During a tennis serve, a racket is given an
angularacceleration of magnitude 160 rad/s2. at thetop
of the serve, the racket has an angular speed of 14 rad/s. ifthe
distance between the top of the racket and the shoulder is1.5m,
find the magnitude of the total acceleration of the top ofthe
racket.

379.521 m/s²

Explanation:

r = Radius = 1.5 m

= Angular acceleration = 160 rad/s²

= Angular speed = 14 rad/s

Tangential acceleration is given by

Centripetal accelration is given by

The resultant acceleration is given by

The magnitude of the total acceleration of the top of the racket is 379.521 m/s²

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.