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3 years ago

The unit for atomic mass is A. Gram B. Amu C. Pound D. None of the above

Physics

2 answers:

Colt1911 [192]3 years ago

7 0

Answer:

The unit of atomic mass is Amu.

(B) is correct option.

Explanation:

Atomic mass :

The mass of a single atom of a chemical element.

An atom made by the proton, electron and neutron.

One atomic mass unit is explained by one by twelve of the mass of a single carbon - twelve atom.

We know that,

Gram is the unit of mass in C.G.S unit.

Amu is the unit of atomic mass.

Pound is the unit of mass in F.P.S units.

Hence, The unit of atomic mass is Amu.

DIA [1.3K]3 years ago

6 0

It's measured in Amu, so the answer is B.

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Gennadij [26K]

The trains take <u>57.4 s</u> to pass each other.

Two trains A and B move towards each other. Let A move along the positive x axis and B along the negative x axis.

therefore,

$v_A=90 km/h\\ v_B=-80 km/h$

The relative velocity of the train A with respect to B is given by,

$v_A_B=v_A-v_B\\ =(90km/h)-(-80km/h)\\ =170km/h$

If the train B is assumed to be at rest, the train A would appear to move towards it with a speed of 170 km/h.

The trains are a distance d = 2.71 km apart.

Since speed is the distance traveled per unit time, the time taken by the trains to cross each other is given by,

$t= \frac{d}{v_A_B}$

Substitute 2.71 km for d and 170 km/h for $v_A_B$

$t= \frac{d}{v_A_B}\\ =\frac{2.71 km}{170 km/h} \\ =0.01594 h$

Express the time in seconds.

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3 years ago

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zhenek [66]

Answer:

0.1 m

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As the energy of the system is conserved we have

$Fx=\dfrac{1}{2}kx^2$

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3 years ago

A man walks 7 km, east in 2 hours and 2 km in 1 hour in the same direction. a) what is

Rzqust [24]

Explanation:

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|v| = 3 km/hr

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v = 3 km/hr east

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3 years ago

A vessel that contains a gas has two pressure gauges attached to it. One contains liquid mercury, and the other an oil such as d

castortr0y [4]

Answer:

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3 years ago