An athlete at the gym holds a 3.0 kg steel ball in his hand. his arm is 78 cm long and has a mass of 3.8 kg, with the center of mass at 40% of the arm length from the shoulder. what is the magnitude of the torque about his shoulder due to the ball and the weight of his arm if he holds his arm.
a. straight out to his side, parallel to the floor?
b. straight, but 45° below horizontal?

What is the type of the reaction below? bacl2 + h2so4 → 2 hci + baso4 double replacement synthesis single replacement decomposition

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.

70 give a real life example showing how sensory neurons work with the motor neurons