Two non zero vectors D and E have precisely equal magnitudes. For the magnitude of D+E to be 3 times larger than the magnitude of D-E, what must be the angle between D and E?
Anonymous Quiz
22%
30ΒΊ
48%
37ΒΊ
30%
53ΒΊ
0%
60ΒΊ
The magnitudes of two vectors A and B are 12 units and 5 units respectively. Which one of the following is not the possible value for the magnitude of the resultant vector A+B?
Anonymous Quiz
35%
60 units
41%
17 units
19%
14 units
5%
7 units
What is the vector product A Γ B of two vectors, A=7i+4j-8k and B=3i-2j+5k
Anonymous Quiz
13%
36i+11j-2k
56%
4i-59j-26k
21%
4i+59j+26k
10%
0
What is the minimum number of unequal vectors that can produce zero resultant?
Anonymous Quiz
62%
2
25%
3
12%
4
2%
5
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It's quiz time!
Do you want questions on fluid statics?πππ’π³
Put reactions if you want me to post them!
Do you want questions on fluid statics?πππ’π³
Put reactions if you want me to post them!
At sea level, water boils at 100ΒΊC, but at higher altitudes, it boils at 75ΒΊC. Why is that?
Anonymous Quiz
12%
The sun heats water faster at higher altitudes
41%
There is more air pressure at higher altitudes
43%
There is less air pressure at higher altitudes
4%
The gravitational pull is stronger at sea level
If mercury is toxic and needs to be handled carefully, why not use a water barometer instead?
Anonymous Quiz
17%
Water is too dense
38%
Water is reactive
13%
Water is not transparent
33%
A water barometer would need to be too tall
An object weighs 7.0 N in air and 4.0 N in water. What is the buoyant force, and does it float?
Anonymous Quiz
17%
4.0 N, No
23%
7.0 N, Yes
30%
3.0 N, No
30%
3.0 N, Yes
Lead is denser than aluminium. If equal volumes of both are immersed in water, how do their buoyant forces compare?
buoyant force
force
buoyant force
force
Anonymous Quiz
13%
Aluminium experiences more
29%
Lead experiences more buoyant
45%
Both experience the same buoyant force
13%
Depends on their masses
What is the pressure at a depth of 4 m in water? (Take acceleration due to gravity= 9.8m/sΒ²)
Anonymous Quiz
10%
400 Pa
64%
39200 Pa
18%
49000 Pa
8%
4010 Pa
At what depth in sea water is the total pressure 202 kPa? (Assume atmospheric pressure is 101 kPa)
Anonymous Quiz
18%
10.3 m
27%
5.0 m
32%
10.0 m
23%
101 m
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