The position of a particle moving along the x axis varies in time according to the expression x = 4t 2, where x is in meters and t is in seconds. evaluate its position at the following times.

(a)t=2.10s


(b)t=2.10s +δt
xf=

(c)evaluate the limit of δx/δt as δt approaches zero to find the velocity at t = 2.10 s.
/s

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt