Given that,
Velocity , V = 20 m/s
Radius of curve, r = 50 m
Centripetal acceleration, ac = ?
since,
ac = V²/ r
ac = 20²/50
ac = 8 m/s²
The centripetal acceleration of car is 8 m/s².
Answer:
1.97 × 10⁻¹⁸J
Explanation:
Charge of an electron q = -1.9 × 10⁻¹⁹C
Length of one side of the equilateral triangle at whose corners electrons are placed d = 3.5 × 10⁻¹⁰m
Coulomb constant k = 8.99 × 10⁹Nm²/C²
electrostatic potential = (3 kq²) / d
= (3 × 8.99 × 10⁹ × (-1.6 × 10⁻¹⁹)²) / 3.5 × 10⁻¹⁰
= 1.97 × 10¹⁸J
By the laws of reflection, we know,
Angle of reflection = Angle of incidence
angle of reflection = 30%
In short, Your Answer would be 30
Hope this helps!