A 5.25-g bullet is fired into a 360-g block of wood suspended as a ballistic pendulum. The combined mass swings up to a height of 8.75 cm. What was the magnitude of the momentum of the combined mass immediately after the collision?
a. 0.338 kg·m/s
b. 0.471 kg·m/s
c. 0.478 kg·m/s
d. 0.626 kg·m/s
e. 0.239 kg·m/s
c
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A.A B.B C.C D.D E. Toward the viewer F. Away from the viewer T. The field is zero.
During an adiabatic compression, a volume of air decreases to 1/4 its original size. Calculate its final pressure if its original pressure was 1 atm. (Assume the air behaves like an ideal gas with ? = 1.4.)
A. 7.0 atm B. 5.6 atm C. 3.5 atm D. 2.2 atm E. 0.14 atm
A solid shaft of 1020 steel with an outside radius of 1.002 cm is to be inserted inside a hollow 1020 steel shaft with an inside radius of 1.000 cm. This is to be accomplished by heating the hollow shaft sufficiently so that the solid shaft can be inserted into the hollow shaft with a radial clearance of 0.002 cm. When the two shafts are brought to room temperature, they will be bonded together as a single unit. This process is called a shrink fit. To what temperature must the hollow shaft be heated for this process, assuming that the solid shaft is at 300 K?
What will be an ideal response?
How might you separate a mixture of sand and salt?
A) with tweezers and a magnifying glass B) just add water C) heat the mixture until one of the components melts D) Two of the above answers are reasonable.