help i am confused about this riddle.IF NOTHING IS FASTER THAN LIGHT HOW DID THE DARK GET THERE FIRST
Answer:
because darkness is the absence of light, so that means darkness was there before the light came! :)
Explanation:
Can someone help me with this science question
Need help!
Describe the moon's position relative to Earth and the sun during full moon, when the moon appears round and bright.
Your 20-kg brother Mickey is on a see-saw. If you have a mass
of 50-kg and are 2 meters away from the center of the see-
saw, how far out would Mickey have to sit if he wants to apply
the same force onto you that you apply onto him? meters
Answer:
5
Explanation:
To apply the same force as the person, the brother have to sit at a distance of 5 m.
What is meant by torque ?
Torque is defined as the rotational analogue of force. It is the cross product of force and the displacement of the object.
Here,
Mass of the person, m₁ = 50 kg
Mass of the brother, m₂ = 20 kg
Distance of the person, d₁ = 2 m
For the see-saw to get balanced, the torque applied by the two persons each side must be equal.
τ₁ = τ₂
where τ₁ is the torque applied by the person and τ₂ is that applied by the brother.
So, F₁d₁ = F₂d₂
m₁g x d₁ = m₂g x d₂
m₁d₁ = m₂d₂
Therefore, distance of the brother,
d₂ = m₁d₁/m₂
d₂ = 50 x 2/20
d₂ = 5 m
Hence,
To apply the same force as the person, the brother have to sit at a distance of 5 m.
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Water has many properties important to life. The following are all properties exhibited by water. Which one is NOT due to the polar nature of water molecules?
A. clarity
B. adhesion
C. cohesion
D. viscosity
Answer:
B
Explanation:
3.04 in science, compounds
Name and Title:
Include your name, instructor's name, date, and name of lab.
Objectives(s):
In your own words, what is the purpose of this lab?
Hypothesis:
In this section, please include the if/then statements you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.
Procedure:
The materials and procedures are listed in your virtual lab. You do not need to repeat them here. However, you should note if you experienced any errors or other factors that might affect your outcome. Using your summary questions at the end of your virtual lab activity, please clearly define the dependent and independent variables of the experiment.
Data:
Record the composition of each of your compounds below. Be sure to include the number of atoms for each element. An example has been supplied for you.
Compound Name Chemical Formula Sodium (Na) Atoms Calcium (Ca) Atoms Hydrogen (H) Atoms Oxygen (O) Atoms Carbon (C) Atoms Chlorine (Cl) Atoms
Ex: Sodium
hypochlorite NaClO 1 0 0 1 0 1
Conclusion:
Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.
Using two to three sentences, summarize what you investigated and observed in this lab.
Why do you believe knowing how elements and compounds react together is essential in everyday matters?
Some elements are more "reactive" than other elements; why do you think this is?
Choose one of the compounds from the table and explain how you know the numbers of atoms in your formula.
Is it possible for two different compounds to be made from the exact same two elements? Why or why not? With a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?
Name and Title:
name, teacher's name, date, chemical components lab.
Objectives(s):
The purpose of this lab was to use elements and make chemical compounds.
Hypothesis:
If I use sodium, carbon, and hydrogen, then I can make at least 5 new compounds in 5 minutes.
Procedure:
The independent variable is the number and types of elements I picked for my compounds. The dependent variable is the types of compounds made.
Data:
Record the composition of each of your compounds below. Be sure to include the number of atoms for each element. An example has been supplied for you.
