The orbital speed of the material in the solar nebula at Pluto's average distance from the Sun is about 5 km/skm/s. What was the orbital speed of this material when it was 28,000 AUAU from the Sun (before it fell inward with the collapse of the nebula)? Use the law of conservation of angular momentum.

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig

Simon is writing a story about an astronaut whose spacecraft has been boarded by space pirates. the astronaut has her lucky penny in her hand behind her back as the space pirates break into the control room. she has just locked the controls so that the ship is accelerating in the direction of the control room’s ceiling. simon wants the astronaut to use the penny to hit a button on the control panel to turn off the lights and escape. the button is located a short distance behind and below the astronaut’s hands. how should simon use the theory of relativity to describe what the astronaut must do in order to hit the button?