<span>Answer: "a cold front" .
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Bike
because it involves lots of angular mechanics that allow it to balance itself when moving.
all other examples have a constant force being applied into the system which is very easy to formulate, therefore they are simple machines.
Density= how much mass is in a certain volume
Therefore, you do (mass/volume).
density of the block is
36g/9cm3
or
4g/cm3
Meaning that there is 4 grams of mass in each cm3.
<span>Wavelength = (speed) / (frequency)
Speed of EM radiation = 3 x 10⁸ m/s
Frequency (3 × 10¹⁹ Hz) ===> wavelength = 0.01 nanometer
Frequency (3 × 10¹⁶ Hz) ===> wavelength = 10 nanometers</span>
This is the region of X-rays.
Answer:I think the answer is B. The alpha Deacy but not sure
Explanation: