Which statement best describes a primary source?
A. The source is written by the person who conducted the
experiment.
B. The source is written by an expert in the field.
C. The source is compiled from other sources.
D. The source is filled with mathematical equations.

The most useful visual aid to represent the growth of different plants within same time duration is a bar graph. The vertical bars in the plot can effectively visualise the growth of each plant with respect to time.

A bar graph is a tool to visually represent and analyse the growth or progress in anything with respect to the time. It consist of two axis  x and y where, y  be the growth percentage and x axis is for the time at which the growth is measured.

Vertical bars are used to compare each component under study and each bar can given different colors to easily identify different components or samples under study.

Here, the four plants can be represented by four bars with different colors. The growth of each plant can be analysed then from the height of the vertical bars against the time duration at which the growth is measured.

To find more on bar graph, refer here:

https://brainly.com/question/13298277

#SPJ2

In developmental psychology, there are many major differences in schemes and assimilation between a preoperational thinker (preschool years) and a sensorimotor thinker (infancy).

Developmental psychology is a subfield of psychology that focuses on the examination of how people evolve and develop throughout their lives. Physical, cognitive, and socioemotional development are just a few of the components of human development that are examined in this field of research.

The main differences in schemes and assimilation between a preoperational thinker (preschool years) and a sensorimotor thinker (infancy) can be summarized as follows:

To learn more about developmental psychology, refer to:

https://brainly.com/question/15650981

#SPJ4

The major differences are, Schemes,Assimilation,Object Permanence and  Egocentrism

The major differences in schemes and assimilation for a preoperational thinker (preschool years) as compared to a sensorimotor thinker (infancy) are:

1. Schemes: In the sensorimotor stage, the child's schemes are based on sensorimotor actions and perceptions, such as grasping and mouthing objects. In the preoperational stage, the child's schemes become more mental and symbolic, such as using words and images to represent objects.

2. Assimilation: In the sensorimotor stage, the child's assimilation is based on the physical actions and objects in their environment. In the preoperational stage, the child's assimilation is more based on their own mental representations of objects and concepts.

3. Object Permanence: In the sensorimotor stage, the child develops the concept of object permanence, meaning they understand that objects exist even when they are out of sight. In the preoperational stage, the child's understanding of object permanence becomes more advanced and they can imagine objects in different locations or situations.

4. Egocentrism: In the preoperational stage, the child is more egocentric and has difficulty understanding other people's perspectives or beliefs. In the sensorimotor stage, the child is not yet capable of being egocentric as they do not yet have the mental capacity for such cognitive processes.

Overall, the preoperational stage marks a significant shift in a child's cognitive development, as they begin to develop more complex and abstract mental processes.

To learn more about the Object Permanence, click on this -

brainly.com/question/30638795

#SPJ11

Answer:

168

Explanation:

56 x 3

have a nice day

Car A has the same mass as car B:

Step 1

Diagram

When the two cars collide, your car pushes on the other car. By Newton's third law, that car pushes on your car with the same force, but in the opposite direction. This force causes you to slow down.

Step 2

The momentum of a moving object is equal to its mass multiplied by its velocity.

Thus, a fast-moving car has more momentum than a slow-moving car, if they have the same mass and the smae speed, they will have the same momemtum, A force on an object changes the object's momentum where momentum is mass times velocity.

so, the answer is

Car A has the same mass as car B:

If the image formed by the spherical mirror is real, we can use the mirror equation and magnification formula to find the radius of curvature of the mirror,

the height of the image, and determine whether the image is upright or inverted.

The mirror equation is given by:

1/f = 1/v - 1/u

Where:

f is the focal length of the mirror,

v is the image distance (distance of the image from the mirror),

u is the object distance (distance of the object from the mirror).

The magnification formula is given by:

magnification = height of the image / height of the object = -v/u

Given:

Height of the object (h) = 3.20 mm = 0.32 cm

Object distance (u) = 20.0 cm

Image distance (v) = -60.0 cm (negative sign indicates that the image is formed on the opposite side of the object)

Let's calculate the radius of curvature (R) first:

Using the mirror equation, we have:

1/f = 1/v - 1/u

1/f = 1/(-60.0 cm) - 1/20.0 cm

1/f = -1/60.0 cm - 1/20.0 cm

1/f = (-3 - 9)/180.0 cm

1/f = -12/180.0 cm

f = -180.0 cm / 12

f = -15.0 cm

The radius of curvature (R) is twice the focal length, so:

R = 2 * f

R = 2 * (-15.0 cm)

R = -30.0 cm

The height of the image (h') can be calculated using the magnification formula:

magnification = h' / h

-60.0 cm / 20.0 cm = h' / 0.32 cm

-3 = h' / 0.32 cm

h' = -3 * 0.32 cm

h' = -0.96 cm

The negative value for the magnification indicates that the image is inverted.

