1 of 3
http://www.nathandawson.org/HW01/HW.php?username=test&ynumbe...
Welcome to the homework page test. If this isn't you then please go back to the homework login page homework login page.
You may log out and return later if you wish without losing any saved data. You will have TEN attempts for each assigned problem. Every unsuccessful attempt will lower that part of
the problem's value by 5%.
For example, if you get it right on the first try, then you will receive 100% for that problem. If you are twice incorrect and submit the correct on the third try, then you will receive a
90% for that part of the problem. You will not recieve any points for that part of the problem after 10 attempts.
You do not have to answer all the problems during a single session or in any particular order. To answer a problem simply type the numerical value in the box provided, check the box to
the right of the part(s) you want to answer, and then click the submit button. You can freely log in and out of the homework page without losing any submitted information so feel free
to take breaks if necessary.
LETS BEGIN!
Problem #1
The number 0.0034 has how many significant figures?
Answer the question
Attempted the question 0 times.
There have been no attempts to answer the question
Problem #2
How many significant figures are there in 1.253 + 17.4?
Answer the question
Attempted the question 0 times.
There have been no attempts to answer the question
Problem #3
In the above table, find the number of significant figures for (a) AG × BG, (b) AH + BH, (c) BG × ( AG + BH ), and (d) BG × AH + AG.
(a)
Answer part (a)
(b)
Answer part (b)
(c)
Answer part (c)
(d)
Answer part (d)
Attempted part (a) 0 times, part (b) 0 times, part (c) 0 times, and part (d) 0 times.
There have been no attempts to answer part (a)
There have been no attempts to answer part (b)
There have been no attempts to answer part (c)
There have been no attempts to answer part (d)
Problem #4
(a) How many significant figures are in the solution to 1245 × 0.756 × π ? (b) How many significant figures are in the solution to 1.2 × 0.08454 × 0.003496 + 965.4 × 0.4570?
(a)
Answer part (a)
5/22/2016 12:56 AM
2 of 3
http://www.nathandawson.org/HW01/HW.php?username=test&ynumbe...
(b)
Answer part (b)
Attempted part (a) 0 times and part (b) 0 times.
There have been no attempts to answer part (a)
There have been no attempts to answer part (b)
Problem #5
A light-year (ly) is the distance light travels in one year (at a speed of 2.998 × 108 m/s). An astronomical unit (AU) is the average distance from the Sun to the Earth, where 1 AU = 1.50
× 108 km. (a) How many meters are there in 5.30 ly? (b) How many AU are there in 5.30 ly light-year?
(a)
× 1016 m
Answer part (a)
(b)
× 105 AU
Answer part (b)
Attempted part (a) 0 times and part (b) 0 times.
There have been no attempts to answer part (a)
There have been no attempts to answer part (b)
Problem #6
A probe measures the gravitational acceleration on the surface of a large asteroid to be 0.064m/s2. An astronomer then estimates the gravitational acceleration at the surface of a brown
dwarf to be 4800m/s2 . What is the order of magnitude difference between the gravitational acceleration on the brown dwarf and that on the asteroid?
Answer the question
Attempted the problem 0 times.
There have been no attempts to answer the problem
Problem #7
Force is defined as an object's mass multiplied by the acceleration. If an object weighs 45.7 N (where N = kg m/s2 and is a measurement of force called a Newton) and the acceleration
of gravity is 9.80 m/s2, then what is the number of significant figures after solving for the mass?
Answer the question
Attempted the problem 0 times.
There have been no attempts to answer the problem
Problem #8
A triangle has angles A = 72.3o, B = 23.2o, and C = 84.5o. A radian is a natural unit where approximately 3.141592 radians = 180o . (a) What is the value of A in radians? (b) What is
the value of B + C in radians?
(a)
radians
Answer part (a)
(b)
radians
Answer part (b)
Attempted part (a) 0 times and part (b) 0 times.
There have been no attempts to answer part (a)
There have been no attempts to answer part (b)
Problem #9
Global positioning satellites (GPS) can be used to determine positions with great accuracy. The system works by determining the distance between the observer and each of several
satellites orbiting Earth. (a) If one of the satellites is at a distance of 20,000 km from you, what percent accuracy in the distance is required if we desire a 2 meter uncertainty? (b) How
5/22/2016 12:56 AM
3 of 3
http://www.nathandawson.org/HW01/HW.php?username=test&ynumbe...
many significant figures are needed in the distance?
(a)
%
(b)
Answer part (a)
Answer part (b)
Attempted part (a) 0 times and part (b) 0 times.
There have been no attempts to answer part (a)
There have been no attempts to answer part (b)
Problem #10
An island 1.0 km wide and 6.0 km long receives 1.0 cm of rain in a 2.0 hour period. How many metric tons (1 ton = 103 kg) of H2O fell on the city? (1 cm3 of H2O has a mass of 1
gram = 10-3 kg.)
metric tons
Answer the question
Attempted the problem 0 times.
There have been no attempts to answer the problem
Problem #11
(a) How many centimeters are there in a length 70.4 inches? (b) Suppose that a particular artillery piece has a range R = 9640 yards. What is its range in miles (1 mile = 5280 ft and 3 ft
= 1 yard)? (c) What is the speed of a car going v = 1.000 mph in SI units (1 mile = 1609 m and 1 hour = 3600 s)?
(a)
cm
Answer part (a)
(b)
mi
Answer part (b)
(c)
m/s
Answer part (c)
Attempted part (a) 0 times, part (b) 0 times, and part (c) 0 times.
There have been no attempts to answer part (a)
There have been no attempts to answer part (b)
There have been no attempts to answer part (c)
Problem #12
Albert uses as his unit of length (for walking to visit his neighbors or plowing his fields) the Albert (A), the distance Albert can throw a small rock. One Albert is 63 meters. How many
square Alberts is equal to one acre? (1 acre = 43,560 ft2 = 4050 m2)
A2
Answer the question
Attempted the problem 0 times.
There have been no attempts to answer the problem
5/22/2016 12:56 AM