Monday, March 5, 2018

Wednesday, February 21, 2018

Pulley Weight LAB


Object
Weight in Air
Apparent weight in water
Buoyant force
Pulley weight in air
Length in String
1
10N
7N
3N
10N
44cm
2
4.2N
3.2N
1N
4N
40.5cm
3
2N
1.75N
0.25N
1.2N
40cm
4
1.9N
1.6N
0.3N
1N
37.5cm
5
0.9N
0.75N
0.15N
0.75N
37cm
6
0.4N
0.3N
0.1N
0.75N
32.5cm
7
0.15N
0.1N
0.05N
0.5N
31cm
8
0.1N
0.05N
0.05N
0.25N
28cm
9
0.05N
0.005N
0.045N
0.2N
24cm








Wednesday, February 14, 2018

Balloon Lab

1. Infer Why did you rub the balloon on your sweaterPredict what might have happened if you simply touched the balloon to your sweater instead of rubbing it.

ANS. Sweater holds electrons more loosely than the rubber balloonWhen the balloon comes in contact with the sweaterelectrons from the surface of the sweater transfer to the surface of the ballooncreating static charge on both objectsBecause the balloon gained electronsit has an unbalanced negative chargeBecause the sweater lost electronsit has an unbalanced positive chargeBoth insulators and conductors can be charged by contact.
2. Key Concept Why do you think the balloon interacted the way it did with your sweater and with the stream of water?
ANS. When you rub the balloon you touch the balloon to your hairs. when this happens a few electrons are transferred from the hair to the balloon. Rubbing repeats this millions of times, leaving the balloon charged.
The water starts off neutral, with the same amount of positive and negative charges. When you bring the charged balloon near to the water it pushes electrons away, leaving a positively charged area which is attracted to the balloon.

Wednesday, January 10, 2018

Vector Mapping

Direction (Lab)

Art room

First step: You take a Walk at 268 degree west straight for 11 steps

Second step: You turn up at East 82 then walk up 2 Storey of stair

Step 3: You take a West 267 for 13 steps

Step 4: Turn left at South 176 degree

Last step: walk 79 steps then you will reach your destination




Wednesday, November 15, 2017

Lab: Colour

Activity A:
 1. look at the monitor
 2. r+g, r+b, b+g
 3.  work with another group—put a color paddle over flashlight, shine on white paper—so a red, a green, and a blue
 Activity b
 3.  view white paper through color paddles—record results
 4.  view colored objects through color paddles
 5.  if you have time, do activity b—color by subtraction--


Filters
On paper
Filter only
Light
red
red


blue
blue


green
green


yellow
yellow


purple
purple


red+green
brown(yellow)
brown
yellow orange
red+blue
green
green

blue+green
blue green
blue green
turquoise
blue+green+red
black
black
white
purple+yellow
red
red





Wednesday, September 13, 2017

milk lab

questions

1)  why do we add salt to the ice?
      Salt decreases the temperature which helps it cools easier.
2)  why do we add the cookies and other things, only after the milk has frozen slightly?
      It will make the frozen milk tastier.
3)  what are two factors that affect the freezing you think?
      Ice and salt
4)  why do you need a bit of air in the bag?
      In my opinion, the air inside will be the space when milk vibrates and air can change the temperature inside easier.

Wednesday, June 7, 2017


Sample no.
Weight g.
Volume ml.
Density g/ml.
11
98
20
98.25
6
110.5
74
108.05
7

60
243.5
1
125
20
125.3
5(s)
45.5
13
45.7
5(b)
114.5
48
113.2
9
199.6
78
200
3
28
25
28
2
136.4
72
13.06

calculate the density of each of your mineral samples. How could you use the densities to identify the minerals?
If the densities are the same, the objects are the same. If the densities aren't same, the objects are different.
Key Concept Would density or color be more useful in identifying a particular mineral? Explain your answer.
I think density is more useful, it is more accurate becuase it will be the same ratio but one mineral can be more than one color.