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Leokris [45]
2 years ago
5

The students on the right are applying a force of 100 N to the right. This is shown by the red arrow. The students on the left a

re applying a force of 100 N to the left. This is shown by the blue arrow. A student on the blue team loses balance and lets go of the rope. What is the most likely effect of this change?
A. The rope will move to the right, in the direction of the net force.

B. The rope will move to the left, in the direction opposite to the net force.

C. The rope will move to the left, in the direction of the net force.

D. The rope will move to the right, in the direction opposite to the net force.

Physics
2 answers:
kipiarov [429]2 years ago
6 0
The answer is D.
…………..
brilliants [131]2 years ago
4 0
I would say D because when you think about tug-of-war, when someone on one side lets go, the people on the other team are able to pull the rope further to their side. So the rope would move right to the side of the red team because someone on the blue team let go therefore, there is less balancing the rope on the blue teams side.
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A team of engineering students is testing their newly designed 200 kg raft in the pool where the diving team practices. The raft
elena-s [515]

Answer:

The water level rises more when the cube is located above the raft before submerging.

Explanation:

These kinds of problems are based on the principle of Archimedes, who says that by immersing a body in a volume of water, the initial water level will be increased, raising the water level. That is, the height in the container with water will rise in level. The difference between the new volume and the initial volume of the water will be the volume of the submerged body.

Now we have two moments when the steel cube is held by the raft and when it is at the bottom of the pool.

When the cube is at the bottom of the water we know that the volume will increase, and we can calculate this volume using the volume of the cube.

Vc = 0.45*0.45*0.45 = 0.0911 [m^3]

Now when a body floats it is because a balance is established in the densities, the density of the body and the density of the water.

Ro_{H2O}=R_{c+r}\\where:\\Ro_{H2O}= water density = 1000 [kg/m^3]\\Ro_{c+r}= combined density cube + raft [kg/m^3]

Density is given by:

Ro = m/V

where:

m= mass [kg]

V = volume [m^3]

The buoyancy force can be calculated using the following equation:

F_{B}=W=Ro_{H20}*g*Vs\\W = (200+730)*9.81\\W=9123.3[N]\\\\9123=1000*9.81*Vs\\Vs = 0.93 [m^3]

Vs > Vc, What it means is that the combined volume of the raft and the cube is greater than that of the cube at the bottom of the pool. Therefore the water level rises more when the cube is located above the raft before submerging.

7 0
4 years ago
When a piece of metal mass of 72.17 g is
nordsb [41]

Answer:

Explanation:

The trick is in finding the volume.

Final Volume = 26.64

Initial Volume=<u>20.92</u>                   Subtract

Metal Volume  5.72  cm^3

Density = mass / volume

Density = 72.17 / 5.72

Density = 12.617

7 0
2 years ago
An example of an indicator species is the sea otter. Without sea otters, sea urchins would overgraze on kelp beds, dramatically
sveticcg [70]

the answer is false

7 0
3 years ago
Read 2 more answers
-poopp poopoop jujuj
san4es73 [151]

Answer:

okay.........

Explanation:

3 0
3 years ago
Read 2 more answers
For the following statements, choose the word or words inside the parentheses that serve to make a correct statement. Each state
AnnyKZ [126]

Answer:

a) Temperatura, b) Temperature, c)    Constant , d)  None of these , e) Gibbs enthalpy and free energy (G)

Explanation:

a) the expression for ideal gases is PV = nRT

     Temperature

b) The internal energy is E = K T

      Temperature

c)  S = ΔQ/T

In an isolated system ΔQ is zero, entropy  is constant

       Constant

d) all parameters change when changing status

        None of these

e) Gibbs enthalpy and free energy

7 0
3 years ago
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