When you are talking about calculating the kinetic energy of an object, the formula is as stated:
Ek =1/2mv²
Where m is mass and v is velocity. Sub all those numbers in and you'll get 25J of kinetic energy.
The current will be divided by 2
Answer:
Explanation: Light travels at approximately 300,000 kilometers per second in a vacuum, which has a refractive index of 1.0, but it slows down to 225,000 kilometers per second in water (refractive index of 1.3; see Figure 2) and 200,000 kilometers per second in glass (refractive index of 1.5).
A "light year" is not an amount of time.
It's an amount of distance ... the distance that light travels
through space in one year.
1 light year = 5,878,625,372,000 miles
(rounded to the nearest thousand miles)
1 light-year = 9,460,730,473,000 kilometers
(rounded to the nearest thousand kilometers)
If the acceleration is centripetal then the formula is a=v^2/r
Plug in 58.8=v^2/.400 solve for v
V=12.12 m/s
