calcium hydroxide : chemicals are Quicklime and water
Which of the following is the only contact force?
A Gravity
B Applied
C Magnetism
D Electricity
Answer:
Explanation:
Free point SHEEEEEEEEEEEEEEEEEEEESH how you like it
PLEASE HELP ME WITH THIS!!!
You have been given an unknown plastic. You investigate and find out that the unknown plastic sinks in water but floats on dish soap.
Which plastic do you have?
A. PET
B. HDPE
C. PVC
D. PS
Answer:
D:PS
Explanation:
Looking at the table we can see that PS floats on dish soap and sinks in water.
Which solute would be more effective at lowering the freezing point of water: MgCl2 and KNO3? Explain.
Answer:
AlCl₃.
Explanation:
Adding solute to water causes depression of the boiling point.
The depression in freezing point (ΔTf) can be calculated using the relation:
ΔTf = i.Kf.m,
where, ΔTf is the depression in freezing point.
i is the van 't Hoff factor.
van 't Hoff factor is the ratio between the actual concentration of particles produced when the substance is dissolved and the concentration of a substance as calculated from its mass. For most non-electrolytes dissolved in water, the van 't Hoff factor is essentially 1.
Kf is the molal depression constant of water.
m is the molality of the solution (m = 1.0 m, for all solutions).
(1) NaCl:
i for NaCl = no. of particles produced when the substance is dissolved/no. of original particle = 2/1 = 2.
∴ ΔTb for (NaCl) = i.Kb.m = (2)(Kf)(1.0 m) = 2(Kf).
(2) MgCl₂:
i for MgCl₂ = no. of particles produced when the substance is dissolved/no. of original particle = 3/1 = 3.
∴ ΔTb for (MgCl₂) = i.Kb.m = (3)(Kf)(1.0 m) = 3(Kf).
(3) NaCl:
i for KBr = no. of particles produced when the substance is dissolved/no. of original particle = 2/1 = 2.
∴ ΔTb for (KBr) = i.Kb.m = (2)(Kf)(1.0 m) = 2(Kf).
(4) AlCl₃:
i for AlCl₃ = no. of particles produced when the substance is dissolved/no. of original particle = 4/1 = 4.
∴ ΔTb for (CoCl₃) = i.Kb.m = (4)(Kf)(1.0 m) = 4(Kf).
So, the ionic compound will lower the freezing point the most is: AlCl₃
BRAINLIEST IF CORRECT
Answer:
1 a person sings into a microphone
2 the sound is converted into an electrical signal
3 the analog signal is converted into a digital signal made of many samples of the digital sound
4 the samples of the sound is converted into 1s and 0s
5 the digital pattern is converted to a medium such as a hard disk or flash drive
Explanation:
BRAINLIEST IF CORRECT
Answer:
When you have many birds for one and they eat these berries (All Berries have seeds) then you have these birds dropping their feces all over the country and others Then that spreads these plants and berries to new places.
Explanation:
This is also known as Seed Dispersal.
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Hope this helped
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Answer:
Digital recordings
Explanation:
Digital recordings are just better because one: you don't have to wait a long time for the music. It's like streaming movies, but for music.
You can download digital recordings.
You can share digital recordings using social media or text messages.
PLSSS HELLLPPP MEEEE PLSSSS
Explain how the Colorado River formed the Grand Canyon.
The Grand Canyon is one of the most breathtaking places in the world. As you look over the rim of the canyon, it is possible to see rock layers that are more than one billion years old! Winding along the canyon floor is the Colorado River.
Which of the following statements are true? (There are 2)
A compass needle is affected by Earth's magnetic field.
A magnetic field flows though the inside of a magnet.
Materials such as wood and plastic can become magnetized.
Electrons are responsible for generating magnetic fields.
Answer:
A and B
Explanation:
the other two make no sense at all
I beg you to help me in this and im gonna mark u as brainliest but fassttt
Explanation:
F = nucleus
G = cell membrane
H = cytoplasm
J = cell wall
k = vacoule
L = plastids
mark me brainiest?
Which option is an example of a chemical property?
melting point
density
ability to decompose
color
please help me
Select items from the list below that are NOT characteristics of invasive species. Hint: there are four (4).
A. only plants
B. only animals
C. can be plants or animals
D. harmful to ecosystems
E. support biodiversity in ecosystems
F. have unique adaptations
G. come from the local environment
H. come from other parts of the world
I. introduced intentionally
J. introduced by accident
ANSWER ASAP PLEASE
According to this table, which star has the highest absolute brightness?
a. Betelgeuse
b. Rigel
c. Bellatrix
Answer:
B. Rigel
Explanation:
if max has a blood type AB and ava is pure bread blood type A, What is the chance their child will have blood type A, B, AB, O
What is the molarity of a solution that contains 50.0g of NaOH (molar mass = 40 grams/mole) in 2.0L of solution?
