Suppose you have to move a heavy crate of weight 875 {\rm n} by sliding it along a horizontal concrete floor. you push the crate to the right with a horizontal force of magnitude 300 {\rm n}, but friction prevents the crate from sliding. now assume that the crate is sliding along the floor with constant velocity. what is the magnitude f_p of the force you need to exert on the crate to make it continue to slide along the floor with constant velocity?
Answers: 2
Physics, 22.06.2019 00:30, powberier6979
Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.
Answers: 2
Physics, 22.06.2019 16:30, skiddymark3ox93za
Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?
Answers: 2
Suppose you have to move a heavy crate of weight 875 {\rm n} by sliding it along a horizontal concre...
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