Therefore, for the case where the image is real:

The radius of curvature of the mirror is -30.0 cm (concave mirror).

The height of the image is -0.96 cm.

The image is inverted.

(b) For the case where the image is virtual, we can use the same formulas to find the radius of curvature, height of the image, and determine its orientation.

Height of the object (h) = 3.20 mm = 0.32 cm

Object distance (u) = 20.0 cm

Image distance (v) = +60.0 cm (positive sign indicates that the image is formed on the same side as the object)

Using the mirror equation:

1/f = 1/v - 1/u

1/f = 1/60.0 cm - 1/20.0 cm

1/f = (3 - 9)/180.0 cm

1/f = -6/180.0 cm

f = -180.0 cm / -6

f = 30.0 cm

The radius of curvature (R) is twice the focal length:

R = 2 * f

R = 2 * 30.0 cm

R = 60.0 cm

Using the magnification formula:

magnification = h' / h

+60.0 cm / 20.0 cm = h' / 0.32 cm

3 = h' / 0.32 cm

h' = 3 * 0.32 cm

To know more about mirror equation refer here

https://brainly.com/question/31097794#

#SPJ11

Process 1-2: Constant-pressure expansion at 1 bar from V1 = 0.5m3 to V2 = 2m3Process 2-3: Constant volume at 2 barProcess 3-4: Constant-pressure compression to 1m3Process 4-1: Compression with pV-1 = constant

The PV diagram of the gas contained within a piston-cylinder assembly undergoing four processes in series are as shown in the figure below:

Pressure and volume values at each numbered state of the gas contained within a piston-cylinder assembly undergoing four processes in series are given as below:

Process 1-2:Pressure at point 1 is 1 bar, and volume at point 1 is V1 = 0.5m3Pressure at point 2 is 1 bar, and volume at point 2 is V2 = 2m3Process 2-3:

Pressure at point 2 is 1 bar, and volume at point 2 is V2 = 2m3Pressure at point 3 is 2 bar, and volume at point 3 is V3 = 2m3Process 3-4:

Pressure at point 3 is 2 bar, and volume at point 3 is V3 = 2m3Pressure at point 4 is 1 bar, and volume at point 4 is V4 = 1m3Process 4-1:

Pressure at point 4 is 1 bar, and volume at point 4 is V4 = 1m3Pressure at point 1 is 4 bar, and volume at point 1 is V1 = 0.5m3 (pV-1 = constant)

to know more about Pressure refer here:

https://brainly.com/question/29341536#

#SPJ11

The statement "in a rotating rigid body, some points can have the same velocity" is true because there are certain points on the body called instantaneous centers of rotation where the velocity of different points on the body is the same, but the direction of their velocity may differ.

In a rotating rigid body, different points on the body will have different velocities because they are at different distances from the axis of rotation. However, there are certain points on the body called instantaneous centers of rotation where the velocity of different points on the body is the same, but the direction of their velocity may differ.

The instantaneous center of rotation is the point that has zero velocity and is the point about which the rigid body appears to be rotating. This concept is important in analyzing the motion of mechanisms and machines. Understanding the concept of the instantaneous center of rotation can help in predicting the motion of different parts of a machine or mechanism. In summary, it is true that in a rotating rigid body, there are certain points that can have the same velocity, but the concept is limited to the instantaneous centers of rotation.

Learn more about instantaneous centers of rotation here: https://brainly.com/question/32098446

#SPJ11

Sabemos todo material tiene asociado un coeficiente de difracción n.

De tal forma que la velocidad de una onda electromagnetica que viaja a travez de dicho material, será:

v = c/n

donde c es la velocidad de la luz.

Con la información dada, podremos concluir que el coeficiente de difracción del medio Q es dos veces el del medio P.

