Two forces are exerted on an object in the vertical direction: a 20 N force downward and a 10 N force upward. The mass of the ob
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Answer:
Explanation:
The bulldozer is moving the rocks as one system, the weigth for the complete system is:
From newton´s second law the acceleration can be related to the force by:
on the middle rock we have the force F12 from the first to the middle rock on the direction of movement and F32 from the las rock to the middle rock on the opposite direction of movement.
For the last rock to accelerate at the same rate it must be subjected to a force:
This equals the force F32 on the opposite direction. the resultant force on the middle rock to mantain this acceleration should be:
The sum of all the forces applied to the middle rock is:
Solving for F12:
Answer:
- CaCO₃ and
- NaOH.
Explanation:
Polyatomic ions are ions that contain more than one atom in each one of the ions.
Ionic compounds are made of cations (positive ions) and anions (negative ion). By convention, the cation is written before the anion.
List the ions in each compound:
<h3>CaCO₃</h3>Cation: ,
Anion: .
is a monatomic ion for it contains only one atom in each ion.
is a polyatomic ion for it contains four atoms (one C atom and three O atoms) in each ion.
Cation: ,
Anion: .
Both and
are monatomic for they contain only one atom in each ion.
Cation: ,
Anion: .
Both and
are monatomic for they contain only one atom in each ion.
Cation: ,
Anion: .
Both and
are monatomic for they contain only one atom in each ion.
Cation: ,
Anion: .
is a monatomic ion for it contains only one atom in each ion.
is a polyatomic ion for it contains two atoms (one O atom and one H atom) in each ion.