21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 1, Problem 31QP
(a)
To determine
The scientific notation of the given number.
(b)
To determine
The scientific notation of the given number.
(c)
To determine
The scientific notation of the given number.
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1. Number 0.02010 has how many significant figures?
a. 2
b. 3
C. 4
d. 5
e. Could be 3 or 4.
2. Which of the following numbers is written in correct scientific notation?
a. 56.4 x 102
b. 0.192 x 105
C. 2.34 x 10-34
d. 9.19 x 10-3.1
e. 8.29 x 10-3
3. When a ball is thrown vertically upwards in the air, acceleration the ball experiences:
a. Increases.
b. Decreases.
C. Increases, and then decreases.
d. Decreases, and then increases.
e. Remains the same.
4. Two cars, A and B, travel in the same direction on a highway. At one moment, car A has
a greater velocity than car B. This means at that moment:
a. Acceleration of car A is greater than that of car B.
b. Acceleration of car A is less than that of car B.
c. Acceleration of both cars are equal.
d. Only the magnitudes of the acceleration of both cars are equal.
e. There is not enough information to draw any conclusions regarding…
Express in scientific notation
(3 significant figures)
a) 56,000
b)0.000857
c) 29
d) 645.8
Conversions
e) 0.002384 vork-like questions
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Second H.W.pdf
1. Draw and label the vector with these components. Then determine the magnitude and
angle of the vector.
a- Az = 3 ,A, = -2
b- B, = -2 ,B, = 2
2. What is the speed of horse in meter per second that runs a distance of 1.2 miles in 2.4
minutes?
3. A car moving along X- axis according on the function:
X (t) = 2 t2 + 5t +7 on [1,2] Find:
a- The average velocity.
b- The acceleration at 3s.
4. Julie is walking around a track at a 2m/s for some exercise. She then decides to start
jogging so she accelerates at a rate of 0.5m/s? for 3 seconds.
How far did Julie travel from the time she started to accelerate to the end of the 3 seconds?
5. Ralph uses a 2000
to do this.
force to push his car along a road for 1000 m. It takes him500 s
a- Calculate the amount of work that Ralph did on the car.
b- Calculate the amount of power that he generated.
II
Chapter 1 Solutions
21st Century Astronomy
Ch. 1.1 - Prob. 1.1CYUCh. 1.2 - Prob. 1.2CYUCh. 1.3 - Prob. 1.3CYUCh. 1 - Prob. 1QPCh. 1 - Prob. 2QPCh. 1 - Prob. 3QPCh. 1 - Prob. 4QPCh. 1 - Prob. 5QPCh. 1 - Prob. 6QPCh. 1 - Prob. 7QP
Ch. 1 - Prob. 8QPCh. 1 - Prob. 9QPCh. 1 - Prob. 10QPCh. 1 - Prob. 11QPCh. 1 - Prob. 12QPCh. 1 - Prob. 13QPCh. 1 - Prob. 14QPCh. 1 - Prob. 15QPCh. 1 - Prob. 16QPCh. 1 - Prob. 17QPCh. 1 - Prob. 18QPCh. 1 - Prob. 19QPCh. 1 - Prob. 20QPCh. 1 - Prob. 21QPCh. 1 - Prob. 22QPCh. 1 - Prob. 23QPCh. 1 - Prob. 24QPCh. 1 - Prob. 25QPCh. 1 - Prob. 26QPCh. 1 - Prob. 27QPCh. 1 - Prob. 28QPCh. 1 - Prob. 29QPCh. 1 - Prob. 30QPCh. 1 - Prob. 31QPCh. 1 - Prob. 32QPCh. 1 - Prob. 33QPCh. 1 - Prob. 34QPCh. 1 - Prob. 35QPCh. 1 - Prob. 36QPCh. 1 - Prob. 37QPCh. 1 - Prob. 38QPCh. 1 - Prob. 39QPCh. 1 - Prob. 40QPCh. 1 - Prob. 41QPCh. 1 - Prob. 42QPCh. 1 - Prob. 43QPCh. 1 - Prob. 44QPCh. 1 - Prob. 45QP
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