You are shipwrecked and floating in the middle of the ocean on a raft. Your cargo on the raft includes a treasure chest full of gold that you found before your ship sank, and the raft is just barely afloat. To keep you floating as high as possible in the water, should you (a) leave the treasure chest on top of the raft, (b) secure the treasure chest to the underside of the raft, or (c) hang the treasure chest in the water with a rope attached to the raft? (Assume throwing the treasure chest overboard is not an option you wish to consider.)
You are shipwrecked and floating in the middle of the ocean on a raft. Your cargo on the raft includes a treasure chest full of gold that you found before your ship sank, and the raft is just barely afloat. To keep you floating as high as possible in the water, should you (a) leave the treasure chest on top of the raft, (b) secure the treasure chest to the underside of the raft, or (c) hang the treasure chest in the water with a rope attached to the raft? (Assume throwing the treasure chest overboard is not an option you wish to consider.)
You are shipwrecked and floating in the middle of the ocean on a raft. Your cargo on the raft includes a treasure chest full of gold that you found before your ship sank, and the raft is just barely afloat. To keep you floating as high as possible in the water, should you (a) leave the treasure chest on top of the raft, (b) secure the treasure chest to the underside of the raft, or (c) hang the treasure chest in the water with a rope attached to the raft? (Assume throwing the treasure chest overboard is not an option you wish to consider.)
On 23 March 2021 the giant container ship "Ever Given", under strong winds,
swivelled round to become wedged between the banks of the Suez Canal.
Given that the mass of the ship was 200,000 tonnes, that its length was 400m,
its width was 59m, and that the density of the water in the Canal was 1009
kg/m³. The depth of the Suez Canal is 24.m. Determine whether the ship
continues to float or not.
Consider a spherical bacterium, with radius 1.85 um, falling in water at 20° C.
▷ A Find the terminal speed of the spherical bacterium in meters per second, ignoring the buoyant force on the bacterium and assuming Stokes' law for the
viscous force. You will first need to note that the drag force is equal to the weight at terminal velocity. Take the density of the bacterium to be 1.2 x 10³ kg/m³.
The viscosity of water at 20 °C is 1.002 x 10-3 kg/m-s and the density is 998 kg/m³.
y =
7
8
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sin()
cotan()
cos()
asin()
atan() acotan
tan() T C
acos() E
4
6
sinh()
1
2 3
cotanh()
+
0
cosh() tanh()
Ⓒ Degrees Radians
END
CLEAR
VO BACKSPACE
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On a distant planet the acceleration due to gravity is less than it is on
Earth. Would you float more easily in water on this planet than on Earth?
Justify your answer.
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