Waves of amplitudes 0.4 m and 0.3 m interfere while traveling in the same direction with the same speed. If the wavelengths are the same, what are the resulting largest and smallest amplitudes possible?

1.0.7 m and 0.5 m
2.0.7 m and 0.1 m
3.0.5 m and 0.35 m
4.0.5 m and 0.1 m


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Physics & Space Science

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A series LR circuit includes a 9.0 V battery, a resistance of 0.50 and an inductance of 0.80 H. What is the energy stored by the inductor 2.0 s after the switch is closed?

A. 33 mJ B. 30 mJ C. 13 J D. 66 J E. 33 J

Physics & Space Science

The surface area of Antarctica is 13.2 million square kilometers. If 1 acre is equivalent to 4047 what is the surface area of Antarctica in acres?

a.
b.
c.
d.
e.
f.

Physics & Space Science

How many forces operated in the universe during the GUT era?

A) one, what we call the "super force" B) two, gravity and the GUT force C) two, gravity and the electroweak force D) three, gravity, the strong force, and the electroweak force E) all of the above forces

Physics & Space Science

According to Einstein's theory of relativity, the universe is made of

A) matter and anti-matter. B) radiation. C) energy. D) popcorn. E) matter.

Physics & Space Science