You have a board, wood blocks, and a toy car. Your goal is to build a ramp that sends the car as far across the floor as possible. What angle between the board and floor would be best? Explain your answer
Answers
Answer:
The board should be placed at about an 80-88 degrees angle.Explanation:
This will speed the car up and increase its speed as going down the ramp.
Potential and Kinetic Energy
Set up a basic ramp against a chair, on top of some books, or from a table to the floor. Hold the car at the top of the ramp, and release to demonstrate the two main kinds of energy. Potential energy is placed into the car when it's lifted from the floor, and that energy is released as the car rolls down the ramp. Ramps should be made of a solid, smooth and rigid material such as wood or plywood.
Friction
Using the ramp from earlier, you can make a more interesting experiment by placing some things at the bottom. Drop the car from the top of the ramp again, and measure how far it rolls this time. Now, place a sheet of cardstock at the bottom of the ramp, and let the car roll over that. Measure the distance it rolls. Place some sandpaper on top of the card stock, release the car, and measure that distance. Finally, try it with some carpet at the bottom. You've now learned something about friction: the card stock has a lot less friction than the carpet, so the car should be able to roll farther.
Inertia
Place a heavy stack of books a few feet from the end of the ramp, so that the car hits those books when it rolls from the top down. Demonstrate that once or twice, and then take a small ball of clay or putty. Place it on top of the car and pat it down slightly; don't squish it onto the car, but press it just enough so that it won't roll off. Roll the car down the ramp, and when it hits the books, the clay should fly off the front of the car. This happens because of Newton's first law of motion: anything moving is going to want to keep moving (until it crashes into a wall).
Angle
The optimal angle for the board is about 80⁰
Related Questions
please solve this for me
Answers
The standard reduction potential for the half-reaction of Be^2+ + 2e^- -> Be is given as E^0 = 3.83 V.
For the half-cell Hg^2+ | Hg, the standard reduction potential is not provided in the given information. To calculate the electric potential for the voltaic cell, we need the reduction potential for the Hg^2+ | Hg half-cell.
A voltaic cell, also known as a galvanic cell or an electrochemical cell, is an electrochemical device that generates electrical energy through a spontaneous chemical reaction. It consists of two half-cells connected by an external circuit and a salt bridge or porous barrier that allows the flow of ions between the two half-cells.
Each half-cell consists of an electrode immersed in an electrolyte solution. The electrode is typically made of a metal or a conductive material, and the electrolyte is a solution containing ions that can participate in the redox (reduction-oxidation) reaction.
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Answer:
The standard reduction potential for the half-reaction of Be^2+ + 2e^- -> Be is given as E^0 = 3.83 V.For the half-cell Hg^2+ | Hg, the standard reduction potential is not provided in the given information. To calculate the electric potential for the voltaic cell, we need the reduction potential for the Hg^2+ | Hg half-cell.
Independent practice 6.GM.4.1. This maybe to random of a question but I need help please! It's about transformation, reflection, and rotation. If you are a teacher or anyone please help I'm struggling on this! (and I know this is not chemistry I had to choose one.)
Answers
Hey love! So I believe you’re asking if it’s transformation, reflection, or rotation. In this problem, it would be reflection! I can attach a visual example if needed, but imagine you’re flipping the shape like a pancake- first down, and then to the right. It should line up with the shape on the bottom. Does that make sense? I can find a different way to explain it if needed ! ^^
Please help me por favor :'(
Answers
Which statement BEST explains whether or not matter is conserved in this chemical reaction?
Answers
Answer:
D:Matter is not being conserved because there are 11 units in the reactants, one C8H8 and 10 O2, and 12 units in the products, eight CO2 and four H2O, so there is also more mass in the products that in the reactants.
Explanation:
searched up
Order the terms according to the path followed by oxygen during cellular respiration.
Answers
The respiration which is seen in plants and higher animals including humans take place in the presence of oxygen.
What is respiration?The process in which the cells of an organism obtain energy by the combination of oxygen and glucose and results in the release of carbon dioxide, water and ATP (energy) is defined as the respiration.
In respiration, the transfer of oxygen occurs from outside environment to cells within the tissues. It is a biological reaction which takes place inside the cells of living organisms. The energy molecule ATP ( Adenosine triphosphate) is created during this process.
The ATP molecule produced here by the breakdown of glucose is utilized by the cells to perform various activities. The first step in cellular respiration is glycolysis which occurs in cytoplasm.
The correct path of oxygen transfer is:
Nostrils → Nasal cavity → Pharynx → Trachea → Bronchi → Bronchiole → Alveoli
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List 2 evidences for climate change.
This is 6th grade science. Amplify.
Answers
Answer:
Global Tempurature is rising
Sea level is rising
Explanation:
This is evidence of climate change. Depending on where you live it could be different like in florida there was a drought.
1. our sea level is rising my a lot
2. our global temperature has changed a lot over the years as well.
help me with these questions pls thanks :)
Answers
Answer:
1. 2 valence electrons 2. 1 valence electron
Explanation:
valence shell is the elctrons present on the outer most shell
2. 1 valence electron
3. 8 valence electrons
Valence electrons are the ones on the very outside ring. Hope this helps!
HELP ASAP!! An experiment is performed in which a crystalline substance is added to a beaker filled with room-temperature water. The following observations were made:
1. The crystals dissolve.
2. A precipitate forms.
3. The bottom of the beaker feels warm to the touch.
4. Bubbles begin to form in the water.
Which observations are evidence that a chemical reaction took place?
Answers
Answer:
observations (2), (3), and (4) provide strong evidence that a chemical reaction occurred.
Explanation:
Observations (2), (3), and (4) are evidence of a chemical reaction because a precipitate formed, energy was released (the bottom of the beaker felt warm), and bubbles were formed in the water. Observation (1) indicates a physical change, not a chemical reaction.
Now, demonstrate a net force of 300 N to the right. How many ways can you do it?
Answers
Answer:
I've chose 5 ways to get there.
PLEASE HELP ME! THIS IS DUE TODAY AND I NEED TO GET IT DONE!!!
Harper gets up in the morning and uses the toilet. Then, she takes a short shower and brushes her teeth. She goes out. When she gets home, she uses the toilet. Then, she fills the dishwasher and runs it. Before bed, she starts the clothes washer, uses the toilet, and brushes her teeth.
1 : Calculate how much water Harper used during the day. Show your work.
2 : Could Harper use less water? Support your answer with data from your calculations.
Answers
Answer:
#1
The answer is 192
Explanation:
Add 5+2=7
7+30+20+50
7+100=107
107+35+25+35
192
:)
Answer #2
Yes Harper could use less water because just for brushing his teeth he used 2 gallons of water.
:)
How can you guess the name of the element using the chemical formula ?
Answers
The number of protons define what element we're dealing with.
Answer: The number of protons define what element we're dealing with.
What is the name given to this group of elements?
a.
halogens
c.
transition metals
b.
alkali metals
d.
noble gases
Answers
Answer: The answer is A. Halogens
Explanation:
I hope this helps you :)
The image shows the gravitational effects of the moon (not shown) on the Earth (depicted here) and the resulting tides that form. Which statements are true about the gravitational force between the Earth and the moon? Select ALL that apply.
Responses
A The moon exerts equal gravitational force on all locations of the Earth
B The moon exerts a smaller gravitational force on Earth locations that are farther away
C The moon must be to the right of the Earth because gravity is an attractive force.
D The moon must be to the left of the Earth because gravity is a repulsive force.
E The moon exerts a greater gravitational force on the Earth than the sun does.
Answers
Answer: B
Explanation:
Brainliest please! (if im right)
Which of these best describes Earth's mantle? (3 points)
a
Most dense layer, consists of the outer and inner parts
b
Thinnest under the oceans and thickest under continents
c
Middle layer, density increases with depth as pressure increases
d
Least dense layer overall, consists of two layers of different thickness
Answers
Answer:
the answer you are looking for is A
Explanation:
Earth's core is the most dense layer and it consists of the outer core and the inner core.
