Three balloons are inflated to the same size. The three balloons are submerged in buckets filled with ice water, tap water and w
2 answers:
Explanation:
Charles law states that 'at constant pressure Volume occupied by the gas is directly proportional to the Temperature in Kelvins'.
( At constant pressure)
So, when inflated balloon is:
- Submerged in water heated upto 65°C the volume of the of air inside the balloon will increase and so is in the size of balloon.Hence, size will increase.
- Submerged in ice water,the temperature in the water is less that of the temperature of gas inside the balloon.So, with decrease in temperature the volume of the balloon will also decrease.
- Submerged in normal water as there will be not that much temperature difference in water temperature and gas inside the balloon .Hence,no appreciable change in size of balloon will be observed.
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Answer:
Explanation:
We are given that
We have to find the angle of refraction.
By Snell's law
Substitute the values
Hence, the angle mad by refracted ray in to the glass with normal=
Answer:
a)V=18.35 m/s (South -East)
b) t =7.41 m/s
c)D= 66.70 m
Explanation:
Given that
Velocity of boat in east direction = 16 m/s
Velocity of river = 9 m/s
a)The resultant velocity V
V=18.35 m/s (South -East)
b)
We know that
Distance = Velocity x time
Lets t time takes to cross the river
136 = 18.35 x t
t =7.41 m/s
c)
The distance covered downstream
We know that
Distance = Velocity x time
t= 7.41 s
D= 7.41 x 9 m
D= 66.70 m