Because of trapped air inside, snow is a   Question options: 1 both a good insulator and a poor conductor. 2 none of these 3 good insulator. 4 good conductor.

PHET Density X Assignme x → Topic9Wri x y! A diver st X Ⓒ File | C:/Users/marko/Downloads/Topic8WrittenPortion_6_7.pdf Netflix Party - Chro... 90°F Sunny Topic8WrittenPortion_6_7.pdf 1 2 3 Assignments M Gmail D YouTube → Maps A diver st X Netflix CA steel ba x Netflix 1 2/3 | Chegg.co X Log In | TherapyPor... | Topic8W x 100% + | A y! A child's 1 > DELL y! A child's t X A child's toy has a solid plastic disc of radius 10cm that can be rotated about its center. Child A applies a force of 30N tangent to the edge of the disc to cause it to rotate counter clockwise. Child B also applies a force of 20N tangent to the edge of the disc to cause it to counter clockwise. The net torque applied to the disc causes an angular acceleration of 8.33rad/s^2. a) What is the moment of inertia of the solid plastic disc? (answer: 0.6kgm^2) b) What is the mass of the solid plastic disc? (answer: 120kg) C The absol X + I ➡I 0 Q.1 7:23 PM 7/19/2022 x : ⠀

51 A sphere of radius 0.500 m, temperature 27.0°C, and emis- sivity 0.850 is located in an environment of temperature 77.0°C. At what rate does the sphere (a) emit and (b) absorb thermal radia- tion? (c) What is the sphere's net rate of energy exchange?

An aluminum cup with mass 0.26 kg holds 0.30 kg of water. Both the cup and the water have a temperature of 15.°C. If a 0.55-kg piece of copper at 80.°C is added to the cup, what is the final equilibrium temperature in °C? You may assume that the cup, water, and copper are well insulated from anything else. (What can I do to solve this? What equations can I use?)