Posted by: **magicalrubidium** | July 17, 2008

## Chem and Physics HW

CHEM:

1) S in sodium sulfite

2) Mn in potassium permanganate

3) N in calcium nitrate

4) N in nitrogen dioxide

5) S in hydrogen thiosulfate

6) S in S8

7) Cr in Na2CrO4

8 ) V in K3V5O14

9) C in C2H6O

10) P in P2O7^-4

PHYSICS

Giancoli 5th Edition, p. 72, 3-20, 3-22, 3-28, 3-34, 3-35. Kung sino may alam nung questions dito, pakipost na lang please kasi 3rd edition lang yung meron ako. D:

edit:

**20. **A diver running 1.6m/s dives out horizontally from the edge of a vertical cliff and reaches the water below 3.0s later. How high was the cliff and how far form its base did the diver hit the water?

**22.** Romeo is chucking pebbles gently up to Juliet’s window, and he wants the pebbles to hit the window with only a horizontal component of velocity. He is standing at the edge of a rose garden 8.0m below her window and 9.0m from the base of the wall. How fast are the pebbles going when they hit her window?

**28.** A shot-putter throws the shot with an initial speed of 14m/s at a 40 degree angle to the horizontal. Calculate the horizontal distance traveled by the shot if it leaves the athlete’s hand at a height of 2.2m above the ground.

**34.** A projectile is fired with an initial speed of 40.0m/s. Plot on the graph paper its trajectory for initial projection angles of theta = 15, 30, 45, 60, 75, and 90 degrees. Plot at least 10 points for each curve.

**35.** A projectile is fired with an initial speed of 75.2m/s at an angle of 34.5 degrees above the horizontal on a long flat firing range. Determine:

- the maximum height reached by the projectile
- the total time in the air
- the total horizontal distance covered (that is in the range)
- the velocity of the projectile 1.5s after firing

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