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.

Answers

Answer 1

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.


Related Questions

Diabetes is often suspected when glucose shows up in urine tests. Use the model to explain how glucose could be present in urine. Why do you think this symptom is especially concerning for young people?

Answers

Answer:

S.A for Edmentum and Plato

Like and Rate

In step 1, blood goes to the kidney for filtration. If excess sugar exists in the blood, the filtered substances will have more sugar than they do in a person who doesn’t have diabetes. In step 2, there is some reabsorption of sugar. But if there’s an unusually high amount to filter, some sugar will stay in the urine as it passes through the renal tubule to be excreted by the body. This symptom is concerning because it could stress the kidney, which could lead to kidney problems at a young age.

how did wegner use climate evidence to support his hypothesis​

Answers

Explanation:

Wegener used evidence of climate change to support his hypothesis. As a continent moves toward the equator, its climate becomes warmer. As a continent moves toward the poles, its climate becomes colder. But the continent carries with it the fossils and rocks that formed at its previous locations.

Are eukaryotes multicellular or unicellular or both?

Answers

The answer is actually Both

Can anyone help me with any of these questions? Please

Answers

Answer:

peanut butter - reduces risk of heart disease and lowers cholesterol

egg - protein; cell repair and growth

A relationship between living things that depend on the same
resources at the same place and at the same time is called

Answers

Answer:

competition

Explanation:

i searched it up

Answer:

Competition

Explanation:

Competition is a relationship between living things that depend on the same resources. The resources may be food, water, or anything else they both need. Competition occurs whenever the two species try to get the same resources in the same place and at the same time.

Which of the following is not a characteristic of enzymes?
F
they are proteins
G
they act as a catalyst
H
they react with a specific substrate
they are unaffected by changes in temperature
J
they are unaffected by changes in temperature

Answers

Answer:

they are unaffected by changes in temperature. t

Explanation:

that's the answer J. u kinda wrote it in two places.

What does the term frameshift mean in science

Answers

Answer:

A frameshift mutation is a type of mutation involving the insertion or deletion of a nucleotide in which the number of deleted base pairs is not divisible by three.

Explanation:

Answer:

A frameshift mutation is a genetic mutation caused by a deletion or insertion in a DNA sequence that shifts the way the sequence is read. A DNA sequence is a chain of many smaller molecules called nucleotides.

HOPE IT WILL HELP U!


A student wondered it butterflies would show any differences in their wing color it, as caterpillars, they were grown in the dark or grown in bright white light
Which statement would be a possible hypothesis for an experiment to test this idea?

Answers

Answer:

probably bc most caterpillars are mostly green and then they turn in to like brown or other colors

Explanation:

What question could you ask about the bones?

Answers

Answer:

How deep were the skulls buried?

Which is not an example of a "living" life process?
A)Sensitivity
B)Resting
C)Growth
D)Nutrition

Answers

Answer:

Nutrition

Explanation:

--------------------

the answer is D please mark me brainliest

Your task is to decide which dig site is most likely to produce Dimetrodon fossils. What kinds of information do you think would be most useful for making your decision?

Answers

To uncover Dimetrodon fossils, researchers must first research the dimetrodon's habitats, then go to modern-day replicas of those past ecosystems.

Dimetrodon fossils:

Because its remains have been discovered in Texas and Oklahoma in the United States, Nova Scotia, Canada, and all throughout Europe, the Dimetrodon is likely to have been well suited to a broad range of environments.

The first fossil was discovered in the nineteenth century, and Edward Drinker Cope named it in 1878.

Find out more information about 'Fossils'.

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2 questions

10. During cell division, the genetic material in a cell needs to duplicate - before
it divides into 2. *
True
Or
False


11. Chromosomes (genetic material) are located outside of the nucleus of the
cell. *
True
ОR
False

Answers

Answer:

10: True

11: Eukaryotic chromosomes and Linear chromosomes are located in the nucleus.. Not outside. So, I think false. But you can pick

BRAINLIST OPPORTUNITY



Which type of infectious agent causes athlete's foot?
O a virus
O a bacterium
O a fungus
O a parasite

Answers

the answer is c. a fungus

Answer:c

Explanation:

What happens to an atom if it gains an electron? *
A.It becomes negative
B.It becomes neutral
C.It becomes positive
D.None of the above

Answers

Answer:

It became negative

Explanation:

How many different ELEMENTS are in Na2SO4?
A.)1
B.)3
C.)6
D.)7

Answers

Answer:

D, 7

Explanation:

In one molecule of sodium sulfate, or Na2 SO4, there are seven atoms in all. The chemical formula for this molecule tells us this.

