4. What features are carred into a bullet's exterior by the inside of the barrel when it is fred. How can this help in forensic examinations?Water cools of slower than sand True FalseHow can adhesion be observed in the science lab steel pins can float on water in a petri dish water droplets form beads water curves to form a meniscus in a graduated cylinderof 4001 4. Acrane is capable of doing 1.5times 10^5J of work in 10 seconds. What the power of the crane in waits?5. A person throws a golf ball vertically upward. The ball returns to the same level after 2.6 S. a. How long did the ball rise? Explain your answer. [1] b. Determine the initial velocity of the ball. [2] c. How long would the ball remain in flight on Mars, where g is 3.7m/s^2 and was given the same initial velocity. [2]PREV 142143144145146147148149150 NEXT
