A group of students is investigating whether the smoothness of a surface affects the force of friction. Each student pushes a book on two different surfaces. One surface is ice and the other is concrete. The distance traveled by the book on each surface is shown.
Experimental Observations
Student 1 Student 2 Student 3 Student 4
Distance traveled by book on ice 23 cm 21 cm 24 cm 22 cm
Distance traveled by book on concrete 15 cm 18 cm 16 cm 17 cm
Based on the table, which conclusion is correct about the average distance traveled?
A. It is less on concrete.
B.It is greater on concrete.
C.It is less when the book is pushed harder.
D. It is independent of the type of surface.
Answer:
The answer is D
Explanation:
I took the quiz:)
Hyperopia occurs because the eyeball is too ____________, causing images to be focused behind the retina.
PLEASE HURRY! WILL GIVE BRAINLIEST!
Answer:
Hyperopia occurs when the image formed by the focusing mechanism of the eye is “behind” the retina. This often occurs if an eye is shorter than average.
Explanation:
Hyperopia happens when a persons eye is smaller than others, when this happens a person would likely need glasses
Answer:
short
Explanation:
what are the independent and dependant variables in Plate Tectonics Lab Report?
Answer:
Independent= amount of years.
Dependent= geologic events
Explanation:
HaLp PlEsSsS
Write a paragraph of five sentences or more explaining how the radio uses the behavior and characteristics of the radio wave to function.
You must include citations for all reliable sources used. Include citations from three or more reliable sources.
Answer:
hey! answer below:
Paragraph:
The radio uses the behavior and characteristics of the radio wave to function because there is... I don't have the time to write a paragraph of five sentences or more explaining how the radio uses the behavior and characteristics of the radio wave to function. I am supposed to be doing math but instead, I am doing this. Please don't get mad! I have a 97 in ELA and a 104 in engineering, I hope you care. I just wanna get these points bro.
What is most likely to occur during a chemical reaction
Answer/Explanation:
In a chemical reaction, the atoms and molecules produced by the reaction are called products. ... No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.
This question involves the concepts of a chemical reaction, conservation of mass, chemical bonds.
During a chemical reaction, the phenomenon that is most likely to occur from the given phenomena is "Mass is conserved".
Whenever a chemical reaction occurs old bonds between the elements are broken and new bonds are formed amongst different elements. Hence, the properties of the original substances are changed due to the formation of new bonds, and new molecules as a result.
Original molecules or substances are lost due to formation of the new ones.
No new atoms are created or destroyed in a chemical reaction. The atoms just rearrange themselves to form new molecules or substances only.
Since no atoms are created or destroyed during a chemical reaction. Hence the law of conservation of mass is applicable to a chemical reaction. This means the mass is conserved during a chemical reaction.
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The attached picture shows different types of chemical reactions.
The blue mass in the image is 10kg.
The red mass in the image is 10kg.
The blue mass is currently 4 meters away from the red mass.
If we change each mass to 20kg, what will happen to the gravitational force each mass puts on the other?? You have to pick a answer through A,B,C! The force of gravity will increase as the masses increase.
The force of gravity will not change as the masses increase.
The force of gravity will decrease as the masses increase.
PLEASE HELP! 20 POINTS!
Amy and Chris took different routes to travel from Point A to Point E. Amy took the route along A, B, C, D, and E and reached the destination in 2 hours. Chris took the route along A, G, F, and E and reached the destination in 3 hours. Their routes are shown.
Which conclusion is correct?
Amy's average speed is twice Chris's average speed.
Chris's average speed is twice Amy's average speed.
Amy's average speed is equal to Chris's average speed.
Chris's average speed is three times Amy's average speed.
Answer:
Amy's average speed is equal to Chris's average speed
Answer:
im pretty sure its 'a'
Explanation:
Amy took 1 more point than Chris and reached their destination in 2 Hrs. when Chris took less and reached the destination in 3 Hrs.
see picture for visual explanation:
PLEASE HELP IF U PASS TESTS
if the same amount of heat is added to 25.0g samples of each of the metals in the chart, which metal will experience the largest temperature change?
a. calcium
b. iron
c.silver
d.gold
Gold metal will experience the largest temperature change.
Explanation:
Given:
Four different metals of 25.0 gram in which the same amount of heat was added.
To find:
Which metal will experience the largest temperature change.
Solution
Consider heat added to all metals be Q and the mass of every metal is 25 grams. This means the value of temperature change will be dependent on value specific heat of metals.
The change in temperature of the substance when heat is supplied to the substance is given by:
[tex]Q=m\times c\times \Delta T\\\Delta T=\frac{Q}{mc}\\\Delta T\propto \frac{1}{c}....[1][/tex]
The above relation means that change in temperature is inversely proportional to the specific heat of the metal.
The specific heat of calcium =[tex]c_{Ca}=0.647 J/g^oC[/tex]
The specific heat of iron = [tex]c_{Fe}=0.449 J/g^oC[/tex]
The specific heat of silver = [tex]c_{Ag}=0.235 J/g^oC[/tex]
The specific heat of gold =[tex]c_{Au}=0.129 J/g^oC[/tex]
[tex]c_{Au}<c_{Ag}<c_{Fe}<c_{Ca}[/tex]
So, out of these metals, gold has the lowest value of specific heat and according to relation (1), the temperature change will be largest in 25.0 grams of gold and will be least in calcium.
The order of change in temperature of the metals will be:
[tex]\Delta T_{Au}>\Delta T_{Ag}>\Delta T_{Fe}>\Delta T_{Ca}[/tex]
Gold metal will experience the largest temperature change.
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HELP FAST CORRECT ANSWERS ONLY
Why is the dust tail of the comet curved instead of straight?
A.
the ions move at a much slower speed than ions of the ion tail.
B.
The ions move at a much faster speed than ions of the ion tail.
C.
The gravitational pull of Jupiter causes the curve.
D.
The gravitational pull of Earth causes the curve.
What are some of the landforms rovers have found on Mars that show it was once an active place?
Answer:
The Curiosity rover found that ancient Mars had the right chemistry to support living microbes. Curiosity found sulfur, nitrogen, oxygen, phosphorus and carbon-- key ingredients necessary for life--in the powder sample drilled from the "Sheepbed" mudstone in Yellowknife Bay.
Explanation:
Hope it helped
Answer:
,
Explanation:
Where in the eye are rods and cones located?
cornea
retina
lens
iris
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Answer:
By the Retina
Explanation:
I like your profile pic
Answer: retina
Explanation: They are located in the retina (a layer at the back of the eye).
IF YOU GET GOOD GRADES ON SCIENCE TESTS PLEASE HELP ME!!!!!
The student develop the model above ( its really below) . usually the model, identify two potential wave phenomena that occur and are the reason behind why the student can only hear the train in front of the apartment complex.
A. the train can be heard more easily in front of the apartment complex because of reflection and interference. as the sound comes from train, the sound waves reflect off of the complex and interfere with each other increasing amplitude of the wave to make it easier.
B.the train can not be heard ad easily in the park because of reflection and diffraction. the sound reflects off of the trees in the park and diffract between the tree, this causes the waves to bend too much to be heard.
C.the train can be heard more easily in front of the apartment complex because of diffraction and refraction. the sound waves diffract between the other buildings aiming them towards the apartment complex and then the sound refracts through the apartment complex which makes it more difficult to hear in the park.
D.the train can not be heard as easily in the park because of interference and reflection. the other buildings in front of the park cause interference of the sound waves from the train and the trees in the park cause reflection making it too hard to hear the train.
(please be 100% sure about your answer)
Answer:
A i think hope this helps
Explanation:
Answer:
A
Explanation:
The sound wave hits the apartment complex first.
im sure this is physics and not science
If engine A has more power than engine B, what does one know for sure?
Engine A is able to move a car further.
Engine B can do more work in less time.
Engine A is able to accelerate a car faster.
Engine B gets better gas mileage.
Answer:
This has a better power than engine B , you will find this engine better for in gear acceleration and overtaking manuevers also this engine will allow a higher top speed.
Explanation:
Can someone help me please? thanks
Answer:
C or 3rd option
Explanation
The downward force of gravity and the upward force of air resistance on a ball are both 5N. What is the ball's acceleration?
Group of answer choices
-5 m/s
5 m/s
10 m/s
0
Answer:
0
Explanation:
I believe they both cancel each other out, I might be wrong though
Can someone help me
Which of the following would a good frame of reference?
A) the moon
B) a tree
C) a rabbit
D) your sister while she rides her bike
Use the chemical reaction to answer the question.
Answer:
60 grams
Explanation:
Rahul sees a flock of birds. He watches as the flying birds land in neat little rows on several power lines. Which change of state does the motion of the birds most closely model?
melting
vaporization
deposition
sublimation
Answer:
C.) Deposition.
Explanation:
I just took the unit test
The change of state that Rahul sees and models the motion (movement) of the birds is called deposition.
What is deposition?In physics, deposition can be defined as a transition phase from a gaseous state to a solid without the need to pass to a liquid state.
The physical phenomena of deposition are relatively common in nature and they include many natural processes.In conclusion, the change of state that Rahul sees and models the motion (movement) of the birds is called deposition.
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( please just tell me the formula to use to solve it ) A hockey puck has a coefficient of kinetic friction of μk = .10. If the puck feels a normal force (FN) of 5 N, what is the frictional force that acts on the puck?
The frictional force that acts on the puck is 0.5 N.
The given parameters;
coefficient of kinetic friction, μk = 0.1normal force of the puck, Fₙ = 5 NThe frictional force that acts on the puck is determined by taking the product of the normal force and the coefficient of kinetic friction.
The frictional force that acts on the puck is calculated as follows;
[tex]F_k = \mu_k F_n[/tex]
Substitute the given parameters in the above equation and solve the frictional force.
[tex]F_k = 0.1 \times 5\\\\F_k = 0.5 \ N[/tex]
Thus, the frictional force that acts on the puck is 0.5 N.
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PLEASE HELP!!!!! Thalia is drafting a plan to move a large, perfect sphere concrete sculpture that is in front of her office building. Describe the considerations Thalia would need to make if she was drafting a plan to move the sculpture.
Answer:she should consider the time on how long it would take to move it and where she will move it
Explanation:
hope this helps
How does the agricultural activity most likely affect the surface water of the area?
Answer:
Agriculture has been the cause of significant modification of landscapes throughout the world. Tillage of land changes the infiltration and runoff characteristics of the land surface, which affects recharge to ground water, delivery of water and sediment to surface-water bodies, and evapotranspiration.
Explanation:
HELP EXPERT I NEED HELP
Q3. A bridge is built without expansion gaps.
Explain what could happen to the bridge if the temperature became:
a) much hotter than the day it was built.
b) much colder than the day it was built.
Explain it please
A bridge is built without expansion gaps will expand if the temperature became much hotter than the day it was built.
A bridge is built without expansion gaps will contract if the temperature became much colder than the day it was built.
What is thermal expansion?The expansion of any material due to the variation of the temperature is known as thermal expansion. It varied differently for different materials according to their corresponding values of the coefficient of the thermal expansion.
A bridge is built without expansion gaps will expand if the temperature became much hotter than the day it was built and it will contract if the temperature became much colder than the day it was built.
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Follow these steps to compare pieces of sticky tape that have the same charge:
Tear off two pieces of clear sticky tape that are about 15 cm (6 inches) long. Stick the two pieces of tape side by side on the tabletop.
Tear off two more pieces of tape, and fold under a half inch of each piece as shown in the side view. This tab makes them easy to pull off later on. Stick these pieces of tape onto the pieces already on the table and smooth them down.
tape folded to create a tab
Using both hands, grab the tabs of the two top pieces of tape. Carefully pull both top pieces of tape off the bottom pieces. Turn the non-sticky sides of the tape toward each other.
What do you observe? If there’s an interaction, explain whether the tape pieces attract or repel each other.
Answer:
they would atrract because they are sticky but when you take it off it would ware off
Explanation: I have used tape before and when you stick something to it then take it off it wares off
Two pieces of sticky tape with the same charge are formed when the non-sticky sides of the tape remain facing each other, it is observed that there is an interaction between the two pieces of tape, but the attraction and repulsion depend upon their charges.
What is the significance of attraction and repulsion?If the two pieces of tape have the same charge, they will repel each other, and as a result, the pieces of tape will move away from each other and if the two pieces of tape have opposite charges, they will attract each other, and as a result, the pieces of tape will move towards each other. The electric fields that are created by each piece of tape attract each other if they have differing in charges.
Hence, interaction between the two pieces of nonstick tape is observed, and the attraction and repulsion depend upon their charges.
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