For what combination of an object's physical properties and speed through the air may we "neglect...
For what combination of an object's physical properties and speed through the air may we "neglect air resistance", as often assumed in science textbooks, and treat the object as falling under the influence of gravity alone?
Homework Answers
We can neglect air resistance if the object's cross sectional surface area is small or if the speed of object is low.
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For what combination of an object's physical properties and
speed through the air may we "neglect...
By now, you may be getting sick of hearing that we may ignore air resistance" in...
By now, you may be getting sick of hearing that we may ignore air resistance" in problems. We did that before because we did not have knowledge of forces. But now... Let's see just how powerful air resistance is on Earth. Assuming that we are standing on the surface of Earth, let's find the fractional difference between the maximum heights reached for each case. 1. Simple case first: a ball thrown upwards without air. Find an expression for the maximum...
please explain the answer 1) Up until now we have always ignored air resistance. We should...
please explain the answer
1) Up until now we have always ignored air resistance. We should now add it. Let us just think of simple 1-dimensional problem, dropping a ball of mass m from a height H but 2 with air resistance. We can model the air resistance as a force proportional to the velocity, fair = bv. The coefficient bis a constant. (For this problem you can use calculus textbooks or wolfram alpha to do the calculus.) What are...
1) Up until now we have always ignored air resistance. We should now add it. Let...
1) Up until now we have always ignored air resistance. We should now add it. Let us just think of simple 1-dimensional problem, dropping a ball of mass m from a height H but with air resistance. We can model the air resistance as a force proportional to the velocity, fair = bu. The coefficient b is a constant. (For this problem you can use calculus textbooks or wolfram alpha to do the calculus.) • What are the units on...
please explain the answer. 1) Up until now we have always ignored air resistance. We should...
please explain the answer.
1) Up until now we have always ignored air resistance. We should now add it. Let us just think of simple 1-dimensional problem, dropping a ball of mass m from a height H but 2 with air resistance. We can model the air resistance as a force proportional to the velocity, fair = bv. The coefficient bis a constant. (For this problem you can use calculus textbooks or wolfram alpha to do the calculus.) What are...
A ball thrown horizontally with speed vi = 20.0 m/s travels a horizontal distance of d...
A ball thrown horizontally with speed vi = 20.0 m/s travels a horizontal distance of d = 58.0 m before hitting the ground. From what height h was the ball thrown? When setting up projectile motion questions, which of the following characteristics of projectile motion are important to keep in mind? Check all that apply. a. Projectile motion is the motion of an object that moves in two dimensions under the influence of gravity and air resistance. b. Although the...
Please help with Q1 a)b)c). Question 1: In the lectures we considered simple projectile motion. Here we extend the description to include air resistance. For macroscopic objects in air, the dynamics...
Please help with Q1 a)b)c).
Question 1: In the lectures we considered simple projectile motion. Here we extend the description to include air resistance. For macroscopic objects in air, the dynamics equations including air resistance may be written V and ^- where m is the mass of the object, g is the acceleration due to gravity, y is the vertical direction, C is a dimensionless drag coefficient, A is the cross-sectional area of the object, pa 1.2kg/m3 is the density...
According to the five-step model of bystander intervention, what is the first thing you must do...
According to the five-step model of bystander intervention, what is the first thing you must do as a potential helper? Decide whether you would know how to help under the particular circumstances Decide whether it is your responsibility to help Notice that something unusual is happening Decide if help is actually needed According to the text, military aggression for the purpose of defending one's own territory is considered which type of aggression? Anomic aggression Instrumental aggression Egoistic aggression Altruistic aggression...
Question 1 1 pts What is the kinetic energy of a man who weighs 980N who...
Question 1 1 pts What is the kinetic energy of a man who weighs 980N who is riding in a car traveling 40 km per hour? Express your answer in Joules, but don't type the unit in the answer box. Round to the nearest whole number. (Careful with the units) 1 pts Astudent slides her 80.0-kg desk across the level floor of her dormitory room a distance 4.00 m at constant speed. If the coefficient of kinetic friction between the...
Pre-Laboratory Exercise: Plastics Identification I. List four properties that you will use in lab...
can
someone help me find this information?
Pre-Laboratory Exercise: Plastics Identification I. List four properties that you will use in lab to determine the identity of the polymer samples 2. Describe the density test. What observation will help you determine the density of each polymer? What precautions should be taken in placing the sample in the solutions? 3. Write the name and abbreviation for the six recyclable polymers 2 huetn deisity polyetayene.HDpz poulene: PP 4. Given the list of wavenumber...
Separating a Mixture, Recrystallization, pre-lab assignment could you also explain why you chose that substance for...
Separating a Mixture, Recrystallization, pre-lab
assignment
could you also explain why you chose that substance for the empty
spaces and question marks
EXPERIMENT 4 Pre-Lab Assignment Separating a Mixture, Recrystalliration Name Date 1. Complete the following flowchart which shows how to separate a mixture of sand, sodium chloride and acetanilide. Notice that after a separation process (a down arrow) the filtered solids are shown on the left and the filtrate (the liquid) is shown on the right. The terminal step...
By now, you may be getting sick of hearing that we may ignore air resistance" in problems. We did that before because we did not have knowledge of forces. But now... Let's see just how powerful air resistance is on Earth. Assuming that we are standing on the surface of Earth, let's find the fractional difference between the maximum heights reached for each case. 1. Simple case first: a ball thrown upwards without air. Find an expression for the maximum...
please explain the answer
1) Up until now we have always ignored air resistance. We should now add it. Let us just think of simple 1-dimensional problem, dropping a ball of mass m from a height H but 2 with air resistance. We can model the air resistance as a force proportional to the velocity, fair = bv. The coefficient bis a constant. (For this problem you can use calculus textbooks or wolfram alpha to do the calculus.) What are...
1) Up until now we have always ignored air resistance. We should now add it. Let us just think of simple 1-dimensional problem, dropping a ball of mass m from a height H but with air resistance. We can model the air resistance as a force proportional to the velocity, fair = bu. The coefficient b is a constant. (For this problem you can use calculus textbooks or wolfram alpha to do the calculus.) • What are the units on...
please explain the answer.
1) Up until now we have always ignored air resistance. We should now add it. Let us just think of simple 1-dimensional problem, dropping a ball of mass m from a height H but 2 with air resistance. We can model the air resistance as a force proportional to the velocity, fair = bv. The coefficient bis a constant. (For this problem you can use calculus textbooks or wolfram alpha to do the calculus.) What are...
Please help with Q1 a)b)c).
Question 1: In the lectures we considered simple projectile motion. Here we extend the description to include air resistance. For macroscopic objects in air, the dynamics equations including air resistance may be written V and ^- where m is the mass of the object, g is the acceleration due to gravity, y is the vertical direction, C is a dimensionless drag coefficient, A is the cross-sectional area of the object, pa 1.2kg/m3 is the density...
Question 1 1 pts What is the kinetic energy of a man who weighs 980N who is riding in a car traveling 40 km per hour? Express your answer in Joules, but don't type the unit in the answer box. Round to the nearest whole number. (Careful with the units) 1 pts Astudent slides her 80.0-kg desk across the level floor of her dormitory room a distance 4.00 m at constant speed. If the coefficient of kinetic friction between the...
can
someone help me find this information?
Pre-Laboratory Exercise: Plastics Identification I. List four properties that you will use in lab to determine the identity of the polymer samples 2. Describe the density test. What observation will help you determine the density of each polymer? What precautions should be taken in placing the sample in the solutions? 3. Write the name and abbreviation for the six recyclable polymers 2 huetn deisity polyetayene.HDpz poulene: PP 4. Given the list of wavenumber...
Separating a Mixture, Recrystallization, pre-lab
assignment
could you also explain why you chose that substance for the empty
spaces and question marks
EXPERIMENT 4 Pre-Lab Assignment Separating a Mixture, Recrystalliration Name Date 1. Complete the following flowchart which shows how to separate a mixture of sand, sodium chloride and acetanilide. Notice that after a separation process (a down arrow) the filtered solids are shown on the left and the filtrate (the liquid) is shown on the right. The terminal step...
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