Диаметр источника света 0,2 м, расстояние до экрана 2 м. На каком минимальном расстоянии от экрана следует разместить шар диаметром 0,08 м, чтобы он вообще не отбрасывал тень на экран, а давал только половину тени. Линия, проходящая через центры источника света и шара, перпендикулярна плоскости экрана.​

Immediately upon reaching its lowest point, a falling pendulum bob has its greatest amount of energy, which is the initial amount of potential energy. a. heat; less than b. heat; more than c. kinetic; less than d. kinetic; more than

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.