A projectile attains its maximum height when the angle of projection is?
30°
45°
60°
75°
90°
Correct answer is E
Range R is maximum for angle of projection of 45º.
Maximum height is achieved with an angle of 90
0.5s
1.0s
1.7s
2.0s
3.4s
Correct answer is B
No explanation has been provided for this answer.
0.5Hz
4.0Hz
10.0Hz
100.0Hz
200.0Hz
Correct answer is D
No explanation has been provided for this answer.
Which of the following phenomena is responsible for the spherical shape of soap bubbles?
Adhesion
Capillarity
Cohesion
Osmosis
Surface tension
Correct answer is E
No explanation has been provided for this answer.
Compton effect and thermionic emission
Electron diffraction and refraction
emission and absorption of light
Interference and polarization
Reflection and photoelectric effect
Correct answer is C
No explanation has been provided for this answer.