A space ship is observed to be length-contracted by a factor of 1/2. How fast is the space ship traveling, compared to the observers who noticed that it was length-contracted

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

Can you match these to the correct definition

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative