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19.01.2020 •
Physics
Amixture of flour and water is called a mixture because the substances do not dissolve. a. homogeneous c. mass b. solid d. heterogeneous
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Ответ:
a)homogeneous
c)mass
b)solid
d)heterogeneous
It is D)heterogeneous
Ответ:
d. heterogeneous
Explanation:
Mixture is a substance which has two or more components which do not combine chemically and do not have any fixed ratio in which they are present.
Heterogeneous mixtures : It is a mixture that has non-uniform composition throughout the solution and the particle size or shapes are also different. There is a physical boundary between the dispersed phase and dispersion medium as the substances do not dissolve in each other.
Example: Flour in water
Homogeneous mixtures : It is a mixture that has uniform composition throughout the solution and the particle size or shapes are not different. There is no physical boundary between the dispersed phase and dispersion medium as the substances dissolve in each other.
Example: Salt in water
Ответ:
As we can see here the lever has two forces at two ends
1. 300 N
2. 200 N
now we need to find the Torque on the lever about the fulcrum
so we will have
1. clockwise torque due to force at right end is
2. counterclockwise torque due to force at left end
so as per above calculations we can see that net torque on the lever is clockwise as it has more torque in clockwise direction
so it will rotate clockwise