maddie7155
16.09.2021 •
Chemistry
Two positively charged objects (N pole) are separated by a large distance. One of the positively charged objects (N pole) is replaced by a negatively charged object (S pole), and the two objects are moved closer to each other.Which of the following occurs in this situation?AThe attractive force becomes a repulsive force, which increases as the objects move closer to each otherBThe repulsive force becomes an attractive force, which increases as the objects move closer to each other.CThe attractive force becomes a repulsive force, which decreases as the objects move closer to each other.DThe repulsive force becomes an attractive force, which decreases as the objects move closer to each other.
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Ответ:
B
Explanation:
Applying law of electrostatic which states that like charges repel each other and unlike charges attract each other
N and S are unlike charges that turn and make the former repulsive force (due to two like charges N and N)to reduce and attractive force between N and S to increase
Ответ:
Volume of liquid = 28.7 mL
Explanation:
Given data;
Density of solid = 3.57 g/ml
Mass of solid = 19.5 g
Volume of water = 23.2 mL
Total volume when solid is dropped into graduated cylinder=?
Solution:
Density = mass/ volume
v = m/d
v = 19.5 g/ 3.57 g/ml
v = 5.5 mL
The Volume of liquid = volume of water + volume of solid
Volume of liquid = 23.2 mL + 5.5 mL
Volume of liquid = 28.7 mL