The african bombardier beetle stenaptinus insignis can emit a jet of defensive spray from the moveable tip of its abdomen. the beetle's body has reservoirs of two different chemicals; when the beetle is disturbed, these chemicals are combined in a reaction chamber, producing a compound that is warmed from 20∘c to 100∘c by the heat of reaction. the high pressure produced allows the compound to be sprayed out at speeds up to 19m/s (68km/h), scaring away predators of all kinds. (the beetle shown in the figure is tethered to a wire fastened to its back by wax. it is responding to having its left foreleg pinched by forceps. the beetle is 2cm long.)

calculate the heat of reaction of the two chemicals. assume that the specific heat capacity of the two chemicals and the spray is the same as that of water, 4.19×103j/kg⋅k, and that the initial temperature of the chemicals is 20∘c.

Ahydroelectric plant takes energy from water and turns it into electrical energy. what are the transformations of energy in the water molecules that are used in the process of generating electricity this way?

Part a determine the magnitude of the x component of f using scalar notation. fx f x = nothing lb request answer part b determine the magnitude of the y component of f using scalar notation. fy f y = nothing lb request answer part c determine the magnitude of the z component of f using scalar notation. fz f z = nothing lb request answer provide feedback figure1 of 1a force vector acting on a ring attached to the ground is shown in the xyz space together with its x, y, and z components lying on the corresponding positive axes. the ring is located at the origin. force f is located in the first octant. f makes an angle of 60 degrees with its x component and an angle of 45 degrees with its y component. a force vector acting on a ring attached to the ground is shown in the xyz space together with its x, y, and z components lying on the corresponding positive axes. the ring is located at the origin. force f is located in the first octant. f makes an angle of 60 degrees with its x component and an angle of 45 degrees with its y component.

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories