As you said, the speed is constant in a vacuum, so the speed does not change, The frequency, on the other hand, decreases by half. The wavelength, λ (lambda), the frequency, v, and the speed of light, c, are related by the equation λν = c. We can see that frequency and wavelength are inversely proportional, so an increase in wavelength has a corresponding decrease in frequency.
the answer is <u>HOT DOG</u>
The resistivity of a wire is given by:
Where 
is the electrical resistivity of the wire, 
is the length of the wire and r is the radius os the wire, Recall that 
. So:
We have 
. Thus:
The diameter of the new wire must be twice of the original wire.
The Universe is always expanding outwards
Answer:
B
Explanation:
This is a physics question, know that force is equals to mass divided by acceleration (acc.), so if the same force is applied, say 10 Newton and the mass of A is 2 and the mass of B is 4, then the acceleration of A is 0.2 and that of B is 0.4 by equating, and this applies to all cases.
