Many caterpillars construct cocoons from silk, one of the strongest naturally occurring materials known. each thread is typically 2.0 μm in diameter, and the silk has a young's modulus of 4.0×109 n/m2. assuming that there is no appreciable space between the parallel strands, how many strands would be needed to make a rope 8.8 m long that would stretch only 1.02 cm when supporting a pair of 85-kg mountain climbers? = strands again assuming that there is no appreciable space between the parallel strands, what would be the diameter of the rope?

Arescue plane flying horizontally at spots a survivor in the ocean directly below and releases an emergency kit with a parachute. because of the shape of the parachute, it experiences insignificant horizontal air resistance. if the kit descends with a constant vertical acceleration of, how far away from the survivor will it hit the waves?

Aprojectile is launched from ground level with an initial velocity of v 0 feet per second. neglecting air resistance, its height in feet t seconds after launch is given by s equals negative 16 t squared plus v 0 t. find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when v 0equals112 feet per second. (a) find the time(s) that the projectile will reach a height of 192 ft when v 0equals112 feet per second. select the correct choice below and, if necessary, fill in the answer box to complete your choice.

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted