Answer :-
Concentrative meditation
Answer:
C. is correct on edge2020
Explanation:
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Why salt is a pure substance and salt solution is considered to be a mixture
Explanation:
Salt (NaCl) is a pure substance because it contains two elements in a fixed ratio and has only one component. On the other hand, salt solution is a mixture, as it has two different components- salt and water.*IT MAY HELP U.Plz marke as a brainlist
Answer:
Mixtures are defined as assemblies of materials that have no chemical bonds between them and thus can usually be separated - like sand and water.
Solutions where a solid material such as salt is completely dissolved are not generally thought of as mixtures because there is loose hydrogen bonding involved in the dissolving of a solute in a solvent.
Solutions lie between pure substances and true mixtures, but are usually not thought of as mixtures.
Explanation:
Compared to visible light, ultraviolet radiation is more harmful to human skin and eyes because ultraviolet radiation has which of the
following characteristics?
A higher frequency
B. longer wavelength
C. higher speed
D. longer period
The ultraviolet radiation should contain the characteristics of the higher frequency.
What is ultraviolet radiation?Ultraviolet (UV) radiation should be a form of unionized radiation that should be emitted from the sun and from artificial sources. Also, it resulted in the risk related to the health in terms of human skin & eyes. It includes the high frequency that represents it contains more energy at the time of emission. Also, it does not consider the high speed, long period, and long wavelength.
Therefore, the correct option is A.
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Two identical stones are simultaneously launched horizontally from two slingshots at
the same height. Stone A is launched with an initial speed of 5 m/s. Stone B is
launched with an initial speed of 1 m/s. Which stone hits the ground first, and where
do they land?)
Answer:
a) Both stones hit at the same time, b) Stones A and B will land at a distance of [tex]2.26\sqrt{y_{o}}[/tex] and [tex]0.452\sqrt{y_{o}}[/tex] meters, respectively.
Explanation:
Each stone experiments a parabolic motion, that is, the combination of a horizontal motion at constant velocity and a vertical uniform accelerated motion due to gravity. We know that each stone is launched horizontally at the same height and from the same initial position.
The equations of motion for each stone are described below:
Stone A
[tex]x_{A} = x_{o} + v_{A,o}\cdot t_{A}[/tex]
[tex]0 = y_{o} + \frac{1}{2}\cdot g\cdot t_{A}^{2}[/tex]
Stone B
[tex]x_{B} = x_{o} + v_{B,o}\cdot t_{B}[/tex]
[tex]0 = y_{o} + \frac{1}{2}\cdot g\cdot t_{B}^{2}[/tex]
a) Which stone hits the ground first?
The stone that hits the ground first has the lowest time. If we know that [tex]v_{A,o} = 5\,\frac{m}{s}[/tex], [tex]v_{B,o} = 1\,\frac{m}{s}[/tex], [tex]x_{o} = 0\,m[/tex] and [tex]g = -9.807\,\frac{m}{s^{2}}[/tex], then the equations of motion are reduced into this:
Stone A
[tex]x_{A} = 5\cdot t_{A}[/tex] (Eq. 1)
[tex]y_{o} -4.905\cdot t_{A}^{2}= 0[/tex] (Eq. 2)
Stone B
[tex]x_{B} = t_{B}[/tex] (Eq. 3)
[tex]y_{o} -4.905\cdot t_{B}^{2}= 0[/tex] (Eq. 4)
From (Eq. 2) and (Eq. 4), we get that [tex]t_{A} = t_{B}[/tex].
Both stones hit at the same time.
b) Where do they land?
From (Eq. 2) and (Eq. 4), we get:
[tex]y_{o} = 4.905\cdot t^{2}[/tex]
The time is cleared within the expression:
[tex]t =\sqrt{\frac{y_{o}}{4.905} }[/tex]
[tex]t \approx 0.452\sqrt{y_{o}}[/tex]
And from (Eq. 1) and (Eq. 3), we get the following equations of motion:
[tex]x_{A}= 5\cdot t[/tex]
[tex]x_{B} = t[/tex]
The horizontal distance taken by each stone is calculated by direct substitution on each expression:
[tex]x_{A} = 2.26\sqrt{y_{o}}\,m[/tex]
[tex]x_{B} = 0.452\sqrt{y_{o}}\,m[/tex]
Stones A and B will land at a distance of [tex]2.26\sqrt{y_{o}}[/tex] and [tex]0.452\sqrt{y_{o}}[/tex] meters, respectively.
A train moves with a uniform velocity of 10 m/s for 8s find the distance traveled by it
Pluto was laying at rest in the sun and notices the smell of meat. He runs at 8 m/s to the smell of the meat. How fast is the dog accelerating in 2 s ?
Given parameters:
Initial velocity(body is at rest) = 0m/s
Final velocity = 8m/s
Time of acceleration = 2s
Unknown:
Acceleration of the dog = ?
Acceleration is defined as the change in velocity with time.
Mathematically;
Acceleration = [tex]\frac{Final velocity - Initial velocity}{time taken}[/tex]
Now input the given parameters and solve;
Acceleration = [tex]\frac{8-0}{2}[/tex]
Acceleration = 4m/s²
The dog is accelerating at a rate of 4m/s²
25pts and brainlyiest if you get right What is the best explanation for how nuclear fusion contributes to the life cycle of a star?
A) Hydrogen in the core of the star is converted to helium by nuclear fusion. When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by fusion, the core becomes stable and expands.
B) Helium in the core of the star is converted to hydrogen by nuclear fusion. When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by fusion, the core becomes unstable and expands.
C) Hydrogen in the core of the star is converted to helium by nuclear fusion. When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by fusion, the core becomes unstable and contracts.
D) Helium in the core of the star is converted to hydrogen by nuclear fusion. When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by fusion, the core becomes unstable and contracts.
Answer:
Hydrogen in the core of the star is converted to helium by nuclear fusion. When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by fusion, the core becomes unstable and contracts.
Explanation: i took the test
Answer:
C if u know u know
Explanation:
A hollow circular nylon pipe (see fig) supports a load PA = 1750 lb, which is uniformly distributed around a cap plate at the top of the lower pipe. A second load PB is applied at the bottom. The inner and outer diameters of the upper and lower parts of the pipe are d1 = 2 in., d2 = 2.375 in., d3 = 2.25 in., and d4 = 2.5 in., respectively. The upper pipe has a length L1= 14in., the lower pipe length is L2 = 16 in. Neglect the self-weight of the pipes. -If PA remains unchanged, find the new value of PB (in lb) so that upper and lower parts have same tensile stress.
Answer:
The value of [tex]P_{B}[/tex] is 4586.20 lb.
Explanation:
Given that,
Load = 1750 lb
The inner and outer diameters of the upper and lower parts of the pipe are
[tex]d_{1}=2\ in[/tex]
[tex]d_{2}=2.375\ in[/tex]
[tex]d_{3}=2.25\ in[/tex]
[tex]d_{4}=2.5\ in[/tex]
Length of upper pipe = 14 in
Length of lower pipe = 16 in
We need to calculate the value of [tex]P_{B}[/tex]
Using tensile stress in upper segment
[tex]\sigma_{1}=\dfrac{P_{A}+P_{B}}{A_{1}}[/tex]....(I)
Tensile stress in lower segment
[tex]\sigma_{2}=\dfrac{P_{B}}{A_{2}}[/tex].....(II)
From equation (I) and (II)
[tex]\dfrca{P_{B}}{A_{2}}=\dfrac{P_{A}+P_{B}}{A_{1}}[/tex]
[tex]P_{B}A_{1}=A_{2}P_{A}+A_{2}P_{B}[/tex]
[tex]P_{B}(A_{1}-A_{2})=P_{A}A_{2}[/tex]
[tex]P_{B}=\dfrac{P_{A}A_{2}}{A_{1}-A_{2}}[/tex]
[tex]P_{B}=\dfrac{\dfrac{P_{A}}{A_{1}}}{\dfrac{1}{A_{2}}-\dfrac{1}{A_{1}}}[/tex]
[tex]P_{B}=\dfrac{\dfrac{1750}{\dfrac{\pi}{4}(d_{2}^2-d_{1}^2)}}{\dfrac{1}{\dfrac{\pi}{4}\times(d_{4}^2-d_{3}^2)}-\dfrac{1}{\dfrac{\pi}{4}\times(d_{2}^2-d_{1}^2)}}[/tex]
Put the value into the formula
[tex]P_{B}=\dfrac{\dfrac{1750}{\dfrac{\pi}{4}((2.375)^2-(2)^2)}}{\dfrac{1}{\dfrac{\pi}{4}\times((2.5)^2-(2.25)^2)}-\dfrac{1}{\dfrac{\pi}{4}((2.375)^2-(2)^2)}}[/tex]
[tex]P_{B}=4586.20\ lb[/tex]
Hence, The value of [tex]P_{B}[/tex] is 4586.20 lb.
