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valina [46]
3 years ago
6

Suspensions are a homogeneous mix True False​

Physics
2 answers:
meriva3 years ago
5 0

Answer:

False

Explanation:

Suspensions are not a homogeneous mix as the particles do not dissolve into the liquid as they are solids.

to give you an idea the definition of homogeneous is 'denoting a process involving substances in the same phase (solid, liquid, or gaseous).' and since suspension is a solid within a liquid it is not homogeneous

nirvana33 [79]3 years ago
4 0

Answer:

FALSE

Explanation:

Suspensions are heterogeneous mixtures from which some of the particles settle with time.

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1. For each of the following scenarios, describe the force providing the centripetal force for the motion: a. a car making a tur
GenaCL600 [577]

Complete Question

For each of the following scenarios, describe the force providing the centripetal force for the motion:

a. a car making a turn

b. a child swinging around a pole

c. a person sitting on a bench facing the center of a carousel

d. a rock swinging on a string

e. the Earth orbiting the Sun.

Answer:

Considering a

    The force providing the centripetal force is the frictional force on the tires \

          i.e  \mu mg  =  \frac{mv^2}{r}

    where \mu is the coefficient of static friction

Considering b

   The force providing the centripetal force is the force experienced by the boys  hand on the pole

Considering c

     The force providing the centripetal force is the normal from the bench due to the boys weight

Considering d

     The force providing the centripetal force is the tension on the string

Considering e

      The force providing the centripetal force is the force of gravity between the earth and the sun

Explanation:

6 0
3 years ago
A particle has 37.5 J of kinetic energy and 12.5 J of gravitational potential energy at one point during its fall from a tree to
Varvara68 [4.7K]

Answer: 50J

Explanation:

Mechanical energy follows the same principles of kinetic energy and potential energy, it is conserved. So Ei = Ef.

Mechanical energy is the sum of ALL energy's. There is no friction, so its just kinetic plus potential.

37.5 + 12.5 = 50J

Since the particle has not touched the ground, it has not transferred any energy to the ground yet, therefore the mechanical energy must still be 50J; mostly in kinetic energy with a very small amount of potential because of the low height relative to the ground.

3 0
3 years ago
If you start with a substance as a solid, what will happen to the molecules as you add thermal energy (heat)?
AveGali [126]

Answer:

C. molecules speed up as more thermal energy is added

Explanation:

The molecules will simply speed up as more thermal energy is added to the solid.

Thermal energy is a form of kinetic energy which is set in motion.

  • Heat causes kinetic energy build up in a body.
  • As the molecules of the solid gains heat, they will continue to increase in thermal energy.
  • They are forced to start vibrating about their fixed point.
  • Thereafter, when they have enough energy, they break free from the forces holding them.
  • Therefore, they move from a state of rest to one with a very high kinetic energy where the molecules moves rapidly.
  • This is why a solid will change to liquid and sometimes eventually gas
3 0
3 years ago
Does the work cause a change in kinetic energy or a potential energy?
Alla [95]

Answer:

Work cause a change in kinetic energy

3 0
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How does the friction get affected by the nature of surface?
aleksley [76]

Answer:

The heat causes the molecules on rubbing surfaces to move faster and have more energy.

8 0
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