A precision yellow brass casting is to be produced that should have a final length of 0.2000 m at room temperature (23°C). The casting is produced by pouring liquid brass into the cavity of a mold and allowing the liquid to solidify. The melting temperature of the brass is 800°C. What should be the mold cavity length?
What will be an ideal response?
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A 20.0 cm wrench is used to generate a torque at a bolt. A force of 50 N is applied at the end of the wrench at an angle of 60.0 degrees to the wrench. The torque generated at the bolt is
A. 4.9 N•m. B. 5.7 N•m. C. 6.0 N•m. D. 7.5 N•m. E. 8.7 N•m.
Instructions: On occasion, the notation 
will be a shorthand notation for 
.
If vector
is added to vector , the result is 
. If is subtracted from 
, the result is 
. What is the direction of (to the nearest degree)?
A. 225°
B. 221°
C. 230°
D. 236°
E. 206°
An object's distance traveled as a function of time is shown in the graph. The graph shows
A. an object turning in a circle. B. an object with increasing speed. C. an object moving forward. D. an object experiencing an acceleration.
The crust of Mars is much thinner than the crust of Earth
a. True b. False Indicate whether the statement is true or false