Theories are built upon testing many ________?
A).laws.
B).Hypothese.
C).Facts.
Answer:
B. Hypothese
Explanation:
Answer:
B.Hypothese
Explanation:
i don't know but that's first came in my mind
Which statement is true because of Newton's second law?
Group of answer choices
You have to push a full shopping cart with more force than an empty shopping cart.
A soccer ball will not move until someone kicks it.
For every action there is an equal and opposite reaction.
A skateboarder travels at a constant speed when there are balanced forces acting on him.
Answer:
You have to push a shopping cart with more force than an empty shopping cart.
Explanation:
Hope this helps! Plz vote brainliest
The difference between a mixture and a solution is that mixtures cannot be easily separated. True O False.
Answer:
False
Explanation:
Mixtures are a solute and solvent that are not chemically combined, therefore easily separated. Solutions are a solute and solvent combined together.
What is a bowl-shaped crater thought to
be caused by the collapse of an empty
magma chamber?
Answer:
pyroclastic flow. a superheated cloud of gas and volcanic ash that travels swiftly down a volcanic slope. What is a bowl-shaped crater thought to be caused by the collapse of an empty magma chamber? caldera.
Explanation:
can I gave brainliest
Which of the following correctly describes solid, liquid, and gas states of matter?
Explanation:
In solids, the particles are tightly packed together. In liquids, the particles have more movement, while in gases, they are spread out. Particles in chemistry can be atoms, ions or molecules. It is important to understand the particle nature of matter.
what causes the greenhouse affect?
it’s actually environmental science
What is the effect of constant stirring on the solubility of solids and liquids?
Stirring affects how quickly a solute dissolves in a solvent, but has no effect on how much solute will dissolve. The amount of solute that will dissolve is affected by temperature - more will dissolve at higher temperatures. This is called the solubility of the solute
Get Brainiest if correct
The Moon doesn’t actually change ________, but it appears to from Earth because the part lit by the Sun changes as it travels around Earth.
Answer:
Shape?
Explanation:
that's the only thing that would make sense
Answer:
Shape
is the answer
True or False. The speed of light is sped up by dense media.
Answer:
false
Explanation:
According to the laws of reflection, the speed of light is slowed down by denser media, hence the statement is false.
What is reflection?Reflection of light is defined as a property of light ray that when it strikes a smooth surface it bounces back .Objects can be seen due to this property of light.Reflection is produced by all types of waves namely sound waves, light waves, electromagnetic waves.
Reflection of light is governed by laws of reflection which are also called as Snell's laws. According to laws of reflection, angle of incidence and angle of reflection are equal.The incident ray , reflected ray and normal all lie on the same side of the plane.Light travels in a straight line before, after and during the process of reflection.There are 3 types of reflection which are diffuse reflection,specular reflection and glossy reflection.
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COMPREHENSION QUESTIONS
QUESTION 11: The more
move it. *
something has, the more
it takes to 1 point
force, mass
kinetic energy, force
mass, force
O mass, potential energy
which pair of elements would form an ionic bond?
A. Carbon (C) and oxygen (o)
B. Strontium (Sr) and chlorine (Cl)
C. Cesium (Cs) and geranium (Ge)
D. Magnesium (Mg) and aluminum (Al)
Which statement correctly describes both gasses and liquids?
Answer:
B i hope this helped!
Explanation:
A substance that conducts electricity, is malleable, ductile, and has luster would be classified as a
A) compound.
B) element.
C) metal.
D) nonmetal.
Natural process in which certain gases in the atmosphere keep heat near earth and prevent it from radiating into to space
The greenhouse effect is a process in which gases in the atmosphere keep heat near earth and prevent it from radiating into space.
What is the greenhouse effect?Greenhouse effect can be described as the process by which radiations from the sun are absorbed by greenhouse gases and do not travel back into space. This prevents the surface of the earth from freezing.
The sun heats up the earth’s atmosphere during the day and the earth cools down at night by radiating heat back into the atmosphere. The heat is absorbed by the greenhouse gases and makes the surface of the earth warmer, which makes the survival of living beings on earth possible.
But because of the increased levels of greenhouse gases, the temperature of the earth has considerably increased. The major contributors to greenhouse gases are automobiles, deforestation, factories, etc. which increases the amount of these gases in the atmosphere.
The greenhouse gases do not allow radiation or heat to escape from the earth and increasing the surface temperature of the earth and leading to global warming.
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Is neon magnetic ? Also what id its freezing point?
Answer:
diamagnetic -415.5 degrees F so yea on the magnetic part
Explanation:
what does it mean to have a fair test?
Answer:
to make sure that you change one factor at a time while keeping all other conditions the same.
Explanation:
Answer:
A test with the same control variable
Explanation:
Say you're testing mentos and coke, you have to use the same type of mentos and coke to keep it fair. the only thing you change is the independent variable which would be the number of mentos in this case.
What is the density of a metal with a mass of 20 g and a volume of 4 cm^3
Answer:
5 g/cm^3
Explanation:
density = mass/volume
20/4 = 5
Mary discovered that the cell membrane of a bacteria acts like a fence because it keeps some things in and other things out.
A. Observation
B. Analogy
C. Inference
Mary walked into her room where her little son was playing, found a broken window, and thought immediately that her son had broken it.
A. Observation
B. Analogy
C. Inference
Mary noticed that her counter top was warm to the touch.
A. Observation
B. Analogy
C. Inference
Mary noticed that the side walk was wet and thought that it may have been that the sprinklers had been on recently.
A. Observation
B. Analogy
C. Inference
Mary counted and recorded 20 heart beats in 10 seconds.
A. Observation
B. Analogy
C. Inference
The lecturer compared the human eye to a camera lens.
A. Observation
B. Analogy
C. Inference
Answer:
1. B
2. C
3. A
4. C
5. A
6. B
Explanation:
An analogy can be defined as a cognitive process which typically involves comparing things having similar characteristics or features for the purpose of explanation or clarification. An observation can be defined as a process which typically involves carefully monitoring something for the purpose of understanding and clarity. An inference can be defined as a cognitive process which involves reaching a conclusion or forming an opinion based on sets of evidence or reasoning.1. Mary discovered that the cell membrane of a bacteria acts like a fence because it keeps some things in and other things out: this is an analogy because there's a comparison between the cell of a bacteria and a fence.
2. Mary walked into her room where her little son was playing, found a broken window, and thought immediately that her son had broken it: this is an inference because she immediately thought her son broke it.
3. Mary noticed that her counter top was warm to the touch: this is an observation which was based on an evidence of touch.
4. Mary noticed that the side walk was wet and thought that it may have been that the sprinklers had been on recently: this is an inference because it was based on her thoughts.
5. Mary counted and recorded 20 heart beats in 10 seconds: this is an observation because she actually counted her heart beats.
6. The lecturer compared the human eye to a camera lens: this is an analogy because it was a comparison between a human eye and a camera lens.
Which of the following is an example of the Law of Conservation of Mass?
Answer:
C.
Explanation:
The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases, equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.
Answer:
C, since matter cannot be created or destroyed the same number of particles must be present on both sides of the equation. Hence why all chemical reactions must be balanced.
Explanation:
Based on the kinetic molecular theory (KMT), which statement is true?
The particles of matter are do not move.
Matter is composed of very small particles.
The particles of matter have zero kinetic energy.
Matter is made up of only charged particles.
Statement 1 is false because heat is the movement of molecules.
Statement 2 is true because matter is composed of elementary particles which are VERY small.
Statement 3 is false because the kinetic energy of a particle determines its heat and it is impossible for a particle to be completely motionless.
Statement 4 is false because neutrons do not have a charge and make up a large portion of all matter.
Sara takes a 40-minute bus ride from her home to her grandparents’ home, which is 8 km away. What is the average speed of the bus.
12 Km / hour
Explanation:
using the formula
average speed = ( where time is in hours )
40 min = = hour
speed = 8 ÷ = 8 × = 12 Km / hour
Answer:
12 Km / hour
Why do space objects fall to earth
Answer:
gravity
Explanation:
hope this belps
The space objects fall to earth because of the gravitational force of the earth. Earth pulls all objects towards itself by gravity.
What is gravity?Every object and person in their respective locations can be attributed to the force of gravity. It lends an object weight. Everyone will be floating in the air if there is no gravity.
Differing locations experience different levels of gravity. Similar to the earth, there is a strong gravitational pull. There is the less gravitational pull on the moon. In mars, there is less gravitation force than on earth.
The gravitational force pulls all objects towards itself, that is why if an object from space falls, it falls towards the earth. The gravitational force is very high on Earth.
Thus, due to gravity on earth, all space objects fall to earth.
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Which characteristic influences the polarity of these molecules?
(Molecules are; CCI4, NH3, CH4, H20, CO2)
Answer:
The larger the difference in electronegativity, the larger the dipole moment.
Explanation:
Please help I’ll mark brainleist
Answer:
SAme. What's le question, I will answer correctly.
Explanation:
We use the Scientific method to minimize human error in experiments.
OS
OO
True
False
Answer:
false false false false false
Which process is a chemical change?
burning a match
boiling water
melting ice
breaking glass
Answer:
the answer is burning a match
Explanation:
when you break glass, the properties of glass is still the same, melting ice and boiling water are both phyisical changes since they are chnages in state.
woo burning is a type of combustion reaction and when we light a match, matches include different chemicals that help to ignite it with friction so its A, burning a match
Answer:
A. burning a match on edge 2021
i need some help only answer if you are 100% sure
Answer:
poles
Explanation:
Green light has a frequency of 6.01 x 1024 Hz. What is the wavelength?
Answer:
λ= 4.99 * 10^-17
Explanation:
C= F * λ
F= frequency(Hz)
λ= wavelength(m)
C= 3.0 * 10^8
F= 6.01 * 10^24
λ= ?
3.0 * 10^8= (6.01 * 10^24) λ
***Simplify
λ= 4.99 * 10^-17
3+[5(2-3)-6
EVALUATE THE EXPRESSION
HELP PLEASE
Answer:
-8
Explanation:
Cube has a mass of 15g and the volume is 30cm what’s its density