Улитка движется из т. А
в направлении, показанном на рисунке и, описав одну полную "восьмёрку", возвращается в начальное положение через

мин

с
Радиус
большой окружности в
раза больше радиуса
малой. Скорость улитки постоянна по модулю всё время движения и равна

мм
с
Определите радиус
малой окружности. Ответ выразить в
см
округлив до десятых. Длина окружности равна
где
— радиус окружности. Число

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

How to tell if a molecule is polar or nonpolar with electronegativity

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?