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Zachary Warner

University of Kansas

Biography

My name is Zachary Warner and I am currently a Ph.D. student at the University of Kansas. My areas of interest include nuclear physics, higher energy particle physics, and astroparticle physics. Currently I am working for a research group whose aim is to further the our understanding of Quantum Chromodynamics (QCD) by searching for specific signatures in data that is taken from high energy proton-proton collisions and proton-heavy nuclei collisions at the Large Hadron Collider (LHC). As a student I am not only interested in learning new physics, but in passing on the knowledge I have obtained in my years of studying physics and astronomy as an undergraduate. For this reason I also spend time both teaching and tutoring undergraduate and high school students who wish to deepen their understanding of the universe.

Education

BS Physics
University of Kansas
Phd Physics
University of Kansas
BS Astronomy
University of Kansas

Topics Covered

Temperature and Heat
Physics Basics
Motion Along a Straight Line
Motion in 2d or 3d
Newton's Laws of Motion
Rotation of Rigid Bodies
Dynamics of Rotational Motion
Equilibrium and Elasticity
Periodic Motion
Mechanical Waves
Sound and Hearing
Kinetic Energy
Potential Energy
Energy Conservation
Moment, Impulse, and Collisions
Electromagnetic Waves
Current, Resistance, and Electromotive Force
Thermal Properties of Matter
Electric Charge and Electric Field
Electric Potential
Reflection and Refraction of Light
Electromagnetic Induction
Inductance
Wave Optics
Magnetic Field and Magnetic Forces
Sources of Magnetic field
Atomic Physics
Nuclear Physics
Particle Physics
Alternating Current
Quantum Physics
Gravitation
The First Law of Thermodynamics
The Second Law of Thermodynamics
Fluid Mechanics
Applying Newton's Laws
Functions
Trigonometry

Zachary's Textbook Answer Videos

07:09
University Physics with Modern Physics

Animals in cold climates often depend on two layers of insulation: a layer of body fat (of thermal conductivity 0.20 W/m $\cdot$ K) surrounded by a layer of air trapped inside fur or down. We can model a black bear (Ursus americanus) as a sphere 1.5 m in diameter having a layer of fat 4.0 cm thick. (Actually, the thickness varies with the season, but we are interested in hibernation, when the fat layer is thickest.) In studies of bear hibernation, it was found that the outer surface layer of the fur is at 2.7$^\circ$C during hibernation, while the inner surface of the fat layer is at 31.0$^\circ$C. (a) What is the temperature at the fat-inner fur boundary so that the bear loses heat at a rate of 50.0 W? (b) How thick should the air layer (contained within the fur) be?

Chapter 17: Temperature and Heat
Section 7: Mechanisms of Heat Transfer
Zachary Warner
02:06
University Physics with Modern Physics

Consider the circuit shown in Fig. E29.31, but with the bar moving to the right with speed v. As in Exercise 29.31, the bar has length 0.360 m, $R$ = 45.0 $\Omega$, and $B =$ 0.650 T. (a) Is the induced current in the circuit clockwise or counterclockwise? (b) At an instant when the 45.0-$\Omega$ resistor is dissipating electrical energy at a rate of 0.840 J/s, what is the speed of the bar?

Chapter 29: Electromagnetic Induction
Section 4: Motional Electromotive Force
Zachary Warner
05:22
University Physics with Modern Physics

A long, thin solenoid has 900 turns per meter and radius 2.50 cm. The current in the solenoid is increasing at a uniform rate of 36.0 A/s. What is the magnitude of the induced electric field at a point near the center of the solenoid and (a) 0.500 cm from the axis of the solenoid; (b) 1.00 cm from the axis of the solenoid?

Chapter 29: Electromagnetic Induction
Section 5: Induced Electric Fields
Zachary Warner
05:07
University Physics with Modern Physics

A very long, rectangular loop of wire can slide without friction on a horizontal surface. Initially the loop has part of its area in a region of uniform magnetic field that has magnitude $B =$ 2.90 T and is perpendicular to the plane of the loop. The loop has dimensions 4.00 cm by 60.0 cm, mass 24.0 g, and resistance $R =$ 5.00 $\times$ 10$^{-3} \Omega$. The loop is initially at rest; then a constant force $F_{ext}$ = 0.180 N is applied to the loop to pull it out of the field (Fig. P29.46). (a) What is the acceleration of the loop when $v =$ 3.00 cm/s? (b) What are the loop's terminal speed and acceleration when the loop is moving at that terminal speed? (c) What is the acceleration of the loop when it is completely out of the magnetic field?

Chapter 29: Electromagnetic Induction
Zachary Warner
05:18
University Physics with Modern Physics

In the circuit in Fig. P29.47, an emf of 90.0 V is added in series with the capacitor and the resistor, and the capacitor is initially uncharged. The emf is placed between the capacitor and switch $S$, with the positive terminal of the emf adjacent to the capacitor. Otherwise, the two circuits are the same as in Problem 29.47. The switch is closed at $t =$ 0. When the current in the large circuit is 5.00 A, what are the magnitude and direction of the induced current in the small circuit?

Chapter 29: Electromagnetic Induction
Zachary Warner
02:35
University Physics with Modern Physics

Suppose the loop in $\textbf{Fig. P29.50}$ is (a) rotated about the $y$-axis; (b) rotated about the x-axis; (c) rotated about an edge parallel to the $z$-axis. What is the maximum induced emf in each case if $A =$ 600 cm$^2$, $\omega$ = 35.0 rad/s, and $B =$ 0.320 T?

Chapter 29: Electromagnetic Induction
Zachary Warner
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