Particle segregation is due mainly to which of the following? (A) particle size and shape (B) all of these are correct, so this is the answer (C) electrostatic forces and gravity (D) particle mass or density

Which of these is a problem encountered when mixing various sized particles? There can be particle segregation due to moisture in the air There can be segregation of particles because small denser particles fall down between larger lighter ones and lift them up There can be an explosion due to segregation among large particles in the blender There can be absorption of moisture from the air due to improper mixing

In the solid state, particles are closely packed together and have a definite _____.

Which of the following is the study of particle characteristics? A. Gravitational emission B. Trituration C. Micromeritics D, Comminution rate

Which of the following statements does NOT apply to the particles in a gas?The forces of attraction between them are very weakThey move randomlyThey move more quickly when the gas is heatedThey are not affected by gravity2A fixed amount of gas is held inside a container of fixed volume.  Which of the following will NOT occur when the gas is heated?Its particles will collide with each other (and the walls of the container) less frequentlyIts density will remain constantIts internal energy will increaseThe pressure which it exerts on the walls of the container will increase3A fixed mass of gas is held inside a container.  The volume of the container can be adjusted using a movable plunger.  What will happen when the plunger is moved outwards slowly (so that the volume of the container increases)?The pressure will decreaseThe pressure will increaseThe pressure will stay the sameIt is impossible to say what will happen to the pressure4A fixed mass of gas is held at a constant temperature.  What will happen to the pressure of the gas when its volume is halved?It is impossible to sayIt will halfIt will doubleIt will stay the same5The air inside a bicycle pump has a volume of 20 cm3 and a pressure of 100 kPa.  Calculate the pressure of this air when its volume is reduced to 5 cm3.  You may assume that the temperature of the air remained constant while it was being compressed.100 kPa25 kPa400 kPa10,000 kPa6A fixed mass of gas is held inside a container.  The volume of the container can be adjusted using a movable plunger.  When the plunger is pushed down quickly, the temperature of the gas increases.  Which of the following statements does NOT apply to this process?It causes the pressure of the gas to increaseEnergy is transferred to the gasWork is done by the gasThe particles that make up the gas move more quickly after the plunger has been pushed down

Which statement best describes the particles of a solid substance?*1 pointThe particles slide past one another.The particles are very far apart from one another.The particles keep position but can vibrate.The particles change their pattern of organization.