A 0.350 kg ball of clay is thrown and sticks to a 1.2 kg block of wood initially at rest on a horizontal frictionless surface. If the clay was initially moving toward the wood with a speed of 25 m/s, then calculate the speed of the clay-block system following their collision.

If an inclined plane is 5 m long and 2 m high, what is its mechanical advantage? a. 2.5 b. 3 c. 7 d. 10

In the first law of thermodynamics, triangle e=q-w, what does q stand for

Consider the growth of a 20-nm-diameter silicon nanowire onto a silicon wafer. the temperature of the wafer surface is maintained at 2400 k. assume the thermal conductivity of the silicon nanowire is 20 wm-1k-1 and all its surfaces including the tip are subjected to convection heat transfer with the coefficient h = 1×105 wm-2k-1 and t∞ = 8000 k. when the nanowire grows to l = 300 nm, what is the temperature of the nanowire tip (t (x =