Problem Set Four
1. . A car weighing 15,000 N is speeding down the highway at 90 km/h.
What is its momentum?
25 m/s
2. Two ice skaters stand face to face and "push off" and travel directly away
from each other. The boy has a velocity of 5 m/s and he weigh
Problem Set Ten
1. The primary of a step-up transformer connected to a 120 V source has 200 turns. If
the output is 480 V, how many turns does the secondary have?
800 turns
2. The primary of a step-down transformer connected to a 240 V source has 1000
tur
Problem Set Six
1. A certain sample of brass has a mass of 2 kg and a volume of 240 cm 3. What is its
density?
8.333g/ cm 3
2. A 50 gram bracelet is suspected of not being pure gold. It is dropped into a glass of
water and 4 cm3of water overflows. Is the
Problem Set Seven
1. You wish to heat 30 kg of water from 60C to 80C. How many kcal of heat are
necessary to do this? To how many kJ does this correspond?
600 kcal of heat; 2,512 kJ of heat
2. You submerge 100 grams of steel in 200 grams of water. If the
Problem Set Eight
1. How much heat must be removed from 500 grams of water at 0C to form ice at
0C?
40 kcal
2. How much heat is necessary to vaporize 100 grams of water at 100C to form steam
at 100C?
53.9 kcal
3. A 20.0 kg bag of dirt falls 10.0 m at a co
Problem Set Eleven
1. A periodic wave has a period of 0.40 s. What is the wave frequency?
2.5 Hz
2. Waves moving on a lake have a speed of 2 m/s and a distance of 1.5 m between adjacent crests. a.
What is the frequency of the waves? b. What is the period
Problem Set Five
1. Two 3 kg physical science textbooks on a book shelf are separated by 0.15 m. What
is the force of gravitational attraction between the books?
0.00000002692 N
2. What is the force of gravity between two 1000 kg cars separated by a dista
Problem Set Nine
1. An electric current through a wire is 4.0 Coulombs every 3.0 seconds. What is the
magnitude of this current?
1.33
2. There is a current of 0.83 Amps through a light bulb in a 120 Volt circuit. What is the
resistance of this light bulb?
Problem Set Twelve
1. Index of refraction is defined as the speed of light in a vacuum divided by the speed
of light in the medium. What is the index of refraction for glass? Speed of light c = 3.0
x 108 m/s. Speed of light in glass = 2.0 x 108 m/s.
1.5
2
Problem Set 13
1. What is the chemical symbol for:
a, carbon- C
b. chlorine- Cl
c. gold- Au
d. iron- Fe
2. Lithium has only two naturally occuring isotopes: lithiumi-6 and lithium-7. Lithium-6
has a mass of 6.01512 and makes up 7.42 percent of all natural
1. The primary of a step-up transformer connected to a 120 V source has 200 turns. If the output is 480
V, how many turns does the secondary have?
480/120=x/200x= 800turns
2. The primary of a step-down transformer connected to a 240 V source has 1000 tur
Question 1 (1 point)
If an object falls with constant acceleration, the velocity of the object must
Question 1 options:
continually change by varying amounts, depending on its speed.
be constant also.
continually decrease.
continually change by the same a
1. An automobile traveling at 25 km/hour has kinetic energy equal to 1 x 10 4J.
a. What is the mass of the car?
Speed = 25 km/hr = 6.94 m/s
Kinetic Energy = 0.5mv2
1 x 104 = 0.5m6.942
m = 415.25 kg
b. If the velocity of the car is increased to 45 km/hour,
Question 1 (1 point)
When the distance between two stars decreases by half, the force between them
Question 1 options:
stays the same.
decreases by one-half.
increases to four times as much.
increases to twice as much.
decreases by one-quarter.
Save
Quest
In this exercise, you will measure the diameters and circumferences of several circles to see what kind of
proportion is observed. To do this you will need six glasses, cups, or other circular containers of different
sizes.
For part 3 you will need to hig
Question 1 (1 point)
To change 50 g of boiling water to steam requires
Question 1 options:
50 calories.
more calories than is required to bring 50 g of ice at absolute zero to the boiling point.
500 calories
540 calories.
none of the above
Save
Question 2
Question 1 (1 point)
When a bimetallic bar composed of copper and iron strips is heated, the bar bends toward
the iron strip because
Question 1 options:
iron gets hotter before copper.
iron expands more than copper.
copper gets hotter before iron.
copper
Laboratory-Exercise 2
1.
Convert 500 km to inches.
a. 500km X cfw_3280.84 X cfw_12 inches = 19,685,040 inches
2.
Convert 1 day to hours, then to minutes, then to seconds.
a. 1 day = 24 hours
b. 24 hours = 1,440 minutes (24 * 60)
c. 24 hours = 86,400 secon
All matter can exist in three phases: solid, liquid, or vapor. Read the material in the material in the
section Heat and Phase Transition and then answer the following:
1. How many calories of heat are required to change 1 gram of ice at 0C to liquid wate
1. In a simple circuit a 6-volt dry cell pushes charge through a single lamp which has a resistance of
3 . According to Ohms law the current through the circuit is _2_ Amps.
2. If a second identical lamp is connected in series, the 6-volt battery must pus
Question 1 (1 point)
The power expended for a barbell raised 2.0 m in 2 s is
4 W.
8 W.
1 W.
not enough information
Question 2 (1 point)
A 4-kg ball has a momentum of 12 kgm/s. What is the ball's speed?
48 m/s
12 m/s
4 m/s
3 m/s
none of the above
Question
Know that luminous objects can be seen from the light that they emit and nonluminous
objects can be seen from the light that they reflect.
Know that when light encounters matter, the light may be reflected, absorbed or transmitted.
Know that when a ray
Quiz #3 cfw_ Review
1. Be able to solve simple problems involving free-falling bodies in a
gravitational field.
2. Be able to list the four types of Fundamental Forces in the Universe:
Gravity, The Electromagnetic Force, The Strong Nuclear Force, The Weak
Quiz #2 Review
Be able to perform unit conversions (base and derived).
Be able to rearrange a formula to solve for the indicated variable.
Be able to convert decimal numbers to scientific notation and vice versa.
Be able to define scalar and vector qu
1. Be able to describe what an element is and provide at least three examples. A pure substance that
cannot be decomposed into similar substances by chemical or physical means. Hydrogen-H,
Aluminum-Al, Helium-He
2. Be able to describe what a compound is a
Physical Science 1010 Sec. A02/A41 (Fall 2015)
Exam #2 Review
Know the items from Quiz #4 Review.
Know the items from Quiz #5 Review.
Know the charge associated with each subatomic particle.
Know how charges interact with one another (like repels like
1. Define: Accuracy-Measurement that is measured true to its value.
Precision-Degree to which a series of measurements or calculations are to one another.
2. Basic steps for scientific method: 1) What will happen 2) Form a Hypothesis Develop
experiment to