Answer:
Question 5: The outer core has a lower temperature and lower pressure than the inner core
This is because the outer core is not as hot as the inner core. It is also under slightly less pressure. Due to this, the outer core is liquid and less dense than the inner core.
Question 6: I'm not sure what the answer to that is.. but I believe you'll figure it out!
Answer:
The reason why the inner core of planet Earth is a solid while the outer core is a liquid is because: B. The outer core has a lower temperature and lower pressure than the inner core.
Earth refers to one of the planetary bodies that rotates on its axis and revolves around the Sun in slightly elliptical orbits.
Generally, Earth comprises four (4) distinct layers starting at the center and these include;
The inner core.
The outer core.
The mantle.
The crust.
The inner core is the deepest layer of planet Earth and a solid while the outer core is a liquid.
One of the strategies used by scientists to learn about Earth's deepest layers, inner and outer structure is by recreating high-pressure conditions in a laboratory.
According to these experiments conducted by scientists on planet Earth, the pressure in the inner core is immense and over three (3) million times greater than the pressure on Earth’s outer core.
In conclusion, the inner core has a higher temperature and higher pressure than the outer core of planet Earth, thereby, making the inner core of planet Earth is a solid while the outer core is a liquid.
Explanation:
How should the student change the circuit to give negative values for current and
potential difference?
Answer:
changing the polarity or direction of the battery changes the sign of the voltage and the current
Explanation:
The sign of current and voltage are due to established conventions.
The way that a DC circuit with negative current values is by changing the polarity of the power source or by inverting the battery, this creates that the electrons move in the opposite direction
Changing the battery also changes the direction of the power difference, since the potential from positive to negative, in most cases negative is assigned a potential of zero volts
In summary, changing the polarity or direction of the battery changes the sign of the voltage and the current
The psychologist who believed that behaviors that are followed by favorable consequences tend to be repeated was __________.
A.
James B. Watson
B.
B. F. Skinner
C.
Edward Thorndike
D.
Franz Mesmer
Answer:
the answer is B
Explanation:
The development of the theory of reinforcement by B. F. Skinner (Burrhus Frederick Skinner) and his behaviors support for its application to learning contributed to the emergence of the behaviorism and programmed instruction movements. Thus, option B is correct.
What psychologist believed that behaviors by favorable?Small instructional frames, self-pacing, active learner reaction to inserted questions, and fast feedback regarding behaviors the accuracy of a response are all characteristics of programmed instruction.
In essence, individualized education substitutes methodical or pre-programmed materials for the behaviors. Individualized teaching can be delivered by print, computer, or other medium as long as it is founded on the ideas mentioned above.
Therefore, The psychologist who believed that behaviors that are followed by favorable consequences tend to be repeated was B. F. Skinner.
Learn more about behaviors here:
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A person lifts a package weighing 75 N. If she lifts it 1.2 m off the floor, what work has she done?
Answer:
The answer is 90 JExplanation:
The work done by an object can be found by using the formula
workdone = force × distance
From the question we have
workdone = 75 × 1.2
We have the final answer as
90 JHope this helps you
Answer:
[tex]\boxed {\boxed {\sf 90 \ Joules}}[/tex]
Explanation:
Work can be found by multiplying the force by the distance.
[tex]W=f*d[/tex]
The force of the package is 75 newtons.
The distance the package is lifted off the ground is 1.2 meters.
[tex]f= 75 \ N \\d=1.2 \ m[/tex]
Substitute the values in and multiply.
[tex]W= 75 \ N *1.2 \ m[/tex]
[tex]W=90 \ N*m[/tex]
1 Newton meter (N*m) is equal to 1 Joule (J).
Therefore, our answer of 90 Newton meters is equal to 90 Joules.
[tex]W= 90 \ J[/tex]
The work done is 90 Joules.
How much time is required for a 20 Coulombs charge to flow through a point if the current is 2 amperes? help plzzzzz
The time required for a 20 coulombs charge to flow through a point if the current is 2 amperes will be 10 seconds.
What is electric current?Electric current is defined as the ratio of the charge flow in a given time interval. It is denoted by I. It has the unit is ampere.
The given data in the problem is;
t is the time is required
q is the charge = 20 Coulombs
I is the current is= 2 amperes
The formulas for the elctric current are given as;
[tex]\rm I = \frac{q}{t} \\\\\ \rm t = \frac{q}{I} \\\\ \rm t = \frac{20}{2} \\\\ t=10 \ sec[/tex]
Hence the time required for a 20 coulombs charge to flow through a point if the current is 2 amperes will be 10 seconds.
To learn more about the electric current refer to the link;
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The time required for a 20 coulombs charge to flow through a point if the current is 2 amperes will be 10 seconds.
What is electric current?Electric current is defined as the ratio of the charge flow in a given time interval. It is denoted by I. It has the unit is ampere.
The given data in the problem is;
t is the time is required
q is the charge = 20 Coulombs
I is the current is= 2 amperes
The formulas for the electric current are given as;
[tex]I=\dfrac{q}{t}[/tex]
[tex]t=\dfrac{q}{I}[/tex]
[tex]t=\dfrac{20}{2}[/tex]
[tex]t=10 sec[/tex]
Hence the time required for a 20 coulombs charge to flow through a point if the current is 2 amperes will be 10 seconds.
To learn more about the electric current refer to the link;
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One of the largest pipe organs is in the aŭditorium organ in the Fox Theatre. The pipe is 32
ft. long and produces a sound with a wavelength of about 8.8m. If the speed of sound in air is 346
m/s what is the frequency of this sound? What is the period? Show all work and explain your
answer. (12 pts.)
Answer:
Explanation:
Wave Period and Frequency In this video Paul Andersen explains how the period is the time between wave and the frequency is the number of ... Your browser does not currently recognize any of the video formats available. ... Show less Show more ... Waves: Light, Sound, and the nature of Reality.
The car on a track begins at the 80-cm mark. The car moves in the negative direction at a speed of 5 cm/s. After three seconds, a. What distance has the car traveled? b. What is the displacement of the car? c. What is the car's new position on the track? Please hurry up
Answer:
a) The car travelled a distance of 15 centimeters.
b) The displacement of the car is -15 centimeters.
c) The new position of the car on the track is 65 centimeters.
Explanation:
a) From Mechanical Physics we know that the distance travelled is magnitude of the route covered by the vehicle. If this car travels in a straight line and at constant velocity, then we can calculate the distance traveled by the following expression:
[tex]\Delta s = v\cdot \Delta t[/tex] (Eq. 1)
Where:
[tex]v[/tex] - Speed of the car, measured in centimeters per second.
[tex]\Delta t[/tex] - Time, measured in seconds.
[tex]\Delta s[/tex] - Distance travelled by the car, measured in meters.
If we get that [tex]v = 5\,\frac{cm}{s}[/tex] and [tex]\Delta t = 3\,s[/tex], then the distance travelled by the car is:
[tex]\Delta s = \left(5\,\frac{cm}{s} \right)\cdot (3\,s)[/tex]
[tex]\Delta s = 15\,cm[/tex]
The car travelled a distance of 15 centimeters.
b) The displacement is the vectorial distance between final and initial position. Then, we find that initial and final positions of the car are, respectively:
Initial position:
[tex]s_{o} = 80\,cm[/tex]
Final position: ([tex]s_{o} = 80\,cm[/tex], [tex]\Delta s = 15\,cm[/tex])
[tex]s_{f} = s_{o} -\Delta s[/tex] (Eq. 1)
[tex]s_{f} = 80\,cm-15\,cm[/tex]
[tex]s_{f} = 65\,cm[/tex]
And the displacement of the car is: ([tex]s_{o} = 80\,cm[/tex], [tex]s_{f} = 65\,cm[/tex])
[tex]d = s_{f}-s_{o}[/tex] (Eq. 2)
[tex]d = 65\,cm-80\,cm[/tex]
[tex]d = -15\,cm[/tex]
The displacement of the car is -15 centimeters.
c) The position of the car is its location regarding a point of reference. From point b) we find that the new position of the car on the track is:
[tex]s_{f} = 65\,cm[/tex]
The new position of the car on the track is 65 centimeters.
What happens when the two waves meet?
A.
They superimpose and remain at the same amplitude.
B.
They experience destructive interference and cancel each other out.
C.
They experience constructive interference and have twice the amplitude.
D.
They superimpose and have half of their original amplitude.
when two or more waves meet, they interact with other. The intersection of waves with other waves is called wave interference. wave interference may occur when two waves that are traveling I opposite directions meet. the two waves pass through each other, and this affects their amplitude
Velocity refers to an object’s _____ and direction.
YO YO I NEED HELP!!!
Answer: Light energy
Explanation: Light energy is a form of radiant energy that is visible to the human eye.
What are gears and what is a lever ?
Answer:
agear lever or agear stick is the lever that you use to change gear in acar or other vehicle
calculate the value of net force acting on given body?5N acting towards right & 15N force acting towards left on the brick.(draw fbd)
please help!!!!!
Answer:
-10N to the left.
Explanation:
The net force on a body is the single force that represent all the forces acting on a body.
Let the right direction be positive
Let the left direction be negative
Force acting to the right = 5N
Force acting to the left = -15N
Net force = 5N + (-15N) = -10N
The net force will be directed -10N to the left.
A motorcycle has 100,000 J of kinetic energy and is traveling at 20 m/s. Find its mass.
Answer:
The answer is 500 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{2KE}{ {v}^{2} } \\ [/tex]
v is the velocity
KE is the kinetic energy
From the question we have
[tex]m = \frac{2 \times 100000}{ {20}^{2} } = \frac{200000 }{400} = \frac{2000}{4} \\ [/tex]
We have the final answer as
500 kgHope this helps you
Just helping as usual what about you
Answer:
same i just love helping people out
god bless you have a blessed day
Explanation:
Answer:
I do too
Explanation:
I like to help others especially if it has been filled in by struggling in a certain concept of a subject.
Do u agree?
4.
You are riding your bike and you slam on your breaks. What is most likely the accelerations that your bike undergoes? this is a quiz
Answer:
This question appear incomplete
Explanation:
This question appear incomplete because of the absence of options but when you slam on the brakes when riding a bike or other vehicles, the bike undergoes deceleration. Deceleration is a type of acceleration with a negative value which usually points in the opposite direction of the velocity. As described in the question, deceleration is usually brought about by a decrease in magnitude of a velocity.
anybody got any answers???
Answer:
b? to a?
Explanation:
It converts mechanical energy to electrical.
Therefore, Option A is the correct answer
a particle starts from rest and moves with a constant acceleration of 0.5 m/s². Calculate the time taken by particle to cover a distance of 25 m
what do you know about healthy relationship true or false
Answer:
this question doesn't make sense
Explanation:
A ball strikes a wall. It exerts a force of 10 N to the left against the wall and bounces off. What force does the wall exert on the ball? 10 N to the left 10 N to the right more than 10 N to the left more than 10 N to the right
Given :
A ball strikes a wall. It exerts a force of 10 N to the left against the wall and bounces off.
To Find :
What force does the wall exert on the ball.
Solution :
We know, by third law of motion "every motion has equal and opposite reaction".
Ball exert a force of 10 N to the left against the wall.
So, by newton's third law of motion :
Wall will exert same force of 10 N in opposite direction i.e in right direction.
Therefore, force does the wall exert on the ball is 10 N to the right.
Hence, this is the required solution.
Answer:
10 N to the right
Explanation:
edge 2021
A paintball is fired horizontally from a tower 45 m above the ground. If the paintball gun fires at 90 m/s… How long does it take for the paintball to hit the ground? How far away from the tower will the paintball land?
Answer:
The time taken for the paint ball to hit the ground is [tex]t = 2.143 \ s[/tex]
The distance of the landing point from the tower is [tex]d = 192.86 \ m[/tex]
Explanation:
From the question we are told that
The height of the tower is [tex]h = 45 \ m[/tex]
The speed of the paintball in the horizontal direction is [tex]v_x = 90 \ m/s[/tex]
Generally from kinematic equation we have that
[tex]h = ut + \frac{1}{2} at^2[/tex]
Here u is the initial velocity of the paintball in the vertical direction and the value is 0 m/s , this because the ball was fired horizontally
a is equivalent to [tex]g = 9.8\ m/s^2[/tex]
t is the time taken for the paintball to hit the ground
So
[tex]45 = 0* t + \frac{1}{2} 9.8 * t^2[/tex]
=> [tex]t = 2.143 \ s[/tex]
Generally the distance of its landing position from the tower is
[tex]d = v * t[/tex]
=> [tex]d = 90 * 2.143[/tex]
=> [tex]d = 192.86 \ m[/tex]
The carrot hangs from the ceiling by two ropes (1 and 2).
What is the correct free body diagram for the carrot?
Answer:
The Answer is D!
Explanation:
I checked it on Khan Academy.
The correct free body diagram of the hanging carrot is option B, where, the forces from two ropes and the net force acting upward and the gravitational force acting downwards.
What is free body diagram?A free body diagram is a representation of a body with different kinds of forces acting upon it with respect to its position and direction.
There are different kinds of forces namely magnetic force, tension force, nuclear force, gravitational force and the normal force etc. The force acting on a massive moving body will be the product of its mass and acceleration.
