As they are Alkali metals (group 1), they are extremely reactive in both air and water so must be stored in kerosine to stop them from reacting with the air or water.
Answer:
by reducing the frequency of the wave by a factor of three
Explanation:
Speed = wavelength * frequency.
Wavelength = speed/frequency
The speed of an electromagnetic wave in a vacuum is constant. Meanwhile the wavelength and frequency have an inverse relationship which means for every rise in any of the parameters there will also be a corresponding fall.
Since the wavelength is tripled then the frequency will also be reduced by a factor of 3
Answer:
green light have high energy
Explanation:
We have given the wavelength of the red light 
Speed of the light 
The energy of the signal is given by 
The frequency of the green light is given by:
So energy 
So green light have high energy
The air drag is a force that depends on the speed of an object relative to the wind. Under certain conditions, it can be modeled as:
Where b is a constant.
As a falling object reaches a speed so that its weight is cancelled out by the air drag, the object will reach a maximum velocity.
In a speed vs time gaph, the speed would approach the maximum speed like an asymptote.
On the other hand, since the object falls from rest, the initial speed on the graph must be zero.
Taking these considerations into account, the correct graph for the movement of an object that falls from rest if air drag is not ignored, is option B.
Answer:
i think that bad but actually isnt bad because their good at being bad but they are actually bad but actually isnt bad because their good at being bad but they are actually bad but actually isnt bad because their good at being bad but they are actually bad but actually isnt bad because their good at being bad but they are actually bad but actually isnt bad because their good at being bad but they are actually bad but actually isnt bad because their good at being bad but they are actually bad but actually isnt bad because their good at being bad but they are actually bad but actually isnt bad because their good at being bad but they are actually bad but actually isnt bad because their good at being bad but they are actually bad but actually isnt bad because their good at being bad but they are actually bad but actually isnt bad because their good at being bad but they are actually bad but actually isnt bad because their good at being bad but they are actually bad but actually isnt bad because their good at being bad but they are actually bad but actually isnt bad because their good at being bad but they are actually bad but actually isnt bad because their good at being bad but they are actually bad but actually isnt bad because their good at being bad but they are actually bad, that makes me say, its A
Answer:
Explanation:
Explanation:
