Question

8.98 galaxy types
complete the sentence below
the sun is located on the __________ of a
(center, arm, leg, tail)
__________ shaped galaxy.
(irregular, spiral, elliptical)
8.10c typhoons and hurricanes
which is not needed for a hurricane to form?
a warm ocean water
b low pressure
c the spinning of the earth (coriolis effect)
d location near poles
use the image for the last 2 questions.
electromagnetic spectrum and wave diagram
8.8a wavelengths
explain what happens to the frequency and
the energy as the wave gets shorter.
when the wavelength of a wave gets
shorter, the frequency __________
and the energy __________.
compare the wavelengths of
microwaves and gamma rays.
microwave has a wavelength of
__________ whereas,
gamma rays have a wavelength of
__________.

Explanation:

8.98 Galaxy Types

The Sun is in the Milky Way, a spiral galaxy, and located on one of its arms. Spiral galaxies have arms, and the Sun is in the Orion Arm.

Hurricanes form over warm ocean water, need low pressure, and the Coriolis effect (Earth’s spin). Poles are too cold and lack warm water, so location near poles is not needed.

From the electromagnetic spectrum diagram, shorter wavelength means higher frequency (since \( c = \lambda f \), \( c \) constant) and higher energy (since \( E = hf \), \( h \) constant).

Step1: Recall wave - frequency - energy relations

The speed of an electromagnetic wave \( c=\lambda f\) (where \(\lambda\) is wavelength, \(f\) is frequency, and \(c\) is the speed of light, a constant). The energy of a photon of the wave is given by \(E = hf\) (where \(h\) is Planck's constant, a constant).

Step2: Analyze the effect of shorter wavelength

When \(\lambda\) (wavelength) gets shorter, from \(c=\lambda f\), since \(c\) is constant, \(f\) (frequency) must increase. From \(E = hf\), since \(h\) is constant and \(f\) increases, \(E\) (energy) must also increase.

Answer:

The Sun is located on the \(\boldsymbol{\text{arm}}\) of a \(\boldsymbol{\text{spiral}}\) shaped galaxy.

8.10C Typhoons and Hurricanes