Ball a is thrown straight up with an initial speed v0 and reaches a maximum elevation h before falling back down. when a reaches its maximum elevation, a second ball is thrown straight upward with the same initial speed v0. at what height, y, will the balls cross paths? a. y = hb. y > h/2c. y = h/2d. y < h/2e. y =0

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk

In general, how do thermosetting plastics compare to thermoplastics in mechanical and physical properties?

Aparticle moves along a straight line such that its acceleration is a=(4t^2-2) m/s, where t is in seconds. when t = 0, the particle is located 2 m to the left of the origin, and when t = 2, it is 20 m to the left of the origin. determine the position of the particle when t=4s.