What environmental change happens when the number of prey in a certain area decreases?
Climate change
Increased predators
Pollution
Reduced space
Question:
What environmental change happens when the number of prey in a certain area decreases?
Answer:
C) Pollution.
In an ecosystem, there is an increase in the number of predators when the number of prey in a certain area decreases.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
Learn more about ecosystem,here:
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The biggest distinction between a eukaryotic cell and a prokaryotic cell is:
A) The mode of reproduction
B) The overall size
C) The presence or absence of a nucleus
D) The presence or absence of certain organelles
Answer:
Hello There!!
Explanation:
I believe the answer is C) The presence or absence of a nucleus.
hope this helps,have a great day!!
~Pinky~
Cacti have thick stems with lots of sharp spines. How do the spines help the cactus survive?
They allow the cactus to capture more sunlight.
They help the cactus grow taller stems.
They help the cactus produce colorful flowers.
They protect the cactus from being eaten by animals.
Answer:
D) They protect the cactus from being eaten by animals.
Explanation:
Cacti have thick stems to keep the animals away.
BRAINLY IF CORRECT
Select an animal from that you may know about and explain how physical and behavioral adaptations increase the chances of successful reproduction. Use evidence and scientific reasoning to support your response.
The cheetah (Acinonyx jubatus) will be the subject of my discussion. Cheetahs are the world's fastest land mammals, and they have evolved in both physical and behavioural ways to improve their chances of having offspring.
What is the behavior of A Cheetah ?First off, cheetahs have a highly effective circulatory system that includes bigger hearts and lungs, as well as a surplus of capillaries and red blood cells to carry oxygen to their muscles. This gives them the ability to pursue prey at speeds of up to 75 mph, increasing their likelihood of catching it and providing food for themselves and their young.
Second, cheetahs have a distinctive fur pattern that makes it simpler for them to blend into their surroundings and sneak up on their prey.and draw near enough for an effective assault. They can sprint rapidly and effectively because to their long legs and big feet.
Last but not least, cheetahs have a variety of behavioural modifications that improve their chances of having offspring. For instance, they create social groupings where the mothers look after the babies while the males go food hunting and guard the young from predators.
They also have a strong sense of smell that allows them to detect potential prey from far away. They get an edge in hunting and have a better probability of feeding their offspring as a result. In summary, cheetahs have a variety of morphological and behavioural adaptations that raise their likelihood of having offspring. Among these modifications is an extremely effective cardiovascular system.
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Why is it so easy to see venus and so hard to see Neptune? Give two reasons
Answer:
Neptune is directly opposite the sun in Earth's sky
Explanation:
You need a telescope because its far away from earth and also the moon has phases so does the planets and now we have a full neptune.
Which solution would freeze at a lower temperature? Explain your reasoning.
Answer:
Explanation:
The solution which has the lowest freezing point temperature is one which has the highest depression in freezing point ( ΔT The depression in freezing point is a colligative property and depends on the number of solute particles. Greater is the number of solute particles, greater is the depression in the freezing point.
Where is a magnet the strongest?
Answer:
North and South pole
Explanation:
Magnets are usually made of metal. They repel and attract other metal. A magnet's force is strongest at its north and south poles. Each magnet is surrounded by lines of force and a magnetic field.
3. Why didn't the geologist include dates in the notes for the sedimentary rock layers?
Answer:
Answer:
you smell good
Explanation:
(;
please help me before june 13th
Place the following items in the correct order to show how a voice could be recorded and saved using a digital device.
Answer:
1. person sings
2. sound converted into signals
3. sounds converted into ones and zeros
4. the digital pattern
5. the analog
Explanation:
Is this a chemical reaction?
Answer:
I dont think so.
Explanation:
A chemical reaction is when there is a change in the substance. For example fizzing, bubbling, and changing colors are all examples of a chemical reaction.
help. help. help. help. -_- please help me. im desperate. literally.
Answer:Post this to the collage or higher level Desperately
Explanation:
What type of adaptation does seaweed have that allows it to survive and grow in underwater environments?
Learned behavior
Inherited behavior
Physical characteristic
Life cycle difference
BRAINLIEST IF CORRECT
Answer:
indeed!
Explanation:
BRAINLIEST IF CORRECT
BRAINLIEST IF CORRECT (put them in order)
Answer:
what grade are you in and i think it is D
Explanation:
Answer:
1 a person sings into a microphone
2 the sound is converted into an electrical signal
3 the analog signal is converted into a digital signal made of many samples of the digital sound
4 the samples of the sound is converted into 1s and 0s
5 the digital pattern is converted to a medium such as a hard disk or flash drive
Explanation: