why did roosevelt most likely use the phrases “vain hope” and “panicky attempts” when referencing the axis powers ?

Two particles of masses m and 2m are placed on a smooth horizontal table. a string, which joins these two masses, hangs over the edge supporting a pulley, which suspends a particle of mass 3m.the pulley has negligible mass. the two parts of the string on the table are parallel and perpendicular to the edge of the table. the hanging parts of the string are vertical. find the acceleration of the particle of mass 3m.

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

How does an observation about an object differ from an inference about that object