Download Freezing Point of Water

Spring Final Study Packet
Measuring Heat
1. The freezing point of water is 0 °C and the boiling point is 100 °C.
2. The freezing point of water is 32 °F and the boiling point is 212 °F.
3. Temperature is the measurement of the average kinetic energy of a
substance.
4. Energy is the ability to do work. Joule is the unit in which this is measured in.
5. Thermal Energy is the total energy stored in an object due to changes in
temperature. That is, it’s the sum of all the kinetic and potential energy of the
molecules of a substance.
6. Thermal Energy depends on three things: specific heat, mass and changes in
temperature
7. Draw arrows to indicate where heat would move from one object to the other
in the following diagrams
Arrows
between the
air and the ice
Write the correct term for each definition
8. the amount of heat energy needed to raise the temperature of a
substance; specific to each material specific heat
9. the quantity of heat needed to increase the temperature of one pound
of water by one degree Fahrenheit British thermal unit (BTU)
10. standard scientific temperature measurement, which includes absolute
zero, the temperature at which all kinetic motion is said to stop kelvin
11. the measure of average kinetic energy in a material
temperature
12. 100 divisions between the freezing point of water and the boiling
point°C
13. 180 divisions between the freezing point of water and the boiling point
°F
14. A sample of aluminum absorbs 330 calories of heat. If the temperature
changes 15°C, how much aluminum is in the sample?
(specific heat is 0.22 cal/g°C)
100 g
How much energy is required to heat 35 grams of gold from 10°C to 50°C?
(specific heat is 0.03 cal/g°C) 40 cal
15.
Convert 79°C into Fahrenheit: 170 °F
16.
Convert 583K into Celsius : 310. °C
17.
Convert 59°F into Celsius: 15°C
Spring Final Study Packet
Heat Transfer
1. Conduction is the transfer of energy direct contact.
2. Convection is the transfer of energy through a fluid.
3. Radiation is the transfer of energy through a vacuum.
4. Any material that can flow is a fluid.
5. The method used by scientists to determine the amount of energy in food
is called calorimetry.
6. From the electromagnetic spectrum (light), what type of wave is heat?
infrared
7. From the electromagnetic spectrum (light), what color is hottest? violet
8. Heating an object does what to the volume of it? increases
9. What type of heat transfer is this? conduction
10. What is the name of the object below? Convection
box
11. What type of heat transfer is this?
convection
12. Draw an arrow to indicate the direction of
the smoke of the punk in the diagram.
13. A insulator is an object or material that does not allow heat to pass
through easily. An example would be rubber, wood, plastic, glass, air etc.
Identify the following as an example of conduction, convection or radiation:
Light bulb radiation
Aluminum transfer bar in calorimetry lab conduction
Spoon in hot soup conduction
Hot air off the top of a candle convection
Wind convection
Curling iron conduction
Calorimetry
A nutritionist wishes to know the energy value for a piece of food. She uses a
calorimeter in which she places 200.0g of water. The change in temperature in
the water after the food has been completely combusted is 15.0 °C. How much
heat energy was stored in the food? HINT: Look at how much heat energy was
gained by the water. 3000 cal = 3.0 x 10 3 cal
Spring Final Study Packet
Nuclear Chemistry
Consider this isotope symbol: 15N7
How many protons? 7 How many neutrons? 8
What is the mass number? 15 What is the atomic number? 7
2. From which part of the atom do radioactive emissions originate? nucleus
3. What effect does the emission of an alpha particle have on the mass number and the
atomic number of the original isotope? Mass drops by four, proton number by 2
4. What effect does the emission of a beta particle have on the mass number and the
atomic number of the original isotope? Mass number stays the same proton
number goes up one
5. How is a positron formed? Proton splits into a neutron and positron; positron is
emitted and neutron stays
6. What effect does the emission of positron have on the mass number and the atomic
number of the original isotope? _ Mass number stays the same and proton
number goes down one
7. What particle has a mass of 1 amu and has no charge? Neutron
8. What is the nuclear symbol of this particle?1 0 n
9. What particle has a mass of 1 amu and has a 1+ charge? Proton
10. What is the nuclear symbol of this particle? 1 1 p
11. All nuclei with an atomic number above 92 are radioactive
12. Define half-life. Amount of time it takes for half of the sample to decay
13. Define transmutation. Changing of one element into another
14. The number of protons in the nucleus of an atom must change for transmutation to
occur.
