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REY [17]
3 years ago
14

What is the frequency of blue light that has a wavelength of 450 nm?

Physics
1 answer:
Gennadij [26K]3 years ago
8 0

Explanation:

The frequency of blue light that has a wavelength of 450 nm is 6.7×1014 6.7 × 10 14 Hz.

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Why do some astronomers object to the new definition of a planet that was adopted in 2006?
cestrela7 [59]

Answer:

A. New space missions show that Pluto is much larger than originally thought.

Explanation:

The new definition of a planet that was adopted in 2006, defined planet as  an object that orbits the sun, with sufficient mass to be round, not a satellite of another object, and has removed debris and small objects from the area around its orbit.

This new definition of a planet that was adopted in 2006, classified Pluto as "dwarf planet", because Pluto meets planetary criteria except that it has not cleared debris from its orbital neighborhood.

However, new Horizons spacecraft flew by Pluto in 2015, revealed that Pluto is much larger than originally thought

Therefore, the correct option is "A"

A. New space missions show that Pluto is much larger than originally thought.

4 0
4 years ago
A low C (f = 65Hz) is sounded on a piano. If the length of the piano wire is 2.0 m and its mass density is 5.0 g/m2, determine t
Pie

Answer:

338N

Explanation:

Use the formula f=\frac{\sqrt{\frac{T}{\frac{M}{L}} } }{2L}

f is the frequency, T the string tension, M the mass, and L the length

convert units to seconds, kilograms, meters

65Hz\ =\ \frac{\sqrt{\frac{T}{\frac{0.005kg}{m}}}}{2\cdot2m}

now solve for T

sqrt(T/.005) = 65*4 = 260

T = 338N

8 0
3 years ago
You measure the velocity of a drag racer that accelerates with constant acceleration. You want to plot the data and determine th
Ivenika [448]

Answer:

a) Linear equation

Explanation:

Definition of acceleration

a=\frac{dv}{dt}\\

if a=constant and we integrate the last equation

v(t)=v_{o}+a*t

So the relation between the time and the velocity is linear. If we plot the velocity in function of time, the plot is a line, and the acceleration is the slope of this line.

8 0
3 years ago
In complete sentences, describe what causes the phases of the moon. (4 points)
g100num [7]
The light from the sun is reflected by the moon, we see the part of the moon that the sun shines on.The change in the phases are created from the rotation of the moon around earth.We see a full moon when the sun is opposite of the moon. The side the sun shines on the moon is what we see.
7 0
3 years ago
Which scenarios are examples of physical change?​
Oxana [17]

Answer:

For example: Freezing, boiling, are physical

Explanation:

3 0
4 years ago
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