Answer:
statements <em><u>2, 3, 4, and 7</u></em> are true
Explanation:
A. is the right answer since work is negative and Q which is heat in negative also
I think is True! Is the best answer. Because the trumpet it make them sounds like the lips with the musician and it vibrate.
Explanation:
It is given that,
Length of the helicopter, l = 3.1 m
The helicopter rotates, the length of helicopter will become the radius of circular path, r = 3.1 m
Angular speed of the helicopter, 
(a) The centripetal acceleration in terms of angular velocity is given by :



(b) Let v is the linear speed of the tip. The relation between the linear and angular speed is given by :


v = 90.89 m/s

Hence, this is the required solution.
True if you have proper stance and use your body the right way then the ball will be below your waist to allow for more control.