Physics, 05.07.2019 00:10 jasarochel
Ahas a clock whose time between ticks is exactly 1 s. spaceship a approaches the earth at 0.8c from the north while spaceship b approaches the earth at 0.6c from the west. what is the time between ticks of the a-clock as measured by observers in spaceship b? (25 pts) 2) electrons are accelerated to high speeds by a two-stage machine. the first stage accelerates the electrons from rest to 0.99c. the second stage accelerates the electrons from 0.99c to 0.999c. a) how much energy must be supplied to th electrons by the first stage? b) how much energy must be supplied to the electrons by the second stage, given that the increase in the electron's speed is now only 0.9 percent? c) which energy supply is higher, and by how much? (20 pts) 3) spaceship a moves past the earth at 0.98c, trying to catch up with spaceship b moving in the same direction at constant speed. when spaceship b passed the earth, observers on this planet measured its inertia to be 3.6x10 kg, a value 20% greater than that measured by its own crew. what does the crew of spaceship a measure for the inertia of spaceship b? (25 pts) 4) an electron having a kinetic energy k of 1 mev makes a head-on collision with a positron at rest. in the collision, the two particles annihilate each other and produce two y-rays of equal energy, traveling at equal angles 0 with the electron's initial direction of motion. find the energy, momentum and angle of emission 0 of the y-rays.
Answers: 3
Physics, 22.06.2019 09:30, officialariana01
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
Answers: 3
Physics, 22.06.2019 11:00, Arielledt10
1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?
Answers: 1
Ahas a clock whose time between ticks is exactly 1 s. spaceship a approaches the earth at 0.8c from...
Mathematics, 13.01.2021 03:10
Mathematics, 13.01.2021 03:10
Mathematics, 13.01.2021 03:10