Answer:
Preoperational
Explanation:
According to Piaget's theory of cognitive development, the preoperational stage is the second stage. This stage includes children between the age group of 2 to 7 years. Children can understand conservation tasks and learn to manipulate various symbols during this stage.
So, the answer is the preoperational stage.
Answer:
B Preoperational
Explanation:
This is the answer the person above is correct!
This is for edge 2021/2022
Hope this helps!!
Circular orbit
What is the answer? You might have to click on the picture.
Choice-B is a relevant statement, although we can't see enough of the picture to actually know what's going on.
A good example of this scenario is our own moon. Because of the Sun's gravitational influence, the Moon's orbit around the Earth is not a circle or an ellipse.
Compared to Earth's moon, the moons of Mars are
equal in size.
larger in size.
made of different substances.
smaller in size.
Question 7 of 10
Through which material will sound tend to travel fastest?
A. Ice
B. Steam
C. Liquid
D. Sound travels at the same speed in every material.
SUBMIT
a car whose initial speed is 30 seconds m / s slows uniformly to a stop in 5.00 seconds what was the cars displacement
Answer:
60
Explanation:
1 point
Which of the following collections of properties contain only features which can be changed by a resultant force?
The collections of properties which contain only features that can be changed by a resultant force is: speed, shape and direction.
A resultant force refers to a total effective force that has both magnitude and direction, which is mainly obtained through the addition of two (2) or more forces.
Hence, a resultant force is a single force acting on an object or physical body and it is obtained by combining two (2) or more forces.
Generally, there are some properties that changes when a resultant force is applied on them and these include:
Speed.Shape.Direction.Velocity.Read more: https://brainly.com/question/17742679
What are two properties that lead to ElectroMagnetic Interactions? please help this is due very soon!!!
Answer:
Electric charge. A fundamental property that leads to the electromagnetic interactions among particles that make up matter.
What happens to the
gravitational force between
Sal and his grandmother?
A. The gravitational force would stay the
same.
B. The gravitational force would decrease.
C. The gravitational force would increase. pls fast
The pilot directs the aircraft to fly due north at 600km/h. A side-wind blows at
100km/h towards the east. What will be the aircraft's resultant velocity? (Give both its
speed and direction)
Answer:
678.2 km/h and 80.54° north of east
Explanation:
From the question,
Using pythagoras theorem,
a² = b²+c²..................... Equation 1
Where a = resultant velocity
Given: b = 600 km/h, c = 100 km/h
Substitute these values into equation 1
R² = 600²+100²
R² = 360000+10000
R² = 460000
R = √460000
R = 678.2 km/h.
And the direction is
tanθ = 600/100
tanθ = 6
tanθ = 6
θ = tan⁻¹(6)
θ = 80.54°.
Hence the resultant velocity of the aircraft is 678.2 km/h and 80.54° north of east
Which conclusion about the atom can be drawn from Rutherford’s gold foil experiment?
A.Has a zero oxidation #
B.Has a neutral charge
C.Has a small negative center
D.Has a small positive center
Kinesiology is the study of:
Question 4 options:
Human movement
The study of bones.
The study of team sports.
answer is human movement
i hope this helps
Answer:
Human movement
Explanation:
Kinesiology is the study of the mechanics of body movements to provide information about the state of health of all body organs and systems.
When someone asked you if you have a special talent.
Answer:
lowkeyyyy
explanation:
What is the unit for resistance?
A. Ohms
B. Watts
C. Volts
D. Amperes
Answer:
The unit for resistance is ohms(Ω).
A. Ohms
Hope it will help :)
A car is traveling at 75 m/s. 50 seconds later it is traveling at 25 m/s. What is the car’s acceleration?
Answer:
a = -1 m/s^2
Explanation:
Vi = 75 m/s
Vf = 25 m/s
t = 50 s
Plug those values into the following equation:
Vf = Vi + at
25 = 75 + 50a
---> a = -1 m/s^2
What will happen if you heat a liquid to high temperatures?
Group of answer choices
A. The molecules slow down and gain more energy
B. The molecules speed up and contain less energy
C. The molecules start to slow down and contain less energy
D.The molecules speed up and gain more energy
A physics teacher is reheating her leftover pizza lunch in the very old teacher breakroom microwave. The microwave is so old that it doesn't even turn the food as it cooks. When the teacher takes her food out and eats it, she discovers that parts of the pizza are scalding hot, while other parts are still very cold. She explains to the students that a microwave works by producing standing waves that result in heating. She asks the students to explain why some parts of the pizza are hot while others are still cold. Below are their responses:
Answer: At the antinodes of a standing wave, the wave is shaking very rapidly, causing those parts of the pizza to get hot. At the nodes, the wave is not shaking much at all, causing those parts of the pizza to stay cold."
