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If 2x^2 + kx-8 = 0 has two equal real roots, then
- k is an imaginary number.
- k=+/-8.
- k=-8.
kornei84 asking:
what do they want from us here?
The median of the values 20, 28, 17, 34, 40, 11, 34, 26 is
- 26.25.
- 27.0.
- 34.0.
kornei84 asking:
26.25
The reason for sharp leading edged wings on high speed aircraft is to
- enable the shockwave to be accurately positioned.
- enable the shockwave to be pushed aft and reduce wave drag.
- reduce the laminar boundary layer thickness on the wing surface.
max.steelame asking:
Please explain
The atmospheric zone where the temperature remains fairly constant is called the
- stratosphere.
- ionosphere.
- troposphere.
max.steelame asking:
Please explain
To overcome ineffective control surface problems in the transonic region
- an all moving tailplane may be used.
- hydraulically boosted elevators may be used.
- Frise type ailerons may be fitted instead.
max.steelame asking:
Please explain