Answer: I think it's A
Explanation:
Why is it important to plants and animals that photosynthesis occurs?
What is the main problem with renewable energy
sources?
Answer:
biggest problem with mainstream renewable energy is intermittency.
Answer:
the biggest problem with mainstream renewable energy is intermittency.
Wind power is only generated when it's windy.
Solar power is only generated when it's sunny.
This creates several fundamental issues.
I NEED HELP :)
A train travels 76 miles in 1 7/12 hours. What is its average speed in miles per hour?
Answer:
48 mph
Explanation:
total time= 19/12 hr
distence- 76 miles
speed- D/T=76/19/12
which is 48mph
if my answer helps please mark as brainliest.
Answer:
pretty sure its average speed in miles per hour is 48
Explanation:
I just took 76 and divided it by 1 7/12 and got 48
When are atoms considered to be stable?
Answer:
Atoms are at their most stable when their outermost energy level is either empty of electrons or filled with electrons.
WILL VOTE BEST & GIVE 20 POINTS
When completing your laboratory experiment, you placed 25.00 g of copper in the
graduated cylinder. Then you noticed the water level mark was filled to 50.0 ml. The total
mass of all the components is 58.80g. Know that the density of water is 1.0 g/ml, calculate
the density of this iron sample. Show all work.
Answer:
58.80/50= 2.352
Explanation:
kk
What is the balanced equation of Na2S+CuSO4=CuS+Na2SO4?
brainiest plsss helpp
Answer:
[tex]\boxed {\boxed {\sf A. \ 19,320 \ kg/m^3}}[/tex]
Explanation:
We want to find the density. The formula is mass over volume.
[tex]\rho = \frac{m}{v}[/tex]
The mass is 500 kilograms. The volume is 0.026 cubic meters.
[tex]m= 500 \ kg \\v=0.026 \ m^3[/tex]
Substitute the values into the formula.
[tex]\rho= \frac{ 500 \ kg}{ 0.026 \ m^3}[/tex]
Divide.
[tex]\rho = 19230.7692 \ kg/m^3[/tex]
This is just about equal to 19,320 kg/m³, so choice A is correct.
Answer:
A) 19230 kg/ m3
Explanation:
divided it's mass by its volume ti get it's density
500/0.026 = 19230
To find the volume of a ring, the water displacement method was used.
What is the volume of the ring with correct significant figures?
Answer:
4 cm³?
Explanation:
68-64
10
10
40
32
O
O
20
10
10
O
20
20
305
2 read the thermometer and fill in the temperature in Celsius and feharient
Answer:
10-10 above the 0 is positive and the ones below is - (negitive)
Explanation:
advantages of artificial fertilizers?
Answer:
they improve soil texture
Explanation:
that's it helps to hold
water longer and and increase the soil bacteria and fungal activity in the soil so they do not only assist your plants , they help the soil.
A microwave oven uses electromagnetic radiation to heat water molecules in food or drink. This radiation has a frequency of 2.45 x 10⁹ Hz. Calculate its energy
Answer:
1.62 × 10⁻²⁴ J
Explanation:
Step 1: Given and required data
Frequency of this radiation (ν): 2.45 × 10⁹ Hz (2.45 × 10⁹ s⁻¹)Planck's constant (h): 6.63 × 10⁻³⁴ J.sStep 2: Calculate the energy (E) of this electromagnetic radiation
We will use the Planck-Einstein's relation.
E = h × ν
E = 6.63 × 10⁻³⁴ J.s × 2.45 × 10⁹ s⁻¹ = 1.62 × 10⁻²⁴ J
A piece of substance Z is heated directly and it is found that 5805 Joules of energy are needed to raise the temperature of the substance from 25.0C to 35.0C. The specific heat of substance Z is known to be 1.28 J/gc. What was the mass in grams of this piece of substance Z?
Answer:
10.0 should be your answer
Explanation:
I have had this before unless of course they changed it
How do most cells in your body sense their surroundings?
O they touch things
O they see things
they smell things
they hear things
O all these answers are correct
(this is due tonight)
Give a real life example of something that is measured in velocity units.
Answer:
Velocity of a satellite around the earth.
Velocity of a car while driving.
Explanation:
plz help me i swear will mark you brainiest
Answer:
C is the correct answer 35% and 9%
If you produced 50.0 moles of carbon dioxide from the complete combustion of ethanol in air, how many moles of water vapor are also produced?
hojbiuhok.
Explanation:
.;..........hv
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:
On the periodic table, all of the cards in each row (across) have the same what?
two students performed an investigation
Answer:
what was the investigation ???
why do reactions go faster at a higher temperature?
Answer:
1. Increasing the temperature increases the average speed of the reactant molecules
2. faster moving molecules in the warm reactants hit each other with more energy
Explanation:
Answer:
Explanation: At higher temperatures the particles can collide more often and with more energy. It makes the reaction take place more quickly.
What is a chemical symbol? Give an example.
Answer:
zero two is bae
Explanation:
Compare and contrast the molecular activity of solids, liquids, and gases.
Answer:
The molecules in a solid are close together and they vibrate in place. The molecules in a liquid move quickly and farther apart from eachother. The particles in a gas move freely at high speeds and slide past eachother.
Explain in your own words. What does DNA mean?
Answer:
DNA aka deoxyribonucleic acid is a molecule in cells that holds genetic information. Their main job is to tell the cell what type of protein to make. The other instructions they hold for the organism is instructions on how to develop, survive and reproduce.
Explanation:
DNA is the genetic material made of two polynucleotide chains that coil around one another to create a double helix is called deoxyribonucleic acid (DNA).
All known organisms and many viruses have genetic information in the polymer that is necessary for their development, operation, growth, and reproduction. Nucleic acids include ribonucleic acid and DNA.
DNA is the genetic material found inside bodily cells that contribute to an individual's unique genetic makeup. Similar to the game's code or a home's blueprints, it contains the directions for creating the body.
Learn more about DNA, here:
https://brainly.com/question/30006059
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An example of an abiotic factor that would strongly affect the population of water lilies in a pond?
Answer:
temperature, light or pH
Explanation:
I Need Help with this plz
Answer:
a
Explanation:
Question 3 of 10
What is thermodynamics?
O A. The study of the transfer of hot and cold energy
B. The study of the movement of energy and heat
C. The study of kinetic energy and potential energy
D. The study of the conservation of matter and energy
Answer:
B
Explanation:
the branch of physical science that deals with the relations between heat and other forms of energy (such as mechanical, electrical, or chemical energy), and, by extension, of the relationships between all forms of energy.
Answer:
B
Explanation:
Hurry please!! Need fast.
What type of chemical reactions is shown. Any number after the elements symbol represents the subscript.
Fe2(CO3)3 - Fe2O3 + 3CO2
Synthesis
Single Replacement
Decomposition
Combustion
Double Replacement
C12 + K3N -> N2 + KCI
Single replacement
Synthesis
Combustion
Double Replacement
Decomposition
CH4 + O2 -> CO2 + H2O
Double Replacement
Single replacement
Synthesis
Decomposition
Combustion
Na3N + AI(BrO3)3 -> AIN +Na(BrO3)
Double Replacement
Single replacement
Synthesis
Combustion
Decomposition
Activity 7 Let's Think First
Directions: Below are possible situations during an earthquake. Encircle the letter of the appropriate action.
1. If you are outside of your house, move away from the buildings.
A. I will do it
B. I will just run anywhere.
2. If you are inside your house, get cover under a table.
A. I will do it
B. I will not do it
3. If you are in a moving car, what will you say to the driver?
A. Just keep driving.
B. Please stop.
4. Drop to the ground and protect your head.
A. I will do it
B. I will not think about it.
5. Prepare a disaster emergency kit beforehand.
A. I will do it
B. I will not do it.
An atom forms an ion with a -2 charge. It is:
A:A metal in group 2
B:A metal in group 6
C:A non-metal in group 2
D:A non-metal in group 6
How are the cells produced through mitosis and meiosis different?
Answer:
In mitosis 2 identical cells are created, but in meiosis 4 sex cells are created.
Explanation:
In mitosis there are 5 stages. These stages are prophase, prometaphase, metaphase, anaphases, and telophase. In meiosis there are also 5 stages, they are the same phases, they just end with II. (Ex. Prophases II)