Answer:
The answer is B, although technically that is an eclipse.
Kinetic energy of any object = (1/2) (object's mass) (object's speed)²
Arrow's kinetic energy = (1/2) (0.217 kg) (100 m/s)² = 1,085 Joules
Pumpkin's kinetic energy = (1/2) (3.75 kg) (7.25 m/s)² = 98.5 Joules
== 1,085 Joules is more than 98.5 Joules.
==> <em>The arrow</em> has more kinetic energy than the pumpkin has.
Answer:
Explanation:
For refraction , the formula is
sin i / sin r = μ₂ / μ₁
where light is travelling from medium 1 to 2 having refractive index of μ₁ and μ₂ . Angle of incidence in medium 1 is i and angle of refraction in medium 2 is r .
Here i = 70°, r = 37°
μ₁ = 1.8 ,μ₂ = ?
sin70 / sin 37 = μ₂ / 1.8
.939 / .602 = μ₂ / 1.8
1.56 = μ₂ / 1.8
μ₂ = 2.81 .
In order to overcome an object’s inertia (resistance to change), it must be acted upon by an unbalanced force, so the answer to the problem is letter C.
