Answer:
a)
b)
Explanation:
Apparent frequency of the siren is given as

as we know that the wavelength will remain the same as it is having originally
sowe know


a) Now when wind is blowing from source to official
so we have

so we have


b) Now when wind is from official to source
so we have

so we have


This can be seen as a trick question because heat engines can typically never be 100 percent efficient. This is due to the presence of inefficiencies such as friction and heat loss to the environment. Even the best heat engines can only go up to around 50% efficiency.
<span>Both objects receive the same impulse.</span>
2 maybe I’m not sure but the app told me to answer some questions and I don’t know anything to be honest I hope someone will come and help you have a nice day
B
A quantity that has magnitude and direction.