Answer:
The buoyant force increases as the submersible enters the water, and it remains constant after the submersible is completely immersed.
Explanation:
The buoyant force acting on an object is given by:
![B=\rho_L V_{imm} g](https://tex.z-dn.net/?f=B%3D%5Crho_L%20V_%7Bimm%7D%20g)
where
is the density of the liquid
is the volume of the object immersed in the liquid
g is the gravitational acceleration
From the formula, we see that as
increases, the buoyant force increases as well. Therefore, as the submersible is lowered into the water, the buoyant force gradually increases (because the immersed volume increases); however, when the submersible is completely immersed,
no longer changes, so the buoyant force remains constant.
Answer:
potential
Explanation:At this point the energy is stored in a form called potential energy. This means that the system has the potential to do work or to become active thanks here to the weight's position high above the lowest point of its swing.
Answer:
- 3 cm
Explanation:
From the mirror formula;
1/f = 1/v + 1/u ; where f is the focal length, v is the image distance, and u is the object distance.
1/-4.5 = 1/9 + 1/v
1/v = -1/4.5 - 1/9
= -1/3
Therefore;
v = -3 cm
Hence;
Image distance is - 3cm
Answer:
![\frac{dAB}{dt} = = 50 miles/ hour](https://tex.z-dn.net/?f=%5Cfrac%7BdAB%7D%7Bdt%7D%20%3D%20%3D%2050%20miles%2F%20hour)
Explanation:
let A represent me and B represent my friend
A speed
=30 m/hr toward west
B speed
=40 m/hr toward south
after 1/2 hr
total distance cover by A =1/2 * 30 miles = 15 miles
total distance by B = 1/2*40 miles = 20 miles
now from figure
![AB = \sqrt{(15^2+20^2)} = 25 miles](https://tex.z-dn.net/?f=AB%20%3D%20%5Csqrt%7B%2815%5E2%2B20%5E2%29%7D%20%3D%2025%20miles)
![AB^2 =OA^2+ OB^2](https://tex.z-dn.net/?f=AB%5E2%20%3DOA%5E2%2B%20OB%5E2)
Differentiate above equation
![2AB\frac{dAB}{dt} = 2OA\frac{dOA}{dt} +2OB\frac{dOB}{dt}](https://tex.z-dn.net/?f=2AB%5Cfrac%7BdAB%7D%7Bdt%7D%20%3D%202OA%5Cfrac%7BdOA%7D%7Bdt%7D%20%2B2OB%5Cfrac%7BdOB%7D%7Bdt%7D)
![25*\frac{dAB}{dt} = 15*30 +20*40](https://tex.z-dn.net/?f=25%2A%5Cfrac%7BdAB%7D%7Bdt%7D%20%3D%2015%2A30%20%2B20%2A40)
![\frac{dAB}{dt} = \frac{1250}{25}](https://tex.z-dn.net/?f=%5Cfrac%7BdAB%7D%7Bdt%7D%20%3D%20%5Cfrac%7B1250%7D%7B25%7D)
![\frac{dAB}{dt} = = 50 miles/ hour](https://tex.z-dn.net/?f=%5Cfrac%7BdAB%7D%7Bdt%7D%20%3D%20%3D%2050%20miles%2F%20hour)