Acertain satellite orbiting earth has a speed of about 17,000 miles/hour. what is its approximate speed expressed to the correct number of significant figures in kilometers/second? one kilometer is about 0.62 mile, and there are 3,600 seconds in an hour.

a.
2.9 km/s
b.
7.6 km/s
c.
38,000,000 km/s
d.
99,000,000 km/s

B. 7.6 km/s

Explanation:

Given:

Speed of the satellite orbiting Earth is,

In order to convert the speed from miles/hour to km/s, we need to convert miles to km and hour to seconds.

The conversion factors are:

0.62 miles = 1 km

∴ 1 mile =

1 hour = 3600 s

Now, 17000 miles/hour can be rewritten as:

Therefore, the speed in km/s is 7.6 km/s.

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

i think it's 35 meters