17. Free Response. A 0.40-kilogram mass is sliding on a horizontal, frictionless air track with a speed of 5.0 meters per second when it instantaneously hits and sticks to a 2.3-kilogram mass initially at rest on the track. The 2.3-kilogram mass
is connected to one end of a massless spring at the springs unstretched compressed position (equilibrium), which has a
spring constant of 100 newtons per meter. The other end of the spring is fixed to a wall.
Determine the following for the 0.40-kilogram mass immediately before the impact.
į. Its linear momentum
ii. Its kinetic energy
a.

B. that is the answer

Chromium  +  hydrogen sulfate  =  chromium(iii) sulfate  +  hydrogenso then it will be  a. cr + h2so4? cr2(so4)3 + h2 

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