Our Galaxy is called the _____
A) Andromeda Galaxy
B) Cartwheel Galaxy
C) Milky Way Galaxy
D) Pinwheel Galaxy
C
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We can rule out a connection between changes in the Sun's luminosity and the global warming that is currently occurring on Earth because
A) the Sun's luminosity has remained fairly steady even as Earth's temperature as increased. B) the Sun is too far away to affect Earth's climate. C) changes in the Sun's luminosity cannot occur on the time scale over which global warming has occurred. D) Earth's atmosphere prevents changes in the Sun's luminosity from having any effect on Earth's surface.
A Doppler red shift indicates
a. a shift toward lower frequencies. b. a shift toward longer wavelengths. c. that a light source is receding relative to the observer. d. all of these.
Doppler Effect: The sound from the whistle of a truck moving at 17.0 m/s toward a cliff reflects from the cliff and is heard by the driver of the truck. When it is parked at the side of the road, the whistle from the truck produces sound of frequency 2.267 kHz. As observed by the driver of the truck, what is the change in frequency the sound from the whistle due to the reflection? The speed of sound is 343 m/s.
A. 236 Hz B. 228 Hz C. 207 Hz D. 118 Hz E. 472 Hz
An artillery shell is fired with an initial velocity of 300 m/s at 55.0° above the horizontal. It explodes on a mountainside 42.0 s after firing. If x is horizontal and y vertical, find the (x, y) coordinates where the shell explodes.
What will be an ideal response?