D. Because the moons shadow during a total lunar eclipse is tinnier than the earth.
Answer:
Explanation:
Given
velocity of driver 
=25 m/s w.r.t ground towards north
driver observes that rain is making an angle of 
with vertical
While returning 
=25 m/s w.r.t. ground towards south
suppose 
=velocity of rain drop relative car while car is going towards north
=velocity of rain drop relative car while car is going towards south
z=vector sum of 
Now from graph
therefore magnitude of z is given by
Thus rain drops make an angle of w.r.t to ground
Answer:
Reflection of light means the bouncing back of light in another direction after hitting a smooth polished surface
<h3>
<u>laws </u><u>of </u><u>reflection</u></h3>
1) Angie of incidence is equal to the angle of reflection
2) The nornal ray, reflected ray and the incident ray all lie in the same plane
Answer:
1.5 x 10⁵ W
Explanation:
A = Area of the fresh lava = 1.02 m²
T = Temperature of fresh lava = 1000 °C = 1000 + 273 = 1273 K
T₀ = Temperature of surrounding = 25.3 °C = 25.3 + 273 = 298.3 K
ε = emissivity of the lava = 0.97
σ = stefan's constant = 5.67 x 10⁻⁸ Wm⁻²K⁻⁴
Rate of transfer is given as
E = σ ε A (T⁴ - T₀⁴)
E = (5.67 x 10⁻⁸) (0.97) (1.02) ((1273)⁴ - (298.3)⁴)
E = 1.5 x 10⁵ W
