Category: Physics

Why are you seeking a graduate degree in Atmospheric Sciences at the University of Washington? What knowledge and skills do you hope to achieve from the graduate program that will be useful to your long-term career goals?

Aerosol, Cloud, Radiation-Observation, and Simulation

Why are you seeking a graduate degree in Atmospheric Sciences at the University of Washington? What knowledge and skills do you hope to achieve from the graduate program that will be useful to your long-term career goals?

Describe an example of how you have shown resilience and/or perseverance in the pursuit of your academic goals or in your personal life and how you have grown as a result.

Describe experiences that have given you skills that prepare you for graduate school, or how your experiences (academic, research, or otherwise) add to our department.

If this experiment does not give you mass of the rolling object (solid cylinder/sphere), are you still able to calculate the % error of the moment inertia?

QUESTIONS:

1. Assuming that a person releases both a solid cylinder and solid sphere (with the same mass and radius) from rest at location A, which object do you expect will reach location B first?

2. If this experiment does not give you mass of the rolling object (solid cylinder/sphere), are you still able to calculate the % error of the moment inertia?

3. Based on the experimental data in the video, can you calculate the object’s translational acceleration and angular acceleration?

Describe a key flight that changed the world and how it has influenced you.

Discussion: Putting it All Together – The Crossroads of Science, Technology, and Society

Write a postcard to a famous aviator that makes specific connections between your personal interest in aviation-related sciences and their contributions to aviation.

Describe a key flight that changed the world and how it has influenced you.

Describe how a ground-breaking aircraft has impacted your life.

Develop an evidence-based argument that supports the claim that humans have and continued to gain inspiration from nature in developing and improving flight technology:Discuss?

Module 1 – A&S Question (PLG1)
Question 1

Develop an evidence-based argument that supports the claim that humans have and continued to gain inspiration from nature in developing and improving flight technology:Discuss?

Question 2

Applying published scientific research along with concepts involved in the evolution of birds, bio-aerial locomotion, and the basic principles of flight, develop an evidence-based argument that supports the claim that frigate birds can stay aloft for months during transoceanic flights.

Explain why the aircraft’s ability to take off, land, and climb during the touch and go’s will be negatively impacted. Include an image within your document that visualizes the explanation.

Module 2 – Focus Topic: Density Altitude (PLG 1)

Now, synthesize and apply the information you reviewed on the concept of density altitude to address the following:

Using terms that an average person could easily understand and by applying related concepts and terms, present a practical definition of density altitude.
Fill in the blank: If the value of density altitude is relatively high, the air density is relatively _______.
Of the four main forces acting on aircraft, name the ones that are reduced by high density altitude flying conditions.
Of the four main forces acting on aircraft, name the one that can be altered, in the process of proper flight planning, to reduce the impact of high density altitude flying conditions.

Explain why a combination of high, hot, and humid conditions creates high density altitude flying conditions. Your explanation should involve a discussion of how air temperature, pressure, humidity affect air density and thus the density altitude.

Apply your understanding of density altitude to answer the following scenario-based question:

A general aviation pilot in training is scheduled to do repeated touch and go’s (landing and taking off again without coming to a full stop) in a Cessna 172 at Bob Adams Field in Steamboat Springs, Colorado (elevation 6882 feet) on a mid-afternoon in early August. Explain why the aircraft’s ability to take off, land, and climb during the touch and go’s will be negatively impacted. Include an image within your document that visualizes the explanation.

What would be the density of this person? Give the answer in units of kg ni3 and in g/cc.Does this density seem reasonable to you? In other words, do you think a person could be about that tall and weigh about that much? Why or why not?

Mathematical Homework Assignment for Lecture 06

[a] A liter is a measure of volume equal to 1000 cc (cm). About how tall do you think a person with a body volume (head + limbs + torso) of Z liters would be? Feel free to make measurements of your own body to get useful data that would help you answer this question.

[b] Let’s say this person also happens to have a mass of Z kilograms (kg). How many pounds would this person weigh?

[c] What would be the density of this person? Give the answer in units of kg ni3 and in g/cc.

[d] Does this density seem reasonable to you? In other words, do you think a person could be about that tall and weigh about that much? Why or why not?

How much sugar (which is a carbohydrate) would that person’s body need to metabolize to produce that much energy? You can estimate that stair-jumping is about as efficient as climbing.

Mathematical Homework Assignment for Lecture 08

[a] A person has a weight at Earth’s surface of Z pounds. What is their mass in kilograms?

[b] If that person jumps six inches into the air, they will add 1.5 joules of potential energy to their body for each kilogram of mass they are. How much potential energy will they add in total if they jump at the bottom of a staircase and land on a higher step 12 inches up?

[c] How much sugar (which is a carbohydrate) would that person’s body need to metabolize to produce that much energy? You can estimate that stair-jumping is about as efficient as climbing.

[d] A typical fun-size (not full-size) candy bar has, in addition to other ingredients, 10 grams of sugar. How many 12-inch stair-jumps would this person need to do to use up the food energy stored in the sugar of such a candy bar? Does that seem like a reasonable number of stair-jumps to do in a typical exercise session?

What, then is c’ andwhat units should that quantity have? flow many digits are significant in that answer? Explain why.Does that amount of energy seem like a lot or a little? Explain your answer, citing any sources you use.

Mathematical Homework Assignment for Lecture 07

[a] In the equation E = mc’ discovered by Albert Einstein in 1905, c is the speed of any particle of light traveling through vacuum. It is defined to be exactly 299,792,458 meters per second (m s’). What, then is c’ and what units should that quantity have? flow many digits are significant in that answer? Explain why.

[b] An object with a mass of Y kilograms would be equal in mass to about how many paper clips? As always, explain your reasoning and show all calculations that you use.

[c] If that object’s mass were converted into energy, how much energy would result? Make sure to give your answers in units of kilogram meters squared per second squared (kg m2 s’). Two digits of your answer are significant.

[d] Does that amount of energy seem like a lot or a little? Explain your answer, citing any sources you use.

If, rather than bending at the waist with outstretched arms, you instead stand close to the child, bend at the knees, and lift by straightening your legs while keeping your back close to vertical, how much force will those back muscles experience? Draw a sketch of this physical system to show where the torques would be. What do you think would be the health advantages or disadvantages of this lifting method?

Mathematical Homework Assignment for Lecture 05

[a] You are about to lift a small child off the ground. This child weighs Z pounds. How many newtons of gravitational force downward does this child produce?

[b] Use a ruler to measure, to the nearest centimeter, the distance from:

The center of your hand to your elbow. Let’s call this distance r,.
Your elbow to your shoulder. Let’s call this distance r2.

Your shoulder to your lower back (spine). Let’s call this distance r3.
[c] If you lift the child up off the ground, you will experience a moment of force — that is, a torque — on the set of joints from your hand to your spine.

Draw a simple sketch (a stick figure is fine) of the physical system where you lift the child with your outstretched arms bent over at your waist, and compute the torque (in units of newton meters, or N m) at your elbow (distance r,), at your shoulder (r, + r2), and at your spine (r, + r2+ r3).

[d] A set of small muscles are attached to your spine at a distance of about 2 inches (0.05 m) from the spine itself. Those muscles must exert force to balance the torque you experience when lifting the child. How much force will those back muscles experience? How many times more force is that than the actual weight of the child?

[e] If, rather than bending at the waist with outstretched arms, you instead stand close to the child, bend at the knees, and lift by straightening your legs while keeping your back close to vertical, how much force will those back muscles experience? Draw a sketch of this physical system to show where the torques would be. What do you think would be the health advantages or disadvantages of this lifting method?