Which statement best explains Wegener's hypothesis of continental drift?

1.Volcanic activity slowly reshapes the continents throughout Earth's geologic history.

2.The continents shift locations as a result of major catastrophes like meteorite impacts and earthquakes.

3.The continents rapidly change places from one hemisphere to another when Earth's magnetic field reverses.

4.The continents were once part of the same landmass and have moved very slowly to their current positions

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?

The first-order reaction a→2b+c has rate constant 0.538 s−1. if the initial concentration of a is 0.867 mol l−1, what is the half-life of the reaction in seconds? remember to use correct significant figures in your answer (round your answer to the nearest hundredth). do not include units in your response.

Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction