The first and second marble have the same speed at the bottom.
We need to know about the conservation of energy to solve this problem. The energy can not be created or destroyed, the only way is to change to another form. It can be written as
Ei = Ef
where Ei is initial energy and Ef is the final energy
The potential energy of the first marble is the same as the second marble because they have the same height. According to conservation of energy, the potential energy will be converted to kinetic energy and the speed of the marbles will same at the bottom.
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Albert bandura conducted an important experiment with pre-school aged children. one reason this study is important in 2014 is: group of answer choices children imitated an adult lab assistants behavior children are quite capable of violence children can imitate adult behavior and behavior that is observed, so does media impact violent behavior? some children spend much time watching adults in our world. children should be protected from all violent scenes
Answer:
children spend much time watching adults in our world. children should be protected from all violent scenes
Explanation:
Are acts of violence and aggression taught behaviours? Albert Bandura and his colleagues established one method that kids pick up violence in the well-known and significant "Bobo doll experiment."
According to Bandura's social learning theory, learning happens through interactions with other people and observations of the world around us. In essence, people pick up new skills by observing others and then copying their behaviour.
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Yes, all violent scenes should be kept out of children. This experiment is also known as the Bobo Doll Experiment from the perspective of Albert Bandura. Which Discloses Aggression Among Children.
Numerous social evils, such as war and intergroup violence, are caused by aggression. It should come as no surprise that the topic is one of psychology's most researched areas. Most of the research on human aggression has been conducted by researchers in the discipline of social psychology, which is devoted to the study of interpersonal communication and group dynamics.
Albert Bandura's studies on children's behaviour after seeing an adult were collectively known as the "Bobo doll experiment" and were conducted between 1961 and 1963.
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robots use cameras, microphones, and other sensors as inputs; outputs can be as complex as exploring damaged nuclear reactors to as simple as taking a photo.
Robots use cameras, microphones, and other sensors as inputs; outputs can be as complex as exploring damaged nuclear reactors to as simple as taking a photo.
What is a Robot?This is referred to as a machine which in most cases resembles a human being and it is involved in the execution of complex tasks in an automated manner such as lifting an object etc.It is usually controlled using a computer and employs the use of input devices such as cameras, microphones etc which ensures adequate and an easy execution of the tasks.
The output is also usually complex and the comparison is with that of a damaged nuclear reactors and this technological innovation has been useful in different facets of life due to the ease of performing activities it brings.
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The question is:
The functions of robots, cameras, microphones, and other sensors as inputs include:
An A. C is supply is
Connected accross a Capacitor
of 5 nf R=50_n in series at 50ttz find the;
Capacity rectance
Pedance
Supply Current
Vortage a cross the capacity
Answer:
d
Explanation:
a 74-kg base runner begins his slide into second base when he is moving at a speed of 4.8 m/s. the coefficient of friction between his clothes and earth is 0.70. he slides so that his speed is zero just as he reaches the base.
The work energy of speed is
1304.2 .
What is work energy?
work energy is the most fundamental quantity of physics . Work is said to be done when a force applied to an object cause a displacement of a object.
Solution -
As per the given-
Mass of runner m = 74kg
Initial velocity of runner u=4.8 m/s
Final velocity of runner v =0
Coefficient of friction ¥=0.7
Let's d be the distance moved by runner till the stop.
a- mechanical energy lost due to friction
As friction does negetive work causing the runner to stop.
As we know,
Mechanical energy lost= Kinetic energy of runner
Mechanical energy lost =
1/2 mv^2 = 1/2 ×74×4.8^2=852.2
Distance move by runner-
Work done by friction = mechanical energy lost
-¥×mg×d =852.2 j
-0.7×74×9.8×d = -491.2
Solving the equation we get
1304.2.
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if length of a wire is doubled keeping the diameter constant ,its young modulus of elasticity will?
i) increases
ii)decreases
iii)remains same
iv)depends on nature of matter
Answer:
Explanation:
Young's modulus is the property of the material and it does not depend upon the length or the area of the cross-section.
Hence, The most correct answer will be option (iii) but youngs modulus also depends upon the nature of the matter if you have to answer multiple option then (iii) and (iv) both are correct. If you have to answer only single option then go for option (iii).
Who did experiments with light , known as the double-slit experiments, to produce interference patterns that could only be explained by evoking a wave-like nature for light?.
Thomas Young did the experiments with light , known as the double-slit experiments, to produce interference patterns that could only be explained by evoking a wave-like nature for light.
What is the double-slit experiment?
Thomas Young an English physicist, was the first to perform the double slit experiments. The experiment involved passing light through two tiny slits, thereby producing an interference pattern that could not be reconciled with the corpuscular view of light. Thus, the findings of Thomas Young supported the hypothesis that light consists of waves rather than particles.
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julia jumps straight upward on mars, where the acceleration due to gravity is 3.7\,\dfrac{\text{m}}{\text{s}^2}3.7 s 2 m 3, point, 7, start fraction, start text, m, end text, divided by, start text, s, end text, squared, end fraction downward. after 3\,\text{s}3s3, start text, s, end text, julia is falling downward with a velocity of 3.1\,\dfrac{\text{m}}{\text{s}}3.1 s m 3, point, 1, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction. assuming air resistance is negligible, what was the initial vertical velocity of julia's jump? answer using a coordinate system where upward is positive. \dfrac{\text m}{{\text s}} s m
The initial velocity of Julia's jump in the vertical direction is 8 m/s.
What was the initial vertical velocity of Julia's jump?The initial vertical velocity of Julia's jump is determined using the given parameters and the relevant equation of motion.
The given parameters in Julia's jump are as follows:
Taken upward direction as positive;
Acceleration due to gravity (upward direction against gravity) = -3.7 m/s²
Time, t = 3 s
Final velocity, v (downward direction) = -3.1 m/s
Initial velocity, u = ?
Using the equation: v = u + at
u = v - at
u = -3.1 - (-3.7 * 3)
u = 8 m/s
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Listen
If the displacement of a person from their desk is 27 m, 17° S of W, how far west are
they from their desk?
If the displacement of a person from their desk is 25.92 m if 27 m, 17° S of W, they are west from desk.
Resolving the 27 m distance into its horizontal and vertical components. The horizontal component will describe how far west they are and the vertical component will describe how far south they are. After resolving the components make a right angled triangle.
cos θ = Adjacent side / Hypotenuse
θ = 17°
Adjacent side = Horizontal component
Hypotenuse = 27 m
cos 17° = West distance / 27
West distance = 0.96 * 27
West distance = 25.92 m
In a right angled triangle some of the ratios similar to the one used above can be used. These ratios are called as trigonometric ratios. These ratios use trigonometric functions and relate them to sides of a right angled triangle.
Therefore, they are 25.92 m west from the desk.
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The application of scientific knowledge to benefit people is….?
The application of scientific knowledge to benefit people is referred to as technology.
What is Technology?
This is referred to as the different ways in which scientific knowledge is applied so as to improve the living conditions and to ensure the practical aims of individuals are achieved.
Technology such as the invention of vehicles made it easier for the movement of goods and people from one place to another.It helped reduce stress and ensured that emergency situations were promptly attended to. It employed scientific knowledge such as motion, inertia etc in the design and production of it.
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3) A kid finds a super creepy doll and immediately chucks it off a cliff that is 72 meters high. The
super creepy doll flies 51 meters before it hits the ground. DRAW A PICTURE.
A) How long does it take for the super creepy doll to hit the ground?
B)At what horizontal velocity did the kid throw the doll
It takes 13.22 m/s as the horizontal velocity with which the kid throw the doll and the doll takes 3.77 seconds to hit the ground.
What is velocity and how it comes out to be 3.77 m/s ?As studied earlier the velocity is the change in the displacement per unit time of the object.Here it is given that the cliff is 70m high. And the doll flies 51 meters before it hits the ground.The flight edge 70m x 50m , using second equation of motion we can clearly see the displacement is equal to initial velocity.Accordingly putting in equation , {2x70/9.8}^1/2 and this will come out to be 3.77 seconds.For finding horizontal velocity using second equation of motion, from here we can say that the initial horizontal velocity is 13.22 m/s with which the kid threw the doll.To know more about velocity visit:
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On the periodic table, gold has the atomic number 79. This means that
A. an atom of gold has 79 protons and electrons combined.
B. gold can be found in 79 isotopes.
C. gold was the 79th element discovered.
D. an atom of gold has 79 protons.
Answer:
Option D is correct.
Explanation:
Atomic number of an element represent the number of protons present in its nucleus.
So, option D will be correct.
Answer: An atom of gold has 79 protons in its nucleus, or, in your case, C.
Explanation: The atomic number of an atom is the number of protons in the nucleus of an atom.
(I'm not entirely sure if this is clear enough, sorry!)
the x component of vector a is 8.7 units, and its y component is -6.5 units. the magnitude of a is closest to group of answer choices 12 units 7.9 units 9.9 units 8.9 units 11 units
The x component of vector a is 8.7 units, and its y component is -6.5 units. the magnitude result is 11 units.
"How much of a quantity" is how the word "magnitude" is defined. The magnitude, for instance, can be used to describe a comparison of the speeds of a car and a bicycle. Additionally, it can be used to describe how far an object has travelled or how much of an object is represented by its magnitude.
In physics, magnitude is referred to as an object's maximal size and direction. Both vector and scalar values use magnitude as a component factor. We know that scalar quantities are those that have magnitude and nothing else by definition. Contrarily, vector quantities are those with both magnitude and direction.
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URGENT!! ILL GIVE
BRAINLIEST! AND 100 POINTS
What element is shown below?
If 10 KJ of thermal energy is added to the system and 10 KJ of work is done by the system, what happens to the internal energy?
Given :
Thermal energy = 10 KJ Work done = 10 KJSolution :
We need to calculate the internal energy of the system i.e., ΔU.
Thermal energy (ΔQ) = 10 KJWe know that,
ΔU = ΔQ - ΔW>> ΔU = (10 - 10) KJ
>> ΔU = 0
Therefore,
Change in internal energy of system is zero.at which lettered point or points is the object speeding up? check all that apply. at which lettered point or points is the object speeding up?check all that apply. aa bb cc none submitrequest answer part b at which lettered point or points is the object slowing down? check all that apply.
The object is speeding up at point D and next the speed picks up at point C.
How to check the speed of the object?We have a time-position graph in front of us with a few points marked on it that we ought to investigate. The location where the curve's steepest slope is located is where the object is going the fastest.The point is D in this instance.Keep in mind that the graph changes to the right; therefore, if the right side is higher than the left side at any point, the item is traveling to the left (negative x-axis) at that precise moment. In this case, the points are C, D, and E.The item accelerates when the curve's curvature changes and the slope rises; for instance, from B onwards, the acceleration increases.Next, the speed picks up at point C. The inverse of what we just said is true: if the slope declines, the object slows down.In this instance, it is clear that the slope steepens after A and after E.When is the object reversing?It's simple to understand that the item moves to the right (positive x-axis) until it reaches point B, at which point it flips around.To learn more about the speed of an object, refer
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if the object's initial velocity is 0 m/s, what is the acceleration of an object at t=8 s?
The rate of acceleration is =11.25ms−2
The initial velocity is u=0ms−1
The final velocity is v=90ms−1
The time is t=8s
The acceleration is
a=v−ut= 90ms−2
How do you determine an object's acceleration?The acceleration of an object is equal to the net force exerted on it divided by its mass, or a = F m, in accordance with Newton's second rule of motion. When an item's mass and the net force acting on it are known, the acceleration of that object can be calculated using this equation for acceleration.
The equation a = v/t denotes acceleration (a), which is the change in velocity (v) over the change in time (t). This enables you to calculate the change in velocity in metres per second squared.
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A particle executing SHM along a straight line has a velocity of 4cm/s, when at a distance of 3cm from its mean position and 3cm/s, When at a distance of 4cm from it. Find the time it takes to travel 2.5cm from its mean position.
The time it takes to travel 2.5cm from its mean position is 1.048 secs.
Describe the mean position.When there is no net force exerted on the body, it is in the mean position, sometimes referred to as the equilibrium position. An oscillating particle's phase: This shows how the particle is vibrating right now.
Given,
case(1), V1=4ms−1,y1=3m,
case(II), V2=3ms−1,y2=4m.
We know that, V=ω√( a^2−y^2 )
Case (I) 4=ω√(a^2−3^2)..(i)
Case(II) 3=ω√(a^2−4^2) …(ii)
Dividing (i) by (ii) , we get
16a^2−256=9a^2−81
After solving we get,
a=√25 =5m
Substituting it in (i), we get
ω= 4 / 4 = 1 rads^−1
When the particle is 2.5 meters from the extreme location, its distance from the mean position is given by the equation x = 5−2.5 = 2.5m.
Given that SHM must note the time from an extreme point, we will apply the relation:
x=acosωt.
2.5= 5cos 1 × t = 5 cos t
=> cost = 2.5/5 = 1/2 = cos ( [tex]\pi[/tex]/3 )
=> t = [tex]\pi[/tex] / 3 = 22 /7 x 3 = 1.048 secs
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at what times t is the turtle a distance of 10.0 cm from its starting point? what is the velocity (magnitude and direction) of the turtle at each of those times?
When a car reaches a stop at the top of a hill, kinetic energy is transforms into what energy?
Answer:
to potentialenergy
explanation :a potential energy is stored energy or it oesn't get in moving body
3) A stone is dropped into a well that is 57.0m deep. The stone accelerates due to gravity, at 9.81 m/s^2. Determine the time it takes for the stone to hit the bottom.
The time of motion of the stone when it hits the bottom is 3.41 seconds.
What is time of motion?The time of motion is the time taken for an object travel form its initial position to final position.
The time taken for the stone dropped from the given height to hit the bottom of the well is calculated as follows;
h = vt + ¹/₂gt²
where;
v is the initial velocity of the stone = 0t is the time of motion of the stoneh is height of fallh = ¹/₂gt²
2h = gt²
t² = 2h/g
t = √(2h/g)
t = √(2 x 57 / 9.81)
t = 3.41 seconds
Thus, we can conclude that when the stone is dropped, it takes more than 3 seconds to hit the bottom of the well.
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An engineer wants to calculate how high a rocket starting from rest will be when it
reaches a velocity of 6,500.0 m/s with an acceleration of 389.00 m/s How the rocket be when it meets these conditions?
A moving object's speed and direction vary over time at a certain rate, which is known as acceleration. The term "acceleration" refers to the change in speed of a point or object along a straight line. Due to the constant change in direction, motion on a circle accelerates even while the speed is constant.
Velocity is measured by a specific unit of time and from a specific point of view, and it describes the rate at which an object's orientation changes while it is moving.
The term "Distance Traveled" describes how far an object has travelled during a specified amount of time to get to its destination. Or The path that a body takes to travel a specific distance at a certain speed from one location to another is known as the distance travelled.
Using,
Avg. acceleration (a) = (final velocity - initial velocity(v_i)) / time (t)
time = 6500 / 389 = 16.71 sec
Now, the following equation can be used to determine distance from acceleration: D = v*t + 1/2*a*t². where an is the acceleration, t is the passage of time, and v is the velocity.
D = distance travelled = 54309 m
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15. How far will a rolling ball be if it moves with an average velocity of 5m/s after 12s?
how much work is required to lift a 360 kilogram piano to a window whose height is 10 m from the ground
So, the work required to lift the piano is 36 kJ from the ground.
What connection exists between energy and work?An item needs to receive energy in order to move. Force is one way that energy may be transferred. Work or work done refers to the quantity of energy used by a force to move an item.
Transferring energy into an item to cause some displacement is what is referred to as work. The ability to perform tasks is referred to as energy. The work is consistently the same. Kinetic and potential energy are two examples of the various forms of energy.
The quantity of internal and mechanical energy that things contain fluctuates as a result of work. Energy is contributed to a system or an item when work is done on it. When a system or thing performs labour,
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What electric field e′ would have been required to create a current of 30. 0 amperes in a copper gauge 10 wire with diameter d equal to 0. 259 centimeters?.
The required electric field is 9.58 × 10⁻² N/C
We know that the electric field, E is a product of resistivity and current density
∴ E=jρ ......(i)
Where ρ⇒ Resistivity
j ⇒ Current density
j = I/A
Now, as per the question,
Resistivity of copper, ρ = 1.68 × 10⁻⁸ Ωm
Current, I = 30 ampere
Diameter = 0.259 cm = 0.00259 m
So, Radius, r = Diameter/2
= 1.295 × 10 ⁻⁴m
Now, Cross-sectional area, A = πr²
= 3.14 × (0.001295)²
= 5.26 × 10⁻⁶ m²
Putting the values in equation (i), we get:
[tex]E = 1.68 \times 10^{-8} \times\frac{30}{5.26 \times 10^{-6} }[/tex]
[tex]E= 9.58 \times 10^{-2} N/C[/tex]
Therefore, the required electric field is 9.58 × 10⁻² N/C
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During Piaget's sensorimotor stage, children acquire a
1) theory of mind.
2) concept of conservation.
3) sense of object permanence.
4) capacity for abstract reasoning.
According to the research, the correct option is 3. During Piaget's sensorimotor stage, children acquire a sense of object permanence.
What is Piaget's sensorimotor stage?In Piaget's theory, it is the phase during which children know the world, mainly based on their sensory impressions and their motor activities.
In this sense, it extends from birth to about age two where they acquire object permanence, that is, children learn that objects are separate and distinct entities, having an existence of their own outside of their individual perception.
Therefore, we can conclude that the sensorimotor period is a phase of cognitive growth in children that forms object permanence, thus the correct option is 3.
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three forces, a, b, and c, are acting on the same object with magnitudes a, b, and c, respectively. force a acts to the right, force b acts to the left, and force c acts downward. what is a necessary condition for the object to move straight down?
The necessary condition for the object to move straight down is the magnitude of force C must be greater than the magnitude of forces A or B, so A < C > B.
Here's the complete question:
Three forces, A, B, and C, are acting on the same object with magnitudes a, b, and c, respectively. Force A acts to the right, force B acts to the left, and force C acts downward. What is a necessary condition for the object to move straight down?
A. The magnitude of force A must be greater than the magnitude of force C, so A > C.
B. The magnitude of force A must be greater than the magnitude of force B, so a > b.
C. The magnitude of force A must be equal to the magnitude of force B, so a = b.
D. The magnitude of force C must be greater than the magnitude of forces A or B, so A < C > B.
Three forces, A, B, and C, are acting on the same object with magnitudes a, b, and c, respectively. Force A acts to the right, force B acts to the left, and force C acts downward.
The force C must be greater than the two forces A and B acting on the right and left side of an object because the resultant of the force will move the object downward if the force at C will be greater then the other two forces.
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A cliff diver pushes off horizontally from a cliff and lands in the ocean 2.00s later. How fast was he going when he entered the water?
0m/s
19.0m/s
19.6m/s
20.0m/s
The velocity of the diver upon entering the water is 19.6m/s.
What is the landing speed?We know that in this case, the motion of the diver as he or she pushes down into the water can be obtained from the equation of the motion of an object that is undergoing kinematics in a gravitational filed.
Given that the diver was stationary before diving this implies that the initial velocity is zero and that the final velocity is the velocity with which the diver lands inside the water.
Thus;
v = u + gt
u = 0 m/s
v = gt
v = 9.8 m/s^2 * 2 s
v = 19.6m/s
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can someone please help me with this
The number of products formed in the reaction is one (1).
What is the product of a chemical reaction?
The product of a chemical reaction is the end result of a chemical reaction formed as a result of chemical activity.
The number of products formed during reaction of oxygen and iron metal is given as follows;
metal + oxygen → metal oxide.
4Fe + 3O₂ → 2Fe₂O₃
where;
4Fe is reactant3O₂ is reactantFe₂O₃ is productThis reaction (oxygen and iron metal) is popularly known as rusting, resulting in the formation of iron oxide.
Thus, we can conclude that rusting of iron metal forms one product.
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A 1.20-kilogram frog is at rest on the bank surrounding a pond of water. As the frog leaps from the bank, the magnitude of the acceleration of the frog is 3.0 meters per second2 . Calculate the magnitude of the net force exerted on the frog as it leaps.
Force is the product of mass and acceleration, the magnitude of the net force exerted on the frog as it leaps is 3.6 N
What is Force ?Force can be simply defined as a pull or push. It is the product of mass and acceleration. And it is measured in Newton.
Given that a 1.20-kilogram frog is at rest on the bank surrounding a pond of water. As the frog leaps from the bank, the magnitude of the acceleration of the frog is 3.0 m/s² . The magnitude of the net force exerted on the frog as it leaps will be
F = ma
Where
m = 1.2 Kga = 3 m/s²Substitute the two parameters into the formula.
F = 1.2 × 3
F = 3.6 N
Therefore, the magnitude of the net force exerted on the frog as it leaps is 3.6 N
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PLS HELP, I DIDN'T KNOW THIS WAS DUE UNTIL I CHECKED-AND IM WORKING ON MY OTHER 5 HOMEWORK ASSIGNMENTS, SO I DONT HAVE TIME TO DO THIS!!! I just need the answers you don't need to go into full detail! I'LL GIVE BRAINLIEST!!!
Proton has positive charge whereas neutron has no charge.
What are the difference between a proton and neutron?Proton is a type of subatomic particle that has a positive charge whereas Neutron is a type of subatomic particle that has no charge.
An atom that has lost one or more number of electrons is known as anion.
Isotopes is defined as an element that have the same number of protons i.e. atomic number but different numbers of neutrons i.e. mass number.
Electron is located outside the nucleus of an atom.
Fluorine is that atom which has 9 number of protons so its atomic number is 9.
Atomic number is related to the number of particles in the nucleus of an atom because in the nucleus, proton is present which shows the atomic number of an atom.
There are three parts of an atom i.e. proton, electron and neutron.
The size of electron is about 2 × 10⁻¹⁰ cm, The size of proton is about 0.84×10⁻¹³ cm and the size of neutron is about 1.7×10⁻¹⁵ meters
Electron has negative charge, proton has positive charge and neutron has no charge.
Yes, we can tell about the element if we know about the charge and the number of electrons in it because different atoms has particular number of electrons.
The diameter of a nucleus in scientific notation is 1.6 x 10⁻¹⁵.
The mass of hydrogen atom in whole number is 0.00000000000000000000000000167.
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