Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 1, Problem 42QAP
To determine
The value of light-second and light-hour in mm on scale; distance between Earth and Moon in mm; distance between Sun and Neptune in mm.
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1.34 light-years to miles (a light-year is an astronomical measure of the distance traveled by light in a year, or 365 days; the speed of light is 2.998 × 10^8 m ;1 km = 0.6125 mi) Part 2 of 3 mi Be sure your answer has the correct number of significant digits. 30.0 yd to centimeters (1 in = 2.54 cm) 2743.2 cm Part 3 of 3 Be sure your answer has the correct number of significant digits. 3.4×1010 cm S to ft X S (1 in = 2.54 cm)
in the second photo, when you plugged 6 in for t, shouldn't it be a = (9) - (0.25)(6)2? like since you're substituting it into the accel equation that you had in the first photo? but i don't know if that would work because then the accel would be 0
For this short response assignment, your job is to demonstrate your understanding of SI units and how they can be applied on an astronomical scale. To do this, answer each of the following with a brief explanation of the mathematics used to get there.The speed of light is 3*10^8 m/s (aka 300,000,000 meters per second). What is the speed of light in centimeters per second, kilometers per second, and miles per hour? (Hint: there are roughly 1.6 km per mile and 3600 seconds per hour) Remember to show the math; If light from the closest star to our solar system takes about 4.2 years to get to us, how far away is that star in units of Gm (aka Gigameters)? Again, explain your work.
Chapter 1 Solutions
Understanding Our Universe
Ch. 1.1 - Prob. 1.1CYUCh. 1.2 - Prob. 1.2CYUCh. 1.3 - Prob. 1.3CYUCh. 1 - Prob. 1QAPCh. 1 - Prob. 2QAPCh. 1 - Prob. 3QAPCh. 1 - Prob. 4QAPCh. 1 - Prob. 5QAPCh. 1 - Prob. 6QAPCh. 1 - Prob. 7QAP
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- A light-year (ly) is the distance light travels in one year (at speed of 2.998 ×× 108 m/sm/s ). An astronomical unit (AU) is the average distance from the Sun to Earth, 1.50 ×× 108 km. 1 year = 3.156 ×× 107 s. How many meters are there in 1.70 ly? Express your answer using three significant figures. Express in scientific notation! 1.70 ly = _________________m How many AU are there in 1.70 ly light-year? Express your answer using three significant figures. Express in scientific notation! 1.70 ly = _________________AUarrow_forwardA light-year is the distance that light can travel in one year. Similarly, we can define a light-second, light-day, etc. as the distance that light can travel in other time intervals. Calculate the distance represented by each of the following: (Assume that the speed of light is 3 × 108 m/s). 1. 4 light-seconds 2. 3 light-minutes 3. 2 light-days 4. 2 light-days, but this time answer in miles (enter just the number with no units)arrow_forwardone hundred milli- (100 times one one-thousandth): 102 ✕ 10−3 = 10(2 + [−3]) = 10(2 − 3) = 10−1 = 0.1 (100 ÷ 1,000 = 0.1) one hundred micro- (100 times one one-millionth): 102 ✕ 10−6 = 10(2 + [−6]) = 10(2 − 6) = 10−4 How do we write one hundred nano- (100 times one-billionth)? 102 ✕ 10−9 = 10 We write ten micrometers as follows. 10 ✕ 10−6 m = 10−5 m How do we write ten nanoseconds? 10 ✕ 10−9 s = 10 sarrow_forward
- A rectangular billboard in space has the dimensions 10 meters by 20 meters. How fast and in what direction with respect to the billboard would a space traveler have to pass for the billboard to appear square?arrow_forwardThe meter was redefined as a reference to Earth, then to krypton, and finally to the speed of light. Why do you think the reference point for a meter continued to change?arrow_forwardHow manyy microns make up 1.0km. What fraction of a centimeter equals to 1 micron How many microns arw in 1 yardarrow_forward
- If the speed of light is given as 299,792,458 meters per second and the wavelength is 478 nm. what is the frequency of this light? Give your answer in THz!arrow_forward1.5 How long is a 100-meter dash in feet?1.6 Convert 50 feet per second to miles per hour. 1.7 The speed limit in some countries is 100 kilometers per hour. How fast is thatin miles per hour?1.8 How many 60 watt lightbulbs are equivalent to one horsepower?1.9 Convert the temperature of 70◦F to ◦C.arrow_forwardUsing a single dimensional equation, estimate the number of steps it would take a person with a step length of 2.65 ft to walk from the Earth to Alpha Centauri a distance of 4.37 light-years. The speed of light is 1.86282 x 105 miles/s. Number of Steps = Enter your answer in accordance to the question statement x 1017arrow_forward
- How much time (in seconds) does it take light to travel 1.90 billion kmkm?arrow_forwardIn one sense, it's a relief that you got the same answer I did, so I must generally understand the concepts. However, the book says that the answer is 1.1m.arrow_forward1Which of the following best describes a frame of reference? an experiment that proved that Earth did not have an aether wind the theory that describes the behavior and characteristics of objects moving at relativistic speeds the effect of the slowing of time as an object moves with high speeds a point in which someone relates the behavior of an object from one perspective 2If an electron moves from n = 5 to n = 1, what wavelength of light is emitted? (h = 6.626 x 10-34, 1 eV = 1.6 x 10-19 J) 4008 nm 434 nm 95 nm 1281 nm 3Which of the following best describes a frame of reference? an experiment that proved that Earth did not have an aether wind the theory that describes the behavior and characteristics of objects moving at relativistic speeds the effect of the slowing of time as an object moves with high speeds a point in which someone relates the behavior of an object from…arrow_forward
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