15. If a large nucleus is bombarded with neutrons and two smaller nuclei are formed, the
process is called fission.
16. If two nuclei combine to form a heavier nucleus, the process is called fusion
17. Show the reaction that occurs when the following isotopes emit an alpha particle.
238

Np
4He
93
+
234 Pa
2
91
18. Show the reaction that occurs when the following isotopes emit a beta particle.

13C
0
6
e
13
+
-1
N
7
19. Show the reaction that occurs when the following isotopes emit a positron.
222
87
Fr

222
86
Rn
+
0
+1
e
Spring Final Study Packet
Motion
1. A person walks 20 meters down a hallway, turns around and walks back 5
meters. What is the displacement? 15 m down thehall What is the
distance traveled? 25m
2. Use the space below to draw out the following pattern:
3.
a. 2.0 cm North from 0,0 (label this initial)
b. 1.0 cm East
c. 2.0 cm North
d. 3.0 cm East (label this final)
4. What is the total distance traveled? 6 cm
5. What is the displacement? 4.5 cm NE
6. Calculate the displacement using Pythagorean theorem 4.5 cm NE
7. According to the chart to the right, what is the
average speed of the object?
9m / 3s = 3 m/s
Time (s)
0
1
2
3
Distance (m)
0
3
6
9
8. Is this object accelerating?
No, it is traveling at a constant speed each second
9. While traveling along the highway a driver slows from 24m/s to 15 m/s in
12 seconds, what is the driver’s acceleration?
15 m/s – 24 m/s = - 0.75 m/s2
12 s
10. A bicycle rider travels 60.0 km in 3.5 hours. What is the cyclist’s average
speed?
60.0 km / 3.5 hours = 17 km/hr
11. How much time would it take for the sound of thunder to travel 1,500
meters if sound travels at the speed of 330m/s? 330 m/s = 1500 / x (4.5s)
Spring Final Study Packet
12. A snail can move approximately 0.30 meters per minute. How many
meters can the snail travel in 15 minutes?
0.30 m/min = x/15 min (4.5 m)
13. An ice cream truck is moving along at 20m/s. It then speeds up to 28 m/s
in 5 seconds. What is the acceleration of the truck?
28 m/s – 20 m/s = 1.6 m/s2 rounded to 2 m/s2 for sig figs
5s
14. If a rocket in space is traveling at a constant velocity of 9.8 m/s and then
uses its propulsion system to accelerate to 10. m/s during a 3.0 minute
burn, what is the acceleration of the rocket?
10.m/s – 9.8 m/s = 0.067 m/s/min
3.0 min
Write a description of the motion in the graphs below:
Constant velocity
Constant velocity
Moving backward at Constant velocity
Newton’s Laws
1. Mass never changes but weight is different with gravity differences.
2. What is the weight of a 2.0kg mass? F = ma; F = 2.0kg * 10. m/s2;
F = 20. N
3. What is the mass of a 20. N object on Earth? F = ma; 20.N = m * 10. m/s2
m = 2.0 kg
4. Friction always opposes motion.
5. What is the net force if an airplane has a thrust force of 600N and an air
friction of 200N? 600N – 200N = 400 N
6. If the net force is 20N and the sliding friction is 5N, with what force is a box
being pushed across the floor? 20N = F - 5N; F = 15N
7. If a car has a forward motion of 45N and the rolling friction is -45N, what is
the acceleration of the car? 0N; When the net force is zero the object has
constant velocity therefore, no acceleration.
Spring Final Study Packet
Newton’s 1st Law of Motion
8. The first law is also called the law of inertia.
9. This property is directly related to mass.
10. Rank the following by order of most inertia (1) to least inertia (5)
a. baseball
b. bowling ball c. feather
d. car
e. marble
3
2
5
1
4
Newton’s 2nd Law of Motion
11. Mass resists acceleration
12. Forces cause acceleration
13. Acceleration equals the ratio of force over mass
14. A heavier object accelerates slower (less) than a lighter object.
15. A net force of 25 is applied to an object and it accelerates 10. m/s2, what
is the mass of the object? F = ma; 25N = m * 10. m/s2; m = 2.5 kg
Newton’s 3rd Law of Motion
Identify the action reaction pairs below:
A ball hitting a wall.
