The time in the 1,600 meter race at the school track meet is shown in the graph above. what is the average speed of the race ?

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What causes the formation of ocean currents?

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?