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Veseljchak [2.6K]
3 years ago
9

Which one of the following statements concerning momentum is true? Group of answer choices Momentum is a force. Momentum is a sc

alar quantity. The SI unit of momentum is kg *m^2/s. The momentum of an object is always positive. Momentum and impulse are measured in the same units.
Physics
1 answer:
gtnhenbr [62]3 years ago
3 0

Question:

Which one of the following statements concerning momentum is true? Group of answer choices

A.Momentum is a force.

B.Momentum is a scalar quantity.

C.The SI unit of momentum is kg *m^2/s.

D.The momentum of an object is always positive.

E.Momentum and impulse are measured in the same units.

Answer:

Correct answer is E.

Explanation:

A. Momentum is not force ,but force is rate of change of momentum , so this statement is wrong.

B. Momentum is a vector quantity , it has magnitude and direction as well.

So statement is wrong.

C. The SI unit of momentum is kg *m/s. Wrong statement.

D.Momentum of object may be negative positive or zero. So statement is correct.

E. Both momentum and impulse has unit kg *m/s. So statement is correct.

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With regard to pneumatic mechanical devices which afford protection against the formation of ice, which of the following stateme
Andreyy89

Answer:

the answer is The pneumatic mechanical device can only be used as a de-icing device.

Explanation:

An ice protection system prevents the formation of ice, or enables the aircraft to shed the ice before it can grow to a dangerous thickness. Ice protection systems are designed to keep atmospheric ice from accumulating on aircraft surfaces such as wings, propellers and engine intakes.

The pneumatic mechanical device is the Pneumatic deicing boots which was invented by the Goodrich Corporation in 1923. The pneumatic boot is usually made of layers of rubber, with one or more air chambers between the layers.

Any design which utilizes either a mechanical means of breaking the bond of ice to the surface, or which operates on a periodic cycle, is necessarily a de-ice system.

4 0
3 years ago
A satellite of mass 1000kg is in a circular orbit around a planet. The centripetal acceleration of the satellite in its orbit is
ludmilkaskok [199]

Answer: 5000N

Explanation:

The basic principle of a circular orbit is that Fg = m × ac, so as we have the mass and the centripetal acceleration (also called normal acceleration) we just have to operate. Fg = 1000kg × 5m/s² = 5000N

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3 years ago
What is the velocity (m/s) after 5 seconds of fall
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5 second fall starting at 0 m/s
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Which form of energy does flowing water possess
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4 0
2 years ago
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Compute the expected shell-model quadrupole moment of 209Bi () and compare with the experimental value, - 0.37 b
Over [174]

Answer:

0.22 b

Explanation:

Quadrupole moment of the nucleon is,

Q=-\frac{2j-1}{2(j+1)}\frac{3}{5}R^{2}

And also,

R^{2}=R^{2} _{0}A^{\frac{2}{3} }

And, R _{0}=1.2\times 10^{-15}m

Now,

Q=-\frac{2j-1}{2(j+1)}\frac{3}{5}R^{2} _{0}A^{\frac{2}{3} }

For Bismuth j=\frac{9}{2} and A is 209.

Q=-\frac{2\frac{9}{2} -1}{2(\frac{9}{2} +1)}\frac{3}{5}(1.2\times 10^{-15}) ^{2}(209)^{\frac{2}{3} }\\Q=0.628\times 35.28\times 10^{-30} \\Q=22.15\times 10^{-30} m^{2} \\Q=0.2215\times 10^{-28} m^{2} \\Q=0.22 barn

Therefore, the expected value of quadrupole is 0.22 b which is quite related with experimental value which is 0.37 b

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3 years ago
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