Sunspot Observations Sunspots vary in number as a function of time, exhibiting an approximately 11-year cycle. Galileo made the first European observations of sunspots in 1610, and daily observations were begun in Zurich in 1749. At the present time we are well into the 23rd observed cycle. Part A What is the frequency of the sunspot cycle? Give your answer in Hz. Express your answer using two significant figures. —| ΑΣΦ f = Submit Provide Feedback Request Answer ? Hz

Sunspot Observations Sunspots vary in number as a function of time, exhibiting an approximately 11-year cycle. Galileo made the first European observations of sunspots in 1610, and daily observations were begun in Zurich in 1749. At the present time we are well into the 23rd observed cycle. Part A What is the frequency of the sunspot cycle? Give your answer in Hz. Express your answer using two significant figures. —| ΑΣΦ f = Submit Provide Feedback Request Answer ? Hz

Stars and Galaxies (MindTap Course List)

10th Edition

ISBN:9781337399944

Author:Michael A. Seeds

Publisher:Michael A. Seeds

Chapter19: Astrobiology: Life On Other Worlds

Section: Chapter Questions

Problem 9P

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1. Compare the uncertainties associated with the diameter and circumference measurements. What happens to the value of uncertainty as the SSD becomes smaller? 2. Why millimeter gave the most precise readings? Explain your answer.
Sakalam, a light-emitting device, requires 10,068.68 ZW (Zeptowatt) of power every 500 milliseconds (ms). The energy of light being produced by Sakalam is equal to the amount of energy required to run the device at the given time. Refer to the given tables for the useful relations, necessary constants and definitions of variables, and colors corresponding to wavelengths of visible light. a. How much energy (in Joules) is equivalent to the power required by Sakalam at the given time? b. What is the wavelength of light (in nanometers, nm) being produced by Sakalam? c. What is the color of the light being produced by Sakalam?
A bat flying at 5.00 m/s is chasing an insect flying in the same direction. The bat emits a 40.0 kHz chirp and receives back an echo at 40.4 kHz. Assume the speed of sound is 343 m/s. 1. What is the equation for doppler shift? 2. If you were calculating the frequency of the chirp observed by the insect, what would the value of fs be? 3. For question 2, would vo represent the velocity of the bat or the insect? Does the motion of the insect increase or decrease the frequency observed by the insect? Would vo be positive or negative? 4. For question 2, would vs represent the velocity of the bat or the insect? Would vs be positive or negative? 5. Write the doppler shift equation to find the frequency of the chirp observed by the insect. Use fi for the frequency observed by the insect and vi for the velocity of the insect. (Do not solve this equation yet.) 6. If you were calculating the frequency of the chirp observed by the bat, what would the value of f0 be? 7. For question 6, what would…
Convert 13.7 billion yeans (the age of the Universe) to the appropriate SI unit. Be sure to report your answer with the correct number of significant figures.
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1. Unit conversion You travel 300 kilometers on 20 liters of gasoline at $4.00 per liter. About how many dollars did it cost to drive a mile? There are 1.609 km in 1 mile. 2. Power analysis For a given amount of energy, be able to calculate how long it can power something (how long can X Joules power a device that uses Y Megawatts, for example). 3. One-dimensional Motion Ask yourself this question: which kinematic equation would you use to solve for the an object if you knew and any four of the five kinematic quantities and choose in the right equation (A) Ar=v₁t+at² (B) Ar=₁+t (C) vf = v₁ + at (D) Av=v² + 2aAr MacBook Pro of ? Be able to pick
straig curve a. ( Start with the es -2.5% y. t the end of th d of the U-tur east or west c 1 Express the following using i and j notation/units/are part of the answers. (+12) ers you used 0. (b) Ã + B =O 31012 (b) A+ D (c) Ē – = 0369 0273 -15 (d) 3C = (e) What is the magnitude of vector B ? (1) Write an expression for the direction 0 of vector B, measured counterclockwise from the positive x direction. -2 15 0.75 OVER ot
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2 FEBIT-MAT12A/MAT126A/WIS22/ For questions 1- 3, suppose that in cr? we have that the error in measuring r and L are ±2% and ±5% respectively. 1. The formula for the error in the calculated value of s is 2. Consider the statements (decide upon the correctness of them): dr dL ±5% dt (i) Ar =±2%r; AL=±5%L; (ii) =+2%; dt 3. Consider the statements (decide upon the correctness of them): (i) The minimum error in s is 6% (ii) The maximum error in s is 14% For questions 4 - 7 consider the function z=9-2x+4y – x? – 4y?
Problem 3 An asteroid closely passes the Earth at a range of 17200 mi and relative speed of 7.8 km/s. The diameter is estimated at 30 m with a specific gravity of 3. If this asteroid had impacted Earth, how much energy would have been released? Express this quantity in units of mega- tons (Mton) where a megaton is the energy released by one million metric tons of TNT explosive. A metric ton is 1000 kg and the explosive energy density of TNT Hint: If the asteroid hits the Earth, its relative velocity becomes zero. Ignore any change in asteroid velocity due to gravitational acceleration or air resistance. 4184 J/g.
I need help with the calculations on the bottom of the page Equation 2: (Cw)(mw)(Tf-Tiw) = -(Cm)(mm)(Tf-Tim) Equation 3: MM = 25/c