Answers
Answer:
#3 i think (:
Explanation:
Related Questions
PLS ANSWER CORRECTLY 50 POINTS AND BRAINLIEST!!!
During an investigation, a scientist burned 48 g of magnesium strip. After the reaction, the total mass of the product formed was found to be 80 g. Does the law of conservation of mass hold true in this case? Use complete sentences to justify your answer based on numerical calculations.
Answers
Answer
yes
Explanation:
the law of conservation of mass hold true in this case burning magnesium strip is explained by this equation 2 Mg (s) + O2 (g) -> MgO (s)So the lighter magnesium, after reacting with oxygen in air, forms the heavier magnesium oxide. molar mass of magnesium and magnesium oxide are 24g and 40g respectively. So the same ratio 24:40 (i.e. 3:5) is maintained in the given masses of 48g and 80g, which means mass is conserved in the reacion.
What is the basic level of an ecosystem?
ecosystem
individual organisms
population
community
Answers
Answer:
(B) individual organisms
Brainliest
Which of the following elements have similar chemical properties to SULFUR?
A. Phosphorus and Arsenic
B. Oxygen and Selenium
C. Phosphorus and Chlorine
D. Nitrogen and Chlorine
Answers
Answer:
B:Oxygen and Selenium
Explanation:
They both have six valence electrons.
Which form of energy represents a moving fan blades?!?!?
Answers
Answer:
Mechanical I believe is the answer.
Explanation:
Which is NOT an isotope of carbon?
carbon-14
carbon-13
carbon-12
carbon-6
Answers
Answer:
carbon-14 or carbon-6, sorry i'm not sure which one.
Explanation:
For example, carbon-12 has 6 protons and 6 neutrons and carbon-13 has 6 protons and 7 neutrons and both are stable isotopes, where as carbon-14 (a radioactive isotope) has 6 protons and 8 neutrons and will decay (Fig. 1).
theeeeeerrrrrreeee yooooooou goooooo
Answers
Answer:
Thanks for the free points!
and your really pretty! :)
have a great day!
~God bless~
Name 1 object that you would use the following types of measurements for; Mass, Volume and Density.
I need this by 8:30
Answers
Plz help! Everything is below!
(Brainliest and Points)
Answers
Answer:10,000
Explanation:When you look at the chart at 15 degrees, it is at 10,00. Hope this is right <3 Sorry if not :)
2 questions
Popeyes or KFC
Mcdonalds, Wendys, Burger King, Shake Shack, or Chick Fil A
Answers
Answer:
Chick-fli-a
Explanation:
Answer:
Chick-Fil-A
Explanation:
Latitude determines how much intense sun an area gets, but what other factors can impact regional climate?
A. The weather forecast
B. Population
C. Ocean currents, mountains, and altitude
D. The type of animals that live there
Answers
Answer:
B I think sorry if I get this wrong
i know it a bit of questions but i will give you 15 points and branlyest plzzzzzz oh this for sience and DO NOT SEAL MY POINTS thx
1) % of the cells of most living things are made of water.
2) All organisms need a to live.
3) Organisms living on get oxygen from the air.
4) Organisms living in get oxygen from the water.
5) Green plants, algae and some bacteria need both and carbon dioxide.
6) eat other organisms to get food.
Answers
Answer:
70%
air water and food
carbon dioxide
oxygen
a green pigment
heterotroph
Explanation:
sorry if its wrong i used my best of knowledge i didnt rlly understand most of it
Answer:
1) 70% or more
2) Air
3) True
4) False
5) Sunlight
6) Heterotroph
Explanation:
Hope it helps!
Which has a positive charge?
neutrons and the nucleus
protons and neutrons
neutrons and electrons
protons and the nucleus
Answers
protons and the nucleus
Because protons has positive charge. Neutrons have no charge. Nucleus contains protons and neutrons, so it adds up to result in a positive charge.
Having to do with turning a fraction over defines the word _____.
-Inertia
-Inversely
-Force
-Proportional
Answers
Answer:
inertia
Explanation:
Answer:
Inversely
Explanation:
HMH Daily Demo Lab: Water Magic
Electric Charge (guided inquiry)
Purpose: To show how matter becomes charged by induction
Materials: comb, sink with working faucet
Predict: Predict what you think will happen to the charges of the comb and water if the comb comes in contact with the water. Record your hypothesis before following the directions below to carry out the lab experiment. The charges would attract. How and why is what I don’t know.