Ahora veamos como llegamos a esto:

Sabemos que en el medio P, la onda recorre una distancia 8*D en un tiempo 4*T

entonces la velocidad de la onda en el medio P es:

\(V_p = \frac{8*D}{4*T} = 2*\frac{D}{T}\)

Mientras que en el medio Q, recorre una distancia 4*D en un tiempo 4*T, por lo que la velocidad en el medio Q será:

\(V_Q = \frac{4*D}{4*T} = \frac{D}{T}\)

Podemos ver que:

\(V_P = 2*V_Q\)

Reescribiendo las velocidades como el cociente entre la velocidad de la luz y el correspondiente coeficiente de difracción obtenemos:

\(\frac{c}{n_P} = 2*\frac{c}{n_Q} \\\\n_Q = 2*n_P\)

Es decir, podemos concluir que el coeficiente de difracción del medio Q es dos veces el del medio P.

Si quieres aprender más sobre el tema, puedes leer:

https://brainly.com/question/11779790

Answer:

It is not a uniform velocity, because his velocity increases for 5 m every second (acceleration = 5m/s2), meaning his velocity always changes.

When he starts at rest, his velocity is 0 m/s. But in 1 second later, his velocity is already 5m/s. At 2 seconds, his velocity will be 10 m/s.

The ability of people to grow personally is highlighted by the humanistic psychology viewpoint.

In opposition to psychoanalytic theory and behaviorism, the humanistic perspective gained popularity in the middle of the 20th century. It highlights how healthy people develop and a person's innate desire for self-actualization and creativity. The humanistic perspective seeks to understand a person as a complete rather than just via one particular component of their personality. It is a subfield of psychology that deals with the notion of being wholly original and distinctive. A school of thought or philosophy known as "psychological perspective" is one that would help someone comprehend someone else's conduct.

Learn more about psychology here-

https://brainly.com/question/10027381

#SPJ9

Image C is a convex lens.An optical lens is made up of two spherical surfaces is convex lens.Its surfaces are curved outwards.

An optical lens is made up of two spherical surfaces is convex lens The lens is called a biconvex lens or simply convex lens if those surfaces are curved outwards.

Converging lens is another name for it. It's because it brings all the light rays that are parallel to the primary axis together at the focus point (F).

The picture created by a convex lens is always real and inverted. The produced image is virtual and erect when the item is positioned between the focus and the optical center of the lens.

Hence image C is a convex lens.

To learn more about the convex lens refer to the link;

https://brainly.com/question/1604692

Answer:

C

Explanation:

Answer:troposphere, stratosphere, mesosphere and thermosphere and exosphere

Explanation:

Hi there!

On a horizontal circular track with friction, the net force acting in the horizontal direction is:

∑F = Fκ, or the force of kinetic friction.

We know that ΣF = Mv²/r, so:

Mv²/r = Fκ

Plug in the given values to solve:

(1750)(35²)/80 = Fκ

Thus:

Fκ = 26796.875 N

Answer: v=1,56(m/s)

Explanation: Called: g(Gravity acceleration) =10\(m/s^{2} \\\)(or 9,8\(m/s^{2}\))

                                 h=1,2m  ;   t=1,3s

Because the coin fell freely, the velocity is calculated by the formula:

v=\(\sqrt{2gh}\)  (1)

besides, you have time to touch the bottom of the water is 1,3s:

t=\(\sqrt\frac{2g}{h} }\) (2)

(1) and (2) => v=1,56 (m/s)

The rotational kinetic energy and moment of inertia of the hollow rod are greater. Both should have the same moment of inertia and the same mass.

Option A is correct.

The rotational kinetic energy will be \(\frac{1}{2}\) Iω² , since the rotational kinetic energy depends on its moment of the inertia .

Conclusion be, Both the hollow rod and single rod have the same mass and will be having same moment of inertia as

                                     I =  ∑ mr²                  ∑ overall mass

Hence , The rotational kinetic energy and moment of inertia of the hollow rod are greater.

Both have identical kinetic energies. The blocks have the same gravitational potential energy at the top because they start from the same height. Along the slope, there is no energy loss. Hence, they have a similar measure of motor energy at the base.

Learn more about rotational kinetic energy :

brainly.com/question/30459585

#SPJ4

Answer:

20Amp

Explanation:

Using the transformer formula

Vs/Vp = Ns/Np = Ip/Is

Vs/Vp = Ip/Is

Vp is the primary voltage = input voltage

Vs is the secondary voltage = output voltage

Ip is the current in the primary coil

Is is the amount of current in the secondary coil.

If the transformer doubles its input voltage Vp, its output voltage Vs will be

decreased by 2 but the output current will be doubled

Given the input current Ip = 10A, the current in the secondary coil (output current) will be doubled i.e Is = 2(10) = 20A

The current in the secondary coil be "50 A". To understand the calculation, check below.

