume charge density which is, p=q/v
was rearranged to calculate the value of the charge on the cylinder.
Hence, The charge on the cylinder is 19.9× 10⁻¹¹C.
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your question is incomplete, most probably the complete question is :
Three solid plastic cylinders all have radius 2.53 cm and length 5.64 cm. Find the charge of each cylinder given the following additional information about each one. Cylinder (a) carries charge with uniform density 15.3 nC/m2 everywhere on its surface. Cylinder (b) carries charge with uniform density 15.3 nC/m2 on its curved lateral surface only. Cylinder (c) carries charge with uniform density 490 nC/m3 throughout the plastic.
the two ways in which you can increase the amount of work done
Answer:
Incresing force used and distance covered
No work is done if you push against the wall of a building.why?
Explanation:
Even though the man exerts force on the wall, the wall doesn't move . Work done= Force applied* displacement and since the displacement of the wall is zero., work done is also zero.
Define what velocity means.
Answer:
The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of an object's speed and direction of motion (e.g. 60 km/h to the north).
Pedro y Juan van a la escuela en bicicleta. Pedro vive a 5 km de distancia al este de la escuela, y Juan al oeste es decir -4 km. Si ambos hicieron un tiempo de 0.25 horas. Cuál es la velocidad de cada uno?
Answer:
Lo primero que hay que recordar es la relación:
Velocidad = Distancia/tiempo.
Para el caso de Pedro, el vive a 5km de la escuela (es decir, para llegar a la escuela, el debe recorrer -5km, entonces la distancia es -5km), y recorre esa distancia en 0.25 horas, entonces su velocidad es:
Velocidad = -5km/0.25hr = -20km/h
Esto significa que Pedro se mueve con una velocidad de -20km/h, lo que significa que se mueve hacia el oeste con un módulo de 20km/h
Para el caso de Juan, el vive a -4km de la escuela, entonces el tendrá que recorrer 4km para llegar a la escuela, y los recorre en 0.25 horas, entonces su velocidad sera:
Velocidad = 4km/0.25h = 16 km/h
Lo que significa que Juan tiene una velocidad de 16km/h hacia el este.
Which is an example of kinetic energy?
a. an archer's bow with the string drawn back
b.river water at the top of a waterfall
c. a Ferris wheel before it starts turning
d.a crumb falling from a table.
Answer:
it's a
Explanation:
Answer:
I believe its D!
Explanation:
Kenetic energy is motion
matching: one instance of entity (a) being associated with one other instance of another entity (b) = ____________
Matching: One instance of entity (a) being associated with one other instance of another entity (b) = One-to-One Relationship.
In database design and entity relationship modeling, a one-to-one relationship refers to a relationship between two entities where each instance of entity (a) is associated with exactly one instance of entity (b). This means that for every record or instance in entity (a), there is a unique and corresponding record or instance in entity (b).
The relationship is one-to-one because there is a strict pairing between the instances of both entities, and no duplication or multiple associations exist. This type of relationship is commonly used when there is a need to split data into separate entities to minimize redundancy or manage distinct attributes.
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The table shows data for the planet Uranus.
A 2 column table with 4 rows. The first column is labeled Quantity with entries, Escape velocity in kilometers per second, Gravitational acceleration in meters per second squared, Orbital velocity in kilometers per second, Length of day in hours. The second column is labeled Value with entries, 21.3, 8.7, 6.8, 17.2.
To the nearest whole number, how much would a 25.0 kg rock weigh on Uranus?
170 N | 218 N | 430 N | 532 N
Answer:
218 N
Explanation:
The weight of the object on Uranus W = mg' where m = mass of the object = 25.0 kg and g' = gravitational acceleration.
Since in the table, we are given different values, we look for the value of the gravitational acceleration because, that is the only variable there that can help us calculate the weight of the object.
From the table, the gravitational acceleration g' = 8.7 m/s².
So, the weight of the object W = mg'
= 25.0 kg × 8.7 m/s²
= 217.5 N
≅ 218 N
Answer:
B. 218 N
Explanation:
Edge 2020
A calorie is the amount of heat needed to raise the temperature of.
Answer:
one gram of water to one-degree Celsius.