When a car traveling at 30m/s hits the gas pedal up to 65m/s in 3.5 sec what is the cars acceleration during that time
Answer:
d
Explanation:
Which question requires the collection of data to answer it?
A. How much water does a peach tree require to produce fruit?
B. Are peaches more delicious than apricots?
C. Do peaches go better with ice cream or yogurt?
D. Why are peaches such a popular fruit?
Answer:
a
Explanation:
b, c, and d are all opinion based, a is the only one that you need factual evidence and observations.
Satement A is the only one for which you require factual information and observations; B, C, and D are all opinion-based options (A) is correct.
What are statistics?Statistics is a mathematical tool defined as the study of collecting data, analysis, understanding, representation, and organization. Statistics is described as the procedure of collecting data, classifying it, displaying that in a way that makes it easy to understand, and analyzing it even further.
It is given that:
The question statement is:
Which question requires the collection of data to answer it?
A. How much water does a peach tree require to produce fruit?
B. Are peaches more delicious than apricots?
C. Do peaches go better with ice cream or yogurt?
D. Why is peached such popular fruit?
From the above statements, A is the only one for which you require factual information and observations; B, C, and D are all opinion-based.
As we know, the act of acquiring and analyzing data on certain variables in an established system allows one to analyze results and respond to pertinent inquiries.
In all academic disciplines, including the physical and social sciences, the humanities, and business, data collecting is a necessary component of research.
Thus, statement A is the only one for which you require factual information and observations; B, C, and D are all opinion-based options (A) is correct.
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definition of motion?
Answer: The action of something moving or being moved
Explanation:
5. How will you separate water from petrol?
Answer:
by a seprating funnel or let it stand it will settle on its own
Explanation:
Answer:
How will you separate water from petrol?
Frieda makes a pyramid of oranges for a display at the grocery store. A few minutes later, Corwin bumps into the display and the oranges spill down.
Which change of state does the motion of the oranges most closely model?
melting
freezing
condensation
sublimation
Answer:
Melting
Explanation:
I just took the quiz and got it right.
Calculate the density of the following material: 500 kg gold with a volume of 0.026 m³
Answer:
If we have large numbers (b is positive) or small numbers (b is negative), then this way ... 1, and V2i = 100 L, n2i = 5 + 2 + 1 = 8 in vessel 2. ... a good working substance in the barometer.
Answer:
the answer is 19230 kg/m3
Explanation:
What is the Nearest Galaxy from the Milky Way
What is the weight (in Newtons) of a person with a mass of 95 kg?
The weight of the person is 931 Newtons.
Given:
The mass of the person is 95 kilograms
To find:
The weight of the person in Newtons.
Solution:
Mass of the person = m = 95 kg
The accleration due to gravity = g = 9.8 m/s^2
The weight of the person = W
[tex]Weight=Mass \times \text{(Acceleration due to gravity)}\\\\W = m\times g\\\\W = 95 kg\times 9.8 m/s^2=931 N[/tex]
The weight of the person is 931 Newtons.
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what happen to tbe brightness when one of the bulb removed from patallel circiut
according to the theory of plate tectonics
Answer:
Alfred Wegener proposed the idea that earths lithospher is divided into tectonic plates.The theory was only accepted after he died.
how has climate change affected Kentucky
Answer:
It will make it hot or cold
Explanation:
A testable prediction is a(n) ______. Group of answer choices a. hypothesis b. experiment c. exercise d. variable
Answer :A testable prediction is also known as a hypothesis.
