A train it speed steading from 10 m/s to 20m/s in 1 minutes average speed during this time in m/s how far does it travel while increase its speed

Lets say that an object of a certain volume has a certin mass. what happens to its mass when you double its volume?

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block