You inflate a balloons with helium the balloons feel stiff, which properties of a gas best explains this observation

the particles are moving quickly and far apart

the particles are closley packed and vibrate in place

the particles slide past each other and are close together

the particles are closley packed and are moving very quickly

What do elements in a family tend to share. a.) similar periods b.) similar groups c.) similar atomic symbols d.) similar chemical properties and characteristics

Which two particles are found in the center of an atom

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.