Question

Cosmic rays are highly energetic particles which can travel at great speeds through outer space. A typical speed for a cosmic ray is 1.29 x 10^8 m/s. What is this speed converted to km/hr (kilometers per hour)? A. 1.29 x 10^5 km/hr B. 35.8 km/hr C. 7.74 x 10^6 km/hr D. 4.64 x 10^8 km/hr

Answer 1

Speed of the cosmic rays,
`v=4.64* 10^8\ km/hr`

Step-by-step explanation:

It is given that, Cosmic rays are highly energetic particles which can travel at great speeds through outer space.

The speed of the cosmic rays,
`v=1.29* 10^8\ m/s`

We need to convert the speed of cosmic rays to kilometers per hour. We know that :

1 kilometers = 1000 meters

1 hour = 3600 seconds

`v=1.29* 10^8\ m/s=(1.29* 10^8* (1/1000\ km))/((1/3600\ h))`

On solving the above expression,

`v=464400000\ km/h`

or

`v=4.64* 10^8\ km/hr`

So, the speed of the cosmic rays is
`4.64* 10^8\ km/hr`. Hence, this is the required solution.