1. The figure below shows the forces exerted on a block that is sliding to the right on a horizontal surface: the gravitational force of 40 N, the 40 N normal force exerted by the
surface, and a frictional force exerted to the left. The coefficient of friction between the
block and the surface is 0.20.
40 N
40 N
The acceleration of the block is most nearly
a. 1 m/s? to the right
b. 2 m/s to the right
C. 1 m/s? to the left
d. 2 m/s? to the left

Answerstatic electricity shock;

Stars are born within the clouds of dust and scattered throughout most galaxies. a familiar example of such as a dust cloud is the orion nebula. turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction. as the cloud collapses, the material at the center begins to heat up. known as a protostar, it is this hot core at the heart of the collapsing cloud that will one day become a star. three-dimensional computer models of star formation predict that the spinning clouds of collapsing gas and dust may break up into two or three blobs; this would explain why the majority the stars in the milky way are paired or in groups of multiple stars.therefor, i would say the answer is: dust and gases contract.i hope this ! < 3