PLEASE HELP! It’s urgent... and please show your work!!

1. The radius of Earth is 6370000 m. Express this measurement in km in
scientific notation with the correct number of significant digits.
a) 6.37 x 100 km
b) 637 x 103 km
c) 6.37 x 103 km
d) 63.7 X 104 km

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s

what is the actual question though?

that the claims meet official rules.

don't misinterpret the claims