The skateboarder is travelling with a initial velocity of 12 m/s and slid to stop in the next 2.0 seconds. The acceleration of the skateboarder will be -6 m/s².
What is Acceleration of an object?Acceleration of a body is the change in the velocity with respect to time. Acceleration depends upon factors such as time, initial velocity, final velocity, and distance travelled by the object.
In the given question, the skateboarder is travelling with a initial velocity (u) of 12 m/s
Time (t) after which he comes to a stop is 2.0 seconds
The skateboarder stops and comes to rest therefore, the final velocity (v) of the skateboarder will be zero
The acceleration (a) of the skateboarder can be calculated by the formula:
a = (v - u)/t
where, a = acceleration of the object
v = final velocity of the object
u = initial velocity of the object
t = time elapsed
a = (0 - 12)/2.0
a = -12/2.0
a = -6.0m/s²
Here, the acceleration is negative because the body comes to rest at the end after acceleration.
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Are covalent bonds responsible for cohesion?
Answer:
A covalent bond is a form of chemical bonding and is characterized by the contribution of one or more pairs of electrons between atoms, resulting in a side attraction that holds the resulting molecule together... Atoms tend to contribute or share their electrons in the way that their electronic shell is full. This bond is always stronger than the intermolecular forces like the hydrogen bond...
What could happen if an organism could not maintain homeostasis
When an organism fails to maintain homeostasis, the organism typically becomes ill, and it will die.
what is homeostasis ?homeostasis a self-regulating process in which biological systems tend to maintain stability while adjusting to conditions that are optimal for survival.
If homeostasis is successful, life continues; if unsuccessful, disaster or death ensues, stability attained is actually a dynamic equilibrium, in which continuous change occurs.
Any system in dynamic equilibrium tends to reach a steady state, a balance that resists outside forces of change.
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are molecules bigger than cells in the human body? and this is for science
Answer:
no
Explanation:
Answer:
Molecules are bigger than the cells in our body.
Which of the following does NOT affect earth’s season
Answer:
which of the following???????
Which reason best explains why living things need carbon
Answer:
Its ability to form polymers makes it an ideal partner for molecules that generate life. Carbon is a key chemical element for life and the natural processes that take place on earth.
In what type of location do approximately three-fourths of all structure fires occur?
HELP PLEASE!!
Question 2 (20 points)
A scientist is examining slides of cells from organisms in different groups. What two
features would the scientist use to distinguish a plant cell from an animal cell?
A•presence or absence of mitochondria
B•presence or absence of a cell wall and chloroplasts
C•presence or absence of a nucleus and cell membrane
D•presence or absence of a cell membrane and cytoplasm
The two features would the scientist use to distinguish a plant cell from an animal cell are the presence or absence of a cell wall and chloroplasts. Thus option B is correct.
what is function of chloroplast ?Chloroplasts are the membrane bound organelle present only in photosynthetic organism like plants and algae; They are located in mesophyll cells of leaves and have a high concentration of chlorophyll pigment which absorb sunlight and absent in animal cell.
Chloroplast has extra-nuclear DNA, these are semiautonomous in nature; They synthesize food that is glucose by the process of photosynthesis by absorbing sunlight into chemical energy.
It is major house which involve in the production of NADPH and molecular oxygen (O2) released by the photolysis of water; It also produces ATP from photosynthesis.
It also indirectly participate in generation of carbon and sugar molecule during the Calvin Cycle or dark reaction of photosynthesis.
Thus option B is correct.
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About how many new species did the HMS Challenger find during its journey around the world?
Answer:
the years 1873–76 which, among many other discoveries, catalogued over 4,000 previously unknown species.
Explanation:
Which biome had the lowest average temperature?
A)taiga
B)desert
C)temperate deciduous forest
D)tundra
Answer:
it the tundra
Explanation:
its because it wide and open and has cold air
do plants or animals have mitochndria
Answer:
Both animal and plant cells have mitochondria, but only plant cells have chloroplasts. ... Once the sugar is made, it is then broken down by the mitochondria to make energy for the cell. Because animals get sugar from the food they eat, they do not need chloroplasts: just mitochondria
Explanation:
In this chromatographic experiment, the solvent traveled 6 centimeters. For each band, calculate the Rf value and find the corresponding pigment.
