The average speed : 3.07 m/s
Further explanationGiven
d1 = 2 km
t1 = 9 min
d2 = 1.5 km
t2 = 10 min
Required
The average speed
Solution
Average speed = total distance : total time
total distance :
= d1+d2
= 2+1.5
=3.5 km
total time :
= t1+t2
= 9 min + 10 min
= 19 min
Average speed :
= 3.5 km : 19 min
= 0.184 km/min
= 3.07 m/s
skateboarder left at 3:40 pm. The skateboarder arrived at 4:55 pm. How much time did
it take for him to get there?
how does weathering affect earths surface
as it breaks down the surface , it reshapes it
A 100.-gram sample of H2O(l) at 22.0°C absorbs 830. joules of heat. What will be the final temperature of the water? Hurry pleaseeee!!!
Answer:
That is extremely confusing. Try contacting your prof.
Explanation:
forces tending to pull two objects together?
Answer:
Explanation:
Gravity and oppositely charged particles will both experience attractive forces
I need help on this please
thanks
Answer:
D. The flesh should return to normal after you press it.
Explanation:
The water content stored in the flesh of the fish, paired with the elasticity are both indicators of freshness, and will cause the flesh to return to normal after its been pressed.
3. What agency tracks the activities of typhoon that enters PAR?
A. Department of Education (DepEd)
B. Department of Social Welfare and Development (DSWD)
C. Department of Environment and Natural Resources (DENR)
D. Philippine Atmospheric, Geophysical and Astronomical Services
Administration (PAGASA)
4. Typhoon Grasya is 186 km away from Bislig City, and its landfall isexpected in 3.00 hr. What is the speed of the typhoon?
A. 60.0 kph
B. 61.5 kph
C. 62.0 kph
D. 63.5 kph
Answer:
3.
D. Philippine Atmospheric, Geophysical and Astronomical Services
Administration (PAGASA)
Explanation:
4.C. 62.0 kph
3) The agency that tracks the activities of typhoon that enters PAR is; D. Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA)
4) The speed of the typhoon is; C: 62 kph
3) PAR simply means Phillipines Area of responsibility.
Now this PAR is an area located at the Northwestern Pacific and it is the place where the Philippines' national meteorological agency called Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) usually monitors the weather occurrences.
This means that the typhoons that enter PAR would also be monitored by PAGASA.
4) we are given;
Distance of Typhoon Grasya from Bislig city; d = 186 km
Time at which landfall is expected; t = 3 hours.
Formula for speed is;
Speed = distance/time
Speed = 186/3
Speed = 62 kph
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Help pls thnk you!!!!!!!!!!!!!!!!!!!. First to answer will get Brainliest!!! The answer have to be right tho!!!
Answer:
b i think im sorry if im wrong
Explanation:
This mineral can be scratched with a fingernail.
Fluorite
0 Gypsum
Quartz
Pretty sure it’s gypsum.
How many moles of oxygen are needed to react with 100.0 grams of aluminum?
Answer:
2
Explanation:
According to the concept of valency, 2 moles of oxygen are needed to react with 100.0 grams of aluminum.
What is a mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.
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will mark u the brainliest. You have 1.5 moles each of hydrogen gas (H2) and sulfur hexafluoride gas (SF6). At STP, these gases will both occupy the exact same volume (33.6L). Will the gases have the same mass? Why or why not?
Answer:
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Explanation:
For any chemical process in an isolated system in which all reactants are converted to products, the original mass of reactants must be the final mass of products. is greater than or less than or equal to
Answer:
equal to
Explanation:
This question is depicting the LAW OF CONSERVATION OF MASS/MATTER, which states that matter can neither be created nor destroyed. Hence, in an isolated system, the original mass of the reactants must be EQUAL TO the final mass of the products formed.
In other words, the law states that no matter the change in chemical composition of the reactants in a chemical process, the mass does not change or it remains constant.
Write 3 complete sentences about ionic bonding.
What happens to an egg that is not fertilized?
It is reabsorbed by the body.
It travels back up the fallopian tube.
It exits during childbirth.
It is released during menstruation.
Answer:
It's D.
Explanation:
When the egg is not fertilized, the thick uterus lining breaks down and the blood, tissues, and the unfertilized egg come out of the vagina commonly known as menstruation. When the egg is not fertilized the menstrual cycle takes place as the egg is shredded off from the body.
