Answer:
The application of reflection in the use of the microscopes.
Explanation:
Reflection is one of the properties of light. Reflection is a phenomenon whereby light waves hitting a surface is bounced off. Reflection helps us to see light and colors. This behavior of light is harnessed in the design of the microscope.
The light reflected by the microscope helps the researcher to view the specimen in his slide. Also, the mirrors placed in measuring devices reflects light that helps an observer to take an accurate reading.
CuCl2 + NaNO3 -------> Cu(NO3)2 + NaCl
Answer:
what
Explanation:
During an experiment, four different elements were added to water and observed. Element C showed no reaction. The other three elements bubbled, with Element D bubbling with the greatest vigor and Element A bubbling the least. Which list orders the elements from least reactive with water to most reactive with water?
Answer:
In order most reactive to least reactive:
D
B
A
C
Explanation:
The reactivity series is depend on the element that reacts with the oxygen. The metal which replaces the other metal is a more reactive metal.
In the question, there are different metals and we have to find the reactivity series of the unknown metal
The series in decreasing order is as:- D > B > A > C.
In this reaction, the upper element replaces the lower elements because it is highly reactive.
Hence, the correct sequence is D > B > A > C.
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Boyles Law-
Variables that change:
Variables that remain constant:
Charles Law-
Variables that change:
Variables that remain constant:
Answer:
Boyles Law-
Variables that change: volume and pressure
Variables that remain constant: Temperature
Charles Law-
Variables that change: volume and temperature
Variables that remain constant: pressure
Explanation:
How can you increase reaction rate in the forward direction? Chose all that
apply
Answer:
Sorry my task time about to run out : (
Explanation:
name the stages of the water cycle
Answer:
They are evaporation, condensation, precipitation and collection
Help ASAP I will mark brainliest to the correct answer!!!!✨✨✨
Answer:
1180.3 km
Explanation:
Not sure, but I think you would divide it.
3541 km ÷ 3 hrs = 1180.3 km
Hope this helps, thank you !!
What human actions contributed to the nutrient pollution of Lake Okeechobee?
PLZ HELP MEEEEEEEEEEEEEEEE I BEG YOU
Answer:
These trends were attributed to both the increased external loads and to a reduction in the lake sediment's ability to assimilate nutrients from the water column. The main sources of external nutrient inputs are animal waste and fertilizers applied to food and forage crops.
Is painting the walls of a dollhouse red a chemical change or non chemical change?
Please help.
Answer:
it should be chemical
Explanation:
1. Which of the following
equalities is false?
A. 1 kilogram = 100 meters
B. 50 milliliters = 5 centiliters
C. 3 grams = 0.003 milligrams
D. 70 hectometers = 7,000 decimeters
Fill in the blank with the term that best completes each sentence. During the life cycle of a seedless plant, a sporophyte releases . When spores land, they grow into gametophytes. One gametophyte produces sperm cells that fertilize the cells of another gametophyte, forming a . This then grows into a sporophyte.
Answer:
spores
egg
zygote
Explanation:
i think this is right
Answer:
1) spores
2) egg
3) zygote
Explanation:
hope this helps :)
When energy is released by the pack, what happens to the energy of the surroundings (outside the pack)?
a. The energy increases
b. The energy decreases
c. The energy stays the same
Answer:
a
Explanation:
i hope that's correct
The energy of the surroundings (outside the pack) will:
a. The energy increases, when energy is released.
Energy in the surroundings:Energy is delivered to create bonds, which is the reason the enthalpy change for it is positive to break bonds. Energy is expected to break bonds. Particles are a lot more joyful when they are "wedded" and discharge energy since it is simpler and more steady to be seeing someone.
When energy is released, the energy in the surroundings will increase.
Thus, option a is correct.
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How many neutrons are in potassium-50?
Explanation:
e 20 neutrones
Answer:
31 neutrons
Explanation:
Potassium has 19 protons (you can tell by the atomic number)
Potassium-50 is an isotope, meaning that there are a different amount of neutrons than normal.