Which is a limitation of comparative investigations?
They give results that are usually not repeatable by other scientists.
They might show variable relationships that are not actually cause and effect.
They can usually only be conducted in labs instead of in natural environments.
They are usually inexpensive, but they do not provide new information.
Answers
Answer:
hi............
Explanation:
Develop models bonds can be placed on a scale that ranges from 100% ionic to 100% covalent. Use what you know about the types of bonds that specific elements tend to form to place each of the following compounds in the correct location on the scale: CO2, N2 , NaF, H2O
Answers
Answer:
Bonds can be placed on a scale that ranges from 100% ionic to 100% covalent.
CO2: CO2 is a covalent compound, with each carbon atom sharing electrons with two oxygen atoms. Therefore, it can be placed closer to the 100% covalent end of the scale.
N2: N2 is a covalent compound, with each nitrogen atom sharing electrons with another nitrogen atom. Therefore, it can be placed closer to the 100% covalent end of the scale.
NaF: NaF is an ionic compound, consisting of a sodium cation (Na+) and a fluoride anion (F-). Therefore, it can be placed closer to the 100% ionic end of the scale.
H2O: H2O is a polar covalent compound, with the hydrogen atoms sharing electrons with the oxygen atom, but the electrons are not shared equally, therefore the oxygen atom has a partial negative charge and hydrogen atoms have a partial positive charge. Therefore, it can be placed closer to the middle of the scale, between ionic and covalent.
Overall, the scale can be represented as follows:
100% Ionic <-------> NaF <-------> H2O <-------> CO2 <-------> N2 <-------> 100% Covalent
For current or former high-achieving, overachiever, perfectionist, and hard-working students: What are three things you wish you could tell your younger, high-achieving self or other school kids who also have the same work ethic as you (basically other young perfectionists)? Multiple people can answer, and I will be marking brainliest on whoever has the best answer.
Answers
Answer:
i dont know
Explanation:
I'm sorry i needed points for my own question! I only had 8:( sorry
Can you please help me
A student is given a sample of pure water, a sample of salt water and a sample of muddy water.
a. Which sample(s) is classified as a compound? How do you know?
b. Which sample(s) are classified as mixtures? How do you know?
c. Classify the mixture(s) as heterogeneous or homogeneous. Justify your answer.
Answers
Answer:
aa. Which sample(s) is classified as a compound? How do you know?
What units would you use to measure a virus?
1.Nanometers
2.micrometers
3.millimeters
Answers
Answer:
(B Nanometers
Explanation:
Most viruses vary in diameter from 20 nanometres (nm; 0.0000008 inch) to 250–400 nm; the largest, however, measure about 500 nm in diameter and are about 700–1,000 nm in length. Only the largest and most complex viruses can be seen under the light microscope at the highest resolution.
Calculate the volume (in cm3
) of 54 g
of water at 1 ∘C
.
Express the volume in cubic centimeters to two significant figures.
Answers
A 4-inch, f/5 telescope has a 1-inch eyepiece focal. Its magnifying power is:
4X
5X
9x
20x
Answers
Its magnifying power is: 4X 5X 9X 20X. A 4-inch, f/5 telescope has a 1-inch eyepiece focal. Its magnifying power is 9x. This answer has been confirmed as correct and helpful.
20x
explanation? I dont need to give one
1. Using D10W and a vial of NaCl 4 mEq/mL, how many mL of NaCl are needed to prepare 250 mL of a
D10/NS solution?
a. 4.8mL
b. 9.6ml
c. 19.6mL
d. 154mL
Answers
To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.
Please help, I don't get what does this means
3. Name the compound sodium makes with the following elements.
(a) Calcium carbonate:
Answers
Answer: hydrogen-carbonate.
Explanation:Because when carbon dioxide is passed in excess it leads to a formation of hydrogen-carbonate.
I hope everyone finds this helpful
what coeiffecents need to be added to balance to balance the chemicial equation Na+02 arrow NaO2
Answers
Answer:
#4 - 4, 1, 2
Explanation:
4Na + 1O2 => 2Na2O
Why is it easier for most metal elements to gain electrons rather than to lose them?
PROPER EXPLANATION
Answers
Because it is easier for metals to shed their valence electrons and form cations for a stable configuration, they have comparatively few chances of acquiring electrons.
The metals usually complete their octet in each reaction. The outermost electron shell often contains more electrons in metals. Metal atoms lose electrons when they interact with other non-metals because the energy of an electron in its outermost shell is very weak.
Metals often have low ionization energy because their electrons are positive in nature. Metals lose their electrons and trade them with non-metals to achieve a stable configuration.
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Answer:
metals typically have relatively low ionization energies
Explanation:
Which of the following statements fully describes what an object may do when it experiences unbalanced forces? Select the two best answers.
A. It may change directions.
B. It will move at a constant speed.
C. It may slow down.
D. It may slow down or speed up.
E. It will stay stationary.
Answers
Answer:b
Explanation:
The toucan uses its long beak to reach fruits and berries growing on trees in the forest. The energy stored in the fruit and berries is passed on to the toucan when it is eaten. What is the source of energy for the fruits and berries growing on the trees in the tropical forest?
A: Soil
B. Sunlight
C. Heat
D. Water
Answers
Answer:
The type of adaptations of the Toucan and Monstera Plant are physical adaptions. Both of these adapted physical characteristics help these organisms to survive. The difference in their physical adaptation is that in the Toucan, the physical characteristic helps the Toucan consume nutrients. Meanwhile, the adaptation of the Monstera Plant helps prevent harmful things such as mold.
Plants use photosynthesis to convert light into cellular energy, which allows them to make “food” out of the water and nutrients from the soil.
How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
Answers
Answer:
39
Explanation:
Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.
———————————
(1/12)th Mass of one C12 atom
Many processes occur in the digestive system. Which process is best classified as a chemical change?
Select one:
Teeth grinding candy
Absorption of water
Enzymes in the saliva break down carbohydrates
Peristalsis in the esophagus
PLEASE HELP!
Answers
Answer:
i think its Enzymes in the saliva break down carbohydrates
Explanation:
Answer:
I believe the answer is Enzymes in the saliva break down carbohydrates
Explanation:
Scientists have discovered a colony of potential organisms on the Planet Moby and named them "Maxoids." Read the information below that scientists have gathered on Maxoids and decide whether Maxoids are living or nonliving things. Explain how you came to this conclusion.
Through testing and observation, scientists have recorded the following characteristics of Maxoids. Maxoids reproduce via sexual reproduction. One parent carries the Maxoid eggs for 12 weeks before they hatch. After hatching, juvenile Maxoids continue to grow for seven months. To acquire energy for growth, Maxoids consume a peculiar liquid substance native to the planet Moby. The Maxoids' cells use this energy, as well as large amounts of water, to carry out important functions. The Maxoids are sensitive to changes in internal temperature. Sometimes they dig holes and lay in them to cool down if they get too warm.
Answers
The Maxoids are living things because they possess the characteristics of living things.
What are living things?Living things are things which have life in them.
Living things are identified by the characteristics which make them living.
The characteristics of living things include:
Movement - living things are able to move all or parts of their bodyRespiration - living things are able to break down food substances to produce energyNutrition - living things are able to take in food substancesIrritability - living things are able to respond to changes around themGrowth - living things are able to increase in size and massExcretion - living things are able to remove waste substances from their bodiesReproduction - living things are able to produce new ones of their kindConsidering the Maxoids;
They are able to reproduceThey take food in the form of a liquid substanceThey are sensitive to changes in internal temperatureIn conclusion, the Maxoids are living things.
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