Um corpo de massa igual a 2kg move-se com velocidade constante num plano horizontal sem atrito, conforme a figura. Em seguida, e
ncontra uma rampa e sobe até a altura de 2,2 m.No percurso, 40% da energia mecânica se perdeu por conta do atrito.
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Inorganic chemical compounds
Explanation:
Inorganic chemical compounds employ the use of oxidation numbers of atoms to write their chemical formula.
- The oxidation number is the formal charge assigned assigned to an atom present in a molecule or formula unit or ion based on some rules.
- Knowledge of this number is used in writing the formulae of inorganic compounds.
- These compounds forms by the exchange of certain small whole numbers by atoms or groups of atoms.
- The combining power usually correspond to the number of electrons usually lost or gained or shared by atoms of elements during chemical combinations or the number of positive or negative charges carried by ions.
For example:
A B
combining power(Valency): X Y
Exchange of valencies Y X
Molecular formula of compound ABₓ
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Compounds brainly.com/question/5961886
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(a) The momentum of a moving object is given by:
where m is the mass of the object and v is its speed. In this problem, the mass of the elephant is and its speed is
, therefore its momentum is
(b) We can use the same formula to calculate the momentum of the tranquilizer dart, whose mass is and whose speed is
:
we see that the elephant's momentum is much larger than the momentum of the dart.
(c) Again, using the same formula, the mass of the hunter is , his speed is
, therefore his momentum is