To solve this we are going to use the formula for ideal mechanical advantage:
where
is the machine mechanical advantage
is the input distance
is the output distance
We know for our problem that
and
. Lets replace those values in our formula to find
:
The ideal machine advantage of the machine is 3. The inventor is claiming that the actual mechanical advantage of the machine is 4. Since the actual mechanical advantage takes into account energy losses, it is always less than the ideal mechanical advantage.
We can conclude that the developer's claim is false.
Answer:
A. sugar and phosphate groups
C. nitrogenous bases.
Answer : distance, d = 463.7 m
Explanation :
According to the given condition it can be assumed that the first echo would be heard from closest cliff. The second echo is from farther cliff and the third echo is from the reflection between the two cliffs.
Let the distance between the first cliff and the point of firing is x and y is the distance between the second cliff and the point of firing.
Then the first echo will travel 2x distance, second will travel 2y distance and third will travel 2x +2y.
So, using above data :
and
On solving :
x = 321.9 m and y = 141.8 m
Hence, total distance between two cliffs is d = 321.9 m + 141.8 m = 463.7 m
The ground exerts an equal force on the golf ball.