An orange falls off of a display at a store and rolls 5 meters in 2.5 seconds the average speed of the orange will be 2 meters per second.
What is speed?Speed if the rate of change of position of an object in a given time of interval or per unit time of interval and it is the ratio of distance traveled to the time taken and the unit will be meter per second.
The average speed of the orange will be if the orange falls off of a display at a store and rolls 5 meters in 2.5 seconds,
Speed = distance / time
Substituting the value,
speed =5 meters /2.5 seconds
speed = 2 meters per second.
Therefore, the average speed of the orange will be 2 meters per second if, the orange falls off of a display at a store and rolls 5 meters in 2.5 seconds.
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Which of the following is a CORRECT statement?
Chemical change cannot be undone or reversed.
Physical change often cannot be undone or reversed.
In chemical change, you end up with the same substance you started with.
In physical change, particles of 2 or more substances rearrange to form new or different substance.
Answer:
Detail is given below.
Explanation:
1) Chemical change cannot be undone or reversed.
The given statement is correct. Because,
Chemical change:
The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.
These changes are irreversible .
Example:
Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood and this reaction can not be reversed.
2) Physical change often cannot be undone or reversed.
The given statement is incorrect.
Physical Change
The changes that occur only due to change in shape or physical properties but their chemical or internal composition remain unchanged.
These changes were reversible.
Example :
Water converting to Ice
Water converting to gas
3) In chemical change, you end up with the same substance you started with
The given statement is incorrect. Consider the following example.
The reaction of Hydrogen and oxygen:
H₂ (g) + O₂ (g) -------------------------------------> 2H₂O (l)
A totally new compound is formed when oxygen and hydrogen are undergo reaction which is water.
4) In physical change, particles of 2 or more substances rearrange to form new or different substance.
The given statement is incorrect.
When particles rearrange them selves the different substance is not formed. Consider the example of water when it converted into ice or vapors. Only phase is changed but water retain its properties so new substance is not formed.
The letters ROYGBIV represent the colors of visible light. Arrange them in order of:
Increasing energy
What is the picture displayed?
Proton , atom , element, cell
Answer:
I can't see the picture so I can't answer
Oxygen atoms have six outer electrons
Write the symbol for an oxide ion.
Answer:
[tex]O^{2-}[/tex] is the symbol for an oxide ion
Using the Periodic Table predict which elements will have similar chemical properties or reactivity.
Group of answer choices
rubidium, yttrium, and zirconium
nitrogen, sulfur, and bromine
magnesium, strontium, and barium
cadmium. calcium, and carbon
Answer:
magnesium. stronsium. barium. they are have similar group in IIA
Help please and explain so I could see you didn’t guess
Answer:
A
Explanation:
because the acid in your stomach can break down anything that you eat causing you to have to use the restroom
Which scenario is an example of primary succession?
A.
the formation of soil after a volcano
B.
the growth of weeds after a flood
C.
the establishment of a forest in an abandoned crop field
D.
the recovery of grassland after a fire
Answer:
the answer to your question is A
Lime stone is a sedimentary rock that contains calcium this type of rock typically forms in warm shallow marine waters. Which process is involved in distributing calcium before it becomes part of the sedimentary rock?
A) tectonic movement
B) weathering
C) a biological process
D) volcanic activity
Answer:
the answer is B!!!
Explanation:
What happens to particles in a solid when heat is applied? (3 points)
a
They move around more.
b
They get closer together.
c
They reduce in size.
d
They stop moving.
Answer:
They move arond more
Explanation:
round 2 significant figures. 5,239
Answer:
5200
Explanation:
What is the mass of 8.250 moles of Cu2O?
Answer:
How many moles CU2O in 1 grams? The answer is 0.0019838596354237. We assume you are converting between moles CU2O and gram. You can view more details on each measurement unit: molecular weight of CU2O or grams The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles CU2O, or 504.06792 grams. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between moles CU2O and gram. Type in your own numbers in the form to convert the units
According to the law of conversion of mass in a chemical equation
What is Mercury's proximity to the sun
Answer:
46.943 million km
Explanation:
From an average distance of 36 million miles (58 million kilometers), Mercury is 0.4 astronomical units away from the Sun.
Answer:
29.169 million miles
Explanation:
From an average distance of 36 million miles(58 million kilometers,Mercury is 0.4 astronomical units away from the sun.
how many picoliters are in 3.16 mL
Answer:
3.16×10⁹ pL
Explanation:
Given data:
Volume in mL = 3.16
Volume in picoliters = ?
Solution:
Picoliter and milliliters are units of volume. Milliliter is greater unit than picoliter.
1 mL = 10⁹ pL
Now we will convert the 3.16 mL into pL.
3.16 mL × 10⁹ pL/ 1 mL
3.16×10⁹ pL
how do you write out 4,5-dimethyl-4-octene
you can see the answer at the pic
What are the reactants of photosynthesis?
Answer:
The photosynthesis chemical equation states that the reactants (carbon dioxide, water and sunlight), yield two products, glucose and oxygen gas. The single chemical equation represents the overall process of photosynthesis.
Explanation:
Please help me thank you! Stay safe
Answer:
number 3
Explanation:
Explanation:
it's the third graph
values are put directly without scaling
How do you calculate mass and velocity does that equal to a certain amount of more energy or no
Answer:
The formula is: p=mv
(P)momentum is equal to (m) mass times (v) velocity.
Explanation:
Why is the nitrogen cycle considered a closed system?
Answer:
because nitrogen is fixed by bacteria and assimilated by plants
Explanation:
Answer:
It is a considered a closed system because nitrogen is fixed by bacteria and is taken in by plants.
Explanation:
Which tissues and organs belong to the Musculoskeletal System?
А. B
Which of the following is true about the picture above? What would it be?
Answer:
Container A is a solution and Container B is a colloid.
Explanation:
Container A is a solution as the tyndall efffect is not present. You cannot see the light bean through the glass.
Container B is a suspension or a colloid as you can see the beam through the glass.
The first option proposes Container A is a colloid...this is not correct
The third option is not true as the tyndall effect is only displayed in container B
The fourth option is not correct the tyndall effect is not present in container A meaning it would not be a suspension or a colloid and you can see the tyndall effect in container B indicating its not a solution
How do I do this problem???
Answer:
i believe it's c
Explanation:
my reason is that if you look at the electrons 2 is the most comm
Question 9 (2 points)
What is the only part of the scientific method that can be proven wrong?
A/
Answer:
hypothesis
Explanation:
hypothesis is only a guess at what will happen. So it is possible that it could be wrong.
Water molecules are polar because the
water molecule has a linear shape.
water molecule has a bent shape.
oxygen atom has fewer electrons around it.
hydrogen atom forms an ionic bond with oxygen.
Answer: B (water molecule has a bent shape)
Explanation:
Water molecules are polar molecules because of their shape. Water molecules have one side that is positively charged due to hydrogen atom which is partially positive and the other side which is negatively charged, due to the oxygen atom.
When two molecules get close to each other the polar forces of attraction brings them close to each other. Oxygen bonds with several hydrogen atoms in the other water molecules resulting to hydrogen bonds.
Answer:
the answer is B
Explanation:
When coal is burned, sulfur is released into the air, where it reacts with oxygen to produce sulfur dioxide and sulfur trioxide. Which of the following is true of this process?
A. The identity of each reactant remains the same.
B.Sulfur dioxide and sulfur trioxide are the reactants in this change.
C.The products have different chemical properties than those of the reactants.
D. The products contain more sulfur atoms and fewer oxygen atoms than the reactants.
Answer:
c
Explanation
they have different properties now
A student drops a 95g object into a graduated cylindor that has 30ml of water in it. After the object is added to the cylinder the water level reads 63ml. What is the density of the object?
Answer:
The answer is 2.88 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass = 95g
volume = final volume of water - initial volume of water
volume = 63 - 30 = 33 mL
We have
[tex]density = \frac{95}{33} \\ = 2.87878787...[/tex]
We have the final answer as
2.88 g/mLHope this helps you
Which group on the periodic table ways to lose electrons?
Answer:
Elements that are metals tend to lose electrons and become positively charged ions called cations. Elements that are nonmetals tend to gain electrons and become negatively charged ions called anions. Metals that are located in column 1A of the periodic table form ions by losing one electron.
Explanation:
hope it helps!
The compound, BeCl2, would be formed by
a. The sharing of all electrons
b. The transfer of all electrons
c.
The transfer of valence electrons
d. The sharing of valence electrons
Answer:
The sharing of valence electrons
Explanation:
A covalent bond is formed when two or more atoms share valence electrons.
In BeCl2, electrons are shared between the beryllium atom and two chlorine atoms.
Owing to the large difference in electronegativity between the two elements, the bond is polar covalent.
What is wrong with the answer, 10.5 x 10^3? Think about the proper form used to show a number in scientific notation.
Answer:
1.05 × 10^4.
Explanation:
The proper scientific notation will be
1.05 × 10^4.
How do you think chemical change is defined?
Answer:
A chemical change happens when one chemical substance is transformed into one or more different substances,
Explanation: