Explain the working principle of a syringe based on atmospheric pressure.
Partial Vacuum inside the body of syringe, high pressure outside, this helps the syringe to draw the liquid into the body when we pull the piston
Oops!
Check
Okay!
Check
trap
No points!
Oops!
shark
Other team loses 20 points!
Okay!
rocket
Go to first place!
Okay!
thief
Give points!
5
10
15
20
25
banana
Go to last place!
Oops!
fairy
Take points!
5
10
15
20
25
fairy
Take points!
5
10
15
20
25
banana
Go to last place!
Oops!
15
Why is the balloon in the second test tube more bulged?
As the height of the water in test tube is more, the pressure increases thus inflating the balloon
Oops!
Check
Okay!
Check
15
Why is it easier to walk on soft sand with flat shoes instead of pointed heels?
The surface area of the heels is smaller, thus lower the area, higher the pressure. This makes it difficult to walk as the heels will penetrate into the sand.
Oops!
Check
Okay!
Check
15
A brick is kept in three different ways on a table as shown in given figure. The pressure exerted by the brick on the table will be ________ at position 1 (the leftmost position)
minimum
Oops!
Check
Okay!
Check
25
The pressure exerted by a red block is 10 Pa while the pressure exerted by a blue block is 4 Pa. If the number of blocks is doubled, what is the total pressure exerted? Explain your answer with reasons.
The pressure will double as the force is doubled but the area remains constant.
Oops!
Check
Okay!
Check
15
Following are the altitudes of three Canadian towns: Lake Louis - 5033 feet, Banff - 4540 feet, Kimberley - 3600 feet. What will happen to a balloon if you inflate it and drive from Lake Louis to Kimberley?
As the atmospheric pressure increases, from Lake Louis till Kimberley, due to the decrease in height from the sea level, the inflated balloon will shrink.
Oops!
Check
Okay!
Check
15
Why do you feel pain at the back of your ears when you wear a new mask with thin straps?
The thin straps reduce the surface in contact with the ear. This increases the pressure exerted by the strap behind the ear, thus causing pain.
Oops!
Check
Okay!
Check
banana
Go to last place!
Oops!
shark
Other team loses 20 points!
Okay!
fairy
Take points!
5
10
15
20
25
banana
Go to last place!
Oops!
15
It is much easier to burst an inflated balloon with a needle than your finger. Explain.
The surface area in contact with the balloon increases when using a finger. This decreases the pressure acting on it.
Oops!
Check
Okay!
Check
heart
Other team wins 20 points!
Oops!
magnet
Take 20 points!
Okay!
fairy
Take points!
5
10
15
20
25
thief
Give points!
5
10
15
20
25
15
Calculate the pressure exerted by the brick in the 2nd position if the weight of the block is 10N.
2000 Pa or 2 kPa
Oops!
Check
Okay!
Check
15
A container is filled with oil as shown in the figure. Compare the pressure of oil at the different points A, B, C.
Pressure at A < Pressure at B < Pressure at C
Oops!
Check
Okay!
Check
15
Volume of water in each vessel is shown above. Arrange them in order of decreasing pressure at the base of each vessel. Explain the reason.
B>D>A>C. The liquid pressure depends on the height of the liquid column and not on the total volume of liquid.
Oops!
Check
Okay!
Check
15
Two rods: A and B, having same weight and equal length have different thickness. Rod A is thinner while Rod B is thicker. They are held vertically on the surface of sand. Which one of them will sink more? Why?
Rod A will sink more as the area of contact is less which leads to increase in pressure.