Directions:
1. Turn on a faucet just enough to allow a thin stream of water to flow.
2. Have a student volunteer-run a comb through his/ her hair a few times.
3. Observe. Tell the student to hold the comb near, but not touching, the stream of water.
4. Answer all questions below in complete sentences, using the R.A.C.E. strategy.
Ask and record your findings: What do you observe? Describe. I observed the stream of water bend toward the comb. I gave the comb electric charge by passing a comb through my sister’s hair and that allowed the comb to bend the stream of water.
Ask and record your findings: What does this indicate (show)? Explain. I
Observe:
1. To test students’ predictions, have the student volunteer pass the comb through the water.
2. Then have them move the comb so that it is near but not touching the water.
Ask and record your findings: What do you observe? Describe. WILL GIVE BRAINLIEST
Answers
this is the question and i dont know which reasoning i should use for the claim "If you follow the instructions, the POW kits will always heat the water above the correct temperature for pasteurization (65°C), but some people didn’t follow the instructions."
Answers
Answer:
I think this evidence supports this claim because Evidence Card b says “One man got sick, but his two children did not. He used water from Whip River. He used the cube to heat the first pitcher of water, which he gave to his kids, and then reused the cube without reheating for the second pitcher, which he drank himself.”
Explanation:
The correct reasoning for the given claim is shown by evidence 2.
What is water pasteurization?
Pasteurization is a method of disinfecting water without boiling it using heat or radiation.
Evidence 2 is the correct reasoning to explain the fact that if we follow the instructions the kit will always heat the water above the correct temperature for pasteurization (65°C). Second evidence is that “One man got sick, but his two children did not. He used water from Whip River. He used the cube to heat the first pitcher of water, which he gave to his kids, and then reused the cube without reheating for the second pitcher, which he drank himself.”
Hence evidence 2 is the correct reasoning.
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I WILL GIVE 20 POINTS AND BRAINLIEST Nuclear energy, elastic energy, chemical energy, mechanical energy, sound energy, and thermal energy are examples of??
Answers
Answer:
answer IS KINETIC ENERGY
help plz?
explain what is sorted sediment. why does it occur?
Answers
Answer:
Particles become sorted on the basis of density, because of the energy of the transporting medium. High energy currents can carry larger fragments. As the energy decreases, heavier particles are deposited and lighter fragments continue to be transported. This results in sorting due to density.
Explanation:
Define the kinetic theory of matter (use these words “explains, energy, particles, increase, decrease.”
Answers
Answer:
The kinetic theory of matter explains that all matter is made of particles which are constantly moving/have energy. The energy varies depending on the temperature of the matter, therefore determining if the matter is solid, liquid, or gas. When the energy of a particle is increased or decreased, a phase change can occur.
The magnet attracts a paper clip at certain distances with -
a. An electrical force
b. A repelling force
c. A pulling force
d. A pushing force
Answers
Answer:
C, A pulling force
Explanation:
It is pulling it to it not repelling or pushing it away. It is also not an electrical force as it is a magnetic one.
Suppose a snack bar is burned in a calorimeter and heats 2,000 g water by 20 °C. How much heat energy was released? (Hint: Use the specific heat equation.) Give your answer in both joules and calorie
Answers
Answer:
Explanation:
Remember that the key is the water so
using the formula q=m*s*deltT
We have the mass 2000g
we have the specific heat of water which is 1.00 cal/ g C
and the final temperature 20 C
Remember that delt T is the change in temperature meaning (Tfinal - Tinitial) Assuming that the water is at room temperature (25 C) before starting the reaction then
q= (2000 g)(1.00 cal/g C)(20-25)
q= -10, 000 cal
if you want you can convert to joules by multiplying by 4.314 J
In more simpler terms - If all the heat released was absorbed by the water, and it takes 1 calorie of heat to raise
the temperature of 1 gram of water by 1°C that is a total of 20 times 2000 or 40,000 cal.
or 40 kilocalories. If you want it in joules, there are 4.184 joules to one calorie so it is
4.184 times 40 or 167.36 kilojoules.
Hope that helped
A snack that, when burned, heats 2,000 g of water by 20 °C, releases 4.0 × 10⁴ cal (1.7 × 10⁵ J).
A snack bar is burned in a calorimeter and heats 2,000 g (m) of water by 20 °C (ΔT).
We can calculate the heat absorbed by the water (Qw) using the following expression.
[tex]Qw = c \times m \times \Delta T = \frac{1cal}{g.\° C } \times 2,000 g \times 20 \° C = 4.0 \times 10^{4} cal[/tex]
where,
c: specific heat capacity of waterAccording to the law of conservation of energy, the sum of the heat absorbed by the water (Qw) and the heat released by the combustion (Qc) is zero.
[tex]Qw + Qc = 0\\\\Qc = -Qw = -4.0 \times 10^{4} cal[/tex]
Finally, we can convert -4.0 × 10⁴ cal to J using the conversion factor 1 cal = 4.18 J.
[tex]-4.0 \times 10^{4} cal \times \frac{4.18 J}{1cal} = 1.7 \times 10^{5} J[/tex]
A snack that, when burned, heats 2,000 g of water by 20 °C, releases 4.0 × 10⁴ cal (1.7 × 10⁵ J).
Learn more: https://brainly.com/question/10987564
The energy humans use in cars originally came from the Sun. Is this statement true?
Answers
Answer:
true All the energy in oil, gas, and coal originally came from the sun, captured through photosynthesis. ... So, in one sense, gasoline-burning cars, coal-burning power plants, and homes heated by natural gas are all solar powered!
Explanation:
Where does Earth receive its energy?
A) its core
B) the sun
C) its atmosphere
D) the hydrosphere
Answers
Explanation:
yoo i need help please my parents are very mad:(
Answers
Answer: I got you! Here are my answers !
Explanation:
1) 14/2=7m/s^2
2)30-0/12=2.5m/s^2
3)37-22/2=7.5m/s^2
4)12-0/8=1.5 km/2^2
5)8-0/3=2.7m/s^2 (cyclist) (Car) 30-0/8=3.75m/s^2
6)70-0/1.94x10^-3=36000km/h^2
7)10-2/4=2m/s^2
Make this brainliest! Thank you!
Compare and contrast the conditions required for snow and rain to form.
Answers
Answer:
Snow forms when the atmospheric temperature is at or below freezing, and there is a minimum amount of moisture in the air. Within a cloud, water droplets condense onto one another, causing the droplets to grow. When these water droplets get too heavy to stay suspended in the cloud, they fall to Earth as rain
Explanation:
When water vapor cools and condenses forms clouds, that is, return to water or rain.
When the temperature in the atmosphere is at or below freezing 0 degrees Celsius and there is a minimal amount of moisture in the air, snow forms.
How does rain form?Clouds are formed by evaporating water or ice from the Earth's surface, or by plants releasing water and oxygen as a result of photosynthesis.
Water evaporates, or rises from the Earth's surface into the atmosphere, creating a gas called water vapor.
When water vapor cools and condenses—that is, returns to liquid water or ice—it forms clouds.
How does snow form?A significant snowstorm or blizzard requires three factors:
Cold air (below freezing).Clouds and precipitation require moisture to form.Clouds and snow form when moist air rises over very cold air.Thus, these are the conditions for snow and rain.
Learn more about snow, here:
https://brainly.com/question/15697193
The speedometer in a car does not measure the car’s velocity because velocity is
Answers
Answer:
Speed in a specific direction
Explanation:
Answer:
It does not indicate the car's direction.
Explanation:
Since velocity is both magnitude and direction, the speedometer measures speed but does NOT measure velocity
(PLEASE answer with the right answers and don't just try and get the points) Answer each one to get 50 points. this is a risk but I really need this question. oh right and thank you to whoever answers! ^>^
Answers
What do members of a particular species living in a specific area always form?
population
individual organisms
community
ecosystem
Answers
Answer:
Yeah, probably population.
Explanation:
Population as in the species' population.
Examples and connections to the word: Analog. 3 of each! Will give brainliest
Answers
Answer: The definition of analog is something that has some common traits with something else. A burger made of soy is similar to a burger made of beef so it is an example of an analog.
Explanation:
Homeostasis means maintaining
Your answer:
varied internal conditions.
varied offspring.
similar offspring.
stable internal conditions.
plz help this for sience
Answers
Santiago is a chemist working to make a new kind of antacid, which is a medicine that helps with stomach pain. He mixed two powdery solid substances together in a sealed container. The diagram above shows the repeating groups of atoms that make up the two starting substances.After mixing, Santiago found two liquid substances in the sealed container. (Nothing had escaped.) Which of the diagrams to the left shows the repeating groups of atoms that make up the ending substances?
Answers
Answer:
C
Explanation:
Santiago mare two powdery solid substances. hope this helped
The diagram which shows the repeating groups of atoms that make up the ending substances is C.
What are repeating group?Repeating group is defined as a group of fields or attributes that show up repeatedly in a database table. It is a widespread issue that affects both big and small businesses, and it can have a variety of effects. An attribute that appears more than once in each row of a table is known as a repeating group. A relational table cannot contain "repeating groups," as they are a feature of pre-relational systems.
On most metals, a reaction could be seen when acids were applied. A gas and heat were created when the metal vanished. The new chemicals' chemical characteristics are distinct from those of the original substances.
Thus, the diagram which shows the repeating groups of atoms that make up the ending substances is C.
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