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PHY 265 Exam 1 with 69 Questions with Correct Answers.

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Publié le 1 novembre 2024
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PHY 265 Exam 1 with 69 Questions with Correct
Answers.
What is the Physics Primer?
a. A tutorial of the most important physics concepts covered in introductory physics
courses.
b. A detailed explanation of all of the mathematics you will use in your introcuctory physics
course.
c. A list of the most important formulas used in introductory physics courses.
d. A set of mathematics topics that are relevant to introductory physics courses. - Correct
Answer d. A set of mathematics topics that are relevant to introductory physics courses.

Determine the values of m and n when the following mass of the Earth is written in
scientific notation: 5,970,000,000,000,000,000,000,000 kg - Correct Answer m, n = 5.97,
24

Determine the values of m and n when the following average distance from the Sun to the
Earth is written in scientific notation: 150,000,000,000 mm. - Correct Answer m,n = 1.5, 11

Determine the values of m and n when the following charge of a proton is written in
scientific notation: 0.000000000000000000160 C. - Correct Answer m,n = 1.60, -19

Determine the values of m and n when the following average magnetic field strength of the
Earth is written in scientific notation: 0.0000451 T - Correct Answer m, n = 4.51, -5

The mass of a high speed train is 4.5×105 kg, and it is traveling forward at a velocity of
8.3×101 m/s. Given that momentum equals mass times velocity, determine the values of
mm and n when the momentum of the train (in kg⋅m/s) is written in scientific notation. -
Correct Answer m,n = 3.7,7

Given that average speed is distance traveled divided by time, determine the values of m
and n when the time it takes a beam of light to get from the Sun to the Earth (in s) is written
in scientific notation. Note: the speed of light is approximately 3.0×108 m/s. - Correct
Answer m,n = 5.0, 2

, In an experiment you are performing, your lab partner has measured the distance a cart
has traveled: 28.4inch. You need the distance in units of centimeter and you know the unit
equality 1inch=2.54centimeter. By which conversion factor will you multiply 28.4inch in
order to perform the unit conversion?
a. 2.54 centimeter/ 1 inch
b. 2.54 inch / 1 centimeter
c. 1 inch / 2.54 centimeter
d. 1 centimeter/ 2.54 inch - Correct Answer a. 2.54 centimeter/ 1 inch

You would like to know whether silicon will float in mercury and you know that can
determine this based on their densities. Unfortunately, you have the density of mercury in
units of kilogram/meter^3 and the density of silicon in other units: 2.33 gram/
centimeter^3. You decide to convert the density of silicon into units of kilogram/ meter^3 to
perform the comparison. By which combination of conversion factors will you multiply 2.33
gram/ centimeter^3 to perform the unit conversion? - Correct Answer 1 kilogram/ 10^3
gram × 1 centimeter/ 10^−2meter × 1 centimeter/ 10^−2 meter × 1 centimeter 10^−2
meter

You have negotiated with the Omicronians for a base on the planet Omicron Persei 7. The
architects working with you to plan the base need to know the acceleration of a freely
falling object at the surface of the planet in order to adequately design the structures. The
Omicronians have told you that the value is gOP7=7.29gOP7=7.29 flurg grom^2, but your
architects use the units meter second^2, and from your previous experience you know
that both the Omicronians and your architects are terrible at unit conversion. Thus, it's up
to you to do the unit conversion. Fortunately, you know the unit equality relationships: 5.24
flurg = 1 meter and 1 grom = 0.493 second. What is the value of gOP7 in the units your
architects will use, in meter/second^2? - Correct Answer gOP7 = 5.72
meter/ second^2

A student solving for the acceleration of an object has applied appropriate physics
principles and obtained the expression a = a1 + F/m where a1=3.00 meter/second2,
F=12.0 kilogram⋅meter/second2 and m=7.00 kilogram. First, which of the following is the
correct step for obtaining a common denominator for the two fractions in the expression in
solving for a? - Correct Answer a= (m/m⋅a1/1)+(1/1⋅F/m)

Next, based on the correct answer from Part A, which of the following is the correct
symbolic expression for a? - Correct Answer a= ma1+F/m

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