Q1 · easy · AI-verified
At which angle with respect to the horizontal is the range of a projectile (fired with a given speed) maximum?
- 45°
- 30°
- 60°
- 90°
Q2 · medium · AI-verified
A radar pulse travels at the speed of light (3 × 10⁸ m/s) and returns after 200 microseconds. What is the distance to the target?
- 30 km
- 60 km
- 45 km
- 15 km
Q3 · medium · AI-verified
In external ballistics, the trajectory (path) of a projectile in the absence of air resistance is which shape?
- Parabola
- Circle
- Ellipse
- Hyperbola
Q4 · hard · AI-verified
A sonar system emits an ultrasonic pulse that returns after 3 seconds. If the speed of sound in seawater is 1500 m/s, what is the depth of the submarine detected?
- 1500 m
- 2250 m
- 750 m
- 4500 m
Q5 · medium · AI-verified
In NBC warfare, the letter 'N' stands for which type of weapon?
- Napalm
- Nerve (chemical)
- Nuclear
- Neutron bomb only