Adrag racer completes a race in 14.3 s. if the drag racer has an average speed of 251 km/h, how long is the racetrack?

Explanation:

Time taken to complete the race, .

Average speed, .

First we will convert v in .

Therefore, .

Now, length of racetrack is given by , .

.

Hence, this is the required solution.

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m

b

explanation: