A59-db sound wave strikes an eardrum whose area is 5.0×10−5m2. the intensity of the reference level required to determine the sound level is 1.0×10−12w/m2. 1yr=3.156×107s. part a how much energy is absorbed by the eardrum per second?

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

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

The dot diagram represents the motion of the motorcycle as it moves from left to right