Answer:
15.7m/s
Explanation:
To solve this problem, we use the right motion equation.
Here, we have been given the height through which the ball drops;
Height of drop = 14.5m - 1.9m = 12.6m
The right motion equation is;
V² = U² + 2gh
V is the final velocity
U is the initial velocity = 0
g is the acceleration due to gravity = 9.8m/s²
h is the height
Now insert the parameters and solve;
V² = 0² + 2 x 9.8 x 12.6
V² = 246.96
V = √246.96 = 15.7m/s
Answer:
Option B
Explanation:
The correct answer is Option B
After leaving the spoon of copper , steel and wooden in the soup for several minute chef can grab Wooden spoon with bare hand.
Wooden material are insulator of heat means heat does not transfer through the wooden material.
where as heat transfer take place in steel as well as copper and chef will not be able to lift the spoon bare hand.
