The car on the left is moving with a velocity of 3 m/s, and the other two cars are stationary. The moving car collides with the middle car. The two cars couple and continue to move together until they couple with the third car. If the direction of positive motion is to the right, what is the final velocity of the three coupled cars?
O 1.5 m/s

Order the sequence of ideas that lead to marie curies discovery of radioactive elements number the events in chronological order starting with the oldest

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

Ineed the answer to question 1 , i’m desperate