What kinds of global disaster alerts and communication infrastructure can help mitigate the effects of natural disasters
Explanation:
Prior preparation is required in a location at risk of natural disasters, this includes a communication system and infrastructure aimed at protecting and educating society. Technology is extremely important for the prevention of natural disasters, through forecasting and monitoring systems it is possible to map and analyze the possible risks and anticipate them with the necessary solutions, such as removing a population from a certain location with a risk of drilling.
It is necessary for the population to be aware, understand the alerts and signals issued in case of risk and follow the guidelines of the trained authorities, in this way it is possible to mitigate the effects of natural disasters.
When vinegar is added to some marble chips ( calcium carbonate) bubbles of gas are observed, what gas is produced and how can it be identified?
Answer:
By passing the gas through lime water
Explanation:
The equation of the reaction of vinegar with calcium carbonate in the form of marble chips is shown below;
CaCO3(s) + 2CH3COOH(aq) ---------> Ca(CH3COO)2(aq) + H2O(l) + CO2(g).
We can see from the reaction equation that the gas produced is carbon dioxide. This gas is identified by passing the gas through lime water. If lime water turns milky, then the gas is truly carbon dioxide.
3. Ni(NO2)3
What’s the name for the formula
non examples of chemical formulas
Answer:
1+2 = 12
Explanation:
this is a math equation, not a chemical formula
How does an increase in temperature affect the equilibrium concentration of the underlined substance and K for each of the following reactions?
(c) SO2(g) S(s) + O2(g) DH° = 297 kJ
Explanation:
Due to the positive value of the change in temperature, this is an endothermic reaction.
Since the forward reaction is endothermic, increasing the temperature increases the equilibrium constant (k).
In an equilibrium system, the position of the equilibrium will move in a way to annul the change made to the system. An increase in temperature for an endothermic reaction would favour the reaction, leading to increase in amount of products and decrease in amount of reactants.
In a submarine beneath the ocean’s surface, a captain peered into a long tube to see possible threats in the sea and air above. This sight tube, called a periscope, was designed by the Frenchman Marie Davey in 1854. Davey’s periscope contained two mirrors, one placed at each end of a vertical tube. The mirrors were set parallel to each other and at 45 degrees to the vertical. The reflective surfaces faced each other. When light from an object on the surface reflected downward, an image appeared to the eye. People in submerged submarines could see what was above them!
Imagine you are in a submerged submarine looking through a periscope. What are some things you might see?
differences between bright half and
Answer:
Explanation:
Bright half starts from a new moon day and ends on a full moon day
dark half starts from a full moon day and ends on a new moon day
Answer and Explanation:
The bright half is the side we see and the dark half is the other side.
If you're referring to the moon, the bright half starts on a new moon day and ends on a full moon, whereas on the other hand dark half starts ona full moon and ends in a new moon, kinda like cycle. There are practically the same and have no big astounding differences between them.
The formula for a different carbonate compound is KCO3.
Give the names of the three elements which make up this compound.
Answer:
ω∉1
Explanation:
give the systematic name for each compound. Spelling counts.
a)CIF(subscript 3)
b)CI(subscript 2)O(subscript 7)
Answer:
a) Chlorine Trifluoride
b) Dichlorine Heptoxide
GOOD LUCK FOR FUTURE! :)
an object is moving to the right at a constant veloxity. what will happen if a force of 20 N starts acting on it in the opposite direction
Answer:
Explanation:
The objects velocity will decrease because the force is opposing its motion
MULTIPLE CHOICE QUESTION
Which distance-time graph most
accurately represents the data in the
data table?
Answer:
(a) The slope of distance-time graph gives the speed of the objects.
As the slope of object (B) is the greatest among all, thus B has the largest speed and hence it is the fastest among all the objects.
(b) : As the curve of the objects do not intersect with each other even once, hence they cannot be at the same point on the road at the same time.
(c) : On the y axis (i.e. distance line), 7 small represents 4 km
∴ 1 small line =
7
4
=0.57 km
Position of C at the instant B passes A is 8 km
(d) ; Position of B at the instant it passes C is 2nd small line above 4 km i.e. 4+2×0.57=5.14 km
∴ Distance traveled by B =5.14−0=5.14 kmV
Explanation:
What would be the theoretical yield in grams of carbon dioxide in the reaction shown below if 30 g of C6H12O6 were reacted with an excess of oxygen? C6H12O6 + O2 -> CO2 + H2O
Answer: Thus 44 g of [tex]CO_2[/tex] will be produced if 30 g of [tex]C_6H_{12}O_6[/tex] were reacted with an excess of oxygen
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} C_6H_{12}O_6 =\frac{30g}{180g/mol}=0.17moles[/tex]
The balanced chemical equation is:
[tex]C_6H_{12}O_6 +6O_2(g)\rightarrow 6CO_2+6H_2O(g)[/tex]
As [tex]C_6H_{12}O_6[/tex] is the limiting reagent as it limits the formation of product and [tex]O_2[/tex] is the excess reagent.
According to stoichiometry :
1 mole of [tex]C_6H_{12}O_6[/tex] produce = 6 moles of [tex]CO_2[/tex]
Thus 0.17 moles of [tex]C_6H_{12}O_6[/tex] will produce=[tex]\frac{6}{1}\times 0.17=1.0mole[/tex] of [tex]CO_2[/tex]
Mass of [tex]CO_2=moles\times {\text {Molar mass}}=1.0moles\times 44g/mol=44g[/tex]
Thus 44 g of [tex]CO_2[/tex] will be produced if 30 g of [tex]C_6H_{12}O_6[/tex] were reacted with an excess of oxygen.
What is the boiling point of a solution of 1.20g of glycerol, C3H8O3, in 20.0 g of water?
What is the freezing point?
TB solution = 100.3315 °C
T freezing solution = -1.209 °C
Further explanationGiven
1.2 g glycerol
20 g water
Required
the boiling point
the freezing point
Solution
ΔTB = KB . m
ΔTF = KF . m
mass water = 20 g = 0.02 kg
Kb water = 0.51 °C/m
KF water = 1.86 °C/m
mol glycerol :
= 1.2 g : 92,09382 g/mol
= 0.013
molal : the number of moles of solute in 1 kg of solvent
molal of solution :
= 0.013 : 0.02
= 0.65 m
ΔTB = KB . m
ΔTB = TB solution - TB solvent
TB solution - 100 = 0.51 x 0.65
TB solution - 100 = 0.3315
TB solution = 100.3315 °C
ΔTF = KF . m
ΔT = KF . m
ΔTF = 1.86 x 0.65
ΔTF = 1.209
T_f = -1.209 °C
How does pouring water extinguish fire?
A student dissolved a small amount of baking soda in water and tested it with paper. The litmus paper turned blue. Is baking soda likely an acid or a base?
Answer:
The correct answer is - alkali or base.
Explanation:
The litmus paper test is used to find whether a solution is basic or acidic. In a litmus paper test, a litmus paper is a dip in a particular or desired solution that turns the color of litmus paper to red, blue, or purple based on the pH of the solution.
If the paper turns red it means the solution is acidic, in a neutral solution it turns to the purple color and if the blue color appears then it is a basic or alkali solution. The solution of baking soda turns litmus paper into blue color which means baking soda is most likely a base.
The element with the atomic mass of 12 amu, and 6 nuetrons: (E2) A (B3) (D4) O (14)
Answer:like my photo bc i like it
Explanation:
omg i look .........................................
Color by number: Classifying Reactions
Hello! Can someone help me figure out what type of chemical reactions these equations are? Only the ones without the pencil next to them :)
Answer:
not chemical only that's classifying reactions
and figures equations
Explanation:
that may answer
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The reaction of the different metals together to form a new compound is called a chemical reaction.
According to the question, we have to color the region which shows the behavior of the reaction.
Reaction first is a combustion reaction.Reaction second is the combination reaction.
Reaction third is double displacement reaction.
Reaction fourth is a decomposition reaction.Reaction fifth is a double displacement reaction.
Reaction sixth is a combination reaction.
Reaction seventh is a double displacement reaction
Reaction eight is a double displacement reaction
Reaction ninth is a combustion reaction.Reaction tenth is a decomposition reaction.
Hence, these are the answer to the question.
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