Answer:
A body is said to be at rest of it does not change its position with respect to a fixed point taken as a reference point in its surroundings, with the passage of time.
A body is said to be in motion if it's changes its position continuously with respect to a fixed point, taken as a reference point in its surroundings, with the passage of time.
Each of the following can be used to make observations, except: *
A calculator
A digital scale
Your sense of smell
A microscope
Answer:
Calculator
Explanation:
A calculator is used to make, well calculations
You can use a scale to get information about the weight of an object, and you can observe how weight changes in relation to size etc.
For obvious reasons, you can observe different scents
Again a microscope is an observational tool
Jerod used a golf club to hit a ball what was the action and reaction
Answer: I'm pretty sure the action is Jerod swinging the golf club and the reaction is hitting the ball
Explanation:
A substance has a density of 3.89 g/mL. Determine the volume, if the mass is 2.58 g.
The density of a substance can be defined as the mass of the subtance per unit volume of the substance. Mathematically, the density of a substance can be expressed as:
[tex]Density = \frac{Mass}{Volume }[/tex]
With the above information in mind, we can obtain the volume of the substance given in the question above as illustrated below:
Density = 3.89 g/mL
Mass = 2.58 g
Volume =?[tex]Density = \frac{Mass}{Volume} \\\\3.89 = \frac{2.58}{Volume }[/tex]
Cross multiply
3.89 × Volume = 2.58
Divide both side by 3.89
[tex]Volume = \frac{2.58}{3.89}\\\\[/tex]
Volume = 0.66 mLTherefore, the volume of the substance is 0.66 mL
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PLEASE HELP
1. What qualities do you think are important for a scientist to have? Give an
example of how one of these qualities is shown in your own approach to your
schoolwork. Answer in two to three paragraphs. (10 points) Think about what a
scientist does in order to obtain reliable information. Do you do any of these
things?
Answer:
I think some important qualities for a scientist to have is to be hard working, clever, and be able to manage your time and projects well. When you’re a scientist, you are going to be in a lab or in the field a lot. You need to be clever to carefully write down things that are important and interesting. You're also going to have to be hard working as well because as a scientist, it is important to work hard and get sound results.
I think one of the qualities that shows in my schoolwork is hard work. I always do my best on my assignments. I constantly work to get ahead and finish my work on time. The harder I work, the less work I have to do. Since I keep myself busy, I make myself less busy.
Explanation:
yep
things required to prepare hand sanitizer to be used at school
what you need:
1 part aloe vera gel or glycerin
2 part isopropyl alcohol (rubbing alcohol) with a concentration of 91%
Essential oil, such as lemon or lavender (this is an optional ingredient for scent)
Clean containers for mixing and an air-tight container for storage
Spoon or whisk for mixing
Explanation:
step:
Combine the aloe vera gel or glycerin with the isopropyl alcohol in a clean container. To get one cup of sanitizer, combine ⅓ cup of gel or glycerin with ⅔ cup of rubbing alcohol.
Mix thoroughly with your spoon or whisk to ensure that the alcohol is evenly distributed throughout the gel.
Stir in five drops of an essential oil, if you're using it. This is entirely optional and is only meant to improve the scent of the sanitizer.
Store the sanitizer in an air-tight container. Alcohol evaporates with time, so an air-tight container will keep your sanitizer effective for longer. A pump or squeeze bottle can minimize evaporation while keeping your sanitizer easily accessible — just make sure the container for your sanitizer is clean and air-tight
A chemist investigates the
I) melting point
II) flammability
III) boiling point
of acetone, a component of fingernail polish
remover. Which is/are physical?
1. II only
2. I and II only
3. II and III only
4. III only
5. I. II and III
6. I and III only
7. I only
8. None of these
Answer:
1, 2 & 3
Explanation:
. A chemist investigates the boiling point, melting point, and flammability
of a compound called acetone, a component of nail polish remover.
Which of these properties are physical properties and which are
chemical properties?
Physical ( boiling point and melting point ).
Chemical ( flammability )
Among the properties listed (melting point, flammability, and boiling point), only the flammability of acetone is a chemical property. The other properties (melting point and boiling point) are physical properties since they are associated with changes in state .
The correct option is 1 .
