Work done by the force of gravity
A 2800 kg space vehicle, initially at rest, falls vertically from a height of 3000 km above the Earth's surface.
Determine how much work is done by the force of gravity in bringing the vehicle to the Earth's surface.
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A hydraulic dredge is used to dredge sand from a river bottom. Estimate the thrust necessary to keep the boat stationary. Assume the specific gravity of the sand/water mixture is SG=1.2.
Neglecting gravity, estimate the average force of air resistance during a pitch, if the distance between the plate and the pitcher is about 15m .
A TLC plate showed two spots with Rf values of 0.25 and 0.26. The plate was removed from the developing chamber, the residual solvent was allowed to evaporate from the plate, and then the plate was returned to the developing chamber.
After the reaction is complete, the excess MnO2 is collected by filtration, washed, allowed to dry, and is then weighed; 0.3521g are recovered.
A 2800 kg space vehicle, initially at rest, falls vertically from a height of 3000 km above the Earth's surface. Determine how much work is done by the force of gravity in bringing the vehicle to the Earth's surface.
At the instant when the water depth is 0.6 m, the flow rate from the tank is observed to be 4 kg/s. Determine the rate of change of water level at this instant.
Other animals have similarly adapted to using small molecules as allosteric effectors to encourage hemoglobin to release its oxygen. Whereas humans use 2,3-BPG and crocodiles use HCO3-, birds use myo-inositol pentaphosphate (IP5) and fish use ATP
Which cup will be the most stable on an unstable surface such as a pillow, a bed, or a couch? Cup with tissue paperWhich cup will most easily hold the load of a book or a folder?
In order to create an engineered human hemoglobin molecule that had the same bicarbonate binding properties as crocodile hemoglobin.
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