(A) Experiments use one type of statistical test; correlational methods use a different type of statistical test
Correlational research:
A non-experimental research method known as correlational analysis measures two variables and evaluates the statistical relationship (also known as the correlation) between them with little to no effort to control unrelated variables. There are a variety of factors to consider when deciding whether to perform an experiment or a correlational study by researchers interested in statistical correlations between variables. First off, they either don't think the statistical relationship is causative or aren't interested in causality. Remember that the two main objectives of science are to describe and predict; the correlational research approach enables researchers to accomplish both of these objectives.Experimental research:
Experimental research is a term used to describe a study that closely resembles a scientific research methodology. A hypothesis, a controlled variable, and variables that can be measured, computed, and compared make up this structure.The utilization of controlled conditions in experimental research is vital. The facts that the researcher gathers will either confirm or disprove the theory.Difference between experimental and correlational methods:
You alter an independent variable and track its impact on a dependent variable in an experimental design. Other factors cannot affect the outcomes because they are under control. You measure variables in a correlational design without changing any of them.
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A cyclist coasts down a hill at 10 m/s. What does 10 m/s describe? Question 2 options: acceleration distance speed velocity
Answer:
speed
Explanation:
meters per second
Select the correct answer.
Which of these statements best fits the description of social change?
OA.
It is a harmful change in the evolution of a civilization,
OB. It is the change in pattern of human interactions and social structure.
OC. It is an organized and rational movement that has long-lasting effects.
OD. It is a change that occurs at an individual level.
Answer:
OB. It is the change in pattern of human interactions and social structure.
this could be the best from my opinion
A Bicycle is turned upside down the front wheel is running,where will the valve stop
The valve will stop when the wheel stops.
How can the wheel stops?
It can be done either applying the force manually or let the natural friction force work.The force can be applied manually by pulling up the brakes.The other way by which it stop is :
When we ride on a bicycle, we rotate the pedals, which in turn rotate the chainrings, which rotate the rear sprocket, hence, making the rear wheel to move forward. This rotation brings in angular speed and angular acceleration.The friction is applied from the ground to stop it from slipping. Here, the forces working are the rotational and the frictional along with angular acceleration and speed. When the bicycle is upside down, the frictional force from the ground becomes zero. The chain rings also don’t control the front wheel. The angular acceleration will be opposed by some force. Here, the frictional force that will act will be from the air and the inertia is applied to the rotational motion of the wheel which is now in the air and not on the ground. Once the friction from air is greater than angular motion, the wheel stop automatically.To know more about angular motion, refer : https://brainly.com/question/14723674
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Which part of the
electromagnetic wave
travels side to side?
A. electrical
B. magnetic
C. sound
The electric field vector of the electromagnetic waves always travel from side to side.
Energy, which is a measure of one's ability to accomplish work, comes in various forms and can change from one to another. Cells and waters behind a dam are instances of retained or potential energy. Kinetic energy is represented by moving objects. When charged particles, such as protons and electrons travel, they generate electromagnetic fields, which convey the sort of energy known as electromagnetic waves, or light. Electromagnetic waves move energy and motion over space by altering electric and magnetic fields. Maxwell's formulas, which constitute the basic equations of electrodynamics, are solved by EM waves. EM waves do not require a medium to move; they can pass across empty space. One form of electromagnetic wave is sinusoidal plane waves. Although not all electromagnetic radiation are sine plane waves, all electromagnetic waves may be thought of as linear superpositions of sine plane waves flowing in any direction.
The part of the electromagnetic wave which travels side to side is electrical.
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Answer: magnetic
Explanation: i got it right.
What is Chromatography?
Chromatography is a laboratory technique for separating a mixture into its components.
What is Chromatography?
