Describe a situation that uses the processes of the scientific method. Explain how the scientific processes are used in that situation.
Question 10
10.
What is the first step toward simplifying a complicated situation, and what are three ways to summarize a complicated situation?
Question 11
11.
Question 12
12.
Question 13
13.
Question 14
14.
Question 15
15.
Question 16
16.
Question 17
17.
Question 18
18.
Question 19
19.
How do significant figures indicate a measurement’s precision?
Question 20
20.
Calculate the area of a room whose length is 15.23 m and width is 8.7 m. Express your answer in scientific notation and with the correct number of significant digits correct unit.
Question 21
21.
Question 22
22.
Question 23
23.
Question 24
24.
Question 25
25.
Question 26
26.
Question 27
27.
Question 28
28.
Question 29
29.
Question 30
30.
Question 31
31.
Question 32
32.
The value of the speed of light is now known to be 2.997 924 58 x 108 m/s. Express the speed of light with three significant figures
Question 33
33.
The value of the speed of light is now known to be 2.997 924 58 x 108 m/s. Express the speed of light with five significant figures
Question 34
34.
The value of the speed of light is now known to be 2.997 924 58 x 108 m/s. Express the speed of light with seven significant figures
Question 35
35.
Perform the following calculation to the right number of sig figs:
Physics is concerned with which of the following matters?
applying physics principles
making predictions about a broad range of phenomena
all of the above
describing the physical world
Measuring temperature would most likely involve which major area in physics?
thermodynamics
vibrations and wave phenomena
relativity
optics
A physicist who studies the behavior of submicroscopic particles is working in which area within physics?
quantum mechanics
relativity
electromagnetism
mechanics
After making observations and collecting data that leads to a question, a physicist will then
formulate and test hypotheses by experimentation.
state conclusions.
revise the initial hypotheses.
interpret the results.
How many variables may be tested legitimately in any one experiment?
one
five
as many as a physicist can handle
three
Why do physicists use models?
They are usually easy to build.
They are helpful when explaining fundamental features.
They are usually inexpensive.
none of these
Which of the following represents a system?
picture hanging on the wall
flag blowing in the wind
ball rolling on the ground
all of these
Models can do all of the following except
help build hypotheses.
guide experimental design.
explain every aspect of natural phenomena.
make predictions in new situations.
What is the SI base unit for length?
a. meter
b. kilogram
c. kilometer
d. second
kilogram
kilometer
meter
second
What quantity does the kilogram measure?
time
distance
mass
force
In scientific notation, 674.3 mm equals
In scientific notation, 0.000 005 823 mg equals
all of these
The average mass of a proton is 1.673 ´ 10-27kg. What is this mass in grams?
The accepted value for free-fall acceleration is 9.806 65 m/s2. Which of the following measurements is the most accurate?
Precision describes
human error.
the lack of instrument calibration.
the limitations of the measuring instrument.
the relationship of a measurement to an accepted standard.
How many significant figures does 50.003 00 have?
seven
three
five
two
Based on the data from the Data Table 1, which of the following statements is correct?
As time increased, the temperature increased for both substances.
There is no relationship between heating time and temperature for either substance.
none of these
The temperature increased equally during each time period for both substances.
What does Graph 1 below show about the heating rate of substance A versus substance B?
all of these
Compared to substance B, substance A has a faster heating rate.
Substances A and B heat at different rates.
Compared to substance A, substance B has a slower heating rate.
Which of the following equations best shows the average relationship between temperature and time for substance B as given in Table 1 and Graph 1?
a. DT = 0.07(Dt) c. (DT)2 = 0.7(Dt)
b. DT = 0.07(Dt)2 d. DT = 7.4(Dt)
𝛥T = 0.07 (𝛥t)
𝛥T = 7.4 (𝛥t)
𝛥T = 0.07(𝛥t)^2
(𝛥T)^2 = 0.7 (𝛥t)
What does the symbol 𝛥m represent?
difference in motion 𝛥
change in mass
distance in meters
change in meters
What is the standard abbreviation for seconds?
t
s
sds
sec
All of the following are unit abbreviations except which one?
𝛥y
s
kg
m
If the final answer’s dimension is to be in length, which of the following operations is correct?
a.
b.
c.
d.
length x (length/time)
time x (length/time)
(time/length) x time
(time x length) - length
Using the order-of-magnitude method of calculation, estimate how long it would take a car moving at 109 km/h to travel 10450 km.
100 000 h
10 000 h
1000 h
100 h
A student measuring the mass of a standard brass mass labeled "50.0 g." When she measures the mass on a triple-beam balance, the balance reads 50.9 g, 51.0 g, 50.8 g, and 50.9 in four successive measurements. The equipment and the brass mass have recently been calibrated by a professional.
What is the most likely reason that her measurements don't agree with the label?
The standard mass is damaged and no longer has the same value.
The student is not using the equipment correctly.
The student forgot to zero the balance before starting the measurements.
They do agree with the standard, within experimental error.
A student plans to calculate the density of a solid brass square. When she measures the mass on a triple-beam balance, she gets 32.8 g, 32.0 g, 31.5 g, and 33.1 g in four successive measurements. The label states that the mass is 33.4 g. Since her mass measurements are different from the label, how will this affect her density calculation?
It won't have any effect since her weight measurement will differ also.
It won't have any effect since her volume measurement will differ slso.
Her density measurement will be a bit lower than if she used the label.
Her density measurement will be a bit higher than if she used the label.
A student measures the volume of a copper cylinder by displacing water in a graduated cylinder. In successive measurements, the student gets results of 32.2 mL, 32.4 mL, 31.8 mL, and 31.9 mL. What is the best way to record the resulting volume of the cylinder?