Explanation:
antinodes vibrate and are the opposite of nodes which are stationary.
Some parts of the pizza are hot while others are still cold. Because the antinodes of a standing wave shake very quickly, causing the hot spots on the pizza to appear.
What are the differences between nodes and antinodes?The fact that there are locations along the medium that appear to be standing still is a feature of every standing wave pattern.
The term "node" refers to these sites, which are also known as "points of no displacement." Other sites along the medium are subjected to vibrations with substantial positive and negative displacements.
During each vibrational cycle of the standing wave, these are the locations that experience the most displacement. These points are termed "antinodes" because they are the polar opposites of nodes.
The antinodes of a standing wave shake very quickly, causing the hot spots on the pizza to appear. The wave isn't moving very much at the nodes, therefore those areas of the pizza stay cold."
Hence some parts of the pizza are hot while others are still cold.
To learn more about antinodes refer to the link;
https://brainly.com/question/2608876
Please help me I don’t get how to do it!!! A ray of light has a wavelength
433 nm in water (n = 1.33). What
is its wavelength in a vacuum?
(Remember, the wavelength is longer in
a vacuum.)
(Unit = nm)
Answer:
The wavelength of the light in a vacuum is 575.89 nm
Explanation:
The given parameter in the are;
The wavelength of the ray of light in water, λ₁ = 433 nm
The refractive index of water, n₁ = 1.33
The relationship between wavelength, λ, and refractive index, 'n', is presented as follows;
λ₁·n₁ = λ₂·n₂
Where;
λ₁ and λ₂ are the wavelength of the wave within the two mediums
n₁ and n₂ are the respective refractive indices of the mediums
The refractive index of vacuum, n₂ = 1
Let λ₂ represent the wavelength of light in vacuum
Therefore, we have;
1.33 × 433 nm = 1 × λ₂
∴ λ₂ = 1.33 × 433 nm/1 = 575.89 nm
Therefore, the wavelength in a vacuum, λ₂ = 575.89 nm
Answer: 576
Explanation: Its correct for acellus!
What is the chemical name of SiF4? sulfur fluoride silicon fluoride sulfur tetrafluoride silicon tetrafluoride
Answer:
Silicon tetrafluoride
Explanation:
The symbol Si represents the element silicon, as shown in the periodic table.
The are 4 fluorines, so the prefix for fluoride must have tetra-
The increasing speed of a falling object is caused by
gravity
force
mass
speed
(pick one)
Answer:
gravity
Explanation:
Technically it would be mass or speed because it depends on ow big or small it is, but if you break it down it will be due to gravity as it gets stronger
if a person can jump maximum along distance of 3m ,on the earth how far could be jump on the moon where acceleration due to gravity is 1÷16 of that on the earth
Answer:
The person can jump 48 m on the Moon
Explanation:
The question parameters are;
The maximum long jump distance of a person on Earth, [tex]R_{max}[/tex] = 3 m
The acceleration due to gravity on the Moon = 1 ÷ 16 of that on Earth
The distance the person can jump on the Moon is given as follows;
A person performing a jump across an horizontal distance on Earth (under gravitational force) follows the path of the motion of a projectile
The horizontal range, [tex]R_{max}[/tex], of a projectile motion is found by using the following formula
[tex]R_{max} = \dfrac{u^2}{g}[/tex]
Where;
g = The acceleration due to gravity = 9.8 m/s²
Therefore, we have;
[tex]R_{max} = 3 \, m = \dfrac{u^2}{9.8 \, m/s^2 }[/tex]
u² = 3 m × 9.8 m/s² = 29.4 m²/s²
Therefore, on the Moon, we have;
The acceleration due to gravity on the Moon, [tex]g_{Moon}[/tex] = 1/16 × g
∴ [tex]g_{Moon}[/tex] = 1/16 × g = 1/16 × 9.8 m/s² ≈ 0.6125 m/s²
[tex]R_{max \ Moon} = \dfrac{u^2}{g_{Moon}} = \dfrac{29.4 \ m^2/s^2}{0.6125 \, m/s^2 } \approx 48 \, m[/tex]
The maximum distance the person can jump on the Moon with the same velocity which was used on Earth is [tex]R_{max \ Moon}[/tex] ≈ 48 m
aerosol can carry warnings on their labels that say not to incinerate (burn ) them or store the cans above a certain temperature. the gas in a used aerosol can is at a pressure of 103 KPA at 25 °c. if the can is thrown into a fire, what will the pressure be when the temperature reaches 928°c?
Answer:
The volume is the same apply this formula Pv=nRT shows direct proportionality this is what shows so we can take only PV=T and v stays the same.
identify global climate zones and characteristics of each
research the different time zone around the world, and characteristics of each
This force is a pull between all objects. It is the force that gives us weight here on Earth. And, if we throw a rock off of a cliff, it is the force that causes the rock to fall to Earth. What is this force?
Answer:
Gravity.
Explanation:
Gravity is considered to be a universal force of attraction which acts between all objects that has both mass, energy and occupy space. Therefore, it acts in such a way as to bring objects together.
Additionally, the gravity of earth makes it possible for all physical objects to possess weight.
This ultimately implies that, this force is a pull between all objects. It is the force that gives us weight here on Earth. And, if we throw a rock off of a cliff, it is the force that causes the rock to fall to Earth.
What increase in temperature is needed to increase the length of an aluminum meterstick by 1.0 mm?
42 K
24K
Answer:
42k
Explanation:
The increase in temperature is needed to increase the length of an aluminum meter-stick by 1.0 mm is 42 K. The option 1 is the correct option.
What is thermal expansion?Thermal expansion is the property of the matter to change its shape, size, length, volume, density etc with change in the temperature.
The thermal expansion can be calculate as,
[tex]\Delta L=aL\Delta T[/tex]
Here, [tex]L[/tex] is the original length, [tex]\Delta T[/tex] is the change in the temperature and [tex]a[/tex] is the coefficient of the expansion.
Given information-
The change in the length of the aluminum mater-stick is 1.00 mm.
Let the initial size of the aluminium mater-stick is 1.00 m or 1000 mm . The thermal expansion coefficient of aluminium is [tex](2.4\times10^{-5})[/tex] per unit Kelvin.
Put the values in the above formula as,
[tex]1=(2.4\times10^{-5})\times 1000\times\Delta T[/tex]
Solve for temperature as,
[tex]\Delta T=\dfrac{1}{(2.4\times10^{-5})\times 1000} \\\Delta T=42K[/tex]
Hence the increase in temperature is needed to increase the length of an aluminum meter-stick by 1.0 mm is 42 K. The option 1 is the correct option.
Learn more about the thermal expansion here;
https://brainly.com/question/1166774
If an object straight down falls 30m in 2 sec , how far will falls in 4 sec , what is the tail wind and headwind
Answer:
60 sec
Explanation:
60m because in every 30min in 2sec so 30 × 2= 60 min
Answer these questions please and you will get the brain list
I am using the equation F=ma (force equals mass times acceleration) to solve these problems.
1. You are looking for force, and have mass and acceleration. You just plug in the values for mass and acceleration to get the force needed.
F=(15kg)(5m/s^2)
F=75N
2. Again, you are looking for force, and just need to plug in the values for mass and acceleration
F=(3kg)(2.4m/s^2)
F=7.2N
3. In this problem, you have force and mass, but need to find acceleration. To do this, you need to get acceleration alone on one side of the equation - divide each side by m. Your equation will now be F/m=a
a=(5N)/(3.7kg)
a=18.5m/s^2
I did not use significant figures. Let me know if you need to do that and need any help on that. Hope this helps!
+
CaCl 2
+
_C2HCl3
C2H2C14
H 20
+
Ca(OH) 2 →
... I don’t understand H E L P
State Newton's three laws of motion.
Answer:
Newton's first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.
Newton's second law states that the acceleration of an object is directly related to the net force and inversely related to its mass. Acceleration of an object depends on two things, force and mass.
Newton's third law states that if an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A. This law represents a certain symmetry in nature: forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself.
Explanation:
the body of mass 17 kg is attached to a string of length of 3.4 m is whirled round in vertical circle .if the tension in the string at the lowest point is 300N .calculate the speed of the body
Answer:
Speed of the body = 5.1652 m/s
Explanation:
Given:
Mass M = 17 kg
Length of string = 3.4 m
Tension in the string = 300N
Find:
Speed of the body
Computation:
T - mg = mv² / R... [R = L]
So,
T - mg = mv² / L
300 - 17[9.8] = [17][v]² / [3.4]
133.4 = [17][v]² / [3.4]
v² = 26.68
Speed of the body = 5.1652 m/s
the mass number is the sum of the ____ and ____ in an atom
Answer: The mass number is the sum of the number of protons and neutrons and can be used, with the atomic number, to find the number of neutrons.
Explanation: