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CWDC physics Exam template

If we have a balloon with a volume of 8 liters at the surface what would its volume be at 30m?
32 ltrs
24 ltrs
2 ltrs
2.6 ltrs
A diver breathes through 50 BAR of air in 40 minutes at the surface. If all other factors remain unchanged, how many BAR would the diver breathe in 40 minutes at 20m?
25 Bar
16.6 Bar
100 Bar
150 Bar
How much air must be pumped from the surface to fill a container with a volume of 100 Ltrs. The container is at a depth of 40m in salt water.
00 Ltrs
400 Ltrs
500 Ltrs
20 Ltrs
A balloon with a volume of 9 Litres is taken from a depth of 20 Metres to a depth of 10 Metres. What will the volume of the balloon be at this new depth if it is in salt water?
The same
13.5 Litres
6 Litres
18 Litres
If a diver takes 45 minutes to breathe through a tank of air at 5 Metres, how long will take to consume the same tank of air at 35 Metres?
40.5 mins
19 mins
15 mins
135 Mins
A diver consumes 10 PSI of air, every minute at 50 Metres, how many PSI of air will they consume per minute at a depth of 20 Metres? They are in salt water.
20 PSI
5 PSI
30 PSI
4 PSI
What is the difference in the density of the air a diver breathes at 50m compared to the surface?
4 times as dense
5 times as dense
The same
6 times as dense
At a depth of 10m approximately how much denser is the air a diver breathes compared to the surface?
The same
½ as dense
Twice as dense
Three times as dense
What is the difference in the density of the air a diver breathes at the surface compared to a depth of 30m?
4 times as dense
1/4 of the density
3 times as dense
1/3 of the density
How much denser is the air a diver breathes at 40m compared to the surface? (approximately)
4 times as dense
¼ of the density
5 times as dense
1/5of the density
How does the density of the air a diver breathes at a depth of 20m compare to the density of the air they breathe at a depth of 5m?
3/5 as dense
Twice as dense
6 Times as dense
1.5 Times as dense
The density of the air a diver breathes changes with pressure. A diver ascends from a depth of 20m to the surface. How does the pressure at the surface compare to a depth of 20m?
2 times less pressure
2 times more pressure
3 times less pressure
3 times more pressure
The density of the air a diver breathes changes with pressure. A diver ascends from a depth of 30m to a depth of 10m. How does the pressure at 10m compare to a depth of 30m?
1/2 the pressure
2 times more pressure
3 times less pressure
3 times more pressure
A Diver descends from a depth of 15m to a depth of 40m. How does the pressure at 40m compare to a depth of 15m?
1/2 the pressure
2 times more pressure
1.5 times more pressure
1.5 times less pressure
An object with a weight of 210 kg is in salt water. Its volume is 200 ltr. Will the object’s buoyancy be
Positive
Negative
Neutral
The answer cannot be determined
An object with a weight of 51 kg is in salt water. Its volume is 50 ltr. Will the object’s buoyancy be
Positive
Negative
Neutral
The answer cannot be determined
An object with a volume of 150 Litres is neutrally buoyant in fresh water. What is its weight?
146 Kg
150 Kg
155 KG
The answer cannot be determined
An object with a volume of 150 Litres is neutrally buoyant in SALT water. What is its weight?
146 Kg
150 Kg
155 Kg
The answer cannot be determined
An object with a weight of 150 Kg is neutrally buoyant in SALT water. What is its volume?
146 Kg
150 Kg
155 Kg
The answer cannot be determined
An object has a negative buoyancy of 20kg in salt water. Its volume is 75 Litres. What is its weight?
77 Kg
73 Kg
97 Kg
57 Kg
An object has a positive buoyancy of 20kg in salt water. Its volume is 75 Litres. What is its weight?
53 Kg
93 Kg
57 Kg
97 Kg
An object has a negative buoyancy of 20kg in salt water. Its weight is 75 kg. What is its volume?
55 Ltrs
53 Ltrs
73 Ltrs
58 Ltrs
An object has a positive buoyancy of 20kg in salt water. Its weight is 75 kg. What is its volume?
98 Ltrs
92 Ltrs
73 Ltrs
53 Ltrs
An object with a weight of 175 Kg is in salt water. It has a volume of 45 Litres. How much water would have to be displaced using a lifting device to bring this object to the surface?
130 Litres
170 Litres
125 Litres
129 Litres
An object with a weight of 325 Kg is in salt water. It has a displacement of 160 Litres. How much air would have to be added to a lifting device to bring this object to the surface?
156 Litres
160 Litres
165 Litres
170 Litres
An object with a weight of 175 Kg is in fresh water. It has a volume of 45 Litres. How much water would have to be displaced using a lifting device to bring this object to the surface?
130 Litres
170 Litres
125 Litres
129 Litres
If an object weighs 82kg in a freshwater lake and it displaces 93 liters of water, you would need to add 15 kgs of weight to make it 4kg negatively buoyant?
TRUE
FALSE
An object with a weight of 309 kg is in salt water. Its volume is 300 ltr. Will the object’s buoyancy be
Positive
Negative
Neutral
The answer cannot be determined
It takes 55 minutes to breathe through a tank of air at the surface. If all other factors remain unchanged, how long will it take to breathe through the same tank at 40m?
275 mins
55 mins
13 mins
11 mins
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