Ethan Deweese

Numerade Educator
Teaching Assistant

Biography

I'm passionate about engineering and especially airplanes and all things that fly. I also love to make things, especially when I can use the things I learned in school to design it.

Education

Ethan has not yet added their education credentials.

Educator Statistics

Numerade tutor for 4 years
1067 Students Helped

Topics Covered

Master the Fundamentals of Physics: Learn Physics Basics
Discovering the Fundamentals: Newton's Laws of Motion Explained
Discover the Power of Gravitation: Exploring the Science Behind It
Mastering Motion: Achieving Efficiency Along a Straight Line
Mastering Newton's Laws: Tips for Applying Them Effectively
Unlock the Secrets of Fluid Mechanics with Our Expert Guide

Ethan's Textbook Answer Videos

04:28
Physics

A Meteorite Strikes On October $9,1992,$ a 27 -pound meteorite
struck a car in Peekskill, NY, leaving a dent 22 $\mathrm{cm}$ deep in the
trunk. If the meteorite struck the car with a speed of $130 \mathrm{m} / \mathrm{s},$
what was the magnitude of its deceleration, assuming it to be
constant?

Chapter 2: One-Dimensional Kinematics
Ethan Deweese
02:50
Physics for Scientists and Engineers with Modern Physics

A golf ball travels with a speed of 90.0 $\mathrm{m} / \mathrm{s}$ . By what fraction does its relativistic momentum magnitude $p$ differ from its classical value $m u$ ? That is, calculate the ratio $(p-m u) / m u .$

Chapter 39: Relativity
Ethan Deweese
05:29
College Physics: A Strategic Approach

Blood in a carotid artery carrying blood to the head is moving at $0.15 \mathrm{m} / \mathrm{s}$ when it reaches a section where plaque has narrowed the artery to $80 \%$ of its diameter. What pressure drop occurs when the blood reaches this narrow section?

Chapter 13: Fluids
Ethan Deweese
02:41
Applied Physics

A rock of a mass $13.0 \mathrm{kg}$ is dropped from a cliff. Find its weight.

Chapter 5: Force
Ethan Deweese
05:23
Principles of Physics

A golf ball is struck at ground level. The speed of the golf ball as a function of the time is shown in Fig. 4-27, where $t=0$ at the instant the ball is struck. The scaling on the vertical axis is set by $v_{a}=19 \mathrm{~m} / \mathrm{s}$ and $v_{b}=31 \mathrm{~m} / \mathrm{s}$. (a) How far does the golf ball travel horizontally before returning to ground level? (b) What is the maximum height above ground level attained by the ball?

Chapter 4: Motion in Two and Three Dimensions
Ethan Deweese
1

Ethan's Quick Ask Videos

07:23
Physics 101 Mechanics

This is why you have to be very careful when driving in the
rain! On a dry road, a car with good tires may be able to
brake with a constant deceleration of 4.92
m/s2 . (a) How long does such a car, initially
traveling at 24.6 m/s, take to stop? (b) How far does it travel in
this time? (c)
Graph x versus t and v versus t for
the deceleration. (d) By what factor would your answer to (b)
change if the car were driving on a wet road, and could only
achieve half the deceleration it has on a dry road?

Ethan Deweese
03:40
Physics 101 Mechanics

A car is driving around a perfectly circular curve at a constant
speed. What is the direction of the net force acting on the
car?
The net force is directed away from the center of the circular
curve.
The net force points in the same direction as the velocity.
The net force acting on the car is zero.
The net force is directed towards the center of the curve

Ethan Deweese
02:27
Physics 101 Mechanics

A disk with a diameter of 10.0 cm rotates counter clockwise at an angular velocity of 3.0 rad/s. What is the tangential velocity at edge of the disk?

Ethan Deweese
08:34
Physics 101 Mechanics

Bob has just finished climbing a sheer cliff above a beach and wants to figure out how high he climbed. All he has to use, however, is a baseball, a stopwatch, and a friend on the beach below with a long measuring tape. Bob is a pitcher and he knows that the fastest he can throw the ball is about v0 = 34.5 m/s. Bob starts the stopwatch as he throws the ball (with no way to measure the ball's initial trajectory) and watches carefully. The ball rises and then falls, and after t1 = 0.510 s, the ball is once again level with Bob. Bob cannot see well enough to time when the ball hits the ground. Bob's friend then measures that the ball landed x = 125 m from the base of the cliff. How high up is Bob if the ball started exactly 2 m above the edge of the cliff? What is Bob's position?

Ethan Deweese
04:21
Physics 101 Mechanics

Alcohol consumption is known to slow reaction times. As a
consequence, it may take a sober driver 0.41 s to hit the brakes to
avoid an accident and a drunk driver 1.12 s. If a driver is
initially traveling at 63.6 mph, how many meters farther will their
car travel before the brakes are applied when they are drunk
compared to when they are sober?

Ethan Deweese
04:47
Physics 101 Mechanics

A 1-lb block and a 100-lb block are placed side by side at the top of a frictionless hill. Each is given a very light tap to begin their race to the bottom of the hill. In the absence of air resistance, what can you conclude about the outcome of the race?

The 1-lb block wins the race.
The 100-lb block wins the race.
The two blocks end in a tie.
There's not enough information to determine which block wins the race.

Ethan Deweese
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