Identify the process in which the cell strives to maintain dynamic equilibrium:
homeostasis
turgor pressure
cytolysis
plasmolysis

Answers

Answer:

homeostasis

Explanation:

Homeostasis refers to the ability of the cell to keep a constant and stable environment. This includes chemical, physical, and biological components.

Cells need to regulate their environment despite the conditions outside of the cell. They need to be able to quickly adapt to changes to avoid harm to the cell.  

Pleaseeee help!!! This is due today!!

Write one page that tells me about your biome (Shrublands).

The pic is stuff I know already.

Answers

Some of the animals are blacktail deer, rabbits, foxes, coyotes, snakes and lizards, and all kinds of birds.

What are cat and dog paws adapted for?

Answers

Answer:

Explanation:

The cat and dog paws are adapted for walking, running, climbing and digging. Both the animals can use their front paws and back paws for different needs or just as the situation ahead of the demands.

HELP PLEASE! fill in the blanks

Answers

Answer:

infectious agents/germs, immune system, circulatory system

Explanation:

Choose all that apply. Carbohydrates contain the following elements:

Answers

Answer: carbon, hydrogen, and oxygen

Explanation:

hydrated carbon which results to sugar and oxygen

Explanation:

plz give me brainiest

Why does DNA need to be extracted from a cell before it can be analyzed?

Answers

Answer:

to study the genetic causes of disease and for the development of diagnostics and drugs.

Explanation:

It is important to extract DNA from a cell in order to study the genetic causes of disease and for the development of diagnostic and drugs. Scientists will use a cell culture system, which is cells from an organism that have either been made to continuously proliferate (grow) or are cancerous in nature (from cancer).

These cells allow us to continue working on experiments where we can change the conditions to determine various cell functions.

Please help!! I have to label the organelles in this cell plant!

Answers

1) mitochondria
2)nucleus
3)vacuole
4)chloroplast
5) cell wall

What is produced when an atom loses an electron?

Answers

Answer:

It becomes a positively charged ion.

Explanation:

Answer:

it will lose negative charge and become positively charged

is flour + water a colloid or solution?

Answers

Answer:

I belive it is a solution

Explanation: Hope this helped :D :3

Answer: ✅

Solution

Explanation: ✅

An example of a simple suspension would be flour in water, or sand in water. A colloid is a type of mixture intermediate between a homogeneous mixture (also called a solution) and a heterogeneous mixture with properties also intermediate between the two.

IamSugarBee

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

Answers

Answer:

All

Explanation:

Answer:

A, B, C, D, F, G

**all except on a gene :)**

7. Why is the property of specific heat important to aquatic life?​

Answers

Answer:

Specific heat means amount of heat required to raise a temperature of a particular body, in case of aquatic life the specific heat plays an important role, the organisms living in an aquatic system require an certain body temperature to be maintained in order to survive.

Specific Heat raises the temperature of the water body resulting in Aquatic life to survive.

Which of the following abiotic factors can influence the number of plants that can grow in an ecosystem?

Answers

Answer: The most important abiotic factors for plants are light, carbon dioxide, water, temperature, nutrients, and salinity.

Which event or principle CANNOT have its validity directly tested by laboratory experiment?
Select one:

a. the big bang theory

b. the conservation of energy

c. the periodicity of element properties

d. the acceleration of objects due to gravity

Answers

 because the Big Bang theory has to do with space and earth

In a woodland ecosystem, the number of species of microorganisms in the soil that do not
harm plants increases. How does this rise in biodiversity affect the sustainability of the
ecosystem?
A The rise in biodiversity makes the ecosystem less sustainable.
B The rise in biodiversity makes the ecosystem more sustainable.
C The rise in biodiversity does not change the sustainability of the ecosystem.
D The rise in biodiversity makes the ecosystem only temporarily less sustainable.

Answers

Answer:

I think it’s B

Explanation:

Veteran trees are home to a variety of invertebrate species because a woodland's diversity is essential (insects, spiders, millipedes, centipedes, etc.), Thus, option B is correct.

What is the rise in biodiversity in woodland ecosystem?

In addition to lichens and fungi. Mature forests also favor bats among other species. Biodiversity in the woodland is a result of structural diversity.

Stability increases with biodiversity in ecosystems, species, and people. For instance, species with numerous populations that are adapted to a wide range of conditions and high genetic diversity are more likely to be able to withstand disturbances, disease, and climate change.

Generally speaking, expanding the variety of habitats or vegetation structures present at a site can be done to increase biodiversity.

Therefore, The rise in biodiversity makes the ecosystem more sustainable.

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Which of the following represents the phases of mitosis in their proper sequence?

Answers

Answer:

Mitosis consists of four basic phases: prophase, metaphase, anaphase, and telophase. Some textbooks list five, breaking prophase into an early phase (called prophase) and a late phase (called prometaphase).

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