Answer:
A lot of the earth oxygen comes from the ocean around 50%-80%
Explanation:
Answer:
Electric Field = 3.369 x 10^4 N/C
Explanation:
Radius = r = (r1 + r2) / 2 = (1.6 + 3.6) /2 = 2.6 cm + 2.3 cm = 4.9 cm = 0.049 m
As we know, Electric field = E = kQ/r.r
= 8.98755 x 10^9 x 9 x 10^-9 / 0.049 x 0.049 = 33689.275 N/C
= 3.369 x 10^4 N/C
A neutron has zero charge but their mass is <span>1.67492716 × 10^-27 kg </span>
Answer:
1 friction produces heat which damages the moving part of a machine
2 a lot of energy is wasted In overcoming the friction before an object starts moving
3 friction produces wear and tear on the contacting surfaces