Answer:
Option D - 0.2 s
Explanation:
We are given;
Initial velocity; u = 7 m/s
Height of table; h = 1.8m
Now,since we want to find the time the car spent in the air, we will simply use one of Newton's equation of motion.
Thus;
h = ut + ½gt²
Plugging in the relevant values, we have;
1.8 = 7t + ½(9.8)t²
4.9t² + 7t - 1.8 = 0
Using quadratic formula to find the roots of the equation gives us;
t = -1.65 or 0.22
We can't have negative t value, thus we will pick the positive one.
So, t = 0.22 s
This is approximately 0.2 s
I believe that the answer to this question is the letter A!
I would say d because the student isn’t moving, the Ferris wheel is.
Answer:
From shortest wavelength to longest wavelength:
Gamma Rays
X-Rays
Ultraviolet
Visible Light
Infrared waves
Microwaves
Radio Waves
Explanation:
Answer:
Explanation:
Rydberg's formula is used to describe the wavelengths of the spectral lines of chemical elements similar to hydrogen, that is, with only one electron being affected by the effective nuclear charge. In this formula we can find the rydberg constant, knowing the wavelength emitted in the transcision between two energy states, we can have a value of the constant.
Where 
it is the wavelength of the light emitted, R is the Rydberg constant, Z is the atomic number of the element and 
are the states where 
.
In this case we have Z=1 for hydrogen, solving for R:
This value is quite close to the theoretical value of the constant 
