Asatellite dish is in the shape of a parabolic surface. signals coming from a satellite strike the surface of the dish and are reflected to the focus, where the receiver is located. the satellite dish has a diameter of 10 feet and a depth of 2 feet. how far from the base of the dish should the receiver be placed?

The energy released by a chemical reaction can be measured using a calorimeter. when barium hydroxide octahydrate crystals are reacted with dry ammonium chloride inside of a coffee cup calorimeter, the temperature of the 18.00 g of water in the calorimeter decreases from 30.0°c to 8.0°c. the equation for calculating energy absorbed or released by a reaction is: where q is the energy released or absorbed, m is the mass of water in the calorimeter, cp is the specific heat of water, and δt is the observed temperature change. if the specific heat of liquid water is 4.19 j/g·°c, how much energy was absorbed by the reaction?

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?