12 (b) The apparatus is then set up as shown in Fig. 1.3.
The rule is at a small angle to the bench.
2
metre rule
hook
zero mark
bench
Fig. 1.3
A student measures the length of the stretched spring and obtains the result
12 = . 4.4 cm.
(i) He then places a metal block X with its centre at the 40.0 cm mark on the rule.
Explain briefly how the student can make sure that the block is in the correct
position. You may wish to use a diagram.

When measuring volume, why is it important to use the correct tools and units to attain the greatest accuracy? use specific examples from the lab to support your answer. (5 points)

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward

Astudent weighing 700 n climbs at constant speed to the top of an 8 m vertical rope in 10 s. the average power expended by the student to overcome gravity is most nearly