A trolley of mass 1kg is moving at 2ms(-1).It collides with a stationary trolley of mass 2kg. This second trolley moves off at 1.2ms(-1). a) Draw before and after diagrams to show the situations
b) use the principle of conservation of momentum to calculate the speed of the first trolley after the collision. in what direction does it move?

the expression 15n + 2(3p) represents the amount isaiah spent buying gasoline and snacks, where n represents the price of each gallon of gasoline and p represents the cost of each snack that he bought. which statement is true about the amount isaiah spent?

c)as speed changes, wavelength and frequency change.

everything changes!

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.