Answer:
D!
Explanation:
Question 7 of 10
What is the difference between a scientific law and a scientific theory?
O A. A scientific law has been proved with scientific evidence. A
scientific theory can change when new evidence is found that
does not support the theory.
B. A scientific law is supported by research. A scientific theory is only
an educated guess.
C. A scientific law describes how natural events happen. A scientific
theory is an explanation of natural events.
D. A scientific law involves mathematics. A scientific theory is a
description based on observations.
Answer: I belief its B. A scientific law is supported by research. A scientific theory is only an educated guess.
-Like theories, scientific laws describe phenomena that the scientific community has found to be provably true. Generally, laws describe what will happen in a given situation as demonstrable by a mathematical equation, where as theories describe how the phenomenon happens.
4. Two objects were lifted by a machine. One object had a mass of 2 kilograms, and was lifted a t a speed of 2 m/sec. The other had a mass of 4 kilograms and was lifted at a rate of 3 m/sec.
Question a. Which object had more kinetic energy while it was being lifted?
Question b. Which object had more potential energy when it was lifted to a distance of 10 meters? Show your calculation.
Explanation:
a) Case1, by the formula, ke=½mv².
m=2kg, v=2m/s
ke = ½×2×2² = 4J
Case2, by the formula, ke=½mv².
m=4kg, v=3m/s
ke = ½×4×3² = 18J
therefore, the second object has more kinetic energy.
b) Case1, by the formula, pe = mgh
m=2kg, g=9.8m/s²(not given)(can consider 10m/s² when given), h= 10m
Pe1(write 1 in subscript) = 2×9.8×10= 196J.
Case2, by the formula, pe = mgh
m=4kg, g=9.8m/s²(not given)(can consider 10m/s² when given), h= 10m
Pe2(write 2 in subscript) = 4×9.8×10= 392J.
so, the object 2 has more potential energy.
hope this helps you.
which statement concerning rare threatened or endangered species is true
Why does the moon appear to change shapes in the sky?
A. The gravity on the moon from the Earth changes the shape.
B. The light reflected off the moon from the Earth changes.
C- The amount of sunlight
reflected off the moon changes its shape as seen on Earth.
D- The relative position of the Sun, Moon, and Earth changes the amount of reflected sunlight that we see.
Answer:
D
Explanation:
Which is the most practical approach that can be done by anyone to reduce dependence on nonrenewable energy sources
The most practical approach that can be done by anyone to reduce dependence on nonrenewable energy sources are solar panels, electric vehicles, and energy-efficient appliances.
What do you mean by Nonrenewable energy?Non-renewable energy may be defined as that energy that will run out or will not be replenished for thousands or even millions of years.
Increase the use of electric and hybrid vehicles, install solar panels in a large amount, excessive use of energy-efficient appliances in the home, and the three R's are the most practical approach that can be done by anyone to reduce dependence on nonrenewable energy sources.
Therefore, it is well described above.
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Which of the following metabolic processes uses the most energy?
A. Growth and repair
B. Digestion
C. Exercise and warmth
D. Excretion
Answer:
Explanation:
Answer would be c
Answer:
Growth and repair (A)
Explanation:
Growth and repair takes up 70% of energy. Hope this helps! :)
Why would you use sodium hydrogen carbonate in an investigation
Answer:
Investigating photosynthesis. The effect of light intensity on photosynthesis can be investigated in water plants. ... Sodium hydrogen carbonate - formula NaHCO 3 - is added to the water to supply carbon dioxide - a reactant in photosynthesis - to the plant.
Explanation:
hope this helps
the process of bacterial reproduction is referred to as
Answer:
binary fission
Explanation:
Explain what must happen before a cell can divide
Answer:
the cell must go through mitosis and chromosomes in the nucleus must double
How can regular participation in physical activity improve an individual's overall health?
A.
Regular participation in physical activity reduces the risk of developing various diseases.
B.
Regular participation in physical activity allows an individual to function on less sleep.
C.
Regular participation in physical activity reduces the need for a balanced diet.
D.
Regular participation in physical activity prevents an individual from developing certain diseases.
Please select the best answer from the choices provided.
A
B
C
D
Answer:A
Explanation:
is this correct ? ...
Answer:
The compression-ventilation ratio for CPR is 15 compressions to 2 ventilations. So the answer here is 4, not 2.
If you take a freshwater animal and transfer it to seawater for 60 days, what do you expect to see when you perform immunocytochemistry
Answer:
Explanation:
You could expect the to die because fresh water animals need fresh water to survive and seawater animals need sea water to surrive
in what generation does this population reach its carrying capacity
Answer:
The logistic population growth happens as the growth rate declines as the population exceeds the carrying power. The highest number of people in a community that the ecosystem can sustain is carrying capacity.
Explanation:
A population may reach its carrying capacity in any generation, depending on a variety of factors such as the availability of resources, predation, competition for resources, and other ecological and evolutionary processes.
What is carrying capacity?The carrying capacity of a population is the maximum number of individuals that can be supported by a particular environment over a given time period. A population may reach its carrying capacity in any generation, depending on a variety of factors such as the availability of resources, predation, competition for resources, and other ecological and evolutionary processes.
For example, if a population of animals is introduced to a new habitat with abundant resources, it may be able to grow rapidly and reach its carrying capacity relatively quickly. On the other hand, if the population is facing competition from other species or is subjected to predation or other limiting factors, it may take longer for the population to reach its carrying capacity.
It's important to note that the carrying capacity of a population is not a fixed value, and it can change over time due to changes in the environment or the population's own characteristics. For example, if the population grows to a size that exceeds the carrying capacity of its environment, it may begin to experience negative impacts such as resource depletion, disease outbreaks, or other factors that can reduce its size and bring it back down to the carrying capacity.
Learn more about carrying capacity, here:
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#SPJ2
In a laboratory experiment, researchers placed guppies in three different types of pools: no predation, low predation, and high predation. Researchers hypothesized that predation is a selective force and that large, brightly colored guppies are more conspicuous to predators. Based on that, what would predict the guppies will look like in the pool with high predation after 10 generations?
A) They should be smaller and not very brightly colored
B) They should be large and brightly colored
C) They should be very small and very brightly colored
D) They should be very large but not very brightly colored
Answer:
A) They should be smaller and not very brightly colored
Explanation:
I just took the test. Good luck friend!
4) A change in the natural sequence of bases in DNA structure is called a
Answer:
Mutation
Explanation:
A mutation is a change in the sequence of genetic letters, called bases, within a molecule of DNA.
100!!! Points
Part A
Tectonic plate movement is the reason why northern California has a very different landscape than southern California. Two different tectonic plates, each moving in different directions, border the western side of the North American Plate. Use the map to identify the two tectonic plates that border the North American Plate to the west.
map of the world's major and minor tectonic plates
Part B
On the map, take a close look at the boundary along southern California and Mexico’s Baja California Peninsula. The arrows on the map show the direction and speed of the plates along this boundary in millimeters per year. Based on the speed and direction of the arrows, identify the type of plate boundary at this location. Which landforms or events are likely to occur there as a result? (Hint: It may be helpful to model the motion of the plates using your hands or pieces of paper.)
a map of North America with the fault lines marked
Answer:
Where's the map?
Explanation:
Edpuzzle: Fermentation - Amoeba Sisters
Answer:
=amoeba sisters
Explanation:
Which molecule is a product of respiration?
A. carbon dioxide
B. protein
C. glucose
D. oxygen
Answer:
A
Explanation:
respiration is the process by which living organisms(animals) take in oxygen a d give out carbon dioxide. this is not used for plants because plants take in carbon dioxide and give out oxygen
Which of the following gives bones their rigidity?
Answer:
b. Minerals
Explanation: is correct
how would a plant be affected by immersion in a 5% salt solution?
Answer:
A person’s cells would also lose water that they need for normal life functions, which would disrupt homeostasis (a stable internal environment) causing that person’s cells and eventually that person to die!
Explanation:
In order to see cells clearly in a section of plant tissue, which magnification would you have to use? А x5
B x 10
С X100
D X1000
Ratio
L guess you idiot
A mouse's tail gets cut off. If the mouse has babies later, how will this affect the length of the tails of its offspring
Answer:
no it will not affect the length of the tails of any of the offspring.
The bright color pigment of some frogs serves as a warning to predators. This chemical defense is known as ___.
Answer:
A pose mat is m
Explanation:
I searched it , but basically a pose mat i s m is when an animal is brightly coloring to warn predators that it is not worth eating.
Put the first word together, brainly wont let me post
The bright color pigment of some frogs is processed as a warning to vampires. This chemical defense is understood as poisonous.
What is Chemical defense?
These bright colors serve as a warning to predators: "Don't consume me; because it is poisonous." In this consideration, frogs aren't overhead bluffing.
Some nonpoisonous species of frogs have assumed the colors of poison dart frogs to trick vampires into offering them an expansive berth they don't earn.
This technique is prompted by melanin, a dark pigment. These frogs usually combine in with their surroundings and their skin functions as camouflage.
Different anurans are brightly embroidered. When If the bright colors alternate with opaque splotches the coloring may serve as a warning to predators that the frog or toad is poisonous.
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what determines how closely related 2 species are?
Answer:
Before: (Darwin did) Physical features and behavior
Now:
DNA Testing
Explanation:
Similarities are often easy to see when one looks at two organisms that evolved from a common ancestor, and until recently, looking at physical features and behavior was the only way to determine how closely related two organisms are. However, now scientists can also analyze DNA to discover how closely organisms are related. Every living creature has DNA, which has a lot of inherited information about how the body builds itself. Scientists can compare the DNA of two organisms; the more similar the DNA, the more closely related the organisms. This method can also help when looks are deceptive. One example of looks being deceptive is: The bat and the crow both have wings, and the squirrel does not. From this, one may think that bats and crows are more closely related than bats and squirrels, while the opposite is indeed the case.
help pls pls pls pls
Answer:
2) =b
Explanation:
I don't know others unu
the term meaning the freeing of a kidney from adhesions is:
Answer:
Ureteroplasty is surgery to remove the stricture.
Explanation:
The following list of events happens during meiosis:
Prophase I: Crossing over between homologous chromosomes occurs.
Metaphase I: Tetrads line up at the metaphase plate.
Anaphase I: Tetrads are separated.
Telophase I: Nuclear envelopes reform around the separated chromosomes.
Prophase II: Chromosomes condense.
Metaphase II: Chromosomes line up at metaphase plate.
Anaphase II: Sister chromatids separate into daughter chromosomes.
Telophase II: Nuclear envelopes reform around the daughter chromosomes.
Identify the answer choice that correctly lists the events from above that lead to new genetic combinations in the gametes.
(1 point)
1 and 2
1, 2, and 5
5 and 6
5, 6, and 7
Meiosis is a form of cell division that occurs in the sex chromosomes. This form of division ensures genetic diversity and also allow for the chromosome set to be halved.
The events from above that lead to new genetic combinations in the gametes include:
Prophase I: Crossing over between homologous chromosomes occurs.
Metaphase I: Tetrads line up at the metaphase plate
(1 and 2) option a.
During meiosis, possibilities of new genetic combinations occurs which allows for variations to exist between the offspring and parents. These ensures that offspring are not entirely identical to the parents and also allow for survival and other benefits.Learn more about genetic combinations: https://brainly.com/question/8418041
green plants use _______ and ________ as raw materials for photosynthesis
Answer:
Water and carbon dioxide.
Explanation:
Higher concentration of water than the cell.
Water flows out the cell
Describe the role that rivers and streams play in the water cycle.