An alien spaceship traveling at 0.600c toward the earth launches a landing craft with an advance guard of purchasing agents and physics teachers. the lander travels in the same direction with a speed of 0.800c relative to the mother ship. as observed on the earth, the spaceship is 0.200 ly from the earth when the lander is launched.(a) what speed do the earth observers measure for the approaching lander? (b) what is the distance to the earth at the time of lander launch, as observed by the aliens?
Answers: 3
Physics, 21.06.2019 19:30
A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?
Answers: 1
Physics, 21.06.2019 21:30
How many seconds does it take a pebble released from rest off a bridge to fall 29.4 m ? what is the pebble's speed when it has fallen 29.4 m ?
Answers: 1
Physics, 22.06.2019 05:10
What do elements in a family tend to share. a.) similar periods b.) similar groups c.) similar atomic symbols d.) similar chemical properties and characteristics
Answers: 2
An alien spaceship traveling at 0.600c toward the earth launches a landing craft with an advance gua...
History, 17.07.2019 19:50
Social Studies, 17.07.2019 19:50
Mathematics, 17.07.2019 19:50
Social Studies, 17.07.2019 19:50
History, 17.07.2019 19:50
History, 17.07.2019 19:50