Answer:
15000000
Explanation:
30000 x 500=15000000. I believe... lemme know if I was wrong, hope this helps <3.
How many significant figures are present in the following number:
0.0001790497
Answer:
According to significant figures we have leading zeros, trapped zeros and zeros at the beginning. So that number is a leading zeros and its has 7 SGF.
Write a word equation for the chemical reaction.
I’ll brainlist.
Answer:
potassium hydroxide + sulfuric acid → potassium sulfate + water.
Explanation:
Hope it helps.. if yes, plz mark me as brainliest
What is the difference between luminous objects and non luminous objects
Answer:
Objects that can emit light energy by themselves are known as luminous objects. Objects that cannot emit light energy by themselves are known as non-luminous objects.
Explanation:
Explanation:
Luminous objects:- The objects that can emit light energy by themselves are known as luminous objects.
Objects like the sun that give out or emit light of their own are luminous objects.
Other examples of luminous bodies are Electric bulb, torch etc.
Non-luminous objects:- the objects that can not emit light energy by themselves are known as Non- luminous objects.
Objects like the moon that do not give out or emit light of their own are Non- luminous objects.
Moon is an example of a non-luminous object as we can see the moon because it reflects light from the sun.
Other examples of Non luminous bodies are pen, pencil, chair, wood etc.
Luminosity – It is defined as the luminous intensity in a particular direction; or we can say it is the apparent brightness of an image.
The brightness of a star is defined as the total energy radiated in unit time. It is related to the surface area (A) and the effective temperature (TT) ( the temperature of a black body having the same radius as the star and radiating the same amount of energy per unit area in one second ) by a form of Stefan’s law, here is given by
⇒L=AσT4⇒L=AσT4
where
σ is the Stefan’s constant and L is the luminosity.
Note:
The laptop screen, mobile screen you are looking at right now is luminous but the page of your book is a non-luminous object, which is why you need a light on to read it.
I need help with this question
Answer:
ok ok ok okbokvjhkeokkd
why did scientists accepted dalton's atomic theory but not the idea of an atom proposed by the greek philosophers?
Answer:
Because.in theory, it's impossible for philosophers (Greeks) don't have the proper equipment and also they don't have enough facts to back it up
Explanation:
Hope this helps
what amount (in moles) is present in 2.0g of sodium hydroxide,NaOH
Answer: 0.050 moles of NaOH
Explanation: The molar mass of NaOH is 40.0g/mole
2.0g/40.0g/mole = 0.050 moles (2 sig fig)
Round the following number to 3 significant figures:
.003053456
.00310
.003
.00305
0.003053
Answer:
See explanation below for answers
Explanation:
0.00305
0.00310
0.00300
0.00305
0.00305
When there is a decimal point, you must skip the zeros until you reach a number. Once you reach that number, you move 2 more places to the right of that number in order to have 3 significant figures. Hope this helps!
A statement that describes what scientists expect to happen every time under a given set of conditions is call a scientific
Answer:
law
Explanation:
it is called a scientific law
where did they start water conservation in tamil nadu . short answer
Explanation:
The 2019 water crisis in Chennai has made us realize the importance of saving water more than ever. Water, as we all know, is a finite resource without which our planet would be a barren wasteland. Today with our increasing population it would be logical to say that our water consumption has also increased. And with increasing demand and lesser supply, water scarcity arises. Our ancestors who had foreseen the potential dangers of water scarcity had developed methods to conserve water that was suited for the varied terrain of the Tamil-speaking kingdoms.
Traditional Rainwater Conservation methods of Tamil Nadu
Eri
There are no perennial rivers in Tamil Nadu except the Thamirabharani River which flows through Thirunelveli district. And so, several hundred years ago a simple system was devised to utilize the rainwater to the fullest. An Eri or tank system is one of the oldest forms of water conservation systems in India. Many Eris are still in use in Tamil Nadu and play an active role in irrigation. They act as water reservoirs and flood control systems. They prevent soil erosion, recharge groundwater, and prevent wastage of runoff water during heavy rainfall.
Kudimaramathu
Kudimaramathu is one of the old traditional practice of stakeholders participating in the maintenance and management of irrigation systems. During earlier days, citizens of a village used to actively participate in maintaining the water bodies of their village by deepening and widening the lakes and ponds and restoring the water bodies back to their original form. The silt, rich in nutrients, collected in the process would be used by the farmers themselves in their field. A sense of collective ownership ensured the continued survival of the water bodies.
Solid solid soluton example
Explanation:
rice and rice coatssalt and sugarsand and mudwheat flour and corn flourWhich is most useful in classifying stars? (1 point)
A. knowing the movements of a star
B. knowing the size of a star
C. knowing the apparent magnitude of a star
D. knowing the color and brightness of a star
Answer:
B. Knowing the color and brightness of a star
Explanation:
Pls help with these two questions~-~
32.5 g to fluid ounces
• 2. Using the following formula Force (N) = mass (kg) * acceleration (m/s").
What is the force of a ball with a mass of 5kg fallinly to the ground at
10m/s.
Answer
50 N
Explanation
H2O, OH
H2O, HCN
CN, OH
CN–, H2O
Answer:
The choose 2. H2O , HCN
I hope I helped you^_^
Nitrogen is inactive gas, why?
because it doesn't react easily with other elements it requires high heat and other things
Aqueous lead (II) nitrate, Pb(NO3)2 undergoes a double displacement reaction with aqueous sodium chloride, NaCl, in which a precipitate forms. If the precipitate contains lead, write the balanced chemical equation for this reaction. Be sure to include the states of each of the reactants and products
Answer:
[tex]{ \sf{Pb(NO_{3})_{2(aq)} + 2NaCl _{(aq)} → 2NaNO_{3(aq)} + PbCl _{2(s)} }} \\ [/tex]
what is an homeostasis?
Answer:
it's a property of a cell, tissue and organisms that allows to maintain and regulate the stability and constancy to function properly
Bromine gas completely fills the bottle but liquid bromine just covers the bottom of the bottle
Explain why.
Answer:
Bromine is a dark reddish-brown fuming liquid with a pungent odor. Denser than water and soluble in water. Hence sinks in water.
In your conversion from Milli- to Centi- units, would you move the decimal point to the left or the right?
Answer:
one unit to the left
Explanation:
cm are 10 times mm, so to convert you have to divide by ten
Examples
100 mm = 10,0 cm
0.50 mm = 0.05 cm
Density and Years: What do you know?Objectives: determine and compare density of pennies to assess composition. Procedure:1. Read the directions and create a data table accordingly.2. Place 15-20 pennies in order of consecutive dates. Find the mass of each penny and record.3. Find the volume of all 5 pennies by water displacement and record in your data table. Record the volume adding 5 more pennies at a time until you have measured them all (15-20).a. Find the average volume of 1 penny.4. Calculate the density of each penny and graph according to the year.5. If the density of copper is 8.96 g/cm3 what would the mass of a pure copper penny be?6. Draw a conclusion.7. How might this relate to a real world example?
Answer:I dunno
Explanation:it is the best thing I ever said in this app
Please help me with this chemistry
Answer:
platinum is the correct answer
Answer:
it would be made of platinum
Explanation:
Someone plz help me giving brainliest m
Answer:
C
Explanation:
it would be the best action because questions are important when looking at designs/creating them.
What is the equation to determine the volume of a solid cube?
O V = (7/4)*R^2 *h
O V=|| wh
O V = (4/3)*7*R^3
O V = m*d^2
Answer:
volume = l x h x w
this is just like your cylinder question. none of the answers represent the equation. sorry
What are some possible molecules that could have the empirical formula, XY2Z?
Answer: a
Explanation:
i took the test
please answer quick...................
Answer:
3). C
Explanation:
When inter-nuclear distance [ atomic radius ] is smaller, the nuclear attraction has a greater magnitude.
[tex].[/tex]
Why are intensive properties useful for identifying a substance?
can someone answer this
Answer:
[tex]{ \underline{ \sf{solubility}}}[/tex]
pls answer this question
9 qn is bio i think
pls
Answer:
7. A. properties that differ from both iron and oxygen
8. D. cool the rod and heat the cylinder
9. B. sea level to a mountain top
Starches and sugars being broken down during energy production
a
Chemical Change
b
Physical Change
Answer:
A. Chemical ChangeExplanation:
When starches and sugars are being broken down during energy production it represents chemical change.[tex]\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}[/tex]