The direction of each force acting upon a body will be different and the displacement also. Here, the carrot hanged by the two ropes will experience forces from both ropes which hangs it down but the force acting is upwards and thus the net force is upward.
The gravitational force Fg acting on a body is always downward and thus the correct diagram depicting the free body of the carrot with forces is option B.
To find more about forces, refer the link below;
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To obtain the number of meters from a distance measured In centimeters, you must ____ by the number _____
Answer:
Divide by the number 100
Explanation:
Since there are 100 centimeters in 1 meter, we can see that if you are given a number in centimeters, the number of meters is that number divided by 100. Hope this helps!
Answer:
Divide by 100
Explanation:
What refers to the bending of light as it passes from one medium into another?
10. Which of the following arrangements of visible light colors shows decreasing wavelength?
A. red, orange, yellow, green, blue, indigo, violet
B. red, yellow, green, orange, violet, blue, indigo
C. violet, blue, green, orange, red, indigo, yellow
D. violet, indigo, blue, green, orange, yellow, red
12. What refers to the splitting of white light into seven different colors?
A. dispersion
B. refractive index
C. reflection
D. refraction
13. Refractive Index is a ratio between the speed of light in vacuum and .
A. speed of light in vacuum
B. speed of sound in vacuum
C. speed of light in a medium
D. speed of sound in a medium
15. Based on the colors of light, what color comes between red and yellow?
Answer:
9.Refraction
13.refractive index is the ratio of velocity of light in a vacuum to it's velocity I. a specified medium.
12.dispersion
14.Orange with a wavelength of about 585-620
I have no idea of number 10
A B-52 bomber jet flies at a horizontal velocity of 286.2 m/s and at an altitude of 7500 m above the ground.
How far away horizontally should a payload be dropped to land on a target?
Answer:
you need to divide 7500/286.2
Plz help !!!!!! ................................
Answer:
I think the answer is B. Can I have brainlest if I am right, please?
Explanation:
Answer:
it is B because period =1/ frequency and B has lower period
The weight of an object is determined by it X
. ?
Mass
Gravity
Height
Both A&B
Answer:
gb tbbyeyb
Explanation:
can anyone solve this?
Carol pushes down at an angle of 30 degrees from the vertical on a 10.0 kg wood crate causing the crate to move across a wood floor at a constant velocity of 2.0 m/s. How much force does Carol exert on the crate? (μs = 0.5 and μk = 0.2)
Answer:
F = 39.2 N
Explanation:
Since, the object is in uniform motion. Therefore, the frictional force on object will be:
Frictional Force = μk N = μk mg
where,
μk = coefficient of kinetic friction = 0.2
m = mass of crate = 10 kg
g = 9.8 m/s²
Therefore,
Frictional Force = (0.2)(10 kg)(9.8 m/s²)
Frictional Force = 19.6 N
The horizontal component of force must be equal to this frictional force to continue the uniform motion:
F Sin 30° = 19.6 N
F = 19.6 N/Sin 30°
F = 39.2 N
In this chemical reaction, one or more atoms replaces a part of a
compound.
*
synthesis
decomposition
combustion
replacement
neutralization
Explanation:
If there are more reactants than products, it is a synthesis reaction. If oxygen is a part of the reactant, it is a combustion reaction. If one ion replaces another, it is a single replacement reaction. If there are two compounds in a reactant where cations switch, it is a double replacement reaction.
gasoline burning in a car engine
Is what type of energy?
Answer:
convection
Explanation:
Which scenario describes an effect of tornadoes on the environment? a section of forest that has been burned a path through a town with uprooted trees a town near the coast with heavy flooding a sandy beach that shows signs of erosion
Answer:
B; a path through a town with uprooted trees
Explanation:
took the quiz and got it right on edge2020!
The effect of tornadoes on the environment is a path through a town with uprooted trees. This, option B is correct.
What are tornadoes?It is the typical weather event that contains strong winds and leaves a path of destruction up to 50 miles long. It is also defined as the violently rotating column of air that touches the ground and is usually attached to a thunderstorm.
It is developed from a severe thunderstorm in warm, moist, and unstable air and extended up to 300 miles. The thunderstorms also generate heavy damage and devastate the environment in seconds and cause more fatalities.
A swirling, funnel-shaped, whirling wind is called a tornado and it is accompanied by hurricanes and storms. Strong tornadoes last for twenty minutes and the winds are between 200 mph to 300mph. The United States and Canada are mostly tornado-affecting countries.
The effect of tornadoes is a path through a town with uprooted trees and hence, the ideal solution is option B.
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What is the difference between oceanic crust and continental crust?