Standard Rf values for pigments: Chlorophyll a 0.60 Chlorophyll b 0.50 Carotene 0.98 Xanthophyll 2 0.15
Answer:
A = 1.2/6 = 0.20 Xanthophyll 2
B = 2.8/6 = 0.47 Chorophyll b
C = 3.5/6 = 0.58 Chlorophyll a
D = 5.8/6 = 0.97 Carotene
Explanation:
what does the cytoplasm do for the cell
Answer:
The cytoplasm holds everything together in the cell. Without it, the organelles would not be able to stay in place.
Explanation:
PLEASE HELP!!! 50 POINTS!!!! All fossil fuels contain this element. Iron Carbon Copper Magnesium
Answer:
Carbon
These fossil fuels are all Hydrocarbons, they are compounds formed from only two elements, Carbon and Hydrogen. Fossil fuels are used to produce energy; in the home they are burned to produce heat, in large power stations they are used to produce electricity and they are also used to power engines.
Explanation:
Answer:
Carbon.
we need it because it is a key ingredient in plastics, gasoline, and other useful materials.
The hydrosphere, lithosphere, biosphere, and atmosphere are all examples of __________.
A)
open systems
B)
closed systems
C)
biological systems
D)
ecosystems
Answer:
The answer is A, open systems!!
Explanation:
all systems on earth are open, except for the earth itself.
Answer:
A
Explanation:
Just took the test
The scientific method includes which of the following? Select all that apply.
hypothesis
analysis
theory
question
Type here to search
ORA
Answer:
it includes hypothesis,analysis,question your welcome
Which two gaseous giants did Renaissance scientists such as Galileo know about?
O Jupiter and Saturn
O Mars and Neptune
o Neptune and Uranus
O Uranus and Saturn
Answer: I think the answer is Jupiter and Saturn . ( please let me know if this answer is wrong please ).
Answer:
O Jupiter and Saturn
Explanation:
I did the test.
Christina is so excited about her wedding that she tells her coworker Meredith it is exactly 43,200 minutes away. Help Meredith figure out how many days away the wedding is so that she can add it to her calendar.
Answer:
The correct answer would be - 30 days.
Explanation:
Given:
Time to go for the marriage - 43,200 minutes
Solution:
we know:
1 hour - 60 minutes
1 day - 24 hours - 60 * 24 = 1440 minutes
so the days in the 43200 minutes would be -
43200/1440 = 30 days.
Thus, the correct answer would be - 30 days.
5. Describe the characteristics of life, display organization, and provide an example.
Answer:
#1 Having cells (cellular)
#2 Growth and development
#3 Responds to stimuli
#4 Reproduce (sexual or asexual)
#5 Homeostasis
#6 Metabolism
#7 Heredity
Explanation:
The characteristics of life that display organization are growth and development, response to stimuli, homeostasis, metabolism, etc.
What is the organization of life?The biosphere is the greatest degree of organization for living things; it includes all lower levels. Organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystems, and biosphere are the biological stages of the organization of living things, ranked from simplest to most sophisticated.
Atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism are the major levels of organization in the body, from the simplest to the most complex.
Therefore, organizational features of life include growth and development, response to stimuli, equilibrium, metabolism, and so on.
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What characteristic of life is demonstrated when a light in a room is turned off and the pupils of your eyes
dilate or get bigger/wider?
Answer:
Dilate
Explanation:
I'm pretty sure is the proper word it's pretty much the same as bigger/wider. I might be wrong I think 70% I might be correct.
Which of the following is true of the structures labeled C in the cell membrane?
Choose 1 answer:
(Choice A) They are proteins.
(Choice B) They are carbohydrates.
(Choice C) They are nonpolar.
(Choice D) They are hydrophilic.
Answer:it’s a
Explanation: they are hydrophilic
The option which is true about the structures labeled C in the cell membrane is they are hydrophilic in nature. Thus, the correct option is D.
What is a Cell membrane?A cell membrane may be defined as a biological membrane that separates the interior of the cells with respect to its outer environment.
In the labeled structure, A is an integral protein, B is a lipid-anchored protein, C is hydrophilic polar lipid molecules, while D is hydrophobic non-polar lipid molecules.
Therefore, it is well described above.
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What type of cells did Theodore Schwann study?
Answer:
peripheral nerve cells
Explanation:
in doing so he discovered a new type of cell surrounding the axons and neurons of nerve fibers – the cells he discovered are now called Schwann cells.
Science- I need help this is due by the end of the the day PLEASE.............:)
Answer:
22 5mL 6mL 7mL 23mL 24ML
Answer:
21.5mL
hope this helps;)
14
What makes one atom different from another?
Answer:
atoms of the same elements differ in mass number. such atoms are called isotopes.
If 2 atoms of gold have the same properties, does an electron have the same properties of gold
Place mercury in the reactor. After a large amount of work, only a tiny portion of gold is created.
Decontaminate the resulting gold. This is harder than it sounds because you can't separate out non-radioactive gold from radioactive gold using purely chemical methods.
It should be obvious from this process that it currently costs much more money to create non-radioactive gold than you could ever earn by selling the gold. Creating gold from other elements is currently an expensive laboratory experiment and not a viable commercial activity. Perhaps technology will improve enough in the future to make creation of gold in nuclear reactors a profitable economic enterprise.
{Need answer in the next 28 min.}
Cohesion and adhesion are responsible for which of the following concepts?
Dehydration synthesis
Capillary action
Dry-ice
Polarity
Answer:
K I'm not sure about this one, but it should be capillary action
Explanation:
This is because cohesion and adhesion have to do with water stick to surfaces. Capillary action occurs because of how the water sticks and bonds to certain surfaces. Cohesion is how water molecules stay together, while adhesion is how water molecules are attracted to other molecules.
List 5 parts/tissues of the body that will suffer the consequences of a Vitamin D deficiency.
Answer: Vitamin D deficiency can lead to a loss of bone density, which can contribute to osteoporosis and fractures (broken bones).
gastrointestinal disorders, renal diseases, and liver diseases.
Explanation:
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Which statement explains how producers are dependent upon consumers for their survival?
O A. Consumers supply oxygen for producers to undergo aerobic respiration.
O B. Consumers produce carbon dioxide for producers to use during photosynthesis.
O C. Consumers provide chemical energy needed by producers for cellular respiration.
o D. Consumers make lactic acid that producers use in photosynthesis.
Answer:it’s B
Explanation:
The option that explains how producers are dependent upon consumers for their survival is as follows:
Consumers produce carbon dioxide for producers to use during photosynthesis.Thus, the correct option is B.
How do producers produce their energy?Producers produce their energy through the process of photosynthesis which involves the active role of carbon dioxide and water in presence of sunlight through which the inorganic carbon of carbon dioxide is converted into the organic carbon of carbohydrate (glucose).
This carbon dioxide for plants is delivered by the consumers through exhaled respiration.
Therefore, the correct option for this question is B.
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A hypothesis is
A.
a summary of events written in a particular fashion.
B.
a statement that proposes a possible explanation to some phenomenon or event.
C.
the process of experimentation designed specifically to disprove a scientific theory.
D.
the result of a scientific experiment performed for the purpose of proving a theory.
Answer:
B
Explanation:
name the 4 types of particles in the atmosphere
Answer:
-Nitrogen
-Oxygen
-Argon
-Carbon dioxide
Soil generation and soil conservation are equally effective agricultural strategies.
Please select the best answer from the choices provided
x T
✓ F
The answer is B. False
Answer:
False
Explanation:
Soil generation and soil conservation are equally effective agricultural strategies. The statement is false.
What is soil ?
The soil is nothing but a mixture that contains minerals, organic matter, and living organisms, it is a loose sediment. Moreover, there are different types of soil such as Clay Soil, Sandy soil, Loamy Soil, Silt Soil
soil composed of 45% minerals, 50% spaces or voids and 5% organic matter, it performs many important functions such as Providing a growth medium for the plants, Acts a modifier of the earth’s atmosphere and it is One of the most crucial components of the biosphere
The formation of soil occur by weathering of rocks. the weathering of Solid rock can weather occur in three way such as Mechanical Weathering, Chemical Weathering, Biological Weathering
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