Aplane has a takeoff speed of 88.3 m/s and can accelerate at a rate of 3m/s to reach that speed. how long does the plane take to take-off.

v =

and

a =

We have acceleration and velocity so:

3 =

88.3 =

In the acceleration equation we can isolate for v and then plug it back into the other equation to solve...

So...

Divide by three and

t = 29.4 s

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg