A rifle is aimed horizontally toward the center of a target 0.10 km away, but the bullet strikes 10 cm below the center. Calculate the velocity of the bullet just as it emerges from the rifle
700 m/s
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An ant crawls in a straight line at a constant speed of 0.24 m/s for a distance of 3.0 m, beginning in the corner of a square classroom. It then turns exactly 90 degrees to the right, and proceeds an additional 4.0 m with a constant speed of 0.44 m/s, reaching the other corner of the same wall from which it began. What was the average speed for the full trip from corner to corner?
A. 0.34 m/s B. 0.30 m/s C. 0.21 m/s D. 0.23 m/s E. 0.32 m/s
A steel bracket ABC (EI 5 4.2 3 106 N # m2) with span length L 5 4.5 m and height H 5 2 m is subjected to load P 5 15 kN at C. The maximum rotation of joint B is approximately:
(A) 0.18
(B) 0.38
(C) 0.68
(D) 0.98
The coefficient of linear expansion for aluminum is 24. × 10-6K-1. What is the coefficient in units of C°-1?
What will be an ideal response?
Which of the following devices make use of the photoelectric effect?
a. digital cameras b. photocopiers c. laser printers d. solar cells e. all of the above