Explanation:
the first ionization energy of c is 11.3 ev. the first ionization energy of si should be:
The first ionization will most probably be around 19-20 eV
As we know that, when the atom is in gas phase and if we want to remove the outermost electron from that atom, then the energy required to achieve this is known as first ionization energy
Since, we know that in silicon valence electrons are further from the nucleus than in carbon due to shielding effect of it's inner electrons
Also in it's valence shell silicon has one more electron than carbon, so because of all these reasons, Silicon will have higher first ionization energy than carbon
From the estimation, we can analyze that the first ionization energy of silicon will be around 8-9 eV higher than that of Carbon
Since, the first ionization energy of carbon is given as 11.3 eV
So, the first ionization energy of Silicon will be 11.3 + 8 = 19.3 eV
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the sketch shows the refraction and reflection for red and violet light rays inside a water drop that produces a primary rainbow. out of the colors listed below, which has the smallest index of refraction in water?
Refraction is the bending of light rays as they pass from one medium to another, such as air to water. The amount of bending that occurs depends on the speed of light in each medium, which is measured by the index of refraction. The higher the index of refraction, the slower light travels through that medium.
In the case of a rainbow, light enters a water droplet and undergoes both reflection and refraction before exiting the droplet as a rainbow. The different colors of light (red, orange, yellow, green, blue, indigo, and violet) have different wavelengths and therefore refract at slightly different angles. This causes the colors to separate and form a rainbow.
So, which color has the smallest index of refraction in water? The answer is red. This is because red light has the longest wavelength of all the colors, which means it bends the least when passing through a medium like water with a higher index of refraction. Violet light, on the other hand, has the shortest wavelength and bends the most, making it the color with the highest index of refraction in water.
In summary, the sketch shows the refraction and reflection of red and violet light rays inside a water droplet that produces a primary rainbow. Red has the smallest index of refraction in water because it has the longest wavelength and bends the least. Violet has the highest index of refraction in water because it has the shortest wavelength and bends the most.
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electrons are tiny particles with very small negative charges when two electrons are place near each other the electric force pushes them apart what does this tell you about the mass of an electron
Answer:
Explanation:
like charges repel each other if one group of electrons has more mass it will push the other smaller mass of electrons away
A planned high-speed train between Houston and Dallas will travel a distance of 386 kilometers in 5.40 × 10^3 seconds. What is the average speed of this train?
¡Hellow!
For this problem, first, lets convert the seconds in hours:
5,4x10³\(\rightarrow\) 5400
h = sec / 3600
h = 5400 s / 3600
h = 1,5
Let's recabe information:
d (Distance) = 386 km
t (Time) = 1,5 h
v (Velocity) = ?
For calculate velocity, let's applicate formula:
\(\boxed{\boxed{\textbf{d = v * t} } }\)
Reeplace according we information:
386 km = v * 1,5 h
v = 386 km / 1,5 h
v = 257,33 km/h
The velocity of the train is of 257,33 kilometers for hour.
Extra:
For convert km/h to m/s, we divide the velocity of km/h for 3,6:
m/s = km/h / 3,6
Let's reeplace:
m/s = 257,33 km/h / 3,6
m/s = 71,48
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As the frequency of the ac voltage across an inductor approaches zero, the inductive reactance of that coil.
As the frequency of the AC voltage across an inductor approaches zero, the inductive reactance of that coil increases.
Inductive reactance is a property of an inductor that opposes changes in the current flowing through it when an alternating current (AC) is applied. It is denoted by the symbol XL and is directly proportional to the frequency (f) of the AC signal.
The formula for inductive reactance is XL = 2πfL, where L is the inductance of the coil. As the frequency approaches zero (f → 0), the inductive reactance becomes:
XL = 2π(0)L = 0
Therefore, the inductive reactance becomes zero as the frequency approaches zero.
This can be understood intuitively by considering that at very low frequencies or DC (direct current), the inductor acts as a short circuit or a purely resistive element. The reactance component, which is related to the frequency, diminishes, leaving only the resistance component of the inductor.
As the frequency of the AC voltage across an inductor approaches zero, the inductive reactance of the coil decreases and eventually becomes zero. This behavior arises because at very low frequencies, the inductor behaves more like a resistive element. Understanding the relationship between frequency and inductive reactance is crucial in analyzing and designing circuits involving inductive components.
