Energy from the Sun arrives at the top of the Earth\\\'s atmosphere with an inte

Question

Energy from the Sun arrives at the top of the Earth's atmosphere with an intensity of 1.36 kW / m2. How long does it take for 3.55 × 109 J to arrive on an area of 4.75 m2?_____s

The spaceship Intergalactica lands on the surface of the uninhabited Pink Planet, which orbits a rather average star in the distant Garbanzo Galaxy. A scouting party sets out to explore. The party's leader–a physicist, naturally–immediately makes a determination of the acceleration due to gravity on the Pink Planet's surface by means of a simple pendulum of length 1.23 m. She sets the pendulum swinging, and her collaborators carefully count 101 complete cycles of oscillation during 206 s. What is the result?______m/s2

Explanation / Answer

Here ,

intensity , I = 1.36 kW/m^2

energy , E = 3.55 *10^9 J

area , A = 4.75 m^2

let the time taken is t

energy = intensity * area * time

3.55 * 10^9 = 4.75 * 1.36 *10^3 * t

solving for t

t = 5.495 *10^5 s

the time taken is 5.495 *10^5 s

---------------------

length of pendulum , L = 1.23 m

let the acceleration due to gravity is g

time period = total time/number of cycles

206/101 = 2*pi*sqrt(L/g)

206/101 = 2 * pi * sqrt(1.23/g)

solving for g

g = 11.7 m/s^2

the acceleration due to gravity is 11.7 m/s^2

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.