Which is true of the particles in a solid?

They are packed together in fixed positions.

The have indefinite mass and definite volume.

The are connected but are able to move freely.

They continue to expand to fill the available space.

An astronaut on the moon throws a baseball upward. the astronaut is 6 ft, 6 in. tall, and the initial velocity of the ball is 3030 ft per sec. the height s of the ball in feet is given by the equation s equals negative 2.7 t squared plus 30 t plus 6.5s=−2.7t2+30t+6.5, where t is the number of seconds after the ball was thrown. complete parts a and b.