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Question: (a) Estimate a thermal velocity for an iron atom at its melting temperature. Suppose an iron atom in the liquid must travel a distance of 1 Å to reach a suitable site on a growing crystal surface. If the growth rate of the solid into the liquid is 1 cm/min, what fraction of iron atoms attach to the surface sites?
(b) Why is this fraction so low? (Hint: You may challenge the assumption of a 1 Å travel.) Why is this fraction even lower if the undercooling is smaller, and the growth rate is slower?
Calculate the elecrtic field at one corner of a square 1m on aside if the other three corners have 2micro C charges. Writeyour answers in vector form and also magnitude, angle format
A 12.0 g rifle bullet is fired with a speed of 740 m/s into a ballistic pendulum with a mass of 8.00 kg, suspended from a light and long cord. Compute the max height through which the block would rise
Two converging lenses, each of focal length 14.5 cm, are placed 39.1 cm apart, and an object is placed 29.2 cm in front of the first. What is the magnifcation of the system
A highway curve with a radius of 555 m is banked properly for the car travelling 150 km/h. If a 1650 kg Porshe 928 S rounds the curve at 220 km/h, how much sideways force must the tires exert against the road if the car does not skid.
After a 0.250-kg rubber ball is dropped from a height of 1.80 m, it bounces off a concrete floor and rebounds to a height of 1.20 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. magnitude? direction?
A dab of mud (mass 0.1 kg, and sitting 0.25 m from the center) flies off a horizontal spinning wheel when the wheel takes 1 s to complete one circuit. How large is the friction force between the mud and the wheel?
The burner on an electric stove has a power output of 20 kW. A 810g stainless steel tea kettle is filled with 20C water and placed on the already hot burner. If it takes 3.3min for the water to reach a boil, what volume of water, in cm3, was in the k..
the electrons in the beam of a television tube have a kinetic energy of 2.86 x 10-15 j. initially the electrons move
Two tiny conducting spheres are identical and carry charges of -23.9C and +40.6C. They are separated by a distance of 3.63 cm. (a) what is the magnitude of the force that each sphere experiences?
How does an electroscope work? I have a homework problem that is asking me to sketch an arrangement of excess positive or negative charges in various regions on a picture of an electroscope (that is positiv charged) to show what happens to the charg..
A 50-kg pilot comes out of a vertical dive in a circular arcsuch that at the bottom of the arc her upward acceleration is 8.5g. what is the radius of the circular arc
Acharge of q= +7.50μC is located in an electric field. The x andy components of the electric field are Ex = 6.00 * 10^3 N/C and Ey= 8.00x 10^3 N/C, respectively, What is the magnitude of the force on the charge
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