Một bình khí giãn nở kém có thể tích 20 lít chứa 10g khí hydro ở áp suất 8,2 at. Hơ nóng đẳng tích khối khí này đến khi áp suất của đó bằng 9 at . Hỏi nhiệt độ của khối khí sau khi hơ nóng là

In a bumper car arena, two cars of equal mass are heading straight toward each other. the orange one is traveling at a speed of 5 meters per second. the green one is traveling at a speed of 2 meters per second. which of the forces most affects the motion of the bumper cars after they collide? a) gravity b) friction c) the other car d) wind resistance

Two polarizers are oriented at 24.0∘ to one another. light polarized at a 12.0-degree angle to each polarizer passes through both. what is the transmitted intensity (%)?

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?