A=95%
(450/475)*100=94.7% which rounds to 95%
Answer:
B. The speed of sound in stone is slower than in wool.
Explanation:
A. All materials can transmit sound. True
Solids, liquids and gases can transmit sound even though the degree of transmission varies.
C. Sounds cannot move in vacuum. True
Sound cannot transmit in space. You can prove it using the "bell jar" experiment.
D. Sound loses its energy as it travels. True
A major positive is that a life on earth could not exist without the greenhouse effect. If the atmosphere did not retain heat, our planet would be in habitable to plants and animals. Carbon dioxide is a greenhouse gas, but it is. Pretty much the weakest one of their is. All other greenhouse gases are turned in how many times more effective the gas is then carbon dioxide. Water vapor and sulfur oxides are some examples of more potent greenhouse gases.
Answer
given,
mass of the solid door = 22 Kg
dimension of door = 220 cm x 91 cm
moment of inertia about the hinge
r is the distance from the one edge which is equal to 91 cm or 0.91 m
Moment of inertia about center for rectangular gate is equal to
moment of inertia for rotation about a vertical axis inside the door, 15 cm from one edge