Answer:
because they are found freely in nature uncombined so they are highly reactive with other elements
Answer:
Explanation:
Given
mass of drop
height of fall
ball leaves the foot with a speed of 18 m/s at an angle of
Velocity of ball just before the collision with the floor
Impulse delivered in Y direction
Impulse in x direction
at an angle of
The frequency of any wave is (wave speed) / (wavelength) .
The speed of light is 3 x 10⁸ m/s.
If the wavelength is 10 nm (10⁻⁸ m) , then the frequency is
(3 x 10⁸) / (10⁻⁸) = <em>3 x 10¹⁶ Hz</em>
That's 30 million gigahertz !
Answer:
The frequency of a wave is inversely proportional to its wavelength. That means that waves with a high frequency have a short wavelength, while waves with a low frequency have a longer wavelength.