What is the radiosity of a black body at 1000 K?
What will be an ideal response?
For a black body the radiosity is the emitted radiation,
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Discuss the various energy conversions that occur when a person performs a pole vault. Include as many conversions as you can, and consider times before, during, and after the actual vault itself
What will be an ideal response?
Which of the following statements is true about any collision between two objects with no net applied force acting?
a. Momentum is never conserved and kinetic energy is always conserved. b. Momentum is always conserved and kinetic energy is never conserved. c. Momentum is always conserved and kinetic energy is sometimes conserved. d. Momentum is sometimes conserved and kinetic energy is always conserved. e. Momentum and kinetic energy are both always conserved.
A child pulls on a wagon with a horizontal force of 75 N. If the wagon moves horizontally a total of 42 m in 3.0 min, what is the average power generated by the child?
A) 18 W B) 22 W C) 24 W D) 27 W
If you shout across a canyon and the echo returns in four seconds, how far away is the other side? (Velocity of sound in air is 300 m/s)
a. 150 b. 300 c. 600 d. 1200 e. 2400 meters