Question

What is Hamburg Wheel-Track Testing of Compacted Asphalt
Mixtures

Answer #1

During a testing process, a worker in a factory mounts a bicycle
wheel on a stationary stand and applies a tangential resistive
force of 115 N to the tire's rim. The mass of the wheel is 1.40 kg
and, for the purpose of this problem, assume that all of this mass
is concentrated on the outside radius of the wheel. The diameter of
the wheel is 55.0 cm. A chain passes over a sprocket that has a
diameter of 9.25...

A 210 g toy car is placed on a narrow 70-cm-diameter track with
wheel grooves that keep the car going in a circle. The 1.1 kg track
is free to turn on a frictionless, vertical axis. The spokes have
negligible mass. After the car's switch is turned on, it soon
reaches a steady speed of 0.71 m/s relative to the track
What then is the track's angular velocity, in rpm?
Express your answer to two significant figures and include the...

If the insolation of the Sun shining on asphalt is 7.3
×
102 W/m2, what is the change in temperature
of a
3.5 m2
by
4.0 cm
thick layer of asphalt in
1.0 hr?
(Assume the albedo of the asphalt is 0.12, the specific heat of
asphalt is 0.22 cal/g
·
°
C, and the density of asphalt is
2.3 g/cm3.)
Δ
T =
°
C

What is the principle of paper chromatography? Why can be the
mixtures of dyes be separated using this method?

A bicycle wheel of radius r is rolling without slipping with
constant speed Vo around a track with radius R (>>r). What is
the acceleration at the highest and lowest points of the wheel?
Choose the coordinate system with the origin at the center of the
wheen, rather than have the moving system rotate with the wheel,
choose the system which the z' axis points upward.

Separating and Identiying Mixtures by Gas
Chromatography
1. What precautions are necessary when working around the GC
injection port?

What is the effective gravitational acceleration at the bottom
position of a Ferris wheel if the wheel has a radius of 8.0m and
has a period of 10.0s? Top position? Side position? Use a
coordinate system in which up is the +y direction and the line from
the center of the wheel to the side position is the +x direction.
Please give all answers as vectors.

What do the root DNS Servers track?

a grinding wheel of 50cm in diameter rotates at 6000 rpm. what
is the tangential speed of a point on the edge of the grinding
wheel in m/s?

What is the aim of hypothesis testing? What does hypothesis
testing achieve that could not be otherwise achieved?
How does hypothesis testing help support the fields that employ
the scientific method? Besides hypothesis testing, are there
alternative ways to validate the research findings?

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