Which of the following is not an example of mechanical control of nonnative species? a. pulling b. inspections c. net barriers d. mowing

Answer;

-Net barriers

Explanation;

-Methods used to control nonnative species include mechanical, biological, and chemical means.

-Mechanical methods include mowing, clipping, hand pulling, and any other method that removes all or some of the plant. Mowing can be effective at removing plant seed heads before maturity, and forces plants to use energy resources to continue growing, instead of moving on to reproduction. If hand pulling is done at the right time, it removes the whole plant before it matures.

-The key to mechanical control is to get the plant before the seed matures, this way any disturbance to the seed head does not further spread the seed.

to be honest as much as i would love to answer this. i feel as if something's missing. just saying.

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it