Compound Name
Sodium hydride
Chemical Formula
NaH
Sodium (Na) Atoms
1
Calcium (Ca) Atoms
0
Hydrogen (H) Atoms
1
Oxygen (O) Atoms
0
Carbon (C) Atoms
0
Chlorine (Cl) Atoms
0
Tricarbon (c3) Atoms (MY TEACHER TOLD ME TO ADD THIS ONE)
0
Compound Name
Methylene (carbene)
Chemical Formula
CH2
Sodium (Na) Atoms
0
Calcium (Ca) Atoms
0
Hydrogen (H) Atoms
2
Oxygen (O) Atoms
0
Carbon (C) Atoms
1
Chlorine (Cl) Atoms
0
Tricarbon (c3) Atoms (MY TEACHER TOLD ME TO ADD THIS ONE)
0
Compound Name
Sodium carbide
Chemical Formula
Na2C2
Sodium (Na) Atoms
2
Calcium (Ca) Atoms
0
Hydrogen (H) Atoms
0
Oxygen (O) Atoms
0
Carbon (C) Atoms
2
Chlorine (Cl) Atoms
0
Tricarbon (c3) Atoms (MY TEACHER TOLD ME TO ADD THIS ONE)
0
Compound Name
Diatomic carbon
Chemical Formula
C2
Sodium (Na) Atoms
0
Calcium (Ca) Atoms
0
Hydrogen (H) Atoms
0
Oxygen (O) Atoms
0
Carbon (C) Atoms
2
Chlorine (Cl) Atoms
0
Tricarbon (c3) Atoms (MY TEACHER TOLD ME TO ADD THIS ONE)
0
Compound Name
Hydrogen gas
Chemical Formula
H2
Sodium (Na) Atoms
0
Calcium (Ca) Atoms
0
Hydrogen (H) Atoms
2
Oxygen (O) Atoms
0
Carbon (C) Atoms
0
Chlorine (Cl) Atoms
0
Tricarbon (c3) Atoms (MY TEACHER TOLD ME TO ADD THIS ONE)
0
Compound Name
acetylene
Chemical Formula
C2H2
Sodium (Na) Atoms
0
Calcium (Ca) Atoms
0
Hydrogen (H) Atoms
2
Oxygen (O) Atoms
0
Carbon (C) Atoms
2
Chlorine (Cl) Atoms
0
Tricarbon (c3) Atoms (MY TEACHER TOLD ME TO ADD THIS ONE)
0
Compound Name
Tricarbon
Chemical Formula
C3
Sodium (Na) Atoms
0
Calcium (Ca) Atoms
0
Hydrogen (H) Atoms
0
Oxygen (O) Atoms
0
Carbon (C) Atoms
3
Chlorine (Cl) Atoms
0
Tricarbon (c3) Atoms (MY TEACHER TOLD ME TO ADD THIS ONE)
0
Compound Name
Diamond
Chemical Formula
C,Crystal
Sodium (Na) Atoms
0
Calcium (Ca) Atoms
0
Hydrogen (H) Atoms
0
Oxygen (O) Atoms
0
Carbon (C) Atoms
1
Chlorine (Cl) Atoms
0
Tricarbon (c3) Atoms (MY TEACHER TOLD ME TO ADD THIS ONE)
3
worked this out and it should be right
Only 5 questions plz answer.
evaluate the statement heavy things sink and light things float. is the statement true or false? if false rewrite the statement to be true
Answer:
False
Explanation:
It depends on the density of an object, not the wight.
Answer: it’s false
Explanation: false
A ship is heavy, but it sinks, right? If something sinks or floats is based off of its density.
Things that are less dense than the liquid they are on will float
What is the difference between the way matter responds to a transverse wave and a longitudinal wave?
A. Matter moves in the same direction in a longitudinal wave, and at right angles to the direction of a transverse wave.
B. Matter moves at right angles to the direction of a longitudinal wave, and at right angles to the direction of a transverse wave.
C. A longitudinal wave does not need matter through which to travel, while a transverse wave does.
D. A longitudinal wave needs matter through which to travel, while a transverse wave does not.
This is an example of a(n)
A) Aquatic biome.
B) Terrestrial biome.
C) Aquatic biosphere.
D) Terrestrial Biosphere.
Answer:
Its A.
Correct me if I'm wrong.
I am not good at mysteries so please help!!
Answer:
The nephew
Explanation:
The dog's foot prints are overlapping the shoes that are overlapping the tire marks from 3 different tires, if the dog is his seeing dog then it would make sense that the dog's foot prints are next to his and they're going in the same direction, and since the dog's footprints overlap the others it means that they were there last.
People were confused so I'll resay it. The dog is the nephew's seeing dog, so he walks beside him. And if the dog's foot prints are overlapping all of the other's, that means the dog was there after all of the rest of them, and if the nephew is with the dog then the nephew was there last.
I need help ;-;
"Compare the first and third quarter of the moon cycle as seen from the Northern Hemisphere. You must discuss the relative positions of the sun, moon, and earth in your response"
Isaac Newton believed that light was made of
waves.
particles.
dust.
gravity.
Answer:
I believe the answer is Particles
Explanation:
let me know if i'm wrong
Isaac Newton believed that light was made of particles.
What is light?Light or visible light is electromagnetic radiation that can be perceived by the human eye.Visible light is usually defined as having wavelengths in the range of 400 – 700 nanometers (nm), corresponding to frequencies of 750 – 420 terahertz, between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths)Given is the theory of light by Sir Isaac Newton.
Corpuscular Theory →
According to Newton's corpuscular theory of light, light is composed of very tiny, elastic and rigid particles called corpuscles. When this corpuscles enters into our eye, we get the sensation of light or sensation of vision.Therefore, Isaac Newton believed that light was made of particles.
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