Protons never change so subtract 50 from 19 to get the number of neutrons.
Thank chu if you answer
Answer: H
Explanation:
help, with both number 6 and 7, be sure of your answer please, first one to aanswer gets brainliest!
Answer:
6. Mutalism
7. Commensalism
Explanation:
6- Both species benefit = (mutualism).
7- Commensalism is an association between two organisms in which one benefits and the other derives neither benefit nor harm.
Answer:
6: C. Parasitism
7: B. Commensalism
Explanation:
6: Here the flea gets its nutrients from the mouse's blood and the flea benifits from the expense of the mouse.
7: Commensalism is a type of relationship between two living organisms in which one organism benefits from the other without harming it
An element with atomic number 18 is a noble gas.Into which family you shall place elements with atomic number 17 and 19 and why?
Answer:
Explanation:
An element with atomic number 18 is a noble gas.
The element with atomic number 19 will have one extra electron so it can donate one electron or shed one electron to attain noble gas configuration .
It tends to shed one electron to become positively charged ion . Hence they are electro-positive elements .
Similarly the element with atomic number 17 will have one short electron so it can gain one electron to attain noble gas configuration .
They tend to gain one electron to become negatively charged ion . Hence they are electro-negative elements . They have high electronegativity .
Plsss help me I don’t know what to write plssss help
Answer:
To summarise, a parent cell divides by mitosis (doubling the DNA then splitting) and then divides again to have 4 daughter cells with all different DNA in and all with only half the amount of DNA as a normal body cell. This stage is meiosis. They make sperams and eggs which fuse together in fertilisation and once fertilised the cell will divide by mitosis to create embryos and further to grow into a fetus.
Number the steps in the correct order to show how ice changes into gas. __ The molecules gain enough kinetic energy to leave their solid form. __ The water becomes liquid and gets hotter. __ Ice is heated and the molecules speed up __ The molecules leave their liquid form and enter the air as a gas. __ Ice molecules vibrate in a fixed place.
Answer: Please find answer in explanation column
Explanation:
Numbering the steps in the correct order to show how ice changes into gas, we have that
1.Ice molecules vibrate in a fixed place.
2. Ice is heated and the molecules speed up
3. The molecules gain enough kinetic energy to leave their solid form.
4.The water becomes liquid and gets hotter.
5. The molecules leave their liquid form and enter the air as a gas.
Ice is the solid form of water which cannot freely move around in this form so it vibrates about its fixed position.When heated,its molecules acquire energy and its vibration speeds up causing it to overcome its binding forces (that makes it vibrate about a fixed position) and becomes mobile as it leaves its solid form to acquire a liquid state. With continuous heating, the liquid gets hotter making the molecules vibrate more rapidly, spread out and move freely at high speeds to form Water vapour - The gaseous state of water.
how many molecules of water are produced when 3.14 grams of ammonium nitrate are decomposed
Answer:
See the last entry
Explanation:
Remark
Ammonium Nitrate decomposes as follows.
NH4NO3 → N2O + 2H2O
If this does not agree with the reaction you have, let me know.
Step One
Find the molecular Mass of Ammonium Nitrate.
N = 1 * 14 = 14
H = 1 * 3 = 3
N = 1 * 14 14
O3 = 3*16 = 48
Molar Mass =69
Note: the masses used are approximate. Every periodic table is different. When you answer this question use the masses on your periodic table. My numbers are just guides.
Step Two
Find the number of mols in Ammonium Nitrate.
Formula
mols = given mass / molar mass
Givens
given mass = 3.14
Molar Mass = 69
mols = 3.14 / 69
mols = 0.0455
Step 3
moles of water.
1 mol of Ammonium Nitrate = 2 mols of water
0.0455 mols of Ammonium Nitrate = x mols of water
x = 2* 0.0455 mols of water.
x = 0.091 mols of water
Step 4
Find the molecules of water.
1 mol of water = 6.02*10^23 molecules of water
0.091 mol water= x
x = 0.091 * 6.02*10^23
x = 5.48 * 10^23
How is temperature related to the physical change of a
substance?
Answer:
Temperature is a measure of the kinetic energy of particles in a substance. As temperature increases, the atoms or molecules in a substance gain energy.
Explanation:
What is known as the downhill movements of masses of rock and soil?
A. Mass wasting
B. weathering
c. giant erosions
Answer:
b
Explanation:
Answer:
Gravity drives all mass wasting.
Explanation:
What the difference between the tundra and the coniferous forest
Answer:
Differences in Plant Life
The taiga has a thick forest of conifers such as pine and spruce, while in the tundra trees are absent completely. This is due in part to the lack of water available in the tundra, but also is a result of permafrost.
Explanation:
define a shadow plz help
Answer:
A shadow is that thing that follows you everywhere when the sun is out. It's creepy!
Explanation: Hope I helped!
Answer:
A shadow is a dark form that you cannot touch, hear, feel, or taste. It's simply formed when an object blocks a source of light.
Need help matching them with correct formula
Answer:
Here you go I hope it helped you! :) good luck!
what is 208.813 reduced to two significant figures?
Answer:
208.81
Explanation:
i think this is the answer hope this helps
Why is oil so incredibly valuable as an energy source? What is exceptional about its energy density?
Answer:
Easy portability,easy convertability, high calorific value for its unit mass.
Explanation:
Oil is so incredibly valuable as an energy source as it has easy portability, easy convertibility, high calorific value for its unit mass.
What is oil?Any chemical compound that is nonpolar, predominantly hydrocarbon-based, hydrophobic, and lipophilic is considered to be an oil. Typically combustible and surface active, oils. Most oils are lipids which become liquid above room temperature and are unsaturated. Classes of chemical substances that may be unconnected in structure, characteristics, and usage are included in the general concept of oil.
They are employed in the production of numerous varieties of paints, plastic bottles, and various other products, as well as for usage as food (such as olive oil), fuel (such as heating oil), lubricant (such as motor oil), and medical uses. Some religious rituals and ceremonies employ specially formulated oils as cleansing elements. Oil is so incredibly valuable as an energy source as it has easy portability, easy convertibility, high calorific value for its unit mass.
Therefore, oil is so incredibly valuable as an energy source as it has easy portability, easy convertibility, high calorific value for its unit mass.
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Help I really help on this
How many atoms are in 100g H2O ?
Answer:11
explain
: cause i think it is
A cold can of soda is taken out of the refrigerator. It slowly warms up until it is at room temperature. Once the soda has warms up, it has more thermal energy than it had in the refrigerator. Where did this additional thermal energy come from?
Answer:
See explanation
Explanation:
We know that the thermal energy of a substance largely depends on the temperature of the body. This implies that the hotter a substance is, the greater its thermal energy and vice versa.
When you bring a cold can of soda out of the refrigerator, the molecules of air at room temperature gradually loose energy to the can and condense around it. This transfers thermal energy from the air particles to the molecules in the cold can of soda and the soda warms up pretty soon!
It was determined that Plan B would likely limit habitat disruption better than Plan A. State officials, however, decided to go with Plan A. Why did the state officials probably choose Plan A?
Answer: The economic demands of Plan B were too high.
Explanation: During the selection of any action plan to maintain biodiversity, several factors must be considered. These factors include the cost of the plan, the estimated effectiveness of the plan at protecting the targeted populations, and how the plan will affect both humans and other populations in the area.
The chart shows that the approximate cost of implementing Plan A was $5 billion. The approximate cost of implementing Plan B was $30 billion. While Plan B might have been more effective at reducing habitat destruction, and thus maintaining biodiversity, state officials likely chose Plan A over Plan B because the economic demands of Plan B were too high.
Answer: The economic demands of Plan B were too high.
Explanation:
just did it
why can the charge of the nucleus never be +8
Answer:
it could destroy the nucleus
Explanation:
due too much power going into it