According to the question,

Current in primary coil, \(I_{in}\) = 10 A

We know the relation,

Power = \(V_{in} I_{in}\) = \(V_{out} I_{out}\)

then,

→ \(V_{in} I_{in}\) = \(V_{out} I_{out}\)

By substituting the values,

   \(V_{in}\) × 10 = 2 \(V_{in} I_{out}\)

By applying cross-multiplication,

           10 = 2 \(I_{out}\)

         \(I_{out}\) = \(\frac{10}{2}\)

                = 5 A

Thus the response above is correct.

Find out more information about current here:

https://brainly.com/question/24858512

The pressure inside the droplet formed from the coalescence of the two water droplets is approximately 24 N/m², also known as 24 Pascal (Pa).

To determine the pressure inside the droplet formed from the coalescence of two water droplets, we can apply the principle of energy conservation. When the two droplets merge, the total energy of the system remains constant, which allows us to equate the initial potential energy of the two droplets with the final surface energy of the merged droplet.

The potential energy of a droplet is given by the formula:

PE = 4/3 * π * r^3 * ρ * g,

where r is the radius of the droplet, ρ is the density of water (approximately 1000 kg/m³), and g is the acceleration due to gravity (approximately 9.8 m/s²).

Let's calculate the initial potential energy of the two droplets separately:

For the 1 mm droplet:

PE1 = 4/3 * π * (0.001 m)^3 * 1000 kg/m³ * 9.8 m/s².

For the 2 mm droplet:

PE2 = 4/3 * π * (0.002 m)^3 * 1000 kg/m³ * 9.8 m/s².

The sum of the initial potential energies of the two droplets is:

PE_initial = PE1 + PE2.

Now, after coalescence, the surface area of the merged droplet can be calculated as:

A = 4 * π * r^2,

where r is the radius of the merged droplet. In this case, the radius will be the sum of the radii of the original droplets.

r_merged = 0.001 m + 0.002 m.

Next, we equate the initial potential energy of the two droplets to the final surface energy of the merged droplet:

PE_initial = γ * A,

where γ is the surface tension of water (approximately 0.072 N/m).

Solving for the pressure inside the droplet, we have:

Pressure = γ / r_merged.

Plugging in the values, we get:

Pressure = 0.072 N/m / (0.001 m + 0.002 m).

Pressure = 0.072 N/m / 0.003 m.

Pressure ≈ 24 N/m².

Learn more about pressure here:

https://brainly.com/question/27897600

#SPJ11

The required resistance of the copper wire when the resistivity, diameter and length of the wire are specified is calculated to be 129.94 × 10⁻⁴ ohm.

The resistivity ρ of the copper wire is given as 1.7 × 10⁻⁸ ohm-m.

The diameter d of the wire is given as 0.2 cm = 0.2 × 10⁻² m

The length l of the wire is given as 2.4 m.

The relation between resistance, resistivity, length and diameter is

R = ρ l/A

where,

R is resistance

ρ is resistivity

l is length

A is area

Area A = πd²/4 = π(0.2 × 10⁻²)²/4 = π(0.04 × 10⁻⁴)/4 = 0.0314 × 10⁻⁴ m

Putting the values into the equation,

R = ρ l/A = (1.7 × 10⁻⁸)(2.4)/(0.0314 × 10⁻⁴) = 129.94 × 10⁻⁴ ohm

Thus, the required resistance is calculated to be 129.94 × 10⁻⁴ ohm.

To know more about resistance:

https://brainly.com/question/29161387

#SPJ4

Answer:

Mode = Millie

Explanation:

In statistics, the mode is the most frequently occurring value in a set, or, in this case, the most frequent name.

We see Millie 4 times

Joshua 3 times

Lena 1 time

Holly 1 time

Oscar 1 time

And Finn 1 time

Since the name, "Millie", is the most frequent name in the set, that is the mode.

Condensation warms us because airborne water molecules that impact our bodies give up some of their kinetic energy to us.

What is kinetic energy?

Kinetic energy is the energy of motion. It is the energy that a moving item possesses.It is typically measured in joules and is equal to the work done to accelerate the object from its rest state to its current state. Kinetic energy can be found by multiplying the mass of an object by its velocity squared, divided by two. The kinetic energy of an object increases as its velocity increases.Kinetic energy exists in both linear and rotational forms. Linear kinetic energy is the energy of an object moving in a straight line, while rotational kinetic energy is the energy an object has due to its spinning or rotating motion.

To learn more about kinetic energy

https://brainly.com/question/8101588

#SPJ4

Answer:

Explanation: as,

v=f∧

v=200×10³×1.5×10³

v=2.7×10^7ms⁻¹

The velocity of the radio waves is 3 × 10⁸ ms⁻¹.

A radio station frequency = 200 KH

wavelength = 1.5 km

         Radio waves in the electromagnetic spectrum has the longest wavelength and it will always be below 300GHz. The radio waves can be generated with acceleration through some charged particles. Only through the transmitter via antenna the radio waves can gets transmitted. Radio waves can be used in all the electronic devices as mobile phones, radio communication, radars and navigations.

                               V = f λ

            Velocity,  v = ( 200 × 10³ ) × ( 1.5 × 10³ )

                               = ( 300 × 10⁶ )

                             v = 3 × 10⁸ ms⁻¹.

Hence, the velocity of the radio waves is 3 × 10⁸ ms⁻¹.

Learn more about the radio waves,

https://brainly.com/question/21995826

#SPJ2

Explanation:

Remember

  V = IR       which is    V/I = R      120 v / .5 A = 240 Ω

The words that complete the blanks are; carbon dioxide; warming. Option 1

The term volcanic eruption has to do with a situation in which molten magma suddenly bursts out of the earth and may solidify to give rise to the emergence of rocks. We know that rocks are the solid parts of the earth hat may occur above or below the earth's crust. During a large volcanic event. It is common that carbon dioxide is evolved into the atmosphere.

To complete the sentence; One of the major events that contributed to Snowball Earth was the series of large volcanic eruptions that occurred 700 million years ago in what is now Canada. These eruptions caused carbon dioxide particles to get trapped in the atmosphere. The particles blocked incoming solar radiation, which had a strong  warming effect on the planet.

Learn more about volcanic eruption:https://brainly.com/question/1622004

#SPJ1

Answer:

Explanation. analysis, inference, and evaluation.help you to solve your problem as well as by using it you can develop scientific and critical thinking skills among students

Answer:

Initial velocity, U = 4.5m/s

Explanation:

Given the following data;

Final velocity, v = 12m/s

Time, t = 5 seconds

Acceleration, a = 1.5m/s²

To find the initial velocity, we would use the first equation of motion.

\( V = U + at\)

Where;

V is the final velocity.

U is the initial velocity.

a is the acceleration.

t is the time measured in seconds.

Substituting into the equation, we have;

12 = U + 1.5*5

12 = U + 7.5

U = 12 - 7.5

Initial velocity, U = 4.5m/s

Answer: evaporation.

Explanation: It soaks up moisture from soil in a garden for example, as well as the biggest oceans and lakes. The water level will decrease as it is exposed to the heat of the sun. (rewrite in your own words)

Answer:

Explanation:

C

In charging by induction, a charged object is brought near an object without touching it. The presence of the charge object induces electron movement and a polarization of the object. Then conducting pathway to ground is established and electron movement occurs between the object and the ground. During the process, the charged object is never touched to the object being charged.

The rate at which the force is doing work on the object is 710 watts.

To calculate the rate at which the force is doing work on the object, we need to use the formula for work:

Work = Force × Distance × cos(θ)

where θ is the angle between the force and the direction of motion. In this case, the object starts from rest, so the angle between the force and the direction of motion is 0 degrees (cos(0) = 1).

Net force (F) = 142 N

Mass of the object (m) = 26.0 kg

Distance (d) = 5.00 m

First, we calculate the magnitude of the force:

F = ma

where a is the acceleration of the object. Since the object starts from rest, the initial velocity (u) is 0, and we can use the equation:

v^2 = u^2 + 2ad

where v is the final velocity.

Since the object starts from rest, the equation simplifies to:

v^2 = 2ad

Solving for v:

v = √(2ad)

v = √(2 × 142/26.0 × 5.00)

v ≈ 5.18 m/s

Now, we can calculate the rate at which work is done:

Work = F × d × cos(0)

Work = 142 N × 5.00 m × 1

Work ≈ 710 joules

Since work is the energy transferred per unit time, the rate at which work is done, or power (P), is given by:

Power = Work / time

However, the time is not given in the question. Therefore, we cannot calculate the exact power value.

To learn more about Mass click here:

brainly.com/question/11954533

#SPJ11