On an asteroid, the density of dust particles at a height of 3 cm is ~30% of its value just above the surface of the asteroid. assuming the temperature is 20 k and the average dust-particle mass is 10-19 kg. estimate the gravitational acceleration on the asteroid. a. 2 m/s^2b. 10 m/s^2c. 0.1m/s^2

In which of the following cases is work being done on an object? question 2 options: pulling a trailer up a hill carrying a box down a corridor suspending a heavy weight with a strong chain pushing against a locked door

Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final