Question

Please help me to solve this problem..
I need all the answers.​

Answer 1

Answer:

1) Sublimation is a type of phase transition, or a change in a state of matter, just like melting, freezing, and evaporation. Through sublimation, a substance changes from a solid to a gas without ever passing through a liquid phase. Dry ice, solid CO2,

2) J. E. Purkinje

Answer 2

Answer:

1. Sublimation is a type of phase transition, or a change in a state of matter, just like melting, freezing, and evaporation. Through sublimation, a substance changes from a solid to a gas without ever passing through a liquid phase. Dry ice, solid CO2, provides a common example of sublimation.

2. (i) J. E. Purkinje

   (ii) thylakoid membrane

   (iii) The endoplasmic reticulum serves many general functions, including the folding of protein molecules in sacs called cisternae and the transport of synthesized proteins in vesicles to the Golgi apparatus.

3. (i) Momentum. If the mass of an object is m and it has a velocity v, then the momentum of the object is defined to be its mass multiplied by its velocity. momentum= mv. Momentum has both magnitude and direction and thus is a vector quantity. The units of momentum are kg m s−1 or newton seconds, N s.

  (ii) Momentum = Mass × velocity

So, here, momentum of the man (p) = m × v

p = 75 x 2kgms^-1

p = 150kgms^-1

Hope it helps u

Explanation: