A. Bones provide protection for organs in the body
The beginning of the Phanerozoic is marked by the development of hard body parts, such as shells and bones.
Answer: 6.12 kg
Explanation:
Since Mass of ball = ? (let the unknown value be Z)
Acceleration due to gravity, g= 9.8m/s^2
Height, h = 1.5 metres
Gravitational potential energy GPE = 90J
Gravitational potential energy depends on the weight of the ball, the action of gravity and height.
Thus, GPE = Mass m x Acceleration due to gravity g x Height h
90J = Z x 9.8m/s^2 x 1.5m
90 = Z x 14.7
Z = 90/14.7
Z = 6.12 kg
Thus, the bowling ball weigh 6.12 kilograms
Answer:
261.64 hz
Explanation:
speed = distance/ time
s= 200/0.78= 256.41 ms^-1
by using v= (f) x ( lambda)
256.41/ 0.98 = f = 261.64 hz
