https://padlet.com/gregorywong/3df8s1rqdmcqsuhu Pressure, Dynamics en-us 2021-06-03 11:34:30 UTC 2023-02-09 04:56:41 UTC hello@padlet.com https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582229012 P1= 76cmHg + 30cmHg
     =106cmHg
P2=76cmHg
P3=76cmHg - 15cmHg
=61cmHg]]> 2021-06-03 11:48:01 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582229012 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582229285 P1:
76+30=106cmHg
P2:
76-20=56cmHg
P3:
76-15=61cmHg]]> 2021-06-03 11:48:14 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582229285 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582233441 P1: 76 + 30 = 106cm Hg
P2: 76cm Hg
P3: 76 - 15 = 61cm Hg]]> 2021-06-03 11:51:17 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582233441 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582233523 Pressure at P1: 30+76=106cmHg
Pressure at P2: 76cmHg
Pressure at P3: 76-15=61cmHg]]> 2021-06-03 11:51:20 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582233523 oklolzzzzzz https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582233527 a) X1 = 106 cmHg
X2 = 76 cmHg
X3 = 61 cmHg]]> 2021-06-03 11:51:20 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582233527 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582234021 Pressure at P1: 46cmHg
P2: 56cmHg
P3: 61Hg]]> 2021-06-03 11:51:39 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582234021 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582236741 a) x1 = 76cmHg + 30cmHg = 106cmHg
x2 = 76cmHg
x3 - 76 -15= 61cmHg]]> 2021-06-03 11:53:43 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582236741 oklolzzzzzz https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582327453 a)
A = 76 cmHg
B = 80 cmHg
C = 86 cmHg
D = B = 80 cmHg

b)
A = 1.03 x 10^5
B = 1.08 x 10^5
C = 1.17 x 10^5
D = 1.08 x 10^5

C) 1.08 x 10^5]]> 2021-06-03 12:42:43 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582327453 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582327808 a)
A: 76 cm Hg
B: 76 + 4 = 80 cm Hg
C: 76 + 4 + 6 = 86 cm Hg
D: since pressure at B is same as pressure at D,
80 cm Hg

b) by using P =hpg,
A: 1.03x10^5 Pa
B:  1.03x10^5 + (0.04 x 1.36 x 10^4 x 10) = 1.08x10^5 Pa
C: 1.03x10^5 + (0.1 x 1.36 x 10^4 x 10) = 1.17 x 10^5 Pa
D: 1.08x10^5 Pa

c)
1.08x10^5 Pa

]]> 2021-06-03 12:42:52 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582327808 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582331771 a) a=76cmHg
b= 80 cmHg
c= 90cmHg
D= 80cmHg]]> 2021-06-03 12:44:26 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582331771 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582338204 a) A=76cmHg
     B=80cmHg
     C=86cmHg
     D=80cmHg
b)1.03x10^5]]> 2021-06-03 12:47:01 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582338204 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582340848 a) A:76cmHg
     B: 76+4=80cmHg
     C: 76+4+6=86cmHg
     D: 80cmHg
b) A: 1.03x10^5Pa
B:

]]> 2021-06-03 12:48:04 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582340848 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582346087 a)
A:76
B:80
C:86
D:80

]]> 2021-06-03 12:50:17 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582346087 oklolzzzzzz https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582372821 a) 
A = 0 cmHg
B = 18 cmHg
C = 76 cmHg
D = 101 cmHg
E = 126 cmHg

b) 
(13600)(10)(0.76) = 1.03 x 10^5 Pa

c) there is no change as only changes to density height and gravitational force affects liquid pressure, as shown in the equation P = hpg]]> 2021-06-03 13:00:41 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582372821 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582372884 (a)
A: 0cmHg
B: 76-58=18cmHg
C: 76cmHg
D: 76+25=101cmHg
E: 76+50=126cmHg

(b) 1.03x10^5 Pa
(c) The pressure will decrease because the height decreases]]> 2021-06-03 13:00:43 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582372884 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582372936 a)A=0cmHg
    B=18cmHg
    C=76cmHg
    D= 101cmHg
    E=126cmHg
b)1.36x10^4x0.76x10
  =1.03x10^5Pa
c)There will be no change since the diameter doesn't make a difference in the barometer.