The melting point of a substance is the temperature at which it changes from a solid to a liquid state. This is a physical property because it does not involve a change in the chemical composition of the substance. However, acetone is a liquid at room temperature, and therefore, it does not have a well-defined melting point. It would vaporize (evaporate) instead of melting.
Flammability is a chemical property. It refers to the ability of a substance to undergo combustion when exposed to a flame or ignition source. It involves a chemical reaction, as the substance interacts with oxygen to produce heat and light.
The boiling point of a substance is the temperature at which it changes from a liquid to a gas state. This is a physical property, similar to the melting point, as it does not involve a change in the chemical composition of the substance.
Hence , 1 is the correct option
To learn more about melting point
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CCC Systems and System Models Liquid gallium changes to a gas at 2229°C.
Describe how a model of gaseous gallium would compare to the model of liquid
gallium shown in the picture.
Gaseous gallium will consist of atoms separated from each other by a large distance and do not experience inter-particle attractive forces.
There are three states of matter;
SolidLiquidGasMatter can exist in all these states of matter depending on the extent of inter-particle attractive forces in the substance.
Inter-particle attractive forces are strongest in solids hence they have a definite shape and volume and do not flow.
Liquids have weaker inter-particle attractive forces than solids hence liquid particles can flow. Liquids have a definite volume but not a definite shape.
Gases have almost no inter-particle attractive forces between particles hence gas particles are separated by large distances and move at very high velocities. A gas does not have definite shape or volume.
A model of gaseous gallium will show atoms of gallium separated by large distances and do not experience inter-particle attraction.
A model of gas particles is shown in the image attached to this answer.
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9. A 35.2-mL, 1.66 M KMnO4 solution is mixed with 16.7 mL of 0.892 M KMnO4 solution. Calculate the concentration of the final solution.
Answer:
I think that the answer is 0.79M
Nén một hỗn hợp khí gồm 3,0 mol nitơ và 7,0 mol hiđro trong một bình kín, phản ứng có sẵn chất xúc tác thích hợp và nhiệt độ của bình được giữ không đổi ở 450oC. Sau phản ứng thu được 8 mol một hỗn hợp khí.
(a) Tính hiệu suất phản ứng tổng hợp NH3.
(b) Tính thể tích khí amoniac được tạo thành (ở đktc)
Amplify 1.5 force and motion answers??
Answer:
explain question please
Explanation:
How many parents are needed to produce a baby tiger?
Answer:
Only 2
Explanation:
Sterling silver is a mixture of the metals silver and copper.It is used to make jewellery.sometimes sterling silver causes green staining on skin.Which metal do you think is responsible for this?Explain why.
The composition of 925 Sterling Silver lends itself to the occasional green discoloration because of the presence of copper
Explain why a car engine is called an ʻinternal combustionʼ engine?
Answer:
They are named as such because the fuel is ignited in order to do work inside the engine. ... The same fuel and air mixture is then emitted as exhaust. This can be done using a piston (called a reciprocating engine), or with a turbine.
Expand the number 7.7046 X 10%
Answer:
0.77046
Explanation:
Which of the following is not a magnetic material A cobalt B iron C nickel D plastic E steel
Answer:
D. plastic[tex]\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}[/tex]
A chemist is conducting an experiment on a system. At the beginning of the experiment a chemist wants to determine the temperature of the system the system has a definite volume but no definite shape which of the following is most likely also true for the system?
A.The molecules in the system has less kinetic energy than a solid
B. The molecules in the system have more kinetic energy than solid
C. The molecules are held together by stronger attractive forces than a solid
D. Heat flow into the system eventually cause it to have a definite shape
The statement that is true about the system is; " The molecules in the system have more kinetic energy than solid".
There are three states of matter
SolidLiquidGasThe difference between these states of matter lies in the magnitude of intermolecular interaction between particles as well as the kinetic energy of the particles of the substance.
Solid particles have the strongest intermolecular interaction hence they have the lowest kinetic energy.
The magnitude of intermolecular interaction is weaker in liquids than in solids therefore liquid particles have greater kinetic energy than solid particles.
Lastly, gas particles have the greatest kinetic energy because intermolecular forces between them is almost negligible.
Liquids have volume but no definite shape. The description in the question must refer to a liquid system.
