If the position vector of the particle is given by vector r=3t^2i+5tj+4k find the velocity of the particle at t=3secs
speed of the particle at t=3secs
acceleration of the particle at time t=3secs​

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.  

conservation of mass

mass before something happens = mass afterwards