Answer:
More work done with less power
The increase in gravitational energy is the same as the height which is a function of gravitational energy is the same in both cases
Explanation:
Climbing the mountain in zigzag pattern is easier because
1. The time it takes to climb increases so that the required power or rate of doing work decreases
2. Climbing in zigzag pattern affords the use of leverages by the sides
3. Similar mechanical power gain and efficiency from using a drive screw instead of a nail to fasten items together can be achieved
The increase in gravitational energy is the same gravitational energy ~ mass × gravity ×height
Let's call the first number n, and the second number m.
n = 2m + 9 (9 more than twice the second number)
If the sum is 129, that means n + m = 129.
Now we can substitute the first expression (n = 2m + 9) into the second expression (n + m = 129), replacing the n.
(2m + 9) + m = 129
3m + 9 = 129
3m = 129 - 9
3m = 120
m = 120/3
m = 40
Now that we know m, we can find out n by replacing the m with 40 in the first expression (n = 2m + 9):
n = 2(40) + 9
n = 80 + 9
n = 89.
Therefore, n = 89, and m = 40.
Answer:
Explanation:
Given:
- depth of fish,
- angle of incidence,
- refractive index of water,
<u>Apparent distance from the normal projection at the bottom of entrance at air-water surface to the fish:</u>
<u>Now according to Snell's Law:</u>
<u>Now the actual distance of the fish from the bottom surface at the normal:</u>
<u>Now distance between bullet hole and fish</u>:
