Amity University 2006 Diploma Information Technology iit jee with answers - Question Paper

O2 concentration
Fe3+ concentration
S2- concentration
pH
Passage five

The Sun's path from sunrise to sunset varies with the time of year. A learner performed the subsequent experiments on 3 clear, sunny days at three- or four-month intervals throughout the course of a year to study the path of the Sun through the sky.

Experiment one

At a chosen Northern Hemisphere location, the learner placed a stick vertically into the ground so that one meter of its length was left above ground. The learner knew that the length of the shadow was related to the height of the Sun above the horizon and that the shadow would point away from the direction of the Sun. The length in meters (m) and direction of the shadow cast by the stick were measured 1 hour after sunrise (Shadow A), at mid-morning (B), at noon (C), at mid-afternoon (D), and 1 hour before sunset (E) on every of the 3 days. The direction of every shadow was determined by placing a magnetic compass at the base of the stick and aligning the north arrow with the north mark on the compass. The direction of every shadow was then determined by a comparison with the compass face markings. The outcomes are recorded in Table 1.

Table 1:
Shadow Day one Day two Day three
Length
(m) Shadow
direction Length
(m) Shadow
direction Length
(m) Shadow
direction
A 5.0 SW 8.6 NW 6.8 W
B 1.2 W 2.9 NNW 1.7 NW
C 0.3 N 2.3 N 0.9 N
D 1.2 E 3.0 NNE 1.8 NE
E 5.0 SE 8.6 NE 6.9 E


Experiment two

The subsequent year, the learner repeated Experiment one at a chosen location in the Southern Hemisphere. The outcomes are in Table 2.

Table 2:
Shadow Day one Day two Day three
Length
(m) Shadow
direction Length
(m) Shadow
direction Length
(m) Shadow
direction
A 9.0 SW 5.0 NW 6.9 W
B 3.2 SSW 1.1 W 1.8 SW
C 2.5 S 0.3 S 1.0 S
D 3.2 SSE 1.1 E 1.8 SE
E 9.1 SE 5.0 NE 6.9 E


Q. 21 Which of the subsequent was a constant in both experiments?


Length of vertical stick exposed
Shadow direction
Day of the year
Shadow length
Q. 22 If the experiments were repeated after pounding the stick farther into the ground so that only 0.5 m was exposed, how would this affect the shadow lengths?


They would be twice as long as those in the original experiments.
They would be one-and-one-half times as long as those in the original experiments.
They would be one-half as long as those in the original experiments.

Earning:   Approval pending.