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Leya [2.2K]
4 years ago
5

A rectangular trough, 2.0 m long, 0.70 m wide, and 0.40 m deep, is completely full of water. One end of the trough has a small d

rain plug right at the bottom edge.When you pull the plug, at what speed does water emerge from the hole?
Physics
1 answer:
Stella [2.4K]4 years ago
8 0

Answer:

speed does water emerge from the hole v= 2.8 m/sec

Explanation:

the depth of the  rectangular trough h = 0.40 m   full of water

Also, given One end of the trough has a small drain plug right at the bottom edge.

we have to find the speed does water emerge from the hole.

This can be done using law of conservation of energy

the potential energy of water will be converted into kinetic energy as

\frac{1}{2}mv^2= mgh

⇒v= \sqrt{2gh}

h= depth, g= acceleration due to gravity and v= velocity of water from the hole

plugging the values

v= \sqrt{2\times9.81\times0.40}

v= 2.8 m/sec

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the base of a rectangular vessel measure 10m by 18cm. water is poured into a depth of 4cm. (a) what is the pressure on the base?
Alex787 [66]

Answer:

a) P =392.4[Pa]; b) F = 706.32[N]

Explanation:

With the input data of the problem we can calculate the area of the tank base

L = length = 10[m]

W = width = 18[cm] = 0.18[m]

A = W * L = 0.18*10

A = 1.8[m^2]

a)

Pressure can be calculated by knowing the density of the water and the height of the water column within the tank which is equal to h:

P = density * g *h

where:

density = 1000[kg/m^3]

g = gravity = 9.81[m/s^2]

h = heigth = 4[cm] = 0.04[m]

P = 1000*9.81*0.04

P = 392.4[Pa]

The force can be easily calculated knowing the relationship between pressure and force:

P = F/A

F = P*A

F = 392.4*1.8

F = 706.32[N]

4 0
3 years ago
What three categories can every living thing in a forest ecosystem be sorted into
juin [17]

Answer:

Producers

Consumers

Decomposers

Explanation:

The three categories in which every living thing in a forest ecosystem can be sorted into are producers, consumers and decomposers.

The producers as the name implies manufactures food for the whole of the ecosystem. They take inorganic materials from the environment and convert them into useful food materials. All plants are producers and some micro-organisms.

Animals are consumers and they take up the produced food for their own nourishment and life activities.

Decomposers recycles materials in the ecosystem by converting wastes generated by producers and consumers into useful products that returns to the atmosphere or replenishes soil nutrients.

4 0
4 years ago
A car on a straight road starts from rest and accelerates at 1.0 meter per second? for 10. seconds.
Marysya12 [62]

Answer:

11 or 10 meters a second

Explanation:

pretty sure thats my explanation "pretty sure" like my confidence? mark me brainliest bad at spelling lol

7 0
2 years ago
Here is an acceleration vs. time graph. what is the change in velocity between 2s and 4s?​
yulyashka [42]

Explanation:

From 2s, velocity increased gradually up to 4s

5 0
4 years ago
The same net force is applied to two bodies. The first body acquires half of the acceleration of the second body. What is the re
Yanka [14]

The mass of the first body is double the mass of the second body.

This all revolves around Newtons 2nd law of motion that states F=m*a.

If we understand that body one has the same force applied but half of the acceleration than body two, we can easily understand that it has to do something with the objects mass. This is because mass and acceleration in newtons 2nd law are inversely proportional. This means if and objects force stays the same, but it’s mass doubles, then the acceleration must be half its original value. And if the acceleration doubles and the force stays constant than the mass must have halved from its original value. It sounds quite complicated but it’s very simple. Hopefully this helps!!!

4 0
3 years ago
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