2024 Concept development practice page 27 1

Concept-Development 7-1 Practice Page Force and Velocity Vectors 1. Draw sample vectors to represent the force of gravity on the ball in the positions shown above (after it leaves the thrower’s hand). Neglect air drag. 2. Draw sample bold vectors to represent the velocity of the ball in the positions shown above. With lighter vectors, show the. Gitprocessor

Concept-Development. Practice Page. Polarization. The amplitude of a light wave has magnitude and direction and can. The Twelfth Edition will delight you with informative and fun Hewitt-Drew-It screencasts, updated content, applications, and new learning activities in MasteringPhysics. Learn anything, anytime.Concept-Development 35-2 Practice Page Compound Circuits 1. The initial circuit, below left, is a compound circuit made of a combination of resistors. It is As this concept development practice page 5 1 answers physics pdf, it ends up subconscious one of the favored ebook concept development practice page 5 1 answers physics pdf collections that we have. This is why you remain in the best website to see the unbelievable book to have. El-Hi Textbooks & Serials in Print, 2005 2005To fill out a concept development practice page, follow these steps: 1. Start by reading the instructions or prompts provided on the practice page. Understand the specific concept or theory that you need to develop. 2. Write down the main idea or concept at the top of the page. This will serve as your central focus.TR = Teaching Resources (CDP = Concept-Development Practice Book; PSE = Problem-Solving Exercises in Physics; NTQ = Next-Time Questions); TECH = Technology (PLM = Probeware Lab Manual; OT = Overhead Transparencies; IPS = Interactive Physics Simulations; VD = The Best From Conceptual Physics Alive! Videodiscs; VT = Conceptual Physics Alive!Authored by Paul Hewitt, the pioneer of the enormously successful "concepts before computation" approach, Conceptual Physics boosts student success by first building a solid conceptual understanding of physics. The Three Step Learning Approach makes physics accessible to today's students. Exploration - Ignite interest with meaningful examples ... Nov 21, 2015 · Concept-Development Practice Page 27-2 Polarization The amplitude of a light wave has magnitude and direction and can be represented by a vector. Polarized light vibrates in a single direction and is represented by a single vector. To the left, the single vector Concept-Development Practice Page 2-1 Non-Accelerated Motion 1: The sketch shows a ball rolling at a constant velocity along a level floor. The ball rolls from the first position show to the second in 1 second. The two positions are 1 meter apart. Sketch the ball at successive 1-second intervals all the way to the wall (neglect resistance) a.Document related concepts. Name Class Date Concept-Development Practice Page 6-1 Friction 1. A crate ﬁlled with delicious junk food rests on a horizontal ﬂoor. Only gravity and the support force of the ﬂoor act on it, as shown by the vectors for weight W and normal force n. a. The net force on the crate is (zero) (greater than zero). b. Concept Development Practice Page 23 1 Answers Author: blogs.sites.post-gazette.com-2023-08-19T00:00:00+00:01 Subject: Concept Development Practice Page 23 1 Answers Keywords: concept, development, practice, page, 23, 1, answers Created Date: 8/19/2023 3:45:48 AM Hostname: tp-lb-vip-c.timpani.co.uk; Country: United Kingdom NetName: UK-POSITIVE-2013052911; Address: 24 Ganton Street, W1F 7QY, London, UNITED KINGDOM, The Positive ...it. The concept that is fundamental is (mass) (weight). The concept that additionally depends on location in a gravitational ﬁ eld is (mass) (weight). (Mass) (Weight) is a measure of the amount of matter in an object and only depends on the number and kind of atoms that compose it.Concept-Development Practice Page . 40-1 ~ Nuclear Fission and Fusion ~ l. Complete the table for a chain EVENT . 2 . 3 . reaction in which two neutrons 4 ... 1. If n were somehow replaced with n x and n y, the car (would) (would not) behave identically to being supported by n. 2. Since the car doesn’t accelerate vertically, component n y must be (greater than) (equal and opposite to) (less than) mg. 3. The velocity of the car at any instant is (along the radius of) (tangent to) its circular path. 4.TR = Teaching Resources (CDP = Concept-Development Practice Book; PSE = Problem-Solving Exercises in Physics; NTQ = Next-Time Questions); TECH = Technology (PLM = Probeware Lab Manual; OT = Overhead Transparencies; IPS = Interactive Physics Simulations; VD = The Best From Conceptual Physics Alive! Videodiscs; VT = Conceptual Physics Alive!32 answers. Oct 23, 2018. New ideas, new concepts in science and art arise as a result of human creativity, innovation, emotional intelligence, the need for self-realization, the need to be ...Hostname: tp-lb-vip-c.timpani.co.uk; Country: United Kingdom NetName: UK-POSITIVE-2013052911; Address: 24 Ganton Street, W1F 7QY, London, UNITED KINGDOM, The Positive ... a. Compared to the acceleration of the system in 2, previous page, the acceleration of (A + B) here is (less) (more) and is (close to zero) (close to g). b. In this case the acceleration of B is (practically that of free fall) (constrained). 4. Suppose A is a feather or coin, and B has a mass of 1 kg. a. The acceleration of (A + B) here is1. Above left: Use the scale 1 cm:5 m and draw the positions of the dropped ball at 1-second intervals. Neglect air drag and assume g = 10 m/s2. Estimate the number of seconds the ball is in the air. seconds 2. Above right: The four positions of the thrown ball with no gravity are at 1-second intervals. At Concept-Development 6-3 Practice Page Racing Day with a = F/m In each situation below, Cart A has a mass of 1 kg. Circle the correct answers (A, B, or Same for both). 1. Cart A is pulled with a force of 1 N. Cart B also has a mass of 1 kg and is pulled with a force of 2 N. Which undergoes the greater acceleration? (A) (B) (Same for both) 2.4. [PDF] Concept-Development Practice Page. Author: www.chino.k12.ca.us. Publish: 5 days ago. Rating: 5 (1424 Rating) Highest rating: 4. Lowest rating: 2. Descriptions: In each case, a rock is acted on by one or more forces. Draw an accurate vector diagram showing all forces acting on the rock, and no other forces.Visible g. How is the speed of light in glass affected by the succession of time delays that accompany the absorption and re-emission of light from atom to atom in the glass? The average speed of light is less in glass than in air. h. How does the speed of light compare in water, glass, and diamond?The workbook bridges the gap between textbook and homework problems by providing students the opportunity to learn and practice skills prior to using those skills in quantitative end-of-chapter problems, much as a musician practices technique separately from performance pieces.1. A sine curve that represents a transverse wave is drawn below. With a ruler, measure the wavelength and amplitude of the wave. a. Wavelength = b. Amplitude = 2. A kid on a playground swing makes a complete to-and-fro swing each 2 seconds. The frequency of swing is (0.5 hertz) (1 hertz) (2 hertz) and the period isAmazon.com: Conceptual Physics Concept-Development Practice Book: 9780130542595: PRENTICE HALL: Books ... 4.0 out of 5 stars 27 ratings. See all formats and editions.This is "Concept Development 2-1 & 2-2 Answer key" by Kristin Abbott on Vimeo, the home for high quality videos and the people who love them.concept-development-practice-page-33-2-answers 1/3 Downloaded from coe.fsu.edu on August 12, 2023 by guest Kindle File Format Concept Development Practice Page 33 2 Answers Yeah, reviewing a books concept development practice page 33 2 answers could ensue your close associates listings. This is just one of the solutions for you to be successful. Practice Page 21 1 Concept Development Practice Page 21 1 Controversies in Political Theology addresses the question of whether Christians should be struggling towards development or liberation. It explores the theologies of development and liberation, from their beginnings in the 1960s through their changes to the central arguments today. The ... 1. In the sketch below, non-polarized light from a ﬂ ashlight strikes a pair of polarizing ﬁ lters. a. Light is transmitted by a pair of polarizing ﬁ lters when their axes are (aligned) (crossed at right angles) and light is blocked when their axes are (aligned) (crossed at right angles). b. Transmitted light is polarized in a direction Authored by Paul Hewitt, the pioneer of the enormously successful "concepts before computation" approach, Conceptual Physics boosts student success by first building a solid conceptual understanding of physics. The Three Step Learning Approach makes physics accessible to today's students. Exploration - Ignite interest with meaningful examples ...Concept-Development Practice Page 26-1. Sound: 1) Two major classes of waves are longitudinal and transverse. Sound waves are: Answer: Longitudinal. 2) The frequency of a sound signal refers to how frequently the vibrations occur. A high-frequency sound is heard at a high: Answer: Pitch. 3) The sketch questions answer would be: 2.5.Practice Page 21 1 Concept Development Practice Page 21 1 Controversies in Political Theology addresses the question of whether Christians should be struggling towards development or liberation. It explores the theologies of development and liberation, from their beginnings in the 1960s through their changes to the central arguments today. The ...1. Complete the following statements. a. A lone neutron spontaneously decays into a proton plus an . b. Alpha and beta rays are made of streams of particles, whereas gamma rays are streams of . c. An electrically charged atom is called an . d. Different of an element are chemically identical but differ in the number of neutrons in the nucleus. e.Concept-Development 10-1 Practice Page n zd Circular Motion eler Ne on's sec d law, a = F/m, tells us that net force and its corresponding acceleration are always in Irection, (Both force and acceleration are vector quantities.) But force and acceleration are the sa not always in the direction of velocity (another vector). l.1. Paint spray travels radially away from the nozzle of the can in straight lines. Like gravity, the strength (intensity) of the spray obeys an inverse-square law. Complete the diagram by ﬁ lling in the blank spaces. 2. A small light source located 1 m in front of an opening of area 1 m2 illuminates a wall behind. If theConcept-Development 11-3 Practice Page Torques 1. Apply what you know about torques by making a mobile. Shown below are ﬁ ve horizontal arms with ﬁ xed 1- and 2-kg masses attached, and four hangers with ends that ﬁ t in the loops of the arms, lettered A through R. You are to ﬁ gure where the loops should be attached so that when the Concept-Development Practice Page 2-1 Non-Accelerated Motion 1: The sketch shows a ball rolling at a constant velocity along a level floor. The ball rolls from the first position show to the second in 1 second. The two positions are 1 meter apart. Sketch the ball at successive 1-second intervals all the way to the wall (neglect resistance) a. Concept-Development 11-3 Practice Page Torques 1. Apply what you know about torques by making a mobile. Shown below are ﬁ ve horizontal arms with ﬁ xed 1- and 2-kg masses attached, and four hangers with ends that ﬁ t in the loops of the arms, lettered A through R. You are to ﬁ gure where the loops should be attached so that when the1. How much work (energy) is needed to lift an object that weighs 200 N to a height of 4 m? 800 J 2. How much power is needed to lift the 200-N object to a height of 4 m in 4 s? 200 W 3. What is the power output of an engine that does 60,000 J of work in 10 s? 6 kW 4. The block of ice weighs 500 newtons. a. concept-development-practice-page-33-2-answers 1/3 Downloaded from coe.fsu.edu on August 12, 2023 by guest Kindle File Format Concept Development Practice Page 33 2 Answers Yeah, reviewing a books concept development practice page 33 2 answers could ensue your close associates listings. This is just one of the solutions for you to be successful.Dec 11, 2012 · Concept-Development 6-1 Practice Page. 10 m/s2 6 m/s2 0 m/s2 –2 m/s2 –10 m/s2 0 m/s2 Note that we take acceleration down as + here. If chosen as –, To fill out a concept development practice page, follow these steps: 1. Start by reading the instructions or prompts provided on the practice page. Understand the specific concept or theory that you need to develop. 2. Write down the main idea or concept at the top of the page. This will serve as your central focus.Document related concepts. Name Class Date Concept-Development Practice Page 6-1 Friction 1. A crate ﬁlled with delicious junk food rests on a horizontal ﬂoor. Only gravity and the support force of the ﬂoor act on it, as shown by the vectors for weight W and normal force n. a. The net force on the crate is (zero) (greater than zero). b. Drop and Pull1. Consider a 1-kg cart being pulled by a 10-N applied force. According to Newton’s second law,acceleration of the cart isa = F = 10 N = 10 m/s 2 .m 1 kg2. Consider the acceleration of the cart when the applied forceis due to a 10-N iron weight attached to a string draped overa pulley.preexisting concept. While observation process can require only a few participants, the result may not be representative. Class Objectives 1.Basic theory for product design and development a.Design methodology concept generation/creativity, concept selectionCreated Date: 5/4/2016 3:49:47 PM The workbook bridges the gap between textbook and homework problems by providing students the opportunity to learn and practice skills prior to using those skills in quantitative end-of-chapter problems, much as a musician practices technique separately from performance pieces.800 J 200 W 6 kW 2:1 250 N Block on A reaches bottom ﬁ rst; greater acceleration and less ramp distance. Although it will have the same speed at bottom, the time it takes to reach that speed is different! 1. A pair of toy cart wheels that can spin independently are rolled obliquely from a smooth surface onto two plots of grass — a rectangular plot as shown at the left, and a triangular plot as shown at the right. The ground is on a slight incline so that after slowing down in the grass, the wheels speed up again when emerging on the smooth ...How much does a 1-kg bag of nails weigh on Earth? W = mg = (1 kg)(10 m/s 2) = 10 m/s = 10 N, or simply, W = mg = (1 kg)(10 N/kg) = 10 N. Answer the following questions. Felicia the ballet dancer has a mass of 45.0 kg. 1. What is Felicia’s weight in newtons at Earth’s surface? 2. Given that 1 kilogram of mass corresponds to 2.2 pounds at How much does a 1-kg bag of nails weigh on Earth? W = mg = (1 kg)(10 m/s 2) = 10 m/s = 10 N, or simply, W = mg = (1 kg)(10 N/kg) = 10 N. Answer the following questions. Felicia the ballet dancer has a mass of 45.0 kg. 1. What is Felicia’s weight in newtons at Earth’s surface? 2. Given that 1 kilogram of mass corresponds to 2.2 pounds at a. Compared to the acceleration of the system in 2, previous page, the acceleration of (A + B) here is (less) (more) and is (close to zero) (close to g). b. In this case the acceleration of B is (practically that of free fall) (constrained). 4. Suppose A is a feather or coin, and B has a mass of 1 kg. a. The acceleration of (A + B) here isThe workbook bridges the gap between textbook and homework problems by providing students the opportunity to learn and practice skills prior to using those skills in quantitative end-of-chapter problems, much as a musician practices technique separately from performance pieces. 5.0. (33) $8.00. Zip. Internet Activities. ★★★★Self Concept and Personality