Henrique Saito

Numerade Educator
In-school tutoring

Biography

My name is Henrique Saito, I am going into my second year of university in the fall, and I am currently studying Engineering Physics at UBC. I do not have any formal work experience with tutoring, but I have spent a lot of time tutoring colleagues taking classes I had already done, as well as helping friends with various STEM classes.

For my last term at UBC, I had to learn to teach myself a lot of the content due to the COVID-19 situation, and so I have learned to really appreciate the value that educational and individual problem-solving videos like the ones on Numerade have. I think I have gained some useful first-hand information on what works and what doesn't and I would love to give back this way.

Education

Henrique has not yet added their education credentials.

Educator Statistics

Numerade tutor for 6 years
100 Students Helped

Topics Covered

Understanding Electromagnetic Waves: A Comprehensive Guide
Understanding Reflection and Refraction of Light: A Comprehensive Guide
Mastering Motion: Achieving Efficiency Along a Straight Line
Motion in 2d or 3d
Discovering the Fundamentals: Newton's Laws of Motion Explained
Understanding Temperature and Heat: A Comprehensive Guide
Unlocking the Secrets of Thermal Properties: Understanding Matter
Understanding the First Law of Thermodynamics: Key Concepts
Understanding the Second Law of Thermodynamics: Key Principles

Henrique's Textbook Answer Videos

02:07
Physics for Scientists and Engineers with Modern Physics

An engine absorbs 1.70 $\mathrm{kJ}$ from a hot reservoir at $277^{\circ} \mathrm{C}$ and expels 1.20 $\mathrm{kJ}$ to a cold reservoir at $27^{\circ} \mathrm{C}$ in each cycle. (a) What is the engine's efficiency? (b) How much work is done by the engine in each cycle? (c) What is the power output of the engine if each cycle lasts 0.300 $\mathrm{s}$ ?

Chapter 22: Heat Engines, Entropy, and the Second Law of Thermodynamics
Henrique Saito
01:06
Physics for Scientists and Engineers with Modern Physics

The work done by an engine equals one-fourth the energy it absorbs from a reservoir. (a) What is its thermal efficiency? (b) What fraction of the energy absorbed is expelled to the cold reservoir?

Chapter 22: Heat Engines, Entropy, and the Second Law of Thermodynamics
Henrique Saito
00:57
Physics for Scientists and Engineers with Modern Physics

A heat engine takes in 360 $\mathrm{J}$ of energy from a hot reservoir and performs 25.0 $\mathrm{J}$ of work in each cycle. Find (a) the efficiency of the engine and $(\mathrm{b})$ the energy expelled to the cold reservoir in each cycle.

Chapter 22: Heat Engines, Entropy, and the Second Law of Thermodynamics
Henrique Saito
02:53
Physics for Scientists and Engineers with Modern Physics

A gun is a heat engine. In particular, it is an internal combustion piston engine that does not operate in a cycle, but comes apart during its adiabatic expansion process. A certain gun consists of 1.80 $\mathrm{kg}$ of iron. It fires one $2.40-\mathrm{g}$ bullet at 320 $\mathrm{m} / \mathrm{s}$ with an energy efficiency of 1.10$\%$ . Assume the body of the gun absorbs all the energy exhaust- the other 98.9$\%$ - and increases uniformly in temperature for a short time interval before it loses any energy by heat into the environment. Find its temperature increase.

Chapter 22: Heat Engines, Entropy, and the Second Law of Thermodynamics
Henrique Saito
01:48
Physics for Scientists and Engineers with Modern Physics

A particular heat engine has a mechanical power output of 5.00 $\mathrm{kW}$ and an efficiency of 25.0$\%$ . The engine expels 8.00 $\times 10^{3} \mathrm{J}$ of exhaust energy in each cycle. Find (a) the energy taken in during each cycle and (b) the time interval for each cycle.

Chapter 22: Heat Engines, Entropy, and the Second Law of Thermodynamics
Henrique Saito
07:46
Physics for Scientists and Engineers with Modern Physics

A multicylinder gasoline engine in an airplane, operating at $2.50 \times 10^{3}$ rev/min, takes in energy $7.89 \times 10^{3} \mathrm{J}$ and exhausts $4.58 \times 10^{3} \mathrm{J}$ for each revolution of the crankshaft. (a) How many liters of fuel does it consume in 1.00 $\mathrm{h}$ of operation if the heat of combustion of the fuel is equal to $4.03 \times 10^{7} \mathrm{J} / \mathrm{L}^{2}$ (b) What is the mechanical power output of the engine? Ignore friction and express the answer in horsepower. (c) What is the torque exerted by the crank-shaft on the load? (d) What power must the exhaust and cooling system transfer out of the engine?

Chapter 22: Heat Engines, Entropy, and the Second Law of Thermodynamics
Henrique Saito
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