The free lower end of the rope is struck sharply at time t=0. what is the time t it takes the resulting wave on the rope to travel to the ceiling, be reflected, and return to the lower end of the rope? express your answer in terms of l and constants such as g (the magnitude of the acceleration due to gravity), π, etc.

What equation is used to calculate the weight of an object on a plant ?

Which of the following describes how a microwave heats food

Consider motion in one dimension. (the sign of the vector quantities is their direction indicator.) an object moves in the positive x-direction with speed 2.9 m/s for 4.5 s. it stops for 3.8 s and then moves in the negative x direction with speed 2.8 m/s for 4 s. what is the total distance traveled by the object in units of meter? enter a number with two digits behind the decimal point.