# Posts by jjwatt

Total # Posts: 3

**physics**

A lizard of mass 3.0 g is warming itself in the bright sunlight. It casts a shadow of 1.6 cm^2 on a piece of paper help perpendicularly to the Sun’s rays. The intensity of sunlight at the Earth is 1.4 x 10^3 W/m^2, but only half of this energy penetrates the atmosphere ...

**math**

Using proportions and cross multiplication-- 0.2x=(3.2)(6.4) Therefore x= [(3.2)(6.4)]/.2 Thus, x= 102.4

**physics**

A 20 g lead bullet leaves a rifle at a temperature of 47 degrees celcieus and travels at a velocity of 500 m/s until it hits a large block of ice at 0 degrees celcuis and comes to rest within it. How much ice will melt?