The picture below shows a box in a state of static equilibrium. What are the quantities of forces X and Y?
50N
40N

Heat from the sun reaches earth to a. radiation b. convection c. conduction

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

Positrons are spontaneously emitted from the nuclei of