how do different materials affect air resistance

"Time (in seconds)" should be on the y axis (the vertical axis), and "Surface area (in square cm)" should be on the x-axis (the horizontal axis). When there is When there is current through any material that has resistance, heat is produced by the collisions of free electrons and atoms. Published by at June 13, 2022. How does the temperature of a wire affect resistance? The free-body diagrams are shown below for the instant in time in which they have reached terminal velocity. About IOT; The Saillant System; Flow Machine. Do different types of materials affect air resistance differently? The longer the conductor, therefore, the higher the resistance. Which types of materials have . So more current starts flowing. The increase in speed leads to an increase in the amount of air resistance. "@type": "Question", So, superconductors are kept at a very low temperature to make the resistance almost zero." is stretched to double its length. You will be recording your results in this data table. Background Premium Resistivity Electrical resistance Electric current The Affects of the Resistance of a Piece of Wire going to investigate what affects the resistance of a piece of wire. The material it is made of 4. Acidity of alcohols and basicity of amines. It is easier to walk in a wide corridor than a narrow one. "@type": "Question", "@type": "FAQPage", Since the 150-kg skydiver weighs more (experiences a greater force of gravity), it will accelerate to higher speeds before reaching a terminal velocity. The parachute slows the skydiver down because it causes air resistance, or drag force. 1#5F/v!pmvUkUhQoo{[k;Ac.%#"HotVKT)c! The ratio of force to mass (Fnet/m) is the same for the elephant and the mouse under situations involving free fall. "text": "Resistance increases with the length of the wire. You can take the total drag to be the sum (integral, really) of the drag on each of a bunch of little pieces of the object's surface, if that's what you mean. Research Questions: Do different types of materials affect air resistance differently? Disadvantages The strength of concrete decreases. The higher the temperature, the more is this movement. rev2023.3.3.43278. These three factors give rise to very high resistance. s213o. Drop each parachute at the same height from the elevated location. Adagio Overview; Examples (videos) Connect the copper wire between terminals A and B. In particular, two questions will be explored: To answer the above questions, Newton's second law of motion (Fnet = ma) will be applied to analyze the motion of objects that are falling under the sole influence of gravity (free fall) and under the dual influence of gravity and air resistance. ", Which material has more affect on air resistance? The specific resistance of copper is \(1.7 \times {10^{ 8}}\Omega {\rm{m}}\).Ans: Given,The length of the wire \({\rm{l = 5\;m}}\)Area of the cross-section of the wire \(A = 1\;{\rm{m}}{{\rm{m}}^2} = {10^{ 6}}\;{{\rm{m}}^2}\)Resistivity \({\rm{\rho = 1}}{\rm{.7 \times 1}}{{\rm{0}}^{{\rm{ 8}}}}{\rm{\Omega m}}\)We know resistance \(R = \frac{{\rho l}}{A}\)\(\Rightarrow R = \frac{{1.7 \times {{10}^{ 8}} \times 5}}{{{{10}^{ 6}}}} = 0.085\;{\rm{\Omega }}\), Q.2. "@type": "Answer", The net force on the object will of course be affected by the object's mass, assuming that gravity is one of the forces on the object. Why are physically impossible and logically impossible concepts considered separate in terms of probability? 4. evolution/natural selectionC. This project delves into the world of web crawlers, caching, indexing and algorithms. Their resistivity is between those of insulators and conductors. "text": "Higher the cross-sectional area, the lower is the resistance." "@type": "Answer", Because of less electrical resistance a thicker wire carries more current with less voltage drop than a thinner wire. It states that the potential difference across a wire is directly proportional to the current flowing through the wire when the temperature of the wire is constant.\({\rm{V}}\alpha {\rm{I}}\)The proportionality constant is the resistance, \(R\)\(V = IR\). Do different colors of light work better than others? . Q.4. Refraction Experiment. Being a property of the location within Earth's gravitational field and not a property of the free falling object itself, all objects on Earth's surface will experience this amount of force per mass. Calculate the average by adding together your three times, and then dividing your answer by three. How do different Materials Affect Air Resistance? On the application of a little energy, the outermost or the loosely packed electrons of the valence band can easily reach the conduction band. "@context": "https://schema.org", "@type": "Question", (2022, March 3). Why do we wear rubber slippers and gloves when working with electricity?Ans: Rubber is an insulator and does not allow current to flow through it. