If an object stores kinetic energy, the object must be _________

All nuclear energy results in the rapid release of energy, such as in atomic bombs.

Nimfa-mama [501]

<span>It is true that all nuclear energy results in the rapid release of energy, such as in atomic bombs. <span>A process wherein the atom’s nucleus is further divided into two nuclei, that is, fission products, is called nuclear fission. This happens when the nuclei of radioactive elements (e.g. Uranium or Plutonium isotopes) are able to attract neutrons. Because these isotopes’ nuclei are unstable, an addition to their energy causes them to divide into new pieces of neutron. In nuclear reactors, fission occurs when the power plant gathers heat from a steam in a physical process. Nuclear reactors are designed to sustain nuclear chain reactions.</span></span>

3 0

3 years ago

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A physical property that describes how something feels is called

Norma-Jean [14]

Physical properties are:
-odor
-shape
-texture
-hardness
Texture is the one which is responsible fo how something feels.

3 0

4 years ago

Water at 20 C flows through a 5-cm-diameter pipe that has a 180 vertical bend, as in Fig. P3.43. The total length of pipe betwee

Nataliya [291]

Answer:

F = 749 [N]

Explanation:

We must give full information on this problem, as well as the question that needs to be resolved.

Water at 20°C flows through a 5-cm-diameter pipe that has a 180° vertical bend. The total length of pipe between flanges 1 and 2 is 75 cm. When the weight flow rate is 230 N/s,

P1=165kPa

and

P2=134kPa

Neglecting pipe weight, determine the total force that the flanges must withstand for this flow.

We must make a U-shaped body diagram of the pipe in order to visualize the forces acting according to the pressures and the area of the pipe.

Then by means of the second law of motion of Newton, which says that the sum of the forces must be equal to the product of mass times acceleration, we can find the force Fp

Let us remember that pressure is defined as the divided force over the area, therefore:

F = P *A

where:

P = pressure

A = area

The product of the mass by acceleration, is equal to the product of the speed of the fluid by the mass flow, since we know the weight of the fluid we can find its mass flow.

$W_{flow}=230[N/s]\\W_{flow} =g*m_{flow}\\m_{flow} = W_{flow} / g\\m_{flow} = 230/9.81\\m_{flow}= 23.45[kg/s]$

In the function of the mass flow, we can find the velocity of the fluid, as we also know the diameter of the pipe

$m_{flow} = density*v*A\\where\\density = 1000[kg/m^{3}]\\ v= velocity[m/s]\\A = area [m^{2}]\\v=\frac{m_{flow}}{density*A} \\v=\frac{23.45}{1000*\frac{\pi}{4}*(5*10^{-2})^{2} } \\v= 11.94 [m/s]$