Question

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Answer 1

Answer:

tester helps to check whether there is electrical conductivity in the object...if it has that it emits light bulb which was fixed in that

Answer 2

1)When an object is in equilibrium (either at rest or moving with constant velocity), the net force acting on it zero. A vector can only have zero magnitude if all of its components are zero.

2)tester is a person who has been asked to test a particular thing. A tester is a machine or device that you use to test whether another machine or device isworking properly. I have a battery tester in my garage.

3)Benjamin Franklin discovered the static electricity or lighting in clouds when he was flying a kite or during a kite experiment.

4)the retina, five types of neuron — photoreceptors, bipolar cells, retinal ganglion cells, horizontal cells and amacrine cells — are wired together to form one of nature's most complex circuit boards.

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