This is a laboratory technique for separating mixture. The mixture is dissolved in a liquid solvent (gas or liquid) called the mobile phase, which passes it through a system (column, capillary tube, plate, or sheet) to which the material is attached, called the stationary phase. Because different constituents of a mixture have different affinities for the stationary phase and are retained for different periods of time depending on their interaction with its surface, the constituents move with different apparent velocities in the moving fluid, causing them to separate. The separation is based on the differential partitioning of the mobile and stationary phases. Subtle differences in the partition coefficient of the compound result in differential retention in the stationary phase and thus affect the separation.
Chromatography can be analytical or preparative . The reason of analytical chromatography is to separate the components of a mixture for later use and then form of purification.This process is associated with higher costs due to the manufacturing method. Analytical chromatography is usually performed on smaller amounts of material and aims to determine the presence of analytes or measure their relative proportion in a mixture. The two types are not mutually exclusive.
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A proton is released in a uniform electric field, and it experiences an electric force of 1.86x10-14 N toward the south. Find the magnitude and direction of the electric field.
The magnitude and direction of the electric field is 1.05×10^5N/C
The Electric Field is described as the electric force per unit charge.
E=[tex]\frac{F}{q}[/tex]
Here, F is an electric force,E is the Electric Field and q is a charge. charge is measured in coloumb.
For finding the magnitude, the expression can be use as follows,
E=[tex]\frac{F}{q}[/tex]
now put all the values given
F= 1.86x10^-14 N
q=1.6×10^-19C
E= 1.86x10^-14 N÷1.6×10^-19C
E=1.05×10^5N/C
Since the charged particle is positive electric field and Electric Field will have the same directions. Proton has positive charge hence here the direction of the electric field is the same as the direction of electric force. Hence towards South for both.To know more about Electric Field visit : https://brainly.com/question/26690770
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A fireman of mass 100 kg slides down a pole. If the friction between the fireman and the pole is 137 N, how much is the acceleration of the fireman?
The acceleration of the fireman sliding down a pole who weighs 100 kg with a frictional force of 137 N is 8.44 m / s²
According to Newton's second law of motion
F = m a
Net downwards force = F - f
F = Applied force
f = Frictional force
m = Mass
a = Acceleration
m = 100 kg
f = 137 N
g = 9.81 m / s²
F = m g
F = 100 * 9.81
F = 981 N
Net downwards force = 981 - 137
Net downwards force = 844 N
F = m a
a = 844 / 100
a = 8.44 m / s²
Therefore, the acceleration of the fireman is 8.44 m / s²
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Which element has the same number of valence electrons does bromine
Answer: fluorine, chlorine and bromine
Explanation: They all have the same valence electrons. Valence electrons are the electrons on the outer circular. Hope this helped!
An object is dropped from a 32m tall building. How fast will it be going when it strikes the ground?
what is the Vf?
what is the Vo?
what is the time?
is acceleration positive or negative?
1. The final velocity (Vf) is 25.088 m/s
2. The initiial velocity (Vo) is 0 m/s
3. The time is 2.56 s
4. The acceleration is positive
Data obtained from the questionThe following data were obtained from the question:
Height (h) = 32 mAcceleration due to gravity (g) = 9.8 m/s²Final velocity (vf) =?How to determine the final velocityWe'll begin by obtaining the time take to reach the ground. this is illustrated below:
Height (h) = 32 mAcceleration due to gravity (g) = 9.8 m/s²Time (t) =?h = ½gt²
32 = ½ × 9.8 × t²
32 = 4.9 × t²
Divide both side by 4.9
t² = 32 / 4.9
Take the square root of both side
t = √(32 / 4.9)
t = 2.56 s
Finally, we can obtain the final velocity as follow:
Time (t) = 2.56 sInitial velocity (vo) = 0 m/sAcceleration due to gravity (g) = 9.8 m/s²Final velocity (vf) =?vf = vo + gt
vf = 0 + (9.8 × 2.56)
vf = 0 + 25.088
vf = 25.088 m/s
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Can i get quick help with this please
Answer: force
Explanation:
it is on the y axis
A 7.0 mm diameter copper wire carries a current of 7.0 μA. What is the current density?
The current density of the copper wire is determined as 0.182 A/m².
What is current density?
The current density of a material is the amount of electric current flowing per unit cross-sectional area of a material.
The current density of the copper wire is calculated as follows;
J = I/A
where;
A is the area of the copper wireI is the current in the copper wireJ is the current densitySubstitute the given parameters and solve for the area of the wire,
A = πr²
where;
r is the radius of the wireA = π(3.5 x 10⁻³)²
A = 3.85 x 10⁻⁵ m²
J = (7 x 10⁻⁶) / (3.85 x 10⁻⁵)
J = 0.182 A/m²
Thus, the current density of the copper wire is determined as 0.182 A/m².
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An object is dropped on earth (g=10m/s/s (meters per second per second or m/s^2)) and it falls for five seconds draw a speed vs time graph
Answer:
v = 10t
Explanation:
The velocity of an object after time t is given by the equation
v(t) = u + at
Here u, the initial velocity is 0
a = acceleration = g = 10 m/s²
Therefore at any time,
v(t) = 0 + 10t
v = 10t
After 5 seconds, v = 10 m/s² x 5s = 50 m/s
The graph of this equation is given
A woman drives a golf ball off the tee to a speed of 28 m/s. The mass of the ball is 45 g and the time of contact was 6.0 ms.
If the angle of flight was initially 20o from the horizontal, how far would the ball go before it landed?
Answer:
157.9m
Explanation:
Vi = 20
t = 6
x = 28cos(20)
Find the distance by multiplying the horizontal velocity x time.
(28cos(20))(6)
= 157.9 m
A particle with mass
m = 3.80 kg
accelerates according to
a = (−3.40i + 1.70j) m/s2.
(a) What is the net force acting on the particle? (Express your answer in vector form.)
(b) What is the magnitude of this force?
The net force acting on the particle would be and the magnitude of the force would be -12.92i + 6.49j and the magnitude of the force would be 14.46 Newtons.
What is Newton's second law?Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.
The net force on the particle = mass of the particle × acceleration
=3.80*(−3.40i + 1.70j)
= -12.92i + 6.49j
Thus, the magnitude of the net force on the particle would be 14.46 Newtons.
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Which of the following statements is TRUE about graphic scores?
A. Graphic scores can only be written on manuscript paper
B. The performer can interpret the score however he/she wishes
C. Graphic scores cannot show dynamic changes
D. The composer is not allowed to make suggestions regarding the performance
Answer:
dr
Explanation:
A leopard of mass 65 kg climbs 7 m up a tall tree. Calculate how much gravitational potential energy it gains. Assume g = 10 N/kg
The potential energy gained is 4550 J.
The potential energy that a huge item has in relation to another massive object due to gravity is known as gravitational energy or gravitational potential energy. When two objects descend toward one another, potential energy associated with the gravitational field is released.
The potential difference is given as:
U = mgh
Where U is the gravitational energy, m is the mass, g is the acceleration due to gravity, and h is the height.
Now, we have
Leopard's mass, m = 65kg
The height of the tree, h = 7 m
Acceleration due to gravity, g = 10N/kg
Therefore,
U = mgh
U = 65 × 7 × 10
U = 65 × 70
U = 4550 J
Thus, the leopard will need 4550 J of gravitational potential energy to climb 7 meters.
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How much gravitational potential energy is lost when a rock of mass 3, point, 0, k, g,3.0kg falls to the foot of a 250, m,250m cliff on the Moon where 'g,g' is 1, point, 6, N, slash, k, g,1.6N/kg?
Answer:
E = 1200 JExplanation:
Data:
m = 3 kg
h = 250 m
g = 1,6 H/kg
Find:
E - ?
-----------------------------------
Solution:
E = mgh
Calculations:
E = 3 kg · 250 m · 1,6 H/kg = 1200 J
Answer: E = 1200 J.
A car drives 50 miles at a velocity of 65 mph. It then drives 40 miles at a velocity of 75 mph. What was the total time that elapsed?
Considering the definition of velocity, the total time elapsed is 1.2292 h.
Definition of velocityVelocity is a physical quantity that expresses the relationship between the space traveled by an object and the time used for it.
In other words, velocity can be defined as the amount of space traveled per unit of time with which a body moves.
The velocity can be calculated using the expression:
velocity= displacement÷ time
Time elapsedIn this case, you know:
A car drives 50 miles at a velocity of 65 mph. It then drives 40 miles at a velocity of 75 mph.Then, the elapsed time to travel each of the distances is calculated by the definition of velocity:
65 mph= 50 miles÷ time to travel 50 miles
65 mph× time to travel 50 miles= 50 miles
time to travel 50 miles= 50 miles÷ 65 mph
time to travel 50 miles= 0.7692 h
75 mph= 40 miles÷ time to travel 40 miles
75 mph× time to travel 40 miles= 40 miles
time to travel 40 miles= 40 miles÷ 75 mph
time to travel 40 miles= 0.53 h
The elapsed time will be the sum of the time it takes to travel each distance:
elapsed time= time to travel 50 miles + time to travel 40 miles
elapsed time= 0.7692 h + 0.53 h
elapsed time= 1.2992 h
Finally, the total time elapsed is 1.2292 h.
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. A sports car is advertised as being able to go from 0 to 60 in 6.00 seconds. If 60 mi/h is equal to 27 m/s, what is the sports car's average acceleration?
Answer:
Approximately [tex]2.2\; {\rm m\cdot s^{-2}}[/tex].
Explanation:
Acceleration is the rate at which velocity changes.
In this example, velocity has changed from [tex]v_{0} = 0\; {\rm m\cdot s^{-1}}[/tex] to [tex]v_{1} = 27\; {\rm m\cdot s^{-1}}[/tex]. The total change in velocity is:
[tex]\begin{aligned}\Delta v &= v_{1} - v_{0} \\ &= 27\; {\rm m\cdot s^{-1}} - 0\; {\rm m\cdot s^{-1}} \\ &= 27\; {\rm m\cdot s^{-1}} \end{aligned}[/tex].
This change happened over a period of [tex]\Delta t = 6.00\; {\rm s}[/tex]. Therefore:
[tex]\begin{aligned} & (\text{avg. acceleration}) \\ =\; & (\text{avg. rate of change in velocity}) \\ =\; & \frac{(\text{change in velocity})}{(\text{time required})}\\ =\; & \frac{\Delta v}{\Delta t} \\ \approx\; & \frac{27\; {\rm m\cdot s^{-1}}}{6.00\; {\rm s}} \\ \approx \; & 2.2\; {\rm m\cdot s^{-2}} \end{aligned}[/tex].
How do I convert 32.2 ft/s^2 to centimeter per day squared?
7.32652978 × 10∧12 centimetre per (day squared) is the answer by converting 32.2 ft/s^2 to centimeter per day squared
What does 2g acceleration mean?Humans constantly encounter many factors. One g is the usual gravitational acceleration. You must, however, accelerate 9.8 m/s2 upward in order to reach 2g. You will accelerate by 2g as a result of this. While on Earth, we frequently experience more than 1g.
This enables you to calculate the change in velocity in metres per second squared (m/s2).
An informal measurement of force using units of acceleration equal to one g that applies to a body due to acceleration or gravity. A 12 pound item moving at 2 g receives 24 pound of force, for instance.
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Imagine you had to teach someone
what an acceleration of
a = +³m
s²
How would describe how this specific
acceleration affects a car that is
initially not moving?
Is it fair to say that the car was moving at the calculated “average speed” at all points along the
track and the floor? Explain your answer
No, it is fair to say that the car was moving at the calculated “average speed” at all points along the track and the floor
Average velocity is the average value of velocity of an object during its whole period of movement. Instantaneous velocity is the velocity of an object at any given instant in its movement.
Average velocity can be equal to the instantaneous velocity if the velocity is constant. The velocity of an object can be constant if there are no external forces acting on the object. But here in the given condition, the car moves on a track where there will be frictional force and air resistance.
Therefore, it is not fair to say that the car was moving at the calculated “average speed” at all points along the track and the floor.
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Which table correctly identifies the SI units for temperature, mass, length, and
Volume?
The SI units of-
Temperature--- kelvins
Mass--- kilogram
Length--- meter
Volume--- litre
What are the types of SI units?CGS units The centimeter-gram-second system of units is how this is expressed.
FPS units The foot-pound-second system of units is what this is in its entire form.
MKS unit This system's full name is meter, kilogram, and second.
SI unit. International System of Units is the longer abbreviation for the units.
Why are SI units necessary?The SI includes units for all common measurement types, but its core consists of seven units known as the "basic units." To maintain comparability and consistency across the globe in our everyday measurements, we need the International System of Units.
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Answer:
Length = meter
mass = kilogram
volume = cubic meter
temperature = kelvin
Explanation:
apexs
What is the first step to composing a short piece?
A. Choosing an image as stimuli
B. Choosing your lyrics
C. Choosing a rhythm and a melody
A TWO WHEEL DRIVE TRACTOR MOVING FOWARD AND TURNS SHARP TO THE LEFT AROUND A CORNER. WHICH WHEEL WILL TURN SLOWEST
The tractor is in linear motion but the wheels of the tractor are in rolling motion.
When the sudden turn comes then it wants to continue in rolling motion due to conservation of angular momentum.
But the angular momentum is applied and due to inertia, the weight and friction shifts on the bigger wheels causing difference in the angular speed.
Thus, the bigger rear wheels of the tractor rotate more slowly as compared to front small wheels because the bigger wheels have greater moment of inertia due to their mass as compared to front small wheels. That’s why the rear wheels are bigger than the front wheels.
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A soccer player kicks a ball 6.5 meters. How much time is needed for the ball to travel this distance if its velocity is 2.2 meters per second, south.
The time taken for the ball to travel the 6.5 m distance at a velocity of 2.2 m/s is 2.95 s
What is velocity?Velocity is simply defined as the rate of change of displacement with time. Mathematically, it can be expressed as:
Velocity = displacement / time
With the above formula, we can obtain the time. Details below
From the question given above, the following data were obtained:
Velocity = 4 m/sDisplacement = 6.5 mTime = ?The time taken to travel 6.5 m can be obtained as follow:
Velocity = displacement / time
2.2 = 6.5 / time
Cross multiply
2.2 × time = 6.5
Divide both sides by 2.2
Time = 6.5 / 2.2
Time = 2.95 s
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A car is traveling at 60 mi/h down a highway. (a) What magnitude of acceleration does it need to have to come to a complete stop at a distance of 200 ft? (b) What acceleration does it need to stop in 200 ft if it is traveling at 100 mi/h?
The acceleration of the car for it to stop within the given distances at the given speeds will be:
a. acceleration = -47520 mi/h²
b. acceleration = -132000 mi/h²
What would the acceleration of the car be?The acceleration of the car for it to travel a distance of 200 ft is calculated as follows:
initial velocity of the car = 60 mi/h
final velocity of the car = 0 mi/h
distance travelled = 200 ft
5280 ft = 1 mile =
200 ft = 200/5280 miles
acceleration, a = ?
Using the formula:
v² = u² + 2as
0 = 60² + 2 * 200/5280 * a
400a/5280 = -3600
a = -47520 mi/h²
Acceleration for it to stop in 200 ft will be:
v² = u² + 2as
0 = 100² + 2 * 200/5280 * a
400a/5280 = -10000
a = -132000 mi/h²
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If you are given values for Δx, v, and Δt, which kinematic equation could be used to find v0?
V = v0 + aΔt
Δx= (v + v0/ 2) Δt
v^2 = v0^2 2aΔx
Δx = v0Δt + 1/2 a (Δt)^2
The kinematic equation which could be used to find v₀ is Δx= (v + v₀/ 2) Δt; option B.
What are kinematic equations?Kinematic equations are equations which relates the motion of a body.
Kinematic equations shows the relationship between the various parameters of motion of a body:
change in position, Δxchange in time, Δtacceleration. ainitial velocity, v₀final velocity, vThe kinematic equations are given below:
V = v + a*ΔtΔx= (v + v₀/ 2) Δtv^2 = v₀² + 2aΔxΔx = v₀Δt + 1/2 a * (Δt)²Given the values for Δx, v, and Δt, the kinematic equation which could be used to find v₀ is Δx= (v + v₀/ 2) Δt
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The Following graph illustrates how jamil moves as he goes to the paper shop:
Jamil cycles to the shop and back home in 360 seconds. Jamil takes 150 seconds to reach the shop and stays there for 90 seconds and come back to home.
How to calculate Speed and distance travelled?
Speed is the rate at which an object or a body moves.
Formula of Speed:
Speed = Distance/Time
In the given graph, Jamil cycles to the shop, time taken by Jamil to reach the shop can be calculated by the first part of the graph.
Time taken = (150-0)sec
Time = 150 sec
The distance travelled by Jamil is denoted on the Y-axis:
Distance travelled to get to the shop = 450m
Speed at which Jamil cycles to the shop can be calculated by:
Speed = Distance/Time
Speed = 450m/150sec
Speed = 3m/sec
The time period for which Jamil stays at the shop can be inferred from the graph as the distance travelled will be zero at that time.
Time for which distance is constant = Horizontal part of the graph
Time = 240sec-150sec
Time = 90sec
The speed at which Jamil cycles back to his home can be calculated by the last part of the graph when he goes back to his home from shop.
Time taken = (360-240)sec
Time taken = 120 sec
Distance Travelled = 450m
Speed = Distance travelled/ Time taken
Speed = 450m/120sec
Speed = 3.75m/sec
Therefore, the speed of Jamil while going to the shop is 3m/sec while the speed of Jamil returning back to home is 3.75m/sec.
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What does the image indicate about representation at
the Constitutional Convention?
O The delegates represented a broad, diverse
segment of the population.
O The delegates represented upper-class White men
with political power.
O The delegates represented the farmers who
participated in Shays's Rebellion.
O The delegates represented women, African
Americans, and American Indians.
The delegates represented upper-class White men with political power.
What constituted the Constitutional Convention?Philadelphia, Pennsylvania offered to host the Constitutional Convention from May 14 to September 17, 1787. Choosing America's future government was the main goal of the event. Many of the delegates had much more ambitious plans than the official purpose of the Convention, which was to amend the current Articles of Confederation. It is with the purpose to create concepts for a new government and to revise the Articles of Confederation.
How did the Constitutional Convention affect society?The federal government created by the United States Constitution, which resulted from the convention, was given more precise powers, including those pertaining to managing relations with other governments.
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Answer:
The delegates represented upper-class White men with political power.
What constituted the Constitutional Convention?
Philadelphia, Pennsylvania offered to host the Constitutional Convention from May 14 to September 17, 1787. Choosing America's future government was the main goal of the event. Many of the delegates had much more ambitious plans than the official purpose of the Convention, which was to amend the current Articles of Confederation. It is with the purpose to create concepts for a new government and to revise the Articles of Confederation.
How did the Constitutional Convention affect society?
The federal government created by the United States Constitution, which resulted from the convention, was given more precise powers, including those pertaining to managing relations with other governments.
Explanation: