Question
In: Mechanical Engineering
A disk is cast in an open mould with diameter 25 cm and height 15 mm....
A disk is cast in an open mould with diameter 25 cm and height 15 mm. The pouring temperature is 1200°C. Calculate the total heat evolved during cooling if the disk was cast in copper, and given that the heat of fusion is 200 kJ/kg.
Solutions
samet mamat answered 2 years agoRelated Solutions
A cylindrical glass tank with a diameter of 8.6 cm and a height of 25 cm...
A cylindrical glass tank with a diameter of 8.6 cm and a height
of 25 cm is inverted and inserted into another tank of water. If no
air is allowed to escape from the glass container when submerged,
what is the height of the air column in the glass tank when its
edge is 2.0 m below the surface of the water?
a thin circular-disk earning,5.00 cm in diameter is plated with a coating of gold 0.20 mm...
a thin circular-disk earning,5.00 cm in diameter is plated with
a coating of gold 0.20 mm thick from an Au+3 bath.
a) how many days does it take to deposit the gold on one side of
this earring if the current is 0.010 Ampere (d of Au = 19.3
g/cm3)
b) how many days does it take to deposit the gold on both sides
of a pair of these earrings
c) if the price of Au is $320 per troy...
A 750 g disk and a 760 g ring, both 15 cm in diameter, are rolling...
A 750 g disk and a 760 g ring, both 15 cm in diameter, are
rolling along a horizontal surface at 1.7 m/s when they encounter a
15 ? slope.
How far up the slope does the disk travel before rolling back
down?
How far up the slope does the ring travel before rolling back
down?
A 240 g , 25-cm-diameter plastic disk is spun on an axle through its center by...
A 240 g , 25-cm-diameter plastic disk is spun on an axle through
its center by an electric motor.
What torque must the motor supply to take the disk from 0 to
2000 rpm in 4.3 s ?
Express your answer in newton-meters.
t=
A 240 g , 25-cm-diameter plastic disk is spun on an axle through its center by...
A 240 g , 25-cm-diameter plastic disk is spun on an axle through
its center by an electric motor.
What torque must the motor supply to take the disk from 0 to
1800 rpm in 4.8 s ?
A toroid with inner diameter of 3 cm, outer diameter of 5 cm, and height of...
A toroid with inner diameter of 3 cm, outer diameter of 5 cm,
and height of 0.1 cm is made of a body-centered-cubic (bcc)
paramagnetic material with lattice parameter equal to 0.5 nm. The
toroid is wrapped by a copper wire in 20 turns. If each atom of the
magnetic material has a magnetic moment of 1.5µB (Bohr Magneton),
(a) (1.5 pt) What is the saturation magnetization (in A/m) of the
material? (b) (1.5 pt) If a current of 2...
A cast iron water pipe of 500 mm inside diameter and 20 mm thick, is supported...
A cast iron water pipe of 500 mm inside diameter and 20 mm
thick, is supported over a span of 10 meters. Find the maximum
bending stress in the pipe metal, when the pipe is running full.
Take density of cast iron = 70.6 kN/m3 and water = 9.8 kN/m3
A 250 g, 25-cm-diameter plastic disk is spun on an axle through its center by an electric motor.
A 250 g, 25-cm-diameter plastic disk is spun on an axle through its center by an electric motor.
What torque must the motor supply to take the disk from 0to 1600 rpm in 4.8 s?
Water flows through a cast iron pipe with a diameter of 30 mm. The pipe is...
Water flows through a cast iron pipe with a diameter of 30 mm.
The pipe is inclined at an angle of 3 degrees from horizontal and
is 40 m long. The water flows due to gravity only. What is the
maximum volume flow rate of the water?
You may ignore any minor loses.
A 8.0-cm-diameter disk emits light uniformly from its surface. 20 cm from this disk, along its...
A 8.0-cm-diameter
disk emits light uniformly from its surface. 20
cm from
this disk, along its axis, is an 9.0-cm-diameter
opaque black disk; the faces of the two disks are parallel.
20
cm beyond
the black disk is a white viewing screen. The lighted disk
illuminates the screen, but there�s a shadow in the center due to
the black disk. What is the diameter of the
completely dark part of this shadow?
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