Which of the following would serve as the best time standard?
1.the rotation of Earth upon its axis
2.the vibration of a CS-133 atom
3.a grandfather clock
4.the buzzing of a mosquito
2
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The Big Dipper is an officially recognized constellation
Indicate whether the statement is true or false
Standing Sound Waves: An organ pipe open at both ends has a length of 0.80 m. If the velocity of sound in air is 340 m/s, what is the frequency of the second harmonic of this pipe?
A. 213 Hz B. 425 Hz C. 638 Hz D. 850 Hz
An electron is released such that its initial velocity is from right to left across this page. The electron's path, however, is deflected in a direction toward the bottom edge of the page due to the presence of a uniform magnetic field. What is the direction of this field?
a. from bottom edge to top edge of the page b. into the page c. from right to left across the page d. out of the page
Discuss the population, size, and types of galaxies we find in our Local Group
What will be an ideal response?