Question

Express each in standard form. i) 6872 ii) 140000 iii) 153600000000

Answer 1

Answer:

6.872 × 10 to the 3th power

1.4 × 10 to the 5th power

1.536× 10 to the 11th power

Step-by-step explanation:

always try to get a small number between 0 and 10 (never 0 or 10) then you would multiply to get back to the orginal number for example if you multiplied 6.872 × 10 to the 3 power (6.872×1000) you would get back the original number.

(Am really bad at explaining hope this helps)

Answer 2

Yes, electromagnets have poles if they are constructed in the usual way as a coil of wire. The Direction of the poles is perpendicular to the planes of the loops of wire. A straight segment of wire also has a magnetic field when current flows. This magnetic field forms a circle around the wire, so it has no poles.

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