A 0.2-cm-thick, 15-cm-long and 10 cm wide circuit board houses electronic components on one side that dissipate a total of 15 W of heat uniformly. The board is impregnated with a conducting metal fillings and has effective thermal conductivity of 15 W/m. K. All the heat generated in the components is conducted across the circuit board and is dissipated from the back side of the board to medium at 20 oC with heat transfer coefficient of 50 W/m2.K. 1) Determine surface temperature of the two side of the board. (2 points) 2) Now .1-cm-thick, 10-cm-high and 15-cm-long aluminum plate (k

A1,700kg car is being used to give a 1,400kg car a push start by exerting a force of 140n the impulse on the smaller car during the 30.0s of contact is +670kg*m/s. what is the impulse of the smaller car on the larger car? -814 kg*m/s 0kg *m/s -670kg*m/s -550kg*m/s

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)

To a of 4 x hz is 1. 0. mm nm nm