Answer:
332m/s
Explanation:
We know the formula for velocity is v=d/t, but this particular question is asking about an echo. The problem tells us the distance to the bird from the bat, which is 19.4. To find the echo, you need to find the distance from the bat to the bird and back.
So
19.4 x 2 = 38.8
And then plug into the equation
v = 38.8 / 0.117
= 332m/s
It give s you acceleration as slope of v-t graph gives acceleration
It could be many things, but the most noticeable will be the weight of the person
Answer:
141.13636 kg
Explanation:
= Mass of plane = 
= Maximum mass that the baggage compartment can hold
= Mass of person = 75 kg
= Distance between pilot and center of gravity
= Distance between baggage and center of gravity
= Distance between center of gravity with pilot and without pilot
As moment of the system is conserved we have the relation

The maximum mass that the baggage compartment can hold is 141.13636 kg