__homework assignments__

please answer questions on a separate sheet of paper

to be turned in at the beginning of class

(not in your notebook)

homework is due under the date listed

__9/11/15__

1. Define "mechanics" according to its role in physics.

2. Why is "motion" such an important topic in physics?

3. What is the unit used to measure force?

4. What is the difference between speed and velocity?

5. What factors are needed to calculate acceleration?

__9/18/15__

Show all your calculations!

1. In the course of their migration, monarch butterflies travel up to 50 miles per day. What is their speed in

__miles per hour__(mi/hr)?

2. If the monarch butterflies migrate from the United States to Mexico, what is their

__velocity__?

3. You're playing dodgeball and suddenly your superhero strength kicks in. You launch the ball 50 feet with little effort. How many

__meters__did you throw it?

4. It took the ball 2 seconds to travel that distance. What was the ball's speed in meters per second (m/s)?

5. The ball continued 2 more seconds at the same velocity. Did it accelerate? Explain your answer.

__9/25/15__

1. Why is Newton's First Law of Motion also called the Law of Inertia?

2. For an object to stay at rest, an unbalanced force upon it must be __________ than the force keeping the object at rest.

3. What is the velocity of an object at rest? What is the acceleration of an object at rest?

4. Using Newton's First Law, explain the importance of wearing a seatbelt in the car. Draw a diagram of a car crashing into a wall and include the trajectory of a person in the car who was not wearing a seatbelt.

5. What is the velocity of an object in motion? What is the acceleration of an object in motion?

__10/2/15__

1. How many laws of motion did Isaac Newton establish?

2. Newton's Second Law pertains to the behavior of objects for which all existing forces are __________ __________.

3. Write the formula to find

__force__according to Newton's Second Law of Motion. Identify the units for each factor in the formula.

4. What is the force required to move a 75kg older brother off your bed with an acceleration of 2 m/s2?

5. You just found out he ate your last chocolate chip cookie. What would his acceleration be if you exerted a 250N force upon him?

__10/9/15__

1. According to Newton, whenever objects A and B interact with each other, they __________ _________ on each other.

2. State Newton's Third Law of Motion.

3. Draw a diagram of the following:

A motorboat is propelling itself across a lake.

What are the objects in the action-reaction force pair?

Show the directions of the action-reaction forces.

4. What is the force on the boat if it has a mass of 1000kg and it accelerates at 10 m/s2?

5. According to Newton's Third Law, is there another force involved in the boat's movement? If so, what is its value? Explain your answer.

__10/16/15__

1. What is the purpose of friction?

2. Draw a diagram of the following:

You have to help your physics teacher move a really big box that she bought from the Big Box Store. If you have to slide the box across the parking lot, what is the direction that the box is supposed to travel? What is the direction of friction?

3. If it was raining, what would happen to the force of friction in #2?

4. Based on your observations in the lab activity, list the following surfaces from least to greatest coefficients of friction:

aluminum

sandpaper

wood

felt

5. Explain how it is possible for friction to occur in air.

__10/23/15__

1. Is gravity a force due to contact or a force that acts at a distance? Explain your answer.

2. According to Newton's Law of Universal Gravitation, which two factors are responsible for the force of attraction between objects?

3. Write the mathematical formula for Newton's Law of Universal Gravitation. Describe each factor involved in the formula.

4. If the earth's gravity is so strong, explain why the moon does not fall toward the earth. Which of Newton's laws of motion does this involve?

5. Are the

__force__of gravity and the

__acceleration__of gravity the same thing? Explain your answer.

*MIDTERM EXAM 10/30/15*

__10/30/15__

1. Define "energy". If no work is done, is there any energy involved?

2. What is the definition of "potential energy"? If the mass of an object increases, how does that affect the object's potential energy? If the height of the object decreases, how does that affect the object's potential energy?

3. What is the potential energy (PE) of a 200kg boulder on the edge of a cliff that is 100m high?

__Show your calculations__. (Do not take into account the distance from the center of the earth)

4. What is the definition of "kinetic energy"? How is an object's kinetic energy affected if its velocity increases?

5. What is the kinetic energy (KE) of your 2kg physics notebook if it is "accidentally" thrown at the cat at a velocity of 5 m/s?

__Show your calculations.__

__11/6/15__

No new homework questions

Review Show Me video and notes for class on 11/6/15

__11/13/15__

1. What factor must remain constant for "uniform circular motion"?

2. The distance of one complete cycle around the perimeter of a circle is called the ____________.

3. Draw a circle with a radius of 3cm. What is the circumference of the circle?

4. What is the speed of the ant if it took 3 seconds to go around the circle once (in cm/s)? If his speed remains the same, is his velocity changing? Explain.

5. If the ant suddenly lost the scent of the ant trail and continued along a

__tangent__path, what direction would he continue to travel? Draw his new path on the circle you drew in #3.

__11/20/15__

1. Waves show periodic ________ and ________ motion. Waves transmit __________ but do not move __________.

2. Draw a transverse wave and label the following: crest, trough, wavelength, amplitude.

3. If wavelength is the number of complete waves that pass through a given point per second, what happens to the

__frequency__if the wavelength gets shorter?

4. You are surfin' a major wave, dude, and the wavelength is 7.5m. If it takes you 2s to travel one wavelength, what is your speed? Show your calculations.

5. For the following diagram, if a straight wave starts along the left hand side and travels to the right, what happens to the wave as it exits from between the two boundaries? Show the wave movement from beginning to end.

I I

I I

I

I I

I I

__12/4/15__

1. Draw a complete longitudinal wave and label the following: compression, rarefaction, wavelength, direction of energy movement, direction of particle movement

2. Name two ways that a transverse wave and a longitudinal wave are the same. Name two ways that a transverse wave and a longitudinal wave are different.

3. Explain how a sound wave travels in air.

4. Choose from the following to fill in the blanks: gases/liquids/solids

In general, longitudinal sound waves travel faster through __________ than they do in _________ and __________.

5. You watch a scary movie at the North Pole where the temperature is 2deg Celsius. Your friend at the Equator watches the same movie where the temperature is 40deg Celsius. Whose scream travels faster in air? Show your calculations and explain your answer.

__12/11/15__

No new homework

__12/18/15__

1. What is the definition of a sound's "pitch"? What is the definition of "frequency" of sound?

2. a) Give an example of a sound that has a high pitch. Does that sound have a high or low frequency?

b) Give an example of a sound that has a low pitch. Does that sound have a high or low frequency?

3. Identify an instrument and describe how to change the pitch of the sound coming from that instrument.

4. What is the difference between an "ultrasonic" and an "infrasonic" sound? Give an example of an animal that utilizes each.

5. Draw two transverse waves on the same graph that show the following: high frequency/high pitch, low frequency/low pitch. Use different colors to show how the waves differ.

__1/8/16__

1. Be prepared to locate the following structures on an eye diagram:

cornea, pupil, ciliary muscle, iris, lens, sclera, retina, optic nerve, tapetum, blind spot, aqueous humor, vitreous humor

2. How does the ciliary body affect the pupil?

3. Which structure is responsible for focusing incoming light? Onto which other structure does it focus that light?

4. Which structure is found in nocturnal animals that is not found in humans? What is the purpose of that structure?

5. Which structure contains rod cells and cone cells? What are the functions of rod cells and cone cells?

cow_eye_dissection_answers.pdf | |

File Size: | 566 kb |

File Type: |

__1/15/16__

1. Give one example that proves that light behaves like waves. What type of waves are light waves?

2. Draw a diagram of the electromagnetic spectrum and label the following:

longer wavelength region/shorter wavelength region/higher frequency region/lower frequency region/radio waves/gamma waves/visible light spectrum

3. Why is it called the visible light spectrum? What colors are contained in the visible light spectru.m? Which color of the visible light spectrum has the longest wavelength? the shortest wavelength?

4. What is the problem when someone is nearsighted? farsighted? Draw diagrams to help explain you answer and name the eye structures involved.

5. How are "afterimages" formed?

__1/22/16__

Review Show Me video and notes for class on 1/22/16

__1. What is the definition of refraction? Why would a ray of light be refracted?__

1/29/16

1/29/16

2. Draw a diagram of a refracted ray of light. Label the following:

-medium(s) involved

-the normal

3. What does an "index of refraction" mean? List the following from

__lowest to highest__index of refraction:

vacuum / diamond / air / water / ice

4. Explain how a prism disperses white (visible) light. Other than color, how do the different parts of the dispersed light differ from one another?

5. Other than a prism, name two other items that can be used to disperse light.

__2/5/16__

1. What is the difference between a luminous object and an illuminated object? Give an example of each.

2. Explain the concept of "line of sight". What does it have to do with the direction that light travels to our eyes?

3. Draw a diagram showing the law of reflection. Label the following:

-incident angle

-reflected angle

-normal line

-angle of incidence

-angle of reflection

4. Explain how it would be possible see the back of a person's head if he/she was facing you. Draw a diagram and include any line(s) of sight.

5. Why is it more difficult to trace an image if you are looking at its reflection rather than the image itself? (Refer to lab in class.)

__2/12/16__

1. Identify four properties of matter.

2. What is the atomic theory of matter?

3. Draw an atom that has 8 electrons. Make sure the electrons are located in the proper places.

4. How many protons and neutrons does the atom above have? Draw them in the diagram. What is the element you just drew?

5. What are the four names of the location of electrons? If an electron moves to a higher state, does that require an addition or release of energy? If an electron moves to a lower state, does that require an addition or release of energy?

__2/19/16__

1. What is the Kinetic Theory of Matter?

2. List the phases of matter from

__least to greatest__amounts of energy.

3. Which would you expect to swim faster: a fish in the Arctic Ocean or a fish in tropical waters? Explain your answer.

4. Explain how the "calorie" used to measure heat is the same "calorie" measurement in food.

5. Describe two ways that heat can be produced.

__Give an example of each.__

__2/26/16__

1. Draw your mom's mug of hot coffee on the counter.

If the coffee is initially 120 degrees Fahrenheit (F), what will eventually happen to the temperature of the coffee?

Draw the direction of heat transfer.

2. What does this change in temperature indicate about the kinetic energy of the coffee?

3. Draw yourself a cold soda on the table on a hot, summer day.

If the soda is initially 35 degrees F, what will eventually happen to the temperature of the soda if the air surrounding it is warmer?

Draw the direction of heat transfer.

4. According to the lesson, what is the definition of heat and what can be expected regarding the direction heat transfer?

5. Define thermal equilibrium. How can a room-temperature soda in a tub filled with ice water be an example? Be thorough in your explanation.

__3/4/16__

1. What is vibrational kinetic energy? How does it describe the movement of particles?

2. Define "conduction". What are the two conditions in order for conduction to occur?

3. Conduction will continue until the temperatures of the objects are __________. What is this point called?

4. Draw a diagram showing conduction from hot water in a cup to the tip of the spoon in the cup. Be sure to include particle movement.

5. If your finger is the same temperature as the spoon, will conduction occur if you touch the spoon? Explain your answer.

__3/11/16__

1. What is the difference between conduction and convection?

2. What happens to the particles in a fluid as they are heated? How does this affect the density of the fluid?

3. How are circulation currents formed? Draw a diagram showing fluid movement in a circulation current.

4. What is the difference between natural and forced convection? Give an example of each.

5. If the atmospheric air was warm and the weather report showed that a cold front of air was coming in but would stay along the earth's surface, would you expect the warm air and cold air to reach thermal equilibrium? Explain your answer.

*MIDTERM REVIEW AND EXAM 3/18/16

__3/18/16__

1. How is radiation different from conduction and convection? Of these three types of heat transfer, which can occur in the void of space?

2. Draw a diagram of the electromagnetic spectrum. Name and indicate where the following can be found:

-the type of waves received from the sun

-the type of waves used to heat up food quickly

-the type of waves emitted by objects at room temperature

3. As the temperature of an object increases, how are the radiated wavelengths affected?

4.

__Explain__how some objects emit radiation within the visible spectrum.

5. Name two ways to detect radiated heat OTHER than with your own senses.

__4/1/16__

No class on 3/25/16.

No new homework.

HAPPY EASTER! HE IS RISEN!

__4/8/16__

1. What is the definition of "enthalpy"? How is this different from "temperature"?

2. a) Write the mathematical formula for enthalpy and define what each letter in the formula represents.

b) If a chemical reaction gives off heat, will the value of H be (+) or (-)?

3. What is the definition of "entropy"? Does entropy require energy in the system?

4. a) Write the mathematical formula for entropy and define what each letter in the formula represents.

b) Name two ways in which the entropy of a system can be increased.

5. Is spontaneous energy the same as random energy? Explain your answer. Is "free energy" spontaneous, random, or both?

6. Write the mathematical formula for free energy and define what each letter in the formula represents.

__4/15/16__

1. What is the definition of "magnetism"? Why are a magnet's "poles" important?

2. Draw a bar magnet and label the poles. Now draw additional bar magnets and draw lines of force to exhibit:

a) attraction

b) repulsion

3. Name two factors which could increase the force of a magnet.

4. Draw a single bar magnet and indicate the magnetic field created by that magnet.

a) Be sure to include lines of force.

b) Does an object need to be touching a magnet in order to feel its force? Explain your answer.

5. Name two ways in which nonmagnetic materials can be magnetized. Give an example of each process.

__4/22/16__

1. What is electricity?

2. How can objects produce electricity?

3. Explain why socks end up stuck together after being in the dryer. Draw a diagram to show electron movement. Is this an example of attraction or repulsion?

4. Explain why your hair stands up when rubbed with a balloon. Draw a diagram of electron movement. Is this an example of attraction or repulsion?

5. Why is lightning an example of "frictional charging"?

__4/29/16__

1. Is electric charge a contact or non-contact force? Give an example and explain your answer.

2. Explain why the direction of the electric field around a positive charge is directed away from the positive charge.

3. Explain why the direction of the electric field around a negative charge is directed toward the negative charge.

4. For the following diagram:

A (+) ----------> B (-)

Does particle A have high or low potential energy? Explain your answer.

5. For the following diagram:

A (+) -----------> B (+)

Does particle A have high or low potential energy? Explain your answer.

__5/6/16__

1. Draw a diagram of two metal plates (one positively charged, the other negatively charged) parallel to one another. Now draw a wire connecting them from the centers of the plates.

a) In which direction would a positive (+) test charge flow?

b) Would there be a difference in potential? If so, label the potential of each plate (low and/or high).

2. What are the two requirements in order for a circuit to work properly?

3. Draw a simple circuit like the one you constructed in class. What is the purpose of the battery in the circuit?

4. What does voltage measure? What is the unit of voltage?

5. What does current measure? What is the unit of current?

6. What is the unit for electrical power? What is the mathematical formula to calculate electrical power?

__5/13/16__

1. Draw a series circuit and label the following:

resistors (light bulbs) / battery / direction of electron flow

2. For a series circuit, what happens to the current when the number of resistors is increased?

3. If a series circuit contains multiple bulbs and ONE of the bulbs goes out or is disconnected, what happens the the other bulbs? Explain your answer.

4. Draw a parallel circuit and label the following:

resistors (lightbulbs) / battery / direction of electron flow

5. For a parallel circuit, what happens to the current when the number of resistors is increased? What happens to the total resistance when the number of resistors is increased?

6. If a parallel circuit contains multiple bulbs and ONE of the bulbs goes out or is disconnected, what happens to the other bulbs? Explain your answer.

__5/27/16__

1. What is the definition of a conductor?

2. Why are metals such good conductors? Explain your answer and give an example.

3. Explain why salt water is a good conductor.

4. What is the definition of an insulator?

5. Give examples of conductors and insulators from the parts of the simple circuits you have constructed.

*FINAL EXAM 5/27/16 covers all topics since the midterm from 4/1-5/13/16*