Donna has observed that her father can control the speed of their grandfather clock by adjusting the
height of the weight on the end of the pendulum. Donna thinks that the pendulum will move faster when
the weight is lowered, and wants to test her idea. Donna gets a stopwatch and measures the time it takes
for the pendulum to swing twenty times when the weight is moved to its lowest position. Donna begins to
move the pendulum up by 1 cm and continues to measure the time for twenty swings of the pendulum.
Donna records her data.
The missing part of the question is as follows:
Position Time (seconds)
1 23.23
2 21.56
3 20.33
4 19.00
5 18.02
Hypothesis: ____________
Dependent Variable: ____________
Independent Variable: ________________
Constants: __________
Control Group:_________________
Experimental Group: ____________
Answer:
Hypothesis:
if the weight is lowered the pendulum will move faster
Dependent Variable:
Time it takes the pendulum to swing or move
Independent Variable:
the position of the weight
Constants:
same weight and the same number of swings
Control Group:
pendulum at the lowest position
Experimental Group:
different height of pendulums
Explanation:
A hypothesis is a possible explanation for the observation in a given experiment which is "if the weight is lowered the pendulum will move faster" as it states the effect of length of the pendulum on the time it takes to swing.
The dependent variable in an experiment is affected and measured to see the effect which is the time it takes the pendulum to swing or move which is measured here and affected by the independent variable that is the position of the weight.
Constants are the variable that remains constant throughout the experiment that is the same weight and the same number of swings. Control group is the group of subject or condition which minimize the effect of factors or variables except one factor to compare or ensure if the experiment works that are pendulum at the lowest position. The experiment group is the group of a subject that get treatment desired to influence the dependent variable that is the different height of pendulums.
Plz hurry if u can. What is the momentum of a 100-kg football
player running north at a speed of 4 m/s?
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how do ferns reproduce?
Ferns produce male and female cones.
Ferns produce spores under its leaves.
Ferns produce egg and sperms cells in the leaves.
Ferns produce flowers that contain egg and sperm cells.
Answer:
The answer is C.
Explanation:
Most ferns reproduce differently, and that involves meiosis and fertilization. When you are thinking of the typical big fern plant, what it does is, by meiosis, produces spores, and spores have half the number of chromosomes of the big parent plant. The spores are released into the wind.
Answer: The correct answer on Ody2020 is: Ferns produce spores under its leaves.
Explanation: Got it right on the assignment.
Identify and describe the process that describes the movement of water in cells.
Explanation:
Osmosis is the process in which a solvent moves from a solution of low concentration to a solution of higher concentration . A gradient is followed for this movement and once the concentration of both the solutions(on either sides of the membrane) becomes equal the solvents stop flowing.
What valuable information was gained from Mendel's dihybrid crosses?
Select all that apply.
Statistical and probability methods can be used to determine how likely an offspring is to inherit
certain traits
Inheritance of one trait does not affect inheritance of another.
Not all traits are controlled by genes. In most plants, genes only determine traits that affect
flower color.
Genes are inherited differently in plants than they are in animals.
Answer:
the first one
Explanation:
none of the others are true.
Answer:
Explanation:
Statistical and probability methods can be used to determine how likely an offspring is to inherit certain traits.
Inheritance of one trait does not affect inheritance of another.
The what produced during photosynthesis can also be used to form cellulose.
A. fats
B. sugar
C. water
D. sunlight
Please help it’s due today I will give Brainliest answer.
Answer:
B. sugar
Explanation:
During photosynthesis, plants make sugars that they use for energy and to make cellulose and starch.
I hope this helps!
Mixtures will not be represented by a_____
Answer:
symbol/chemical formula
Explanation:
Explain how the method of mark and recapture works to determine population size.
Answer:
A number of members of a population are capture, tagged, and released. At a later time, the sampler returns and captures a set number of members of the population and determines the ratio of tagged to untagged individuals. The ratio of tagged to caught individuals is then approximately equal to the ratio of originally tagged individuals to the total population.
edge 2021
The human genome is the basic genetic code, or blueprint, for the transfer of traits from parents to offspring through – . Studying this code – ways to partially correct genetic defects after birth. It is already clear that behavior is rarely controlled by – . Rather, almost all behavior involves – , and often specific – factors influence how genes are expressed.
Answer:
This question is incomplete
Explanation:
This question is incomplete because of the absence of options but the complete question is in the attached picture below.
The human genome is the basic genetic code, or blueprint, for the transfer of traits from parents to offspring through -hereditary transmission- . Studying this code -has revealed- ways to partially correct genetic defects after birth. It is already clear that behavior is rarely controlled by -a single gene- . Rather, almost all behavior involves -multiple genes- , and often specific -environmental- factors influence how genes are expressed.
It would be noted that some of the options were not chosen at all, this is because this question focuses on genes and it's expression. "Nurture and education" and "psychological" are not factors that actually affect gene expression. Also, studying genetic codes has already revealed partial ways to correct genetic defects and hence it would be wrong to choose "may in time reveal". For instance, there are procedures used to identify genetic defects in the spermatozoa of a male which can be screened out and the "good" sperm used to fertilize an egg in-vitro.
justify how birds belonging to different species might all share a common ancestor.
Answer:
When two different species having similar ancestors evolve to become different is called divergent evolution.
Birds belonging to different species might all share a common ancestor are also based on divergent evolution. Animals undergo divergent evolution for several reasons such as enviornmental changes and existance or absence of predators.
Some animals or birds adapt according to enviornmental changes for their survival and presence of predators affect the evolution of animals or birds to protect themselves from predators.
For example: Galapogas finches undergo divergent evolution in which they have same ancestors but radiates into different species such as medium ground finches, woodpecker finch, and mangrove finch.
A raccoon needs three fish a day to survive. A Fish needs 11 phytoplankton 1 point a day to survive. How much phytoplankton does a raccoon need to survive a day?
Answer:
33
Explanation:
if one fish needs 11, then you multiply 3 by 11, and that gives you 33.
Which organelles work together to get glucose into the cell for energy to be made?
A The cell wall lets the glucose into the cell. The glucose moves across the cytoplasm to the chloroplast so that energy can be
created
B The cell wall lets the glucose into the cell. The glucose moves across the cytoplasm to the mitochondria so that energy can be
created
DC The cell membrane lets the glucose into the cell. The glucose moves across the cytoplasm to the chloroplast so that energy can be
created
OD The cell membrane lets the glucose into the cell. The glucose moves across the cytoplasm to the mitochondria so that energy can
be created
Answer: The cell wall lets the glucose into the cell, the glucose then travels through the cytoplasm to the mitochondria to create energy
Explanation:
What factors should scientists consider when creating a plan to conserve the species?
Answer:
Educate your family about endangered species in your area.
Recycle and buy sustainable products.
Reduce your water consumption.
Reduce your personal footprint.
Do not buy plastic products.
Pressure your civil servants.
Volunteer your time to protect the wildlife in your area.
Explanation:
what is property Around a restaurant called
Answer:
I don't understand your question
The _________ is a large structure that directs the cell's activities.
(please help me)
Answer:
Nucleus
because it's the structure directs all of the cell's activities, including reproduction.
what’s the answer to this?
Type fast if you don’t mind thanks!!
Explain how the discoveries by Rosalind Franklin helped Watson and Crick build an accurate model of DNA
Explanation:
n 1952, Rosalind Franklin produced an image of DNA that suggested it contained two strands twisted in a double helix with a phosphate backbone and bases inside.Franklin calculated the diameter of DNA, the distance between strands and bases, the angle of the helix, and the number of bases per coil.Watson and Crick used this information to build and accurate model of DNA.
Answer:
here is the topic information
In 1952, Rosalind Franklin produced an image of DNA that suggested it contained two strands twisted in a double helix with a phosphate backbone and bases inside.
Franklin calculated the diameter of DNA, the distance between strands and bases, the angle of the helix, and the number of bases per coil.
Watson and Crick used this information to build and accurate model of DNA.
Explanation:
edg2020
On my test Pls Help
What is the difference between a hydrogen bond and a covalent bond?
A Covalent bonds are when atoms share electrons while hydrogen bonds have lost or stolen electrons
B Covalent bonds are between two ATOMS while hydrogen bonds are between two MOLECULES
C Hydrogen bonds are when atoms share electrons while covalent bonds have lost or stolen electrons
D Hydrogen bonds are between two ATOMS while covalent are between two MOLECULES
"You use your entire body weight worth of ATP for energy EACH day!"
How can this be true when you don't eat your body weight worth of food each day?
A Lysosomes digest the used up ATP so it can be reused continually
B ATP is "recycled" each use by using energy from food to attach a phosphate back on making ADP
C Fats and phospholipids use enzymes to turn ATP into ADP
D Energy from food is used to attach a "P" group back onto the ADP so it is usable again
What concept is demonstrated by the "lock and key" model?
