In ___________, the material is forced through an opening in a die into the desired shape.
Fill in the blank(s) with the appropriate word(s).
extrusion
You might also like to view...
Which of the following was an important source of prebiotic molecules (e.g., amino acids) on the early Earth?
A) molecules produced on the surface by impacts B) molecules produced by chemical reactions near deep-sea ocean vents C) molecules transported to the surface by impacts D) all of these
A satellite orbiting the Earth in a circular orbit at 400 miles from the center of Earth is moved to a distance of 1,200 miles from the center of Earth. The gravitational force between the Earth and satellite changes by a factor of 3
a. True b. False Indicate whether the statement is true or false
In cryogenic surgery, a small spherical probe is brought into contact with the diseased tissue which is frozen and thereby destroyed. One such probe can be modeled as a 3-mm diameter sphere whose surface is maintained at 240 K when the surrounding tissue is at 314 K. During the surgical procedure, a thin layer of tissue freezes around the probe at a temperature of 273 K. Assuming that the thermal conductivity of a frozen tissue is 1.5 W/(m K) and the heat transfer mechanism at the surface is described by the effective convective coefficient of 50 W/(m2 K), estimate the thickness of frozen tissue formed during a 30 min long operation.
GIVEN
Diameter of sphere(D1)= 3 mm, r1=0.0015 m
Probe surface temperature(Tp)= 240 K
Surrounding tissue temperature(Tt)= 314 K
Tissue freezing temperature(Tf)= 273 K
Thermal conductivity of frozen tissue(kt)= 1.5 W/(m K)
Effective convective coefficient (h?)=50 W/(m2 K)
Operation time (t)= 30 min
FIND
Thickness of a frozen tissue formed
ASSUMPTIONS
1 dimensional Steady state conditions persist
Negligible contact resistance between probe and frozen tissue.
Constant properties.
SKETCH
An object of mass m is moving on a horizontal rough surface. At a certain point it has a speed v m/s and it comes to a stop after traveling 32 m
If the coefficient of friction between the object and the surface is 0.40, what is the value of speed v? Use g = 10 m/s2. A) 16 m/s B) 26 m/s C) 32 m/s D) 38 m/s E) 10 m/s