Well, half-life is the radioactivity of an identified isotope that decreases by half of the actual value.
So, your answer would be C.
<span>Energy is unable to change forms. please select the best answer from the choices provided</span>
F - False
The answer should be copper. hope this helps :D
Body
Natural laws
Hope I helped
Answer:
Speed of the hawk, v = 40.4 m/s
Explanation:
It is given that,
Exact frequency of the female, f = 785 Hz
Observed frequency of female, f' = 890 Hz
Speed of sound, v = 343 m/s
Let v' is the speed of the hawk. It is based on the concept of Doppler's effect. We know that when the object approaches you, its speed is given by :


v' = 40.4 m/s
So, the speed of the hawk is 40.4 m/s. Hence, this is the required solution.