Awindow has a glass surface of 2907 cm2 and a thickness of 5.6 mm. find the rate of energy transfer by conduction through this pane when the temperature of the inside surface of the glass is 71◦f and the outside temperature is 81 ◦f. assume the thermal conductivity of window glass is 0.8 j/s · m · ◦ c . answer in units of kw

part bfind the rate of energy transfer for the same inside temperature and an outside temperature of 0◦f.

Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.