What feature may form in an intraplate area over a rising plume of hot mantle material?

Abaseball picther can throw a ball at about 90 miles per hour, v = 40 m/s, on solid rock ground. we now put him into space. when he throws the ball, which weighs mb = 0.15 kg moves away from himat the same speed. how long does it take the ball thrown in space to travel the 30 meters to the batter? he weighs mp = 100kg

What are similarities and differences between refraction, reflection, diffraction and absorption?

Asystematic approach to problem solving is called a (an)