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if a frictional force of 100 n is applied to each side of the tires, determine the average shear strain in the rubber.
Without specific information about the dimensions and material properties of the rubber, it is not possible to accurately calculate the average shear strain.
What is the average shear strain in the rubber if a frictional force of 100 N is applied to each side of the tires?The given paragraph states that a frictional force of 100 N is applied to each side of the tires, and we need to determine the average shear strain in the rubber.
Shear strain is a measure of deformation or distortion that occurs when a force is applied parallel to a surface. It represents the change in shape of the material due to the applied force.
To calculate the average shear strain, we need to know the dimensions of the rubber and the material's properties. The shear strain can be determined using the formula: shear strain = (shear displacement) / (original length).
In this case, without specific information about the dimensions and material properties of the rubber, it is not possible to provide an accurate calculation or explanation of the average shear strain.
The shear strain depends on factors such as the thickness of the rubber, the nature of the material, and the specific force distribution.
To accurately determine the average shear strain in the rubber, more information about the dimensions and properties of the rubber would be required.
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A photon with energy 2.30 eV is absorbed by a hydrogen atom. A is 3
b) Find the speed of the electron released from the state in part (a) when it is far from the nucleus.
km/s
The speed of the photon has been obtained as 8.9 * 10^5 m/s.
What is the speed of the electron?We know that the energy of the photon would be converted to the kinetic energy of the photon s it is moving. We would now go ahead to obtain the energy in joule.
We now have;
Energy in joules = 2.30 * 1.6 * 10^-19
= 3.68 * 10^-19 J
Then we know that;
KE = 1/2mv^2
KE = kinetic energy
m = mass of the electron
v = speed of the electron
Then
v^2= 2KE/m
v = √2KE/m
v = √2 * 3.68 * 10^-19/9.11 * 10^-31
v = 8.9 * 10^5 m/s
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What are the intercepts of the graphed function?
Answer:
the intercepts of a graph are point at which the graph crosses the axes
The Hertzsprung-Russell diagram plots
stars according to what three stellar
properties?
The Hertzsprung-Russell diagram plots stars according to: the colour of stars (or spectral type) against their absolute magnitude (the observational HR diagram, also known as a colour-magnitude diagram) or the temperature of stars against their luminosity (the theoretical HR diagram).
What is Hertzsprung-Russell diagram ?The Hertzsprung-Russell diagram, also known as the HR diagram, HRD, or H-R diagram, is a scatter plot of stars that illustrates the correlation between the stars' absolute magnitudes or luminosities and their stellar classifications or effective temperatures.
The diagram, which was independently produced in 1911 by Ejnar Hertzsprung and in 1913 by Henry Norris Russell, marked a significant advancement in our understanding of star evolution.
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write a paragraph about the topic : bullying in schools
Answer:
Bullying in the schools has negative effects on individual students and on the school climate as a whole. Bullying can cause long-term problems for both the victims of bullying and the bullies themselves. To explore the effects of bullying on adolescents, we will define bullying, identify the characteristics of bullies and victims, outline the extent and consequences of bullying, and present resources for further information and assistance.
Bullying is any behavior that is initiated by one or more students against a victim or victims that causes physical or psychological intimidation. Bullying behaviors can be classified as either direct (such as teasing, threatening, hitting, or stealing) or indirect (such as rumor spreading or social isolation). Boys typically employed direct methods of bullying, while girls tend to use in direct methods. Either way, behaviors must occur repeatedly overtime to be classified as bullying.
Characteristics of Bullies and Victims
There are specific behaviors that bullies tend to exhibit. The bullies often need to feel powerful and in control. They may feel no remorse when they inflict injury and suffering on others. Bullies tend to defy authority and are likely to break school rules. They seem to have little anxiety and appear to possess high self-esteem. Students who come from homes characterized by physical punishment tend to be more likely to exhibit these types of behaviors.
Victims also tend to exhibit specific characteristics. They are often anxious, insecure, cautious, and have low self-esteem. Victims tend to be socially isolated, and may lack social skills and friends. Because they tend to be weaker than their peers, either physically or socially, victims rarely retaliate against bullies. Students who have close ties with their parents/guardians or who have overprotective parents/guardians are more likely to be victimized by bullies.
a cylinder with , and a diameter is being pulled by a string with a force . the cylinder rolls on a surface with a coefficient of friction of horizontally: a cable reel on a flat surface is pulled by a force at its center. friction exists between the reel and the surface. determine r, and the acceleration. is the cylinder slipping?
The radius of the cylinder is approximately 2.19 m, and the cylinder is experiencing a deceleration of approximately 1.86 m/s². Since the cylinder is decelerating and the force applied is less than the friction force, it is not slipping.
From the given information:
Mass of the cylinder, m = 5 kg
Moment of inertia of the cylinder, I = 12 kg·m²
Diameter of the cylinder, D = 0.5 m
Force applied, F = 25 N
Coefficient of friction, μ = 0.7
Radius of the cylinder, r = ?
To determine the radius (r) of the cylinder, we can use the relationship between moment of inertia (I) and mass (m) for a solid cylinder:
I = (1/2) * m * r²
Given I = 12 kg·m² and m = 5 kg, we can solve for r:
12 = (1/2) * 5 * r²
r² = 12 / (1/2) * 5
r² = 12 / 2.5
r² = 4.8
r ≈ √4.8
r ≈ 2.19 m
So, the radius of the cylinder is approximately 2.19 m.
Now, let's determine the acceleration of the cylinder. The force applied is given as F = 25 N. The friction force can be calculated using the equation:
Friction force = μ * Normal force
Since the cylinder is being pulled by the string, the normal force is equal to the weight of the cylinder, which is given by:
Weight = mass * acceleration due to gravity
Weight = m * g
Assuming a standard acceleration due to gravity of 9.8 m/s²:
Weight = 5 kg * 9.8 m/s² = 49 N
Friction force = μ * Normal force = μ * Weight = 0.7 * 49 N = 34.3 N
Now, we can calculate the net force acting on the cylinder:
Net force = Force applied - Friction force
Net force = 25 N - 34.3 N
Net force = -9.3 N
Since the net force is negative, indicating that the force applied is less than the friction force, the cylinder will experience a deceleration rather than acceleration. The magnitude of the deceleration can be calculated using Newton's second law:
Net force = mass * acceleration
-9.3 N = 5 kg * acceleration
acceleration = -9.3 N / 5 kg
acceleration = -1.86 m/s²
The negative sign indicates that the deceleration is in the opposite direction to the force applied, which means the cylinder is moving in the direction opposite to the applied force.
Hence, the radius of the cylinder is approximately 2.19 m, and the cylinder is experiencing a deceleration of approximately 1.86 m/s². Since the cylinder is decelerating and the force applied is less than the friction force, it is not slipping.
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The stars of the milky way are all near a great circle on the celestial sphere. This great circle.
The stars of the milky way are all near a great circle on the celestial sphere. This great circle is called milky circle.
Milky Way Galaxy, large spiral system consisting of several hundred billion stars, one of which is the sun.It takes its name from the Milky Way, the irregular luminous band of stars and gas clouds that stretches across the sky as seen from Earth.Although Earth lies well within the Milky Way Galaxy, astronomers do not have as complete an understanding of its nature as they do of some external star systems. Although most stars in the Galaxy exist either as single stars like the Sun or as double stars.Milky circle is the great circle in which all stars of milky way are present.To know more about galaxy visit:
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The stars of the milky way are all near a great circle on the celestial sphere. This great circle is called milky circle.
What is Milky Way Galaxy ?Milky Way Galaxy, large spiral system consisting of several hundred billion stars, one of which is the sun.It takes its name from the Milky Way, the irregular luminous band of stars and gas clouds that stretches across the sky as seen from Earth.Although Earth lies well within the Milky Way Galaxy, astronomers do not have as complete an understanding of its nature as they do of some external star systems.Although most stars in the Galaxy exist either as single stars like the Sun or as double stars.Milky circle is the great circle in which all stars of milky way are present.To know more about Milky Way visit: https://brainly.com/question/13956361
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A plumb bob hangs from the roof of a railroad car. The car rounds a circular track of radius 340 m at a speed of 94 km/h. At what angle relative to the vertical does the plumb bob hang
The plumb bob hangs vertically downwards when the railroad car is at rest. However, when the car moves in a circular track of radius 340 m at a speed of 94 km/h, it experiences a centrifugal force that pulls the plumb bob away from the vertical.
To find the angle relative to the vertical at which the plumb bob hangs, we need to use the formula:
tan(theta) = (v^2) / (g * r)
where:
theta = angle relative to the vertical
v = speed of the railroad car = 94 km/h = 26.11 m/s
g = acceleration due to gravity = 9.81 m/s^2
r = radius of the circular track = 340 m
Substituting the given values, we get:
tan(theta) = (26.11^2) / (9.81 * 340)
tan(theta) = 2.146
Taking the inverse tangent of both sides, we get:
theta = tan^-1(2.146)
theta = 64.7 degrees
Therefore, the plumb bob hangs at an angle of 64.7 degrees relative to the vertical when the railroad car rounds a circular track of radius 340 m at a speed of 94 km/h.
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Two metal balls A and B of negligible radius are floating at rest on Space Station Freedom between two metal bulkheads, connected by a taut nonconducting thread of length 2.00m. Ball A carries charge q, and ball B carries charge 2q. Each ball is 1.00m away from a bulkhead.
(a) If the tension in the string is 2.50 N, what is the magnitude of q?
(b) What happens to the system as time passes? Explain.
a) Given: The tension in the string, T = 2.50 N The separation between the balls, l = 2mLet the charge on the ball A be q, and that on the ball B be 2q. So, we have to find the value of q. So, the force of electrostatic repulsion between A and B can be calculated by Coulomb's law as:
\($$F = \frac{1}{4\pi \epsilon _0}\frac{q(2q)}{l^2} = \frac{q^2}{2\pi \ epsilon _0l^2}$$\) The net force on the system can be obtained by taking the vector sum of the electrostatic force and the tension in the string. Since the balls are floating at rest, the net force on them must be zero.
So, we can write:$$T + F = 0$$$$\ Right arrow \frac{q^2}{2\pi \epsilon _0l^2} = T$$$$\Right arrow q = \sqrt{\frac{2\pi \epsilon _0l^2 T}{}}$$Substituting the given values, we get:$$q = \sqrt{\frac{2\times 3.14 \times 8.85\times 10^{-12}\times 2^2\times 2.5}{}}$$$$\Right arrow
q = 1.18 \times 10^{-8} C$$ Therefore, the magnitude of q is 1.18 × 10⁻⁸ C.b) The two balls A and B carry like charges, so there will be an electrostatic force of repulsion between them.
As time passes, the charge on the balls does not change, so the tension and the separation between the balls also remain constant. Therefore, the system will remain in the same state of equilibrium and nothing else will happen to the system as time passes.
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Two identical cars are driving along the motorway. Car A is travelling at 50 km/h and Car B is travelling at 80km/h. Which car has the most drag acting on it?
Answer:
i think it is car B because the greater the speed, the greater the drag force acting on the vehicle
Explanation:
Please I need help with this ❤️ ?
Answer:
Compound 'A' C5H12 does not react with phenyl hydrazine. Oxidation of 'A' with K2Cr2o7,/H" gives B' (c5H10o). Compound 'B' reacts with phenyl hydrazine but does not give Tollen's test. The
What type of reproduction occurs when a cell divides to form two new cells?
a. autotrophic b. heterotrophic c. asexual reproduction d. sexual reproduction
Answer:
d. sexual reproduction
Explanation:
A single cell divides to make two cells and these two cells then divide to: we call this process "cell division" and "cell reproduction," and there are two ways cells divide—mitosis and meiosis. This is all part of sexual reproduction.
what is the probable origin of the dark colored features in this image of the surface of mars? it is about 20 km across.
The probable origin of the dark colored features in the surface of mars for about 20 kilometers across are dunes shaped by the wind.
Explanation:
Dunes are familiar features on Earth and they also occur on Mars, Venus, and Saturn's moon, Titan. What all these bodies have in common is an atmosphere, plus substantial amounts of loose sand-size particles. Of all the extraterrestrial dunes scientists know about, those on Mars are the most closely studied.
A dune is a heap of sand piled up and shaped by the wind. (Underwater dunes exist on Earth, but we can ignore these in regard to today's Mars.) The word "dune" implies a substantial size — at least several meters (yards) high. But small ripples of sand only a few centimeters (inches) high are made in the same way from the same materials. The difference lies mainly in the supply of particles and how much time the wind has had to work on them.
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