Explain why, in adding perpendicular vectors, we can simply draw one vector and then start the second vector from the end of the first. The resultant vector is then from the origin of the first to the end point of the second vector.

There are weak or strong attractive forces between atoms of liquids with a high viscosity

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.

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s.what is the wavelength?