The correct answer is c.
work is calculated by force * distance less force means less work there its self explanatory c
The tiny particles that make up elements are called "molecules"
Answer:
Explanation:
Let hotter star has surface area of A . The cooler star would have surface area 9 times that of hotter star ie 9A , because its radius is 3 times hot star. Let temperature of hot star be T ₁.
Total radiant energy is same for both the star
Using Stefan's formula of black body radiation,
For cold star E = 9A x σ T⁴
For hot star E = A x σ T₁⁴
A x σ T₁⁴ = 9A x σ T⁴
T₁⁴ = (√3)⁴T⁴
T₁ = √3T .
b )
Let the peak intensity wavelength be λ₁ and λ₂ for cold and hot star .
As per wein's law
for cold star , λ₁ T = b ( constant )
for hot star λ₂ √3T = b
dividing
λ₁ T / λ₂ √3T = 1
λ₂ / λ₁ = 1 / √3
The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without this atmosphere. Radiatively active gases in a planet's atmosphere radiate energy in all directions
Answer:
5 m
35 m
Explanation:
From the formula
s = ut + 1 /2 g t²
u = 0 ; t = 1.
s = 1 / 2 x 10 x 1 = 5 m
In first second distance traveled is 5 m .
Time to travel 80 m is t
80 = 0 + .5 x 10 t²
t = 4s
In last one second
s = u +
= 0 + (2 x4 -1 )x 10 /2 = 35 m .