Students studying potential and kinetic energy designed this experimental set-up. During the initial trial, a ball was rolled down a ramp fro the spot marked "start". The ball rolled down the ramp and then back up the other side, to the spot marked "finish", represented by letter B. The students want to determine the starting point so that the ball will rise up to the point marked by letter A. They release the ball starts at the spot marked "New start" and the ball rolls up the other side to letter A.


This is a controlled experiment. All BUT ONE factor is controlled in this experiment. What is that factor?


A. ball used in trials

B. distance between ramps

C. starting point of release

D. angles of incline for ramps ***


Can someone check this?

Answers

Answer 1

Answer:

The correct answer is D) angles of incline for the ramps

Explanation:

The only way the ball which rolled off Starting Point A will roll down an incline and then upwards to a finish point called B is if the angle of incline between A and the midpoint X (which is where the ball starts to roll back up) is steeper than the gradient between B and X.

The higher the gradient of the slope, the faster the acceleration of the ball towards point B from A and vice versa.

Cheers


Related Questions

How many net ATPs are made in glycolysis?
Select one:
O a. 1
O b. 2.
O c. 6
O d. 34
O e. 38

Answers

Answer:

O c. 6

Explanation:

Which action is a result of gravity in relation to moving tectonic plates

Answers

Answer:

Ridge push and slab pull is a result.  

Explanation:

Can I get brainiest!

Answer:

The answer is ridge push and slab pull

Explanation:

Please help
What do all of the biodiversity hotspots have in common?

Answers

Answer:

To qualify as a biodiversity hotpot, an area must meet two strict criteria: Contain at least 1,500 species of vascular plants found nowhere else on Earth (known as "endemic" species). Have lost at least 70 percent of its primary native vegetation.

Explanation:

Biodiversity hotspots are a method to identify those regions of the world where attention is needed to address biodiversity loss and to guide investments in conservation.

You are doing lab work with a new species of beetle. You have isolated lines that breed true for either blue shells and long antenna or green shells and short antenna. Crossing these lines yields F1 progeny with blue shells and long antenna. Crossing F1 progeny with beetles that have green shells and short antenna yields the following progeny: Phenotypes Number Blue shell, long antenna 82 Green shell, short antenna 78 Blue shell, short antenna 37 Green shell, long antenna 43 Total 240 Assuming that the genes are linked, what is the map distance between them in m.u.

Answers

Answer:

The map distance = 33.3 cM

Explanation:

Let us take,

BBLL  as blue shell, long antenna .........Parent 1

bbll  as green shell, short antenna .......... Parent 2

Then, cross between parent 1 and parent 2, which is

BBLL X bbll

The F1 generation will be heterzygous

BbLl as blue shell, long antenna ...... F1 offspring

By the test cross,

BbLl X bbll :

given,

BL/bl = 82 : Parental

bl/bl = 78 : Parental

Bl/bl = 37 : Recombinant

bL/bl = 43 : Recombinant

Total = 240

Recombination frequency =  {  [tex]\frac{Number of recombinants}{Total offspring}[/tex]}*100

= (80/240)*100 = 33.33 %

Thus, the map distance = 33.3 cM

Describe the relationship between the weight added and the force of gravity.

Answers

Answer:

D

Explanation:

The heavier somthing is than the gravatational pull is more heavy

need help with this ??

Answers

the answer is year
.....................

Answer:

Year

I took a test with a similar question recently

summer squash purchased at your local grocery store would be biologically classified as a

Answers

Answer:

considered a vegetable.

Explanation:

Drag each tile to the correct location. Not all labels will be used. Identify the phases in the life cycle of small and big stars. supernova: In this stage, the star collapses and produces elements heavier than iron. planetary nebula: In this stage, the star emits strong energy pulses that push away the outer layers creating a cloud of ionized gas around the core. neutron star: In this stage, the star has reduced to an extremely dense core. white dwarf: In this stage, the star has reduced to a dense core.

Answers

Answer:

large=  supergiant, supernova, then a neutron star

small= giant, planetary nebula, white dwarf

Explanation:

star life cycle changes by these phases

Which is the name of the group of spermatophytes that are cone-bearing plants?

A. Lycophytes
B. Bryophytes
C. Gymnosperms
D.angiosperms

Answers

Answer:

Gymnosperms

Explanation:

Gymnosperms produce both male and female cones, each making the gametes needed for fertilization; this makes them heterosporous. Megaspores made in cones develop into the female gametophytes inside the ovules of gymnosperms, while pollen grains develop from cones that produce microspores.

Gymnosperms are name of the group of spermatophytes that are cone-bearing plants. The correct option is C.

What are gymnosperms?

In contrast to angiosperms, or flowering plants, whose seeds are encapsulated by mature ovaries or fruits, a gymnosperm is any vascular plant that propagates through a bare seed, or ovule.

Many gymnosperm seeds are borne in cones and are not visible until the plant matures.

Gymnosperms are a small class of plants that rarely flower and produce "bare seeds." This means that the seeds are produced on the reproductive structure's surface rather than within it, as in a fruit.

Gymnosperms are a spermatophyte plant group that includes cone-bearing plants.

Thus, the correct option is C.

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Observations:
In this photo I can
observe...
(delete this and start
typing here. See below
for ideas about what to
write about)

Answers

Answer:

In this photo, one can observe the big mountains, the clear blue sky, the sand which covers the ground, the path down the middle and the variety of dry, green plants.

Explanation:

^

Which of the following statement is true:

Reptiles do not live very long.
Amphibians and reptiles are born similar in size.
Amphibian and reptiles are similar vertebrates.
Amphibians and reptiles eat identical organisms.

Answers

Answer:

C or D

Explanation:

Answer:

Amphibians and reptile are somewhat alike and they are not born the same size so I am leaning more towards c

Explanation:

Evaluate these statements about Koch's postulates, which are used to establish a causative link between a specific microbe and a specific disease. Which of them are true

Answers

Answer:

The following statements are true:

The microbe must be present in individuals suffering from the disease and absent from healthy individuals.

If organisms from the pure culture are injected into a healthy experimental animal, the disease symptoms should appear.

The microbe must be isolated and grown in pure culture.

Note: The question is incomplete. The complete question is given below:

Evaluate these statements about Koch's postulates, which are used to establish a causative link between a specific microbe and a specific disease. Which of them are true? Select all that apply.

The microbe must be present in individuals suffering from the disease and absent from healthy individuals.

The microbe does not have to be isolated from the experimental animal as long as the disease is present.

If organisms from the pure culture are injected into a healthy experimental animal, the disease symptoms should appear.

The microbe must be isolated and grown in pure culture.

Explanation:

Robert Koch, a German Physician, in 1884 postulated the following four criteria in order to establish a causative relationship between a microbe and a disease;

The microorganism must be found in abundance in all organisms suffering from the disease, but should not be found in healthy organisms. The microorganism must be isolated from a diseased organism and grown in pure culture. The cultured microorganism should cause disease when introduced into a healthy organism. The microorganism must be reisolated from the inoculated, diseased experimental host and identified as being identical to the original specific causative agent.

From the above, the following out of the statements are true:

The microbe must be present in individuals suffering from the disease and absent from healthy individuals.

If organisms from the pure culture are injected into a healthy experimental animal, the disease symptoms should appear.

The microbe must be isolated and grown in pure culture.




Fill in the blanks with either P for prokaryote, E for eukaryote, or B for both. (2 points per correct answer) – 20 possible points


1. _____ I have a cell membrane.

2. _____ I have a nucleus.

3. _____ Bacteria are an example of me.

4. _____ Animals are an example of me.

5. _____ I contain ribosomes.

6. _____ I contain cytoplasm.

7. _____ I contain genetic material, such as DNA.

8. _____ I contain membrane-bound organelles.

9. _____ Plants are an example of me.

10. _____ Your body cells are made of me.


Please I need help!!

Answers

Answer:

1. B

2. E

3. P

4. E

5. B

6. B

7. B

8. E

9. E

10. E

Explanation:

1. Both prokaryotes and eukaryotes have a cell membrane. Hence, it is B

2. Only eukaryotes have a nucleus. Hence, it is E

3. Bacteria are an example of prokaryotes because they lack a membrane-bound nucleus. Hence, P

4. Animals are an example of eukaryotes because they possess a membrane-bound nucleus. Hence, E

5. Both prokaryotic and eukaryotic cells contain ribosomes. Hence, B.

6. Both prokaryotes and eukaryotes contain cytoplasm. Hence, B.

7. Both prokaryotes and eukaryotes contain genetic material, such as DNA. Hence, B

8. Only eukaryotes contain membrane-bound organelles e.g mitochondrion, endoplasmic reticulum. Hence, E.

9. Plants are an example of eukaryotes because they possess a membrane-bound nucleus. Hence, E.

10. My body cells as a human being are made of eukaryotic cells. Hence, E.

Outermost solid layer of earth A:crust. B:mantle. C:outer core. D;inner core

Answers

Answer: crust

Explanation: The crust is the most outer layer sold layer of planet Earth. We live on the crust of the Earth. Therefore, crust is the answer.

Hope this helps!

Which Macromolecule forms peptide bonds?

Answers

Proteins help form peptide bonds

Bile_____?
A: is stored in the pancreas
B: helps break down fats
C: helps break down proteins
D: is released through the small intestine
Please do not answer if you do not know, or if you are not 100% sure. Thank you.

Answers

Answer:

B: helps break down fats

Explanation:

Help Please ATP Synthase​

Answers

Answer:

its the 3 one

Explanation:

H pass through the ATP NUMBER 3

Question 1
The heat from a lamp allows a lizard to remain warm. This is an
example of which type of heat transfer?
Cold Blood
Conduction
Radiation
Convection

Answers

It definitely Radiation for the answer I think

Answer:

Answer is radiation

Explanation:

Took the test!

There are some specific ethical guidelines and standards for the forensic scientists to follow. But it was not always so. Investigate how the standards and ethics code came to be established over the years. Also, discuss whether they have helped as much as they should have.

Answers

Answer:

Explanation:

The field of forensic science is important to the criminal justice system. Forensic personnel must pay close attention to detail during the collection, preservation, and analysis of physical evidence. If evidence is mishandled, manipulated, or misinterpreted it can potentially destroy a case and/or the lives of all individuals involved

Answer:

Explanation:

In 1904, Scotland Yard officials introduced fingerprint matching to US law enforcement officials at the World’s Fair. The fact that forensic science was not born from the scientific community meant that forensic scientists were not always bound to the quest for knowledge, but instead for the purpose of solving crimes. This difference led to misaligned incentives. Expert witnesses were often paid per conviction in many states.

In the late 1980s, DNA evidence, which was born in the scientific community, has helped identify the guilty and exonerate the innocent. Many other forensic techniques, such as hair microscopy, ballistics analysis, and arson investigations, have not been subjected to the rigorous scientific evaluation that DNA analysis has. Other techniques, such as blood typing, have been properly validated.

These invalidated techniques have led to the Innocence Project, which holds that forensic science techniques should be shown to be valid and reliable through research and assessment of validity and reliability, and subject to accreditation and certification to assure quality. States are eligible to receive grant money if they do so. This change has resulted in the growth of many organizations, such as the ASCLD/LAB, that accredit forensic scientists.

the growth of plants due to gravity

Answers

Answer:

Gravitropism (also known as geotropism) is a coordinated process of differential growth by a plant or fungus in response to gravity pulling on it. Gravity can be either "artificial gravity" or natural gravity. It is a general feature of all higher and many lower plants as well as other organisms.

Explanation:

What is the relationship between DNA, genes, and proteins in the cell?

Answers

Answer:

Explanation:

protein synthesis

Which two characteristics do polar and dry climates have in common?
high altitude and very cold winters
very cold winters and contrasting seasons
contrasting seasons and very little precipitation
very little precipitation and few, specialized plants

Answers

Answer:

D. very little precipitation and few, specialized plants

Explanation:

its the answer on edge

The two characteristics which polar and dry climates have in common include very little precipitation and few specialized plants. Thus, the correct option is D.

What are Polar and Dry climates?

A polar climate is a place where the climate generally has a temperature below the freezing, icy, and it is covered in snow. These areas do not get enough amount of direct heat and sunlight from the sun. Polar climates are located at the North Pole of the Arctic, and at the South Pole on the continent of Antarctica.

The dry climate are found in deserts which are very dry and the temperature of these areas are very high.

Both of these climates show some common characteristics such as very little precipitation and few specialized plants which can survive in these conditions.

Therefore, the correct option is D.

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What type of scientist is most likely to study to cooling of lava after a volcanic eruption

Answers

Geologist, they study rocks which are formed by cool lava


Which of the following animals is successful because it moves quickly, reproduces rapidly, and has a waterproof external skeleton?
A. Ant
B. mouse
C. Bird
D. Squirrel

Answers

ant hope this helped!!

What happened to the indigenous“medicine man” after Dr. Campbell showed up and why?

Answers

Answer:

The indigenous 'medicine man' flees seeing Dr. Campbell because both Dr Campbell and the medicine man, were in conflict with each other.

Explanation:

'Medicine Man' is a movie directed by John McTiernan, starring Sean Connery(as Dr. Robert Campbell) and Lorraine Bracco(as Dr. Rae Crane). The film is about Dr. Campbell who sets into the forest of Amazon and finds the cure to cancer.

The Medicine man is the one who informed Dr. Campbell about the flowers containing 'ju-ju' (powers to heal). But after Campbell cured a little boy having gas by 'alka-seltzer', they both were in conflict of each other.

So, when Dr. Campbell showed up with the man and a little boy suffering from malignant neoplasms at the medicine man doorsteps, the indigenous medicine man flees from there.

Activator or repressor proteins which bind DNA to regulate the transcription of genes do so mainly by: A. Covalent interactions between the protein and specific bases in the major groove of DNA B. Covalent interactions of Zn2 atoms with the phosphodiester backbone C. Non-covalent interactions between the protein and specific bases in the major groove of DNA D. Covalent interactions with nearby nucleosomes E. Answers B and D are correct

Answers

Answer:

C. Non-covalent interactions between the protein and specific bases in the major groove of DNA

Explanation:

Activator or repressor proteins are proteins with specific DNA-binding domains that have affinity by one or two DNA strands. In general, these proteins interact with the major groove of the B-DNA structure since this structure exposes more functional groups for binding. Non-covalent interactions are a type of interaction that does not involve the sharing of electrons. The interaction between proteins and DNA is due to the combination of different non-covalent interactions, which can be classified into four major types: van der Waals, hydrophobic, hydrogen and ionic interactions.

need help with this ??

Answers

C...........

Explanation:


According to ______
electrons are added one sublevel at a time.

Answers

Answer:

Two electrons are added to one sublevel at a time (Hund's Principle)

identify and describe one natural and one man made source of carbon in the carbon cycle?

Answers

Greenhouse effect is the answer

Countries like Guatemala and
are learning responsible and sustainable farming practices to help their agricultural business flourish.

south africa

rwanda

france​

Answers

Answer:

The answer is Rwanda

Explanation:I took the unit test.

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