Answer:
Chemical change
Explanation:
Which definition is correct?
a physical change creates a new substance because bonds are broken or formed
a physical change can happen without changing any characteristics of the substance
a chemical change occurs when the substance remains the same but the shape, or other physical characteristics change
a chemical change produces a new substance by breaking and forming new bonds
Answer:
last one is correct
Explanation:
bcoz when a reaction takes place there is the formation of new products with the help of old one .
What do cells need to get energy from food?
A. Carbon dioxide
B. Oxygen
C. ammonia
D. Vitamin C
Answer:
I believe the answer is B oxygen
Explanation:
would be awesome if you could give me brainliest!
did you know you have to answer 1000 questions to be able to message someone?
Answer: i didnt know that
Explanation:
Answer: Yes this is in fact true
Explanation:
When we talk about substances dissolving we usually follow the rule " like disssolves like". What does that mean? (selct TWO correct answers)
Nonpolar molecules will dissolve other nonpolar molecules
Nonpolar molecules will dissolve polar molecules
Polar molecules will dissolve nonpolar molecules
Polar molecules will dissolve other polar molecules
Answer:
hope it helps
Explanation:
Polar molecules will dissolve nonpolar molecules
Polar molecules will dissolve other polar molecules
Please i really need help
Answer:
in my opinion the answer is A
20 points and very easy-
Match the following with the letters and numbers below:
1. Energy of an objects position above the ground
2. Stored in the bonds of atoms and molecules
3. Stores in the nucleus of an atom
4. Energy of vibrating molecules
5. Movement of objects used to do work
6. Created by vibrations in electric and magnetic fields
A. Heat
B. Mechanical energy
C. Nuclear energy
D. Chemical energy
E. Light
F. Gravitational energy
Thank you in advance!! Please hurry!
Is a comet found between Mars and Jupiter
This is a Yes or No question
Thank you, Subject is science
Answer:
yes there is a comet
Explanation:
Rocks around mid-ocean ridges teach scientists about
A. how wide abyssal plains are
B. how earthquakes happen
C. changes in the earth's crust
Will give brainlest
Answer:
I think is C
Explanation:
PLEASE MARK ME AS BRAINLIEST
Thermal energy “flows” from warmer areas to colder areas. Heat is a measure of this flow.
True or False
Answer:
True
Explanation:
Throughout the universe, it's natural for energy to flow from one place to another. And unless people interfere, thermal energy — or heat — naturally flows in one direction only: from hot toward cold. Heat moves naturally by any of three means. The processes are known as conduction, convection and radiation.
The statement, "Thermal energy “flows” from warmer areas to colder areas. Heat is a measure of this flow" is true.
What is thermal energy?The energy created by heat is referred to as thermal energy. It is created when a body's temperature rises. As a result, the molecules, and atoms start to sprint, move quickly, or crash into one another.
When a substance's temperature rises, heat, a type of energy, is created. Temperature, thermal energy, and heat all relate to one another. Heat always moves from a hot body to a cold body.
The heat or thermal energy in the body increases as the temperature rises, causing the movement of the atoms to accelerate and the atoms to collide. Heat is a variable of thermal energy.
Thus, the statement is true.
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Speed is defined as the distance an object travels per unit of time. Which TYPE of speed is observed when you look at the speedometer of a car?
Question 7 options:
A)
Constant Speed
B)
Instantaneous Speed
C)
Average Speed
This photo shows a kind of reproduction. Which of the following describes this type of reproduction?
A. Two parents are required to produce this offspring.
B. Each offspring has a different combination of genes.
C. The offspring have identical genes.
D. Parents make reproductive cells with only half of their genes.
A. Two parents are required to produce this offspring.
What is the mass of the ethyl alcohol that exactly fills a 400.0 mL container? The density of ethyl alcohol is 0.789 g/mL.
Answer:
g = (0.789 g/mL) (200.0 mL) = 158
The mass of ethyl alcohol that exactly fills 400 ml of container is 315.6 grams.
How is mass related to density?Formula of density is given as , density =mass/volume
∴mass=density×volume
From the formula it is evident that density and mass are directly proportional while density and volume are inversely proportional.
From the given data, volume=400 ml and density =0.789 g/ml
∴by the formula,mass=density×volume
mass=0.789×400
mass=315.6 g
Mass and volume are extensive properties that depend on the amount of substance while density is an intensive property and does not depend on amount of substance.
Intensive properties are properties which are independent,wherein size of particles does not change.These properties cannot be easily computed and are not easily identifiable.
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Is a comet between Mars and Jupiter?
What is a comet?
What is a asteroid? Not an asteroid belt
:D...........
.............
Answer:
Yes, there are comets between Mars and Jupiter.
Comets are cosmic snowballs of frozen gases, rock and dust that orbit the Sun.
Asteroids are small, rocky objects that orbit the Sun.
Identify the following as examples of abiotic or biotic factors. Mark “A” for abiotic factors or “B” for biotic factors
_________Climate
_________Grass
_________Seaweed
_________Soil
_________Coyote
_________Altitude
_________Precipitation
_________Termite
_________Spider
_________Sunlight
Answer:
Explanation:
Climate - Abiotic
Grass - Biotic
Seaweed - Biotic
Soil - Abiotic
Coyote - Biotic
Altitude - Abiotic
Precipitation - Abiotic
Termite - Biotic
Spider - Biotic
Sunlight - Abiotic
Put the levels of organization in order with 1 being the largest and most complex and 7 being the smallest and most specific.
Question 3 options:
ORDER
CLASS
KINGDOM
SPECIES
PHYLUM
GENUS
FAMILY
DOMAIN
Hey Guys... I need help again...
Having freckles (F) is dominant over not having freckles (f). A parent with freckles is crossed with a parent without freckles. The Punnett square shows the possible genotypes of the offspring.
What is the genotype of each square?
A: FF Ff ff
B: FF Ff ff
C: FF Ff ff
D: FF Ff ff
Answer:
A: Ff
B: ff
C: Ff
D: ff
Explanation:
You basically look at the box it's asking for, let's use A as an example. On the top where the A column is there's F, so that's one of the thingys I forgot what they're called. Next look at the row of A, and there's f. Put the 2 together and you get Ff. Reminder that any uppercase ones come first.
Which elements have 8 valence electrons?
Answer:
Any element in group 18 has eight valence electrons (except for helium, which has a total of just two electrons). Examples include neon (Ne), argon (Ar), and krypton (Kr).
When citric acid reacts with baking soda, a salt, water and a gas are produced. What is the name of the gas?
a) carbon dioxide
b) oxygen
c) sodium citrate
d) water vapor
Answer:
The answer is A
Explanation:
What do you understand by Biological nitrogen fixation? PLEASE ANSWER RN
Answer: Because it is the principal source of the nitrogen in the soil, nitrogen that plants need to grow, nitrogen fixation is one of the most important biochemical processes on Earth. Nitrogen within living organisms is eventually decomposed and converted to atmospheric nitrogen.
Answer: Nitrogen fixation is a process by which molecular nitrogen in the air is converted into ammonia or related nitrogenous compounds in soil.
Explanation:
Please help, I’ll fr give 5 stars and Brainliest ;-;
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Noah rides his bike 16 kilometers in 2 hours. What is his average speed?
Question 9 options:
A)
8 miles per hour
B)
8 kilometers per hour
C)
32 meters per hour
PLEASE ANSWER THIS I AM DOING SCIENCE AND IT SUCKS
WHICH ONE IS A SCIENTIFIC PROBLEM
The fingerlings grown in 5% saline solution will grow
faster than the fingerlings grown in 10% saline solution.
What is the growth rate of the fingerlings in 5% saline
and 10% saline solutions?
FIRST TO ANSWER GETS 30 POINTS
Classify the following as physical, biological, applied science
1. Chemistry 7. Parasitology
2. Zoology 8. Volcanology
3. Engineering 9. Genetics
4. Metallurgy 10. Pasteurization
5. Medicine 11. Aviation
6. Microbiology 12. Bacteriology
Explanation:
Chemistry is physical
Zoology is biological
Engineering applied
Metallurgy applied
Medicine biological
Microbiology biological
Parasitology biological
Volcanology physical
Genetics biological
Pasteurisation biological
Aviation physical
Bacteriology biological
Two cars are moving with the same speed. The VELOCITY of both cars will be the same if the cars are moving in:
1. circles.
2. parallel paths.
3. straight lines.
4. the same direction.
Answer:
4. the same direction
Explanation:
they would have the same speed adn the same direction.
Velocity is speed+direction
Which best protects animal species that are endangered due to overhunting?
laws
increased biodiversity
poaching
captive breeding
Answer:
i believe the correct answer is d.) the correct answer is captive breeding but if its not im sorry
Answer:
captive breeding
Explanation:
Brainliest answer please im not wasting my points for no reason please this is the last one and then im done please thank you
What do the solid lines on the topographic map represent?
A. changes in rock types
B. lines of equal pressure
C. lines of equal elevation
D. changes in vegetation
Answer: I think it’s C
Explanation:
Helium is a "special" element in Group 18 because it does not have 8 valence electrons. Why doesn't helium have 8 valence electrons like all the other elements in group 18?
C IS THE ANSWER BECAUSE HELIUM HAS JUST 2 ATOMS
Helium is an element which belongs to a family called noble gas.
Among the noble gas element, helium is the only member with two (2) electrons.
Helium is a s-block element. S-block can only accommodate a maximum of 2 electrons. The two (2) electrons that helium has complete its outermost shell as seen from its electronic configuration below:
He (2) => 1s²Since the outermost shell of helium is completely filled, it is thus included in the noble gas family (i.e group 18).
Other members of the this group include: Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn)
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NASCAR fans love race day when they get a chance to cheer their favorite team! If a driver was able to travel 600 miles in 3 hours, what is her average speed? Be sure to use the correct formula (s=d/t)
Question 8 options:
A)
1800 mph
B)
200 mph
C)
300 mph
200 mi/hr
Step-by-step explanation:
s= d/t 600 miles/3 hrs = 200 miles/hr
BTW I Love NASCAR
(04.01 MC) 20 POINTS!!!!!!!!!!!!!!
Greg wrote the following steps in the formation of sedimentary rocks.
Step 1: Weathering of rocks forms sediments
Step 2: Sediments are heated
Step 3: Sediments are deposited
Step 4: Compaction and cementation forms rocks
Which step contains an error?
Select one:
a. Step 1
b. Step 2
c. Step 3
d. Step 4
300 g of requires 30000 J of thermal energy to raise the temperature from 25 °C to 85 °C, what is the heat capacity of water? ANSWER ASAP PLEASE
According to the concept of specific heat capacity, the heat capacity of water is 1666.67 J/Kg°C.
What is specific heat capacity?Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.
It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.
It is given by the formula ,
Q=mcΔT
Substitution of values in the above equation, c=30000/0.3×(85-25)
c=1666.67 J/kg°C
Thus, the heat capacity of water is 1666.67 J/Kg°C.
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