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Answer:
The molecules in the system have more kinetic energy than a solid.
Explanation:
Just did test
Please help it’s worth a lot!! I need the answer ASAP!!
Answer:
Show me the previous question so I can help
After using soap to wash dishes by hand, it is sometimes difficult to keep your hands from remaining slick. Explain why rinsing your hands in lemon juice would make them less slick.
Answer:
Explanation: Rinsing hands in lemon juice would make them less slick because when a acid (soap) and a alkaline (lemon juice) reacts it becomes neutral
2. Name 3 elements that are found in the same period.
3. Identify each of the following
a. Metal:
I
b. Nonmetal:
c. Metalloid:
d. Alkali Metal:
e Halogen:
f Noble Gas:
Which of the following statements best describes why burning
a match would be considered a chemical reaction?
a The match gets consumed by the fire.
b Burning a match forms new substances.
c Burning a match is dangerous.
d Burning a match is not a chemical reaction.
Answer:
I would say B
Explanation:
well the other options are wrong
Burning a match would be considered a chemical change because it forms new substances.
WHAT IS A CHEMICAL CHANGE:
A chemical change is a change that involves the chemical components of the substance involved leading to the formation of new substances. This is opposed to a physical change, which only involves a transformation of state. Examples of chemical changes include rusting, burning a match etc.Burning a match is an example of chemical change because it involves the formation of new substances such as ash, smoke etc from wood (match stick).Learn more: https://brainly.com/question/23693316?referrer=searchResults
Could someone plz help me? :(
Answer:
I think it's B " Constraints are more important than criteria ".
does nail polish remover sink or float
nail polish remover float
Answer:
it will float on water
explanation:
Geekette hypothesized that since it floated on the water, like ice does, it must be less dense. ... According to Ken Johnsen, who lists his expertise in chemistry, the components of nail polish indeed make it less dense than water
Chemical bond meant by.... what?
Answer:
Chemical bonding, any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world.
Answer:
A chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through sharing, as well as exchanging, of electrons -or electrostatic forces.
which one IS an example of a homogenous mixture?
a- Chicken noodle soup (yum)
b- tea
c- r.r ice cream (rocky road)
Answer:
I think option ( b) tea is right answer
Which of the following correctly describes what happens to the kinetic energy of water when it changes from steam to a
liquid?
There is no change in the kinetic energy of the molecules.
The kinetic energy of the molecules increases.
The kinetic energy of the molecules decreases.
The kinetic energy of the molecules increases then decreases.
hi <3
i would say the kinetic energy decreases (so option C), as liquid particles are more closely packed than in a gas
hope this helps <3
which type of molecule contains two atoms bonded together
A) simple molecule
B) crystal
C) polymer
D) complex molecule
simple molecules contain two atom bonded together
Answer: Simple Molecule
Explanation: Ambigous question. What is the scientific definition of "simple molecule?" More by process of elimination than actual difinition, this is a simple molecule. It takes a minum of two atoms to make a molecule (by definition). A crystal is a collection of molecules, a polymer is a chain of molecules, and a complex molecule is, er . ., complex. The only reasonable, and best, answer is "simple molecule."
need help with these questions
Answer:
I don't know the answer sorry
which consists of only one type of atom
a pure substance
a mixture
a compound
an element
Answer:
an element
Explanation:
elements like iron or copper consist of only one type
ILL BRAINLIST!!
What would happen to the number of aphids if the number of ladybirds suddenly increased??
Answer:
decrease
Explanation:
ladybirds eat aphids so more ladybirds = more aphids eaten = less aphids
Which statement is true about a triple beam balance and spring scale?(1 point)
A.Both a triple beam balance and a spring scale are used to measure the mass of an object.
B.Both a triple beam balance and a spring scale are used to measure the mass of an object.
C.A triple beam balance is used to measure the weight of an object, and a spring scale is used to measure the mass of an object.
D.A triple beam balance is used to measure the weight of an object, and a spring scale is used to measure the mass of an object.
Answer:
D. A triple beam balance is used to measure the weight of an object, and a spring scale is used to measure the mass of an object.
Explanation:
:)
Answer: The right answer is C!
Explanation: This is 100% right hope its helps! :-D
