Answer:
scientific inquiry has not displaced faith, intuition, and dreams. These traditions and ways of knowing have emotional value and provide moral guidance to many people. But hunches, feelings, deep convictions, old traditions, or dreams cannot be accepted directly as scientifically valid.
Katie claims that steel is a homogeneous mixture, even though it looks like a
pure substance. Which statement, if true, would support her claim?
A. Steel contains only iron atoms.
B. Steel is made from iron atoms with clumps of carbon atoms
mixed in.
C. Steel contains carbon and iron atoms, evenly mixed.
D. Steel is made of different compounds distributed unevenly.
Answer:
D. Steel is made of different compounds distributed unevenly.
Explanation:
The statement that will support her claim that steel is a homogenous mixture is that steel is made up of different compounds distributed unevenly.
Steel is an alloy of carbon and iron in its composition. Alloys are classified as mixtures. Their constituent reacts differently to changed medium. The iron in steel does not chemically bond with the carbon.The true statement according to Katie's claim is Steel is made from iron atoms with clumps of carbon atoms mixed in. (option b)
Steel is an alloy composed mainly of iron and carbon, along with other elements in smaller quantities. An alloy is a type of homogeneous mixture where two or more substances are combined at the atomic or molecular level. In the case of steel, it is made by mixing iron atoms with clumps of carbon atoms, and possibly other elements, throughout the material. This means that the carbon and iron atoms are evenly distributed and thoroughly mixed, creating a uniform composition throughout the steel.
Option B is the statement that would support Katie's claim. It correctly describes that steel is made from iron atoms with clumps of carbon atoms mixed in, forming a homogeneous mixture despite its pure-looking appearance.
So, the correct option is (b).
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Another pure substance, compounds contain atoms from two or more elements chemically bonded,
When atoms bond, they cannot be separated physically. Compounds may have different properties than
the elements they're made of. Water, for example, is a compound formed from hydrogen and oxygen.
Water is a liquid at room temperature, while oxygen and hydrogen are both gases.
Which of the following best describes compounds?
A They can only be separated chemically.
B. They are always liquid at room
temperature.
C. They contain the atoms of just one element.
D. They have the same properties as their
elements.
Answer:
I think the right answer is A
A student performed the following reaction: 2 A + B2 --> 2AB
How many grams of AB are produced when 88 g of A reacts with 28 g B2?
Answer:
116g
Explanation:
Given parameters:
Mass of A = 88g
Mass of B₂ = 28g
Unknown:
Mass of AB produced = ?
Solution:
The reaction expression is given as:
2A + B₂ → 2AB
According to the law of conservation of matter "matter is neither created nor destroyed but changed from one form to another".
In retrospect;
Mass of A + Mass of B₂ = Mass of AB
Now insert the parameters and solve;
Mass of AB = 88g + 28g = 116g
A school bus has a mass of 18,200 kg k g . The bus moves at 15.5 m/s m / s .
Answer:
whatttt
Explanation:
what do u ask boy? just ask.
An owl has a mass of 4.00 kg. It dives to catch a mouse, losing 800.00 J of its GPE. What was the starting height of the owl, in meters?
Answer:
height =20m
Explanation:
gpe=mgh
800=4×10×x
40x=800
x=20
answer them all please
Answer:
respiratory = nose
circulatory = heart
digestive = mouth
nervous = brain
which term describes energy stored inside the nucleus of an atom?
a. light energy
b. nuclear energy
c. chemical energy
d. thermal energy
Answer:
here ya go.
Explanation:
I'm not very good and science or math, but I try my best.
Two identical spheres (of equal mass) a distance of 10 meters apart exert a force of gravity of 0.00050 N on each other. What are their masses?
Answer:
The gravitational force between two objects is written as:
F = G*m1*m2/r^2
Where:
G = 6.67*10^(-11) m^3/kg*s
m1 and m2 are the masses of the objects.
r is the distance between the objects.
In this case, we know that:
F = 0.0005 N
r = 10m
and because the two spheres are identical, we have that:
m1 = m2 = M
then we have the equation:
0.0005 N = (6.67*10^(-11) m^3/kg*s)*(M^2/(10m)^2)
0.0005 N*(10m)^2/(6.67*10^(-11) m^3/kg*s) = M^2
√( 0.0005 N*(10m)^2/(6.67*10^(-11) m^3/kg*s) ) = M = 27,379.3 kg
The mass of each sphere is 27,379.3 kg
Which characteristic is related to kinetic energy but not potential energy?
O A. An object's shape
O B. An object's speed
O C. An object's mass
O D. An object's height
Will give brainiest to correct answer
Answer:
B
Explanation:
Since
K.E = 1/2 mv^2
P.E = mgh
A runner with a mass of 78.6 kg, moving at a speed of 8.8 m/s, rounds a bend with a radius of 25 m. What is the centripetal force needed to keep this runner on the curve and what supplies this force?
Answer: Does this help???
The centripetal force is required.
The centripetal force is 243.47 N.
m = Mass of runner = 78.6 kg
v = Velocity of runner = 8.8 m/s
r = Radius = 25 m
Centripetal force is given by
[tex]F_c=\dfrac{mv^2}{r}\\\Rightarrow F_c=\dfrac{78.6\times 8.8^2}{25}\\\Rightarrow F_c=243.47\ \text{N}[/tex]
The centripetal force is 243.47 N.
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12 The deepest part of the oceans in the world is the Mariana Trench in the Pacific Conan It is 11, 000 m deep How long will it take for sound transmitted by a ship to the surface of water above the trench to be selected? (Speed of sound in senator -1500 mis)
Answer:
Explanation:
Time taken by sound to come back to surface after reflection from trench
= distance travelled / speed of sound
= 2 x 11000 / 1500
= 14.66 s
In one way , sound will take half the time = 7.33 s .
What is usually true about the relationship between the speed mechanical waves travel and the temperature of the medium?
What voltage is needed to pass a current of 0.5A through a 5k Ω resistor? Show your solution
plzzzzzzzz i need helppppp:)))))
Answer:
V = 2500V
Explanation:
Given the following data;
Current = 0.5A
Resistance = 5K ohms = 5*10³ = 5000 ohms
To find the voltage;
Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.
Mathematically, Ohm's law is given by the formula;
[tex] V = IR[/tex]
Where;
V represents voltage measured in voltage. I represents current measured in amperes. R represents resistance measured in ohms.Substituting into the equation, we have;
[tex] V = 0.5 * 5000 [/tex]
V = 2500 V.
Therefore, the voltage needed to pass the current is 2500 volts.
HURRRRRRRRRRRYYYYYYYYYYYYYYYYYYYYY
If a substance containing charged ions and electrons can be compressed so that the particles have less space between them, the substance is a
A. gas
B. plasma
C, solid
D. liquid
The wavelength of a wave is 12 cm and its frequency is 120 Hz. What is its speed?
The speed of the wave is 14.4 m/s.
What is speed?Speed is the rate of change of distance.
To calculate the speed of the wave, we apply the formula below.
Formula:
v = λf............. Equation 1Where:
v = speed of the waveλ = wavelength of the wavef = frequency of the wave.From the question,
Given:
λ = 12 cm = 0.12 mf = 120 Hz.Substitute these values into equation 1
v = 0.12(120)v = 14.4 m/sHence, the speed of the wave is 14.4 m/s.
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This player along with the point guard, are considered the leaders of the team.
basketball
Answer:
Shooting guard I think
Explanation:
Answer:
the center
Explanation:
i had it on my test
newtons law of physics, please help
no clue what the question is but pop off i guess
Answer: (from top to bottom)
350 N, 80 kg, 10 m/s^2, 80 kg, -15 m/s^2, -3000 N
Explanation:
Force = Mass*Acceleration (aka F = ma)
Using algebra, you can find the variables/unknown values.
kinetic energy depends on what two things?
Answer:
It depends on
1 The energy of the body
2 Motion
Explanation:
✌♥️✌♥️
the mass of the moon is 7.35x10^22 kg and the mass of the earth is 5.97x10^24 kg. the moon’s orbit distance is 3.84x10^8 m. what is the gravitational force on the moon by the earth? what is the gravitational force of the earth on the moon?
Answer:
moon by earth is 1.62/s and squre in mathematical terms and earth by moon is the same answer
Compared to the earth, which has a mass of 5.97 into 10 to the power of 24 kilograms, the moon has a mass of 7.35 into 10 to the power of 22 kilograms. The moon is 3.84 into 10 to the power 8 meters away from the earth, but this is from the center, where the earth cannot see it. We have to judge by the moon.
What is the gravitational force on the moon by the earth?The moon's mass divided by its orbital distance will determine the magnitude of both forces, which will be equal in strength but acting in opposite directions. It is commonplace.
This can be solved within the square as a whole, giving us a result of 19.85 into 10 to the power of 19 newtons. This force will be roughly equivalent to 1.99 into 10 and will have a magnitude of 20 newtons. This will turn out to be the solution to the issue.
The earth will be the moon, and both forces will be moving in the same direction. The force on the moon and the force on earth are the same.
Therefore, The moon's mass is 7.35 into 10 to the power 22, the earth's g square mass is 5.97 into 10 to the power 24, and the r value is 3.84 into 10 to the power 8. Moon by earth is 1.62/s.
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What are some Non-Examples of Seismology
Answer:
Non- examples will include processes that are not involving earthquakes or tectonic plates movements.
Explanation:
Seismology is the scientific study of earthquakes and internal structure of the earth. This study involves geographical distributions , origins, the effects and possible predictions of earthquakes. Seismology study can further include the movement of Earth's tectonic plates.
Example of seismology is geological surveying.
Answers the questions
1. At what distance did the object start to move ?
Answer:
it started to move a 1 second
Answer:
at one second :p
Explanation:
A teacher will never give a student any additional information about a test in a one-on-one meeting because it would not be fair to the other students. Please select the best answer from the choices provided T F
Answer:
False
Explanation:
The answer is False that, additional information about a test in a one-on-one meeting would not be fair to the other students.
What is the meeting like?A meeting is a Group of two or more individuals who have been asked to get together too to speak verbally and work toward a similar objective, such as exchanging information or coming to a result. A meeting, according to one Merriam-Webster dictionary, is an act or process of getting together, such as a gathering for a shared cause.
Any event scheduled at a hotel, convention hall, or other location specifically designed for such gatherings may be referred to as a "meeting" by planners and other meet-and-greet specialists.
Meetings can include lectures (one presentation), seminars (typically several lectures, a comparatively tiny audience, one day), conferences (mid-size, each or more days), congresses (large, several days), exhibitions or trade shows (with manned stands being visited by passersby), workshops, trainings, team-building activities, and kick-off events.
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A 5 kg mass is oscillating on a spring with a time period of 2.8 seconds. What is the spring constant k of the spring?
Answer:
k = 25.18 N/m
Explanation:
Simple Harmonic Oscillator
It consists of a weight attached to one end of a spring being allowed to move forth and back.
If m is the mass of the weight and k is the constant of the spring, the period of the oscillation is given by:
[tex]\displaystyle T=2\pi {\sqrt {\frac {m}{k}}}[/tex]
If the period is known, we can find the value of the constant by solving for k:
[tex]\displaystyle k=m\left(\frac{2\pi}{T}\right)^2[/tex]
Substituting the given values m=5 Kg and T=2.8 seconds:
[tex]\displaystyle k=5 \left(\frac{2\pi}{2.8}\right)^2[/tex]
k = 25.18 N/m
Which is an action that can cause an object to move or change its state of motion?
A. Energy
B. Force
C. Equilibrium
D. Inertia
Answer: B. Force
yes the answer is force
Explanation:
Force is a push or pull which can change the state of body whether it is rest or in motion or tries to change the state of body.
A meteorite strikes the Moon at the speed of 11 km/s. It has KE of 60,500,000 J. What will be its mass?
What do car manufacturers do to reduce the fluid friction acting on a car
Answer:
The fluid friction or drag can be reduced are minimised by giving special shape called streamlined shape to the objects which Move through fluids like air or water
Answer:
ggggggggggggggggggggggggg
plz. help ) An auto accelerates forward from 7.0 m/s at a uniform
0.71 m/s?. It travels a distance of 1033 m while
accelerating
(a) How fast is the auto moving just as it is traveled
the 1033 m?
(b) How many seconds did it take to travel the 1033 m?
Answer:
The auto is moving at 38.9 m/s
The auto took 45 seconds to travel the 1033 m
Explanation:
Constant Accelerated Motion
it's a type of motion in which the velocity of an object changes uniformly in time.
The relationship between initial and final speeds is calculated by the equation:
[tex]v_f=v_o+at\qquad\qquad [1][/tex]
Where a is the constant acceleration, vo the initial speed, vf the final speed, and t the time.
Another useful equation allows us to calculate the distance x traveled by the object:
[tex]\displaystyle x=v_o.t+\frac{a.t^2}{2}\qquad\qquad [2][/tex]
(a)
Solving [1] for t and substituting into [2] we find the equation:
[tex]v_f^2=v_o^2+2ax[/tex]
This last equation will be used to solve the first part of the problem which gives the initial speed of vo=7 m/s, the uniform acceleration as a=0.71 m/s^2 and the distance traveled as x=1033 m, thus substituting:
[tex]v_f^2=7^2+2(0.71)(1033)[/tex]
[tex]v_f^2=49+1466.86=1515.86[/tex]
Thus:
[tex]v_f=\sqrt{1515.86}=38.9[/tex]
[tex]v_f=38.9 m/s[/tex]
The auto is moving at 38.9 m/s
(b)
To calculate the time, we solve [1] for t:
[tex]\displaystyle t=\frac{v_f-v_o}{a}[/tex]
[tex]\displaystyle t=\frac{38.9-7}{0.71}=45[/tex]
The auto took 45 seconds to travel the 1033 m
Help please!
Two rope tows operate on the same ski slope. When both are operating with equal loads, Tow A can move faster than
Tow B.
-Which does the most work?
1. they both do the same work
2. Tow B
3. Tow A
-Which has the most power?
1. they both have the same power
2. Tow B
3. Tow A
Answer: They both do the same amount of work but Tow A has more power
Explanation:
A mercury thermometer is used to measure the temperature of boiling water but why do you think the mountainous travel to cold reason use alcohol thermometer
Because mercury freeze in cold temperatures
A 30kg dog runs at a speed of 15 m/s. What is the dog's Kinetic energy?