Explanation: I think
A testable prediction is a hypothesis. (a)
What type of energy change occurs as a match burns?
Answer:
elaborate
Explanation:
you need to elaborate im just doing this for points but u need to elaborate
A crate is dragged across an ice covered lake. The box accelerates at 0.18 m/s2 and is pulled by a 36 N force. What is the mass of the box?
Answer:M=6.48n
Explanation:
M=(0.18)(36)
0.18x36=6.48
M=6.48n
Which is a valid velocity reading for an object?
Answer:
45 m / s North is a valid vector reading for an object.
Explanation:
Then velocity will be defined by x km / hr North. And, magnitude of velocity defines the speed of the body. Although this tells the speed, but there is no description for the direction, so it's not a vector reading
45 m/s north is a valid velocity reading for an object. So, the correct option is B.
What is Velocity?Velocity is explained as displacement in a given amount of time which is a vector quantity, meaning it has both magnitude and direction. When a body travelling on a straight path at a speed of x km / hr in North, then the velocity will be defined by x km / hr North.
Options like 45m/s, 0 m/s north and 0 m/s are speed, null velocity and speed respectively, as it tells speed, but no description for direction, so it is not a vector reading. 45 m / s North tells about the speed as well as its direction and the magnitude of velocity.
Thus, 45 m/s north is a valid velocity reading for an object. So, the correct option is B.
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Your question is incomplete, most probably the complete question is:
Which is a valid velocity reading for an object?
45 m/s 45 m/s north 0 m/s south 0 m/sNewton's first law of motion is also called Law of Inertia explain
Explanation:
Newton's first law of motion states that a body at rest remains at rest, or, if in motion, remains in motion at a constant velocity unless acted on by a net external force. This is also known as the law of inertia. Inertia is the tendency of an object to remain at rest or remain in motion.
Explanation:
Inertia is the tendency of an object toremain at rest or, if moving, to continue its motion in a straight line at uniform velocity.
Newton's First Law of MotionObject will remain at rest or move at uniform velocity unless acted upon by an external force
Hope this is correct and helpful
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If a company like Waste Management collects all of the paper, bottles, plastic, ete in a single bin, how
(True False)
can these materials possibly be recycled?
Answer:
yes they can be recycled
Explanation:
When two compounds or molecules react together to form new substances, they are called
Explain the relationship between citizenship and the right to vote:
A car travels a distance of 36 m in 12 seconds How fast is the car moving?
w
5
4. If it takes 105 calories to warm 100 g of aluminum from 20° C to 25° C, what is the
Specific heat of aluminum?
Answer:
Given parameters:
Amount of heat = 105calories
Mass of aluminium = 100g
Initial temperature = 20°C
Final temperature = 25°C
Unknown:
Specific heat of aluminium = ?
The amount of heat absorbed by a substance is the quantity of heat required to change the temperature of a system by 1°C.
Mathematically;
H = m C (ΔФ)
where H is the amount of heat
m is the mass of the substance
C is the specific heat
ΔФ is the change in temperature
Now to find specific heat capacity, we make it the subject of the formula of the expression;
C = [tex]\frac{H }{m x change in temperature}[/tex]
Change in temperature = Final temperature - initial temperature
= 25°C - 20°C
= 5°C
C = [tex]\frac{105calories}{100g x 5}[/tex] = 0.21cal/g°C
The specific heat of the aluminium is 0.21cal/g°C
how to explain horizontal in words
In astronomy and geography, a direction or plane is said to be horizontal if it is perpendicular to the vertical direction. In mathematics, anything parallel to the horizon is called horizontal. Because vertical is the opposite of horizontal, anything that makes a 90-degree angle (right angle) with the horizontal or the horizon is called vertical. So, the horizontal line is one that runs across from left to right.
I need help Will give five stars please show work please
Answer:
These has anwers and also the solution. You can recheck if you want.