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This greater force of gravity would have a direct effect upon the elephant's acceleration; thus, based on force alone, it might be thought that the 1000-kg baby elephant would accelerate faster. For each parachute, tie one end of each piece of string around one of the four knots, positioning the string right above the knot, as shown in Figure 2 below. /Title ( E d u c a t i o n . Air resistance is a type of friction between air and another material. As such, all objects free fall at the same rate regardless of their mass. Q.1. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? Then use the button to view the answers. Sign in|Recent Site Activity|Report Abuse|Print Page|Powered By Google Sites, Lab #2 Different Materials Affecting Air Resistance. So it depends on the material. Objects that are said to be undergoing free fall, are not encountering a significant force of air resistance; they are falling under the sole influence of gravity. /Creator () At high temperatures, the air velocity increases, reducing or increasing the speed. Handle with Care! It has a very high resistance. How Do Weather Conditions Affect How Fast a Puddle Evaporates? What happens to the resistance of a wire if its area is doubled and length is halved?Ans: Resistance equation is,\({{\rm{R}}_{\rm{1}}}{\rm{ = }}\frac{{{\rm{\rho }}{{\rm{l}}_{\rm{1}}}}}{{{{\rm{A}}_{\rm{1}}}}}\)and\({{\rm{R}}_{\rm{2}}}{\rm{ = }}\frac{{{\rm{\rho }}{{\rm{l}}_{\rm{2}}}}}{{{{\rm{A}}_{\rm{2}}}}}\)Therefore,\(\frac{{{{\rm{R}}_{\rm{2}}}}}{{{{\rm{R}}_{\rm{1}}}}}{\rm{ = }}\frac{{{{\rm{l}}_{\rm{2}}}}}{{{{\rm{l}}_{\rm{1}}}}}{\rm{ \times }}\frac{{{{\rm{A}}_{\rm{1}}}}}{{{{\rm{A}}_{\rm{2}}}}}\)\({{\rm{l}}_{\rm{2}}}{\rm{ = 0}}{\rm{.5 \times }}{{\rm{l}}_{\rm{1}}}\)\({{\rm{A}}_{\rm{2}}}{\rm{ = 2 \times }}{{\rm{A}}_{\rm{1}}}\)\(\frac{{{{\rm{R}}_{\rm{2}}}}}{{{{\rm{R}}_{\rm{1}}}}}{\rm{ = }}\frac{{{{\rm{l}}_{\rm{2}}}}}{{{{\rm{l}}_{\rm{1}}}}}{\rm{ \times }}\frac{{{{\rm{A}}_{\rm{1}}}}}{{{{\rm{A}}_{\rm{2}}}}}{\rm{ = 0}}{\rm{.5 \times 0}}{\rm{.5 = 0}}{\rm{.25}}\). Analyze your data to determine which parachute material dropped the fastest. This extra time is equivalent to the resistance met by the moving charges. Air resistance is a force that slow down objects that are moving through the air This is because the air is made of particles, like any other material and these rub on the surface of a falling object, the resulting friction slowing down the rate of acceleration due to the downward pull of gravitational force Cut 16 pieces of string, making each be 40 cm long. August 4, 2020. Learn more about Stack Overflow the company, and our products. It has a certain conductance and a certain resistance. Tungsten is a metal that has a very high melting point, so it does not melt quickly. Air resistance is mostly affected by air density, temperature, and pressure. ), Shape - try making parachutes of different shapes (circle, rectangle, triangle, etc. 3 0 obj } All conductors have some resistance. Why are superconductors kept at a very low temperature?Ans: Heat increases the resistance. },{ Air-entrainment in concrete must not be done if the site control is not good.17 dic 2019 . Resistance is directly proportional to the length of the conductor.\({\rm{R}} \propto {\rm{l}}\)Simply put, the longer the conductor, the more its resistance. To learn more, see our tips on writing great answers. Is it because they all weigh the same? Angle, and maximum area of projectile motion accounting air resistance. Analyze your data to determine which parachute material dropped the fastest. You can also increase the number of trials above three to get better data and organize your data table accordingly. w !1AQaq"2B #3Rbr 6th Grade Science Projects Middle School Science Fair Projects Elementary Science },{ Procedure for CBSE Compartment Exams 2022, Find out to know how your mom can be instrumental in your score improvement, (First In India): , , , , Remote Teaching Strategies on Optimizing Learners Experience, Area of Right Angled Triangle: Definition, Formula, Examples, Composite Numbers: Definition, List 1 to 100, Examples, Types & More, Electron Configuration: Aufbau, Pauli Exclusion Principle & Hunds Rule. because the air resistance is the same for each? An electrical circuit has resistance to control to flow of current. We define current as the rate of flow of charges. Tie one piece of string to each corner of the plastic square. Does air resistance depend on mass? Why?Ans: Higher the cross-sectional area, the lower is the resistance. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. How does the parachute do this? A good place for your test might be a secure balcony, deck or playground platform. Why is air resistance so counterintuitive? We can explain it using the resistance formula,\(R = \frac{{\rho l}}{A}\)1. Attach a ball of clay to the bottom of the plastic square, paper square and handkerchief. Which types of materials have the greatest affect on air resistance? Test different sized parachutes to see how changes in the size of the parachute affect flight. It is the inherent property of a material to oppose current and is fixed for a particular material.It is also called specific resistance.We define resistivity or specific resistance as the resistance offered by a material of one-metre cube dimension. The specific resistance of some materials are as below: Heat is due to the motion of atoms in a material. The velocity at which this happens is called the terminal velocity. Make a line graph of time vs. surface area. Science Buddies Staff. Format the table using the "Table" tab located in the upper left. Leading AI Powered Learning Solution Provider, Fixing Students Behaviour With Data Analytics, Leveraging Intelligence To Deliver Results, Exciting AI Platform, Personalizing Education, Disruptor Award For Maximum Business Impact, Copyright 2023, Embibe. uW\GqSGHM&FljU> FsZsGSxgJ7WlUasb0#5-='y~]IQA+uhj4uAIi{268Iz9k-8-kyy?rx:vgEK8Nz.^i! Cqn'*C{S~[wt{&@"019+|?P!arF3nr='=FYK)emm~}3^UmZZ)oN&ZHjkn?UOe79q]: TOM0$>Zz;% If a table is needed to organize your data, you may modify the one below to suit your needs.You only need to include the units in the title of each column. According to Ohms law, the potential difference is the product of the resistance of the wire and the current flowing through it. "@type": "Answer", When printing this document, you may NOT modify it in any way. C " "name": "The electric cables that carry current are made of thick bundles of wires. endobj /BitsPerComponent 8 Embiums Your Kryptonite weapon against super exams! } !1AQa"q2#BR$3br n.d. web. Categories . The electric cables that carry current are made of thick bundles of wires. Why does an object that encounters air resistance eventually reach a terminal velocity? 4 0 obj The force of gravity can make an object fall very fast! See Also: What is the unit of resistance? Based on the level of opposition a material has for current through it, we classify them as conductors and insulators. Why does a short circuit causes fire?Ans: When two current-carrying conductors get connected accidentally, there is very low resistance there. The purpose of this science project is to determine whether the amount of air in a soccer ball affects how far it goes when kicked. /Width 165 %&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz What other variables could be tested? How do I align things in the following tabular environment? Types Of Electrical Materials All materials have some amount of resistance, some may be high, and some may be low. ", Q.5. What makes various search engines different? /Filter /DCTDecode Learn about air resistance, also known as drag. 2)Cut the strings in 9 pieces each of 37cm The temperature of the conductorThe resistance is:1. directly proportional to the length \({\rm{(l)}}\) of the conductor.2. Cut a square from the plastic bag and a square from the paper that is the same size as the handkerchief. Find out in this classic science fair project idea. Example 2: Applying the Definitions of Air Resistance and Drag Force Tie one piece of string to each corner of the plastic square. } /ColorSpace /DeviceRGB You will make a series of parachutes from small to large and test how quickly they fall from the same height. Attach 1washer to each bundle of strings with a twist tie. And thus, the direct effect of greater force on the 1000-kg elephant is offset by the inverse effect of the greater mass of the 1000-kg elephant; and so each object accelerates at the same rate - approximately 10 m/s/s. Soccer Physics: Does the Amount of Air Inside the Ball Affect How Far It Goes? How Does Microwave Radiation Affect Different Organisms? How do crystals form? Using Kolmogorov complexity to measure difficulty of problems? This is because the electrons have a shorter distance to travel through the material and are less likely to encounter obstacles that could impede their movement. Drag is affected by the area and shape of the solid object, the speed and orientation of the object relative to the fluid, and various properties of the fluid such as its density and kinematic viscosity. A falling object will continue to accelerate to higher speeds until they encounter an amount of air resistance that is equal to their weight. Punch a hole in each corner of the paper and tie a piece of string through each hole. Materials with a low number of free electrons, such as insulators, have high resistance and are poor conductors of electricity. What RedAct is trying to say, beyond your question, is that drag is not the only force on an object as it travels through a liquid. The higher the air density, due to the aerosol in the air, lowers the objects' speed. We use cookies to provide you with a great experience and to help our website run effectively. The material it is made of 4. ?p?j)cZFrX$l `tnzV(O kI#wyR Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste. Each time record your results in the data table in your lab notebook. All of these forces (thrust, lift, drag and gravity) affect how well a given paper plane's voyage goes . In this aerodynamics science project, you will test whether the size of the parachute is important for slowing down the speed of the fall. (Gravitational forces will be discussed in greater detail in a later unit of The Physics Classroom tutorial.). Do different types of materials affect air resistance differently? << By using this website, you agree to our use of cookies. But why? How do different. In electronic circuits, a device called a resistor having a fixed resistance is used. In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates. etc. >> It is made of coils within coils, thereby lengthening it, making \(l\)very high. Materials: Xylophone Hard rubber mallet Medium rubber mallet Yarn mallet Plastic mallet Spoon Drumstick Tape recorder Stopwatch Postal scale Notepad Experimental Procedure: Weigh each mallet on the postal scale. Let us go through each of these in detail. Cut a square from the plastic bag and a square from the paper that is the same size as the handkerchief. The gravitational field strength is a property of the location within Earth's gravitational field and not a property of the baby elephant nor the mouse. Under such conditions, all objects will fall with the same rate of acceleration, regardless of their mass. endobj Do I need a thermal expansion tank if I already have a pressure tank? There is more pressure of water in a thin pipe than in a wider pipe. Spanish-English dictionary, translator, and learning. How does smell affect taste? The purpose of this science project is to determine whether the amount of air in a soccer ball affects how far it goes when kicked. Cut the paper, plastic bag and the handkerchief into a 18cm x 18cm square. In this science fair project, students will use three different saturated solutions to see how different minerals form crystals over time. Connect and share knowledge within a single location that is structured and easy to search. This Side Up! Materials with a high number of free electrons, such as metals, are typically good conductors of electricity because they have low resistance. Height - drop the parachute from different heights, String Length - change the length of the supporting strings from short to long, String Weight - change the type of string from thin to thick, Material - use different material for the parachute (nylon, cotton, tissue paper, etc. Which material would make the best parachute. ", Bookmark this to easily find it later. "name": "Why does a short circuit causes fire? How does the length of a wire affect its resistance? This experiment will measure how material and weight changes the sound decay of a note. Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste. Air resistance is a crucial factor when designing a parachute. As the name says, these materials conduct partially. Aluminum oxidizes and iron rusts, although it is usally only at the contacts where the biggest problems from corrosion occur. ). How does smell affect taste? So, the lead wires are made to be as short as possible." Dante The Opera Artists; Dante Virtual Opera; Divine Comedy; About IOT. The temperature of the conductor The resistance is: 1. directly proportional to the length \ ( {\rm { (l)}}\) of the conductor. Traffic is smooth with less crowding on a wide road than a narrow lane or a bottleneck.3. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Water comes out faster in a shorter pipe than a longer one. Copyright 2002-2023 Science Buddies. As learned above, the amount of air resistance depends upon the speed of the object. Education.com 308k followers More information Science Fair: How Do Different Materials Affect Air Resistance? However, drag is just the portion of the force on the object that's due to the fluid. /CreationDate (D:20170311185651-05'00') The air pushes the parachute back up, and creates a force . What makes various search engines different? },{ Electrical Conductivity of material depends largely to the escaped electron of the material metals. Attach a ball of clay to the bottom of the plastic square, paper square and handkerchief. Heating a metal conductor makes it more difficult for electricity to flow through it. inversely proportional to the cross-sectional area or thickness \({\rm{(A)}}\) of the conductor. Air resistance is a type of drag force that happens when an object moves through air. /SM 0.02 Attach a ball of clay to the bottom of the plastic square, paper square and handkerchief. The object is said to have reached a terminal velocity. This property is made use in incandescent bulbs made of the tungsten filament in electric heaters and radiators. Terms & Conditions! A good place for your test might be a secure balcony, deck, or playground platform. Close. You will make a series of four parachutes of different sizes, from large to small. National Center for Education Statistics, (n.d.). Reproduction of material from this website without written permission is strictly prohibited. Air resistance is a crucial factor when designing a parachute. However, in a narrow corridor, we bump into people more, hindering our movement. Have another person record the time from the moment the parachute is release until it hits the ground. Is it possible to rotate a window 90 degrees if it has the same length and width? We enable strictly necessary cookies to give you the best possible experience on Education.com. @user58953 It is a real force, much in the same way that friction (e.g., rubbing your shoe on a carpet) is a real force. If Newton's second law were applied to their falling motion, and if a free-body diagram were constructed, then it would be seen that the 1000-kg baby elephant would experiences a greater force of gravity. This means that,\({\rm{R}} \propto {\rm{l}}\)\({\rm{R}} \propto \frac{{\rm{1}}}{{\rm{A}}}\)Therefore,\({\rm{R}} \propto \frac{{\rm{1}}}{{\rm{A}}}\)The proportionality constant is called resistivity \((\rho )\) of the material.The equation relating all these is:\({\rm{R = }}\frac{{{\rm{\rho l}}}}{{\rm{A}}}\), ohms. Q.2. The charges cannot move ahead in such high opposition without increasing the temperature. Lift. As the skydiver is falling, the force of gravity is pulling the skydiver and their parachute towards the earth. To keep the topic simple, it can be said that the two most common factors that have a direct effect upon the amount of air resistance are the speed of the object and the cross-sectional area of the object. homeostasis/reproduction, Why do capillaries connect veins and arteries, Which plant can be reproduced by its stem?give two example . How does the material of wire affect the resistance? Why? Effect of temperature on resistance of insulator The properties of insulators describe that the electrons of the insulators are closely bound to its nucleus and it is very hard to break the bond. Can airtags be tracked from an iMac desktop, with no iPhone? Air resistance (drag) most certainly is a real force, or rather a collection of forces, all of which are attributable in one way or another to a body moving through a fluid, and all of which oppose this movement. 1 0 obj << Get the clay. They have low resistivity or high conductivity. This measured become soft or liquid plastic. It only takes a minute to sign up. How Do Different Materials Affect Air Resistance? How Do Different Materials Affect Air Resistance? [/Pattern /DeviceRGB] This project will examine the relationship between materials and air resistance. So more current starts flowing. "text": "When two current-carrying conductors get connected accidentally, there is very low resistance there. The materials resistance is reduced to \(25\% \)of the original resistance when the length is halved and the area is doubled. The resistivity of the annealed copper is less than the resistivity of hard-drawn copper. These questions will be explored in this section of Lesson 3. Aerospace Engineering & Operations Technician, Aerodynamics & Hydrodynamics Project Ideas. Search. Learn about air resistance, also known as drag. The diagrams above illustrate a key principle. All objects placed upon Earth's surface will experience this amount of force (9.8 N) upon every 1 kilogram of mass within the object. Therefore, with high temperature, resistance increases as the electrons collide more with the atoms surrounding them. All rights reserved. "acceptedAnswer": { The change in velocity terminates as a result of the balance of forces. "Parachutes: Does Size Matter?". Whereas methane and nitrous oxide are powerful greenhouse gases, NOx and ammonia forms particulate matter in the air, which can penetrate deep into the respiratory system. "acceptedAnswer": { The drag on a solid, rigid object isn't affected by the object's mass. How do crystals form? The filament inside the bulb is extremely thin, meaning a very small cross-sectional area, \(A.\)3. Does a summoned creature play immediately after being summoned by a ready action? In the sport of skydiving, a person jumps out of an airplane from a very high altitude, flies through the air, and releases a parachute to help them fall safely to the ground, as shown in Figure 1. What is the resistance of a copper wire of length \(5\;{\rm{m}}\), with a cross-sectional area of \(1\;{\rm{m}}{{\rm{m}}^2}\)? "name": "Why are superconductors kept at a very low temperature? Punch a hole in each corner of the paper and tie a piece of string through each hole. "After the incident", I started to be more careful not to trip over things. },{ Science Project Small Packages Science Project ShamWow vs. Paper Towels vs. Terry Towels Science Project Cell Membrane Science Project Dirty Composition Science Project Fragile! How do you think the amount of drag force a parachute has will affect how well it works? So, the temperature rises, causing the insulating cover around it to melt and start burning. Examples are glass, rubber, plastic, wood. Introduction: This first report in Physics will show the investigation of how the length of a wire affects its resistance. } "name": "Why are the leads in electronic circuits very short? Area of the cross-section of a Conductor: Now take two copper wires of the same length but of a different area of cross-sections. /AIS false This increased mass has an inverse effect upon the elephant's acceleration. @__Y=G"t5\=9VtOR5gn{4r1eIO'NSQ_N|1=?9PfU;#nY6 5m]GpxV3Zu kBj Objective: This project will examine the relationship between materials and air resistance. Did you know that air has substance too? Making statements based on opinion; back them up with references or personal experience. As the skydiver falls slowly to the earth, these "push and pull" forces are nearly in balance. "text": "Rubber is an insulator and does not allow current to flow through it. How will increasing the diameter of the parachute increase its size, or. Now make a graph of your data. To switch between accounts click on the account below. Primary School. I will not go above 1m or below 0. Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. because they all have the same gravity? How does the length of the wire affect resistance? When the distance between two places is more, we take a longer time to reach than in a shorter distance.2. Search. ", Therefore, when the current must pass through a long distance in a conductor, it meets higher opposition. /Subtype /Image What Materials Affect the Length of Sound? If there's gravity, gravity can slow down or accelerate the object depending on direction. Let us see what factors affect the resistance in this article. The resistivity of different materials varies by an enormous amount. In situations in which there is air resistance, why do more massive objects fall faster than less massive objects. The amount of resistance that a material exhibits depends on several factors, including its chemical composition, the size and shape of its conductive elements, and the temperature at which it is operating. Alternatively, if you are using pennies and tape instead, tape 2pennies to each bundle of string. This ratio (Fnet/m) is sometimes called the gravitational field strength and is expressed as 9.8 N/kg (for a location upon Earth's surface). Air resistance is a crucial factor when designing a parachute. Start for free now! Table 1 below shows the list of parachute sizes you will try. Examples are gold, silver, copper, aluminium, etc. It means opposition to electric current. So air resistance is not a real force and is more like a collective term for the different forces that slow down an object (or act against the motive force/thrust) while traveling through air? Kids conduct a cool refraction experiment in materials like water and air for this science fair project. ", Asking for help, clarification, or responding to other answers. Therefore, Ohms law is applicable with a clause that the temperature is constant.Dependency of the resistance with the temperature can be written as,\(R = {R_0}\left( {1 + \alpha \left( {T {T_0}} \right)} \right)\)Where,\(R\)is the resistance when the temperature is \(T\)\({R_0}\) is the resistance when the temperature is \({T_0}\)\(\alpha\)is the temperature coefficient of the resistivitySuperconductors are materials that have almost zero resistance. Air resistance is a crucial factor when designing a parachute. Understanding these factors can help engineers and scientists design materials and devices that have the desired level of resistance for a given application. Why are the leads in electronic circuits very short?Ans: Resistance increases with the length of the wire. It is easier to walk in a wide corridor than a narrow one. Then send your curated collection to your children, or put together your own custom lesson plan. Mechanical Stressing localized strain develops in the metal on the application of the stress of the material. Increased cross-sectional areas result in an increased amount of air resistance. How does light affect plant growth? "acceptedAnswer": { ;SFU^ 3C_\}jVU942Nhj\Gjd-2kuDzzN1X\+NhnP(*h2]4uRhO)"2CZD)nO5$VHvLR4g5,5Wn5FHW]?>zSn&RG\Sx4S1>;+wv{{).c;CT!k{Zqk]GqTn!4xZ4{iCUdQ4uNh\VUITfMT1iMUD6d5ZhZ,O,H i#GPF*R{d^h M0Z>qT!5yoeMR.# 5R?W 1 Answer Sorted by: 2 What a layman calls "air resistance", a physicist would call drag.