A Membranes will "lock" up food/water until the right "key" allows it out
B That the shape or proteins and substrates is specific and essential to protein function
C How only certain information is "unlocked" in the nucleus
D The method by which ions are transported through the "door" of the membrane
Answer:
Explanation:
Bonds form when atoms share or transfer valence electrons. In a covalent bond, two atoms share one or more electrons. Water is a polar molecule. A hydrogen bond is a relatively weak bond between two oppositely partially charged sides of two or more molecules.
Which is one function of a protein molecule?
BRAINLIST OPPORTUNITY
where are you MOST likely to find infectious agents? Check ALL that apply!!
in saliva
in mucus
on a door handle
on a water fountain
on a gene
in sewage
in animal waste
Answer:
All
Explanation:
Answer:
A, B, C, D, F, G
**all except on a gene :)**
What is the purpose of Mitosis? *
A. To produce an egg and a sperm cell.
B. To produce a new organism (like bacteria).
C. To produce a new cell (NOT a new organism).
D. To differentiate.
Answer:
C.
Explanation: Mitosis is a process where a single cell divides into two identical daughter cells (cell division). During mitosis one cell? divides once to form two identical cells. The major purpose of mitosis is for growth and to replace worn out cells.
Hope this helps! Have a nice day!
Answer:
C. to produce a new cell
Explanation:
Mitosis consists in replicating the genetic material of a mother cell in order to make two identical daughter cells; this is a diploid process. In order to make an egg or sperm cell and eventually a new organism, the correct process would be meiosis, since it combines the DNA between two cells and it is an haploid process.
Which cross section best represents the valley shape where a rapidly flowing stream is cutting into the bedrock in a mountainous area
Answer:
D. The inverted triangle like
A population is growing at a rate of 2, 4, 8, 16, 32. Which type of growth does this describe?
Answer:
it is doubling
Explanation:
that is the answer
Answer:
x(2)
Explanation:
It's multiplying by 2
What process do cells use to release energy without oxygen? *
cellular respiration
O digestion
O fermentation
O photosynthesis
Photosynthesis is a process which uses light energy, convert it into chemical energy and uses it to release energy without oxygen. Therefore, option (D) is correct.
What is photosynthesis?Photosynthesis is a process that plants and other organisms utilize to transform the energy from light into chemical energy. This chemical energy can then be used to fuel the activities of the organism later on through a process called cellular respiration.
Plants absorb carbon dioxide (CO2) and water (H2O) from the air and soil during photosynthesis. Water is oxidized, meaning it loses electrons, while carbon dioxide is reduced, gaining electrons, within the plant cell. This converts water to oxygen and carbon dioxide to glucose.
Learn more about Photosynthesis, here:
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Define these words:
Activation energy
Catalyst
Enzymes
Substrate
Conservation of mass
Conservation of energy
Answer:
Activation Energy: the minimum quantity of energy which the reacting species must possess in order to undergo a specified reaction
Catalyst: A substance that increases the rate of a chemical reaction
Enzymes: a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
Substrate:
the surface or material on or from which an organism lives, grows, or obtains its nourishment.
Conservation of mass: a principle stating that mass cannot be created or destroyed.
Conservation of energy:
a principle stating that energy cannot be created or destroyed, but can be altered from one form to another.
What’s the answer so confused
Answer:
0
Explanation:
1/3 x 21 = 7
1/1 x 12 = 6
7 - 1 = 6
6 - 6 = 0
12. A student has a brand new pencil with a mass of 120g. One week later,
after sharpening it a few times, the pencil becomes shorter and it's mass is now
only 90g. Is this an example of a physical or chemical change?
Where is the other 30g of mass from the pencil? Be specific/give details.
Answer:
Water is a polar molecule because one area is ________________ and another area is ______________________.
Explanation:
21.5 grams of potassium Dichromate is dissolved in water to make 650.0 mL of solution. What is the concentration of the potassium ions in the above solution?
Answer:
30% concentration
Explanation:
:)
I will give all my points For who ever answers this
A ball rolls down a ramp. starting from rest. After 4.9 seconds, its velocity is
7 m/s. What is the acceleration of the ball?
Answer:
1.43 m/s/s
Explanation:
[tex]a= \frac{vf-vi}{t}[/tex]
vi=0m/s
Vf=7m/s
t=4.9
[tex]7/4.9=1.4285714285714284[/tex]
or 1.43 m/s/s