A bug hitting a windshield.
Action: The ball hits the wall
Action: A bug hits a windshield
Reacton: The wall hits the ball
Reaction: The windshield hits the bug.
Identify which of Newton’s 3 laws applies
Pushing a cart down the hall, when you try to turn it, it tries to go straight.
Newton’s First Law
More acceleration takes more force
Newton’s Second Law
When you push your knuckles into a table, it hurts your knuckles.
Newton’s Third Law
A ball thrown into a wall bounces back.
Newton’s Third Law
Work, Power and Energy W = Fd
P = W / t KE = ½ mv2
PE = mgh
1. If a lawnmower is pushed 8.5 meters and 2550 Joules of work is performed, how
much force is needed to push the lawnmower?
a. 0.0033 N
c. 19 000 N
b. 300 N
d. 20 000 N
2. A student climbing the stairs covers 6.4 m. The student weighs 500 N. How
much work did the girl do in climbing the stairs?
a. 3000 J
c. 0.1 J
b. 70 J
d. 5 J
3. In 20.0 seconds, a large crate is pushed up a 9.0 meter plank. A force of 25
Newtons is required. How much power is used?
a. 11 W
c. 220 W
b. 9.0 W
d. 180 W
Spring Final Study Packet
4. A boy runs 100 meters in 7 seconds. He is 600 N. How much power does he
expend?
a. 60 000 W
c. 9000 W
b. 4000 W
d. 40 W
5. Calculate the kinetic energy of a roller coaster car with a mass of 20.0 kg going a
speed of 4.0 m/s.
a. 800 J
c. 160 J
b. 5.0 J
d. 40 J
6. If a ball is held from a height of 50 m that weighs 0.02 kg, how much PE does it
have?
a. 10 J
c. 90 J
b. 1 J
d. 2000 J
Fill in the Chart
a
c
d
b
e
e
b
d
c
a
Harmonic Motion and Waves
1.
What is the formula for calculating wave speed? S = f λ
(frequency x wavelength)
2. If the speed of a wave is 120 m/s and the wavelength is 60.0 m, what
would be the frequency of the wave? 2.0 Hz
3. Which wave type moves perpendicular to wave direction? transverse
4. Which wave type moves parallel to wave direction? Compressional
(longitudinal)
Label all of the following parts.
A - transverse
B – wavelength
C – Crest
D – trough
E - amplitude
AB – longitudinal
AC – wavelength
AD – compression
AE - rarefaction
Spring Final Study Packet
5. What type of matter is most efficient at transmitting sound waves?
Sound travels faster through solids (more dense materials)
6. Define natural frequency the frequency at which objects will vibrate when
disturbed
7. If the fundamental frequency is 20Hz, what is the frequency of the 5th
harmonic? 100Hz (harmonic x natural frequency)
8. What is the harmonic of the diagram to the right? 3
9. What would be an example of harmonic motion? Anything that repeats
Sound and Light
1. Sound is a compressional wave, which moves parallel to the medium it is
traveling through.
2. Sound travels best through dense material (solids)
3. What is the wavelength of a sound wave with a frequency of 100 Hz?
(speed of sound is 340 m/s) 3.5 m
4. If your echo takes 15 seconds to get back to you, how far away was the
object it bounced off of? S = d/s; 340 m/s = d/15 s; 5100m
5. True or False: The frequency of sound has no effect on how loud we hear
the sound. Frequency is pitch amplitude is volume
6. What must happen to the electron in order for an atom to emit light?
a. Move from a low energy level to a high energy level
b. Stay in a high energy level
c. Move from a high energy level to a low energy level
d. Stay in a low energy level
7. What are the three primary colors of light?
Red, Green, Blue (RGB)
8. What are the three primary colors of pigments? Cyan, magenta, yellow
(CMY)
9. What does a piece of blue cloth do to the colors in white light that fall
upon it
a. It absorbs blue light and reflects all the rest of the colors to our eyes
b. It absorbs all the colors except blue and reflects only blue light to
our eyes
c. It absorbs all of the colors in white light
d. It absorbs none of the colors in white light
10. Most of what we see is because of reflected light.
11.
List the types of electromagnetic waves from lowest energy to
highest energy: radio, microwave, infrared, visible, UV, x-ray, gamma