An 80kg anchor is dropped in the water and plummets to the ocean floor with an observed acceleration of 3.0m/s
826560
3.0m/s is not an acceleration, it is a speed.\nIs the acceleration constant?
373459
The rain drops because of gravity.
1046911
it will fall straight down , but appear to fall at an angle if observed from the plane
795902
no.\n\nit's a matter of physics. the hole was alreay made and filling. nothing could have been done to make the boat float longer.
888539
its impulse change in momentum
128500
The object will follow a parabolic trajectory to the earth, as observed from outside the plane.  On the plane, it will appear to fall straight down in your (moving) frame of reference.  Air resistance will retard this motion, but it's magnitude depends on the drag coefficient of the object dropped and the medium in which it is falling.
775169
Mostly with radar (light) and sonar (sound), by bouncing the waces off of the ocean's floor.
154782
I'm pretty sure that it is an upward force because the buoyant force would be the force of the liquid, right? The boat(example of an object) would be pushed downward because of gravity, and the water would push back upward. It would be kind of like the ground pushing back upward on your feet.
488291
Water at sea level weighs about 8.3 pounds per gallon.
645377
An earthquake on the sea floor of the ocean caused a landslide. It's hard to believe, but the rocks and debris in this landslide move at over 100 MPH, even under water. \n\nThis landslide displaced the water above it, causing a valley in the watter, from which the huge waves were formed, probably 30 ft high. \n\nIf you've ever done a belly flop into the water from a high-diving board, you know that water acts more like a solid at high speed. So with the tsunami wave rushing at the land at high speed, it's like a freight train crashing into the shore. \n\nTragically, it's not the wave itself that kills most people. Although the wave does the most destruction, most of the "freight train" effect is dissipated in the first block from shore, but the water keeps going inland. It is the rushing water backward into the sea that drags people and animals and anything lose with it, and they drown in a hurrican of water.
327534
I don't believe so. That's why it's called 'terminal'. The surface of water when hit at high speeds isn't any 'softer' than actual ground. It just looks more pretty.
774748
Impulse = change in momentum\n\nHenri falls 12 meters. The time it takes him to fall is t.\n\n12 = (1/2)gt^2 = (0.5)(9.8)t^2\n\nt = SQRT [ 12/(0.5)(9.8)] = 1.56 seconds\n\nIn this time, he will reach a speed of gt or (9.8)(1.56) = 15.3 m/sec\n\nAssuming he weighs 100 kg we can now calculate his initial momentum which is mv or (100)(15.3) or 1520 m-kg/sec\n\nHis final momentum is zero so the impulse from the water is just 1520 m-kg/sec
432420
jeez - that sounds a demanding course.\nmake a paper boat in the style of an old galleon and stick a coin in the bottom. It will stop it falling over and demonstrate how the galleon can transport gold without sinking.\nThat should give you an E instead of F.
206339
You could ram the iceberg head on. If you do that, then the ship wouldn't sink, because the water would only get in the first, or maybe second watertight compartment, rather than five compartments like it did happen.
361918
it won't sink, The Channel Tunnel ties the small island to main land and helps it float! =)\n\nhttp://en.wikipedia.org/wiki/Channel_Tunnel
689832
The object must be less dense than the fluid to float, and more dense to sink.  If it is exactly equal density, then it can be suspended.
753316
It rose from the ground.