He worked with Euler on elasticity and the development of the Euler-Bernoulli beam equation.
What happens when the light hits the glass depends on what it was in before it hit the glass.
WHILE it's in the glass, the speed of light doesn't change.
Answer:
increased by 9 times
Explanation:
As the period of a simple pendulum is defined as the following formula

where L is the length of the pendulum and g is the constant gravitational acceleration. Since L is under a square root, if you want to triple the period of vibration, L must be increased by 9 times so that 
Answer: all except 3, 5, and 6
Explanation: these 3 options are all positive effects. fewer extinctions would mean fewer loss of animal life, and a decrease in mining and water pollution would be less harmful to the environment