]]> 2021-06-03 13:00:44 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582372936 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582373972 Q1a)
A: 0cmHg
B:76-58=18cmHg
C:58+18=76cmHg
D:76+25=101cmHg
E:76+50=126cmHg
b)
1.03x10*5 Pa
c)There will be no change
Q2a)
76-55=21cmHg
bi)
Height of mercury drops
bii)
Pressure is constant
Q3a)
76+5=81cmHg
b)
P=0.81x(1.36x10*4)x10
   =110.16x10*3
Q4


]]> 2021-06-03 13:01:09 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582373972 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582376808 Q1a) 
A: 0 cm Hg
B: 76 - 58 = 18 cm Hg
C: 76 cm Hg
D: 76 + 25 = 101 cm Hg
E: 76 + 50 = 126 cm Hg

b)
1.03x10^5 Pa

c)
There will be no change as pressure is dependent on depth, and not width. Hence, changing the diameter does not affect any values  obtained from the barometer.

Q2a)
76 - 55 = 21 cm Hg 

b) 
i)The height of the mercury column drops.
ii)The pressure remains the same.

Q3a) 
76 + 5 = 81 cm Hg

b)


Q4
by comparing total pressure, 
density of x = 667 kgm^-3 ]]> 2021-06-03 13:02:18 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582376808 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582377392 a: 76cmHg
b:80cmHg
c:86cmHg
d:80cmHg]]> 2021-06-03 13:02:32 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582377392 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582379733 (a)  A: 0cmHg
b: 76-58=18cmHg
c: 58+18=76cmHg
d: 25+58+18= 101cmHg
e: 50+58+18=126cmHg

(b): 1.36x10^4x(0.76x10)=103360=
1.03x10^5Pa
(c) No change]]> 2021-06-03 13:03:27 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582379733 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582381252 a)A= 0cmHg
B= 18cmHg
C=76cmHg
D=101cmHg
E= 126cmHg
b)1.36x10^4x0.76x10=1.03x10^5Pa
c) There will be no changes as the diameter does not matter, only the density of the liquid determines the height.

]]> 2021-06-03 13:04:00 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582381252 oklolzzzzzz https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582413451 a) 76 - 55 = 21 cmHg

b)
i) The height will decrease as the decrease in atmospheric pressure is lesser. 
ii) It will not change, it is a vacuum and its pressure will remain at 0 Pa.

 ]]> 2021-06-03 13:15:36 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582413451 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582417396 a)76cmHg - 55cmHg
  =21cmHg
b) (i)The height will decrease
    (ii)The pressure will remain the same at 0 Pa
c)

]]> 2021-06-03 13:17:00 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582417396 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582420599 a)76-55=21
b) 
i)the height will decrease as the atmospheric pressure changes
ii)the pressure in the space above the mercury will remain the same as it is a vacuum.

]]> 2021-06-03 13:18:07 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582420599 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582427005 (a) 76-55=21cmHg
(b)(i): The height in the mercury column will decrease.
(ii): The pressure will remain the same.]]> 2021-06-03 13:20:15 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1582427005 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1587809051 3(a). 81cmHg
(b). 81cmHg
4. 20kg/m3?]]> 2021-06-06 10:12:41 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1587809051 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1589515591 3.(a) 76+5 =81cmHg
  (b) 0.81×1.36×10⁴×10=1.10×10⁵ (3sf)
4. 667 kg/m³ (3sf)

]]> 2021-06-07 09:39:02 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1589515591 oklolzzzzzz https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598303167 a)76+5 = 81 cmHg

b) (13600)(0.81)(10) = 1.1 x 10^5

]]> 2021-06-10 11:42:44 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598303167 oklolzzzzzz https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598314057 (1000)(10)(0.06) = 600
total pressure at a = total pressure at b
600 + atm = (0.09)(10)(p) + atm
600 = 0.9p
density is 6.67 x 10^2 = 667 Kg/m^3]]> 2021-06-10 11:50:52 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598314057 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598318376 a) 76 + 5 = 81 cm Hg
b) 6.8 times 10^5  

]]> 2021-06-10 11:53:29 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598318376 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598321346

]]> 2021-06-10 11:55:27 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598321346 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598323026 a)76+5=81cmHg
b)hpg
=0.05 x 13600 x 10 
=6800Pa]]> 2021-06-10 11:56:43 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598323026 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598330660 6cm H2O=9cm liquid X
pressure
0.06 x 1000 x 10=0.09 x density x 10
density=666.666666...
             =6.67 x10^2 (3s.f.)
=667 kgm^-3]]> 2021-06-10 12:01:37 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598330660 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598383520 1.D (correct)
2.C (wrong)
3.D (correct)
4.B (correct)
5.B (correct)
6.B (correct)
7.B (correct)
8.C (correct)
9.A (wrong)
10.B (correct)]]> 2021-06-10 12:30:41 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598383520 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598385747 1. D
2. dD
3. D
4.B
5. B
6. B
7. B
8. cC
9. B
10. B]]> 2021-06-10 12:31:43 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598385747 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598388237 1) D
2) C
3) D
4) i don't know :(
5) B
6) B
7) B
8) B
9) B
10) B

]]> 2021-06-10 12:32:53 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598388237 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598394185 1.D
2.C X(D)
3.A X(D)
4.D X(B)
5.B
6.B
7.B
8.B X(C)
9.B
10.B]]> 2021-06-10 12:35:39 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598394185 oklolzzzzzz https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598399261 1. D
2. C x (D)
3. D
4. B
5. B
6. B
7. B
8. C
9. B
10. B]]> 2021-06-10 12:37:57 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598399261 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598408353 1. D
2. C (D)
3. D
4. B
5. B
6. A (B)
7. B
8. C
9. B
10. B]]> 2021-06-10 12:42:04 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598408353 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598418928 Q1 D
Q2 C
Q3 B
Q4 B
Q5 C
Q6 B
Q7 B
Q8 B
Q9 D
Q10 B]]> 2021-06-10 12:46:51 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598418928 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598456651 Q1]]> 2021-06-10 13:02:02 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598456651 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598512536 2021-06-10 13:22:32 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598512536 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598517577 2021-06-10 13:24:19 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598517577 oklolzzzzzz https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598519413 2021-06-10 13:25:01 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598519413 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598521292 2021-06-10 13:25:42 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598521292 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598524421 2021-06-10 13:26:53 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598524421 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598530179 2021-06-10 13:28:58 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598530179 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598533582 2021-06-10 13:30:10 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598533582 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598535799 2021-06-10 13:31:00 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598535799 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598537832 2021-06-10 13:31:38 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598537832 oklolzzzzzz https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598539523 2021-06-10 13:32:13 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1598539523 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612102506 (i) 20N
(ii) f-friction=ma
20-f=1x4
20-f=4
f=16N]]> 2021-06-17 12:21:21 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612102506 oklolzzzzzz https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612102794 i) Constant velocity = no acceleration
 Forward Force = Friction
Friction is 20N

ii) 20 N - Friction = 1 x 4
20N - 4N = Friction
Friction = 16N]]> 2021-06-17 12:21:30 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612102794 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612103116 (i)Since it is constant acceleration, the friction should equal to applied force, which is 20N
(ii)F=ma
     F=1x4
       =4N
Therefore,
20N-4N=16N]]> 2021-06-17 12:21:45 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612103116 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612103354 (i) 20N
(ii) 16N]]> 2021-06-17 12:21:56 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612103354 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612103693 i)20N
ii)16N


]]> 2021-06-17 12:22:09 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612103693 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612105826 I) 20N
II) 16N]]> 2021-06-17 12:23:40 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612105826 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612109045 i) 20N
ii) 16N]]> 2021-06-17 12:25:58 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612109045 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612128220 2021-06-17 12:37:45 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612128220 oklolzzzzzz https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612129677 (60)(10) - resistance = (-20)(60)
600N - resistance = -1200N
resistance = 1800N
water resistance = 1800N

]]> 2021-06-17 12:38:37 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612129677 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612134100 f-friction=ma
600-water resistance=60x(-20)
600-water resistance=-1200
water resistance=1800N

]]> 2021-06-17 12:41:16 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612134100 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612134838 1800N]]> 2021-06-17 12:41:41 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612134838 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612138716 2021-06-17 12:43:45 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612138716 https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612139586 force when entering water=60x(-20)=-1200N
60x10=600N
60N+1200N=1800N]]> 2021-06-17 12:44:15 UTC https://padlet.com/gregorywong/3df8s1rqdmcqsuhu/wish/1612139586