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A block of wood with length = 2.5 m, width = 0.5 m and height = 0.4 m. The density of water
is 1000 kg/m3. If the block is placed in the water, what is the buoyant force ?
A ship weighing 46 328 tons is lowered into water. What weight of water would it
displace?
An astronaut sent on a mission to a new planet where the gravitational field strength near the surface is 3.9 N/kg. Using actual mass, find the weight and mass of the astronaut (a) on earth (b) on the new planet and (c) in space.
An aluminum cylinder has a volume of 60ml. Calculate the buoyant force that will be exerted on the cylinder when it is interested in
A. Water
B. Alcohol (density=0.78g/ml)
A balloon has a total volume of 6,000 cm3
and a mass of 3.5 g. Find the buoyant force of the
air on it, in dyne unit. Note that 1 dyne = 1 g.cm/s2
(Density of air = 0.00129 g/cm3)
A 1 kilogram object is located at a distance of 6.4x10 to the 6th m from the center of a larger object whose mass is 6 by 10 to the 24th kg. What is the force acting between the objects?
At the moment of Transit a clock running on universal time ( UT) read 03h 16min 24s . At the previous midnight the sifereal time was 14 h 38 min 54s . Calculate the Right Ascension of the star
A star is observed to croos the meridian (due south) at an elevation of 34° as seen from an observation sited at latitude 42° north.what is the declination of the star
Astronauts in training are subjected to extreme acceleration forces by the centripetal forces in a giant centrifuge. The radius of the centrifuge is approximately 5 m.
a) Calculate the approximate centripetal force on an astronaut of mass 80 kg if the centrifuge rotates once every 2 s.
b) Approximately how many times greater than the astronauts weight is this force?
Astronauts in training are subjected to extreme acceleration forces by the centripetal forces in a giant centrifuge. The radius of the centrifuge is approximately 5 m.
a) Calculate the approximate centripetal force on an astronaut of mass 80 kg if the centrifuge rotates once every 2 s.
b) Approximately how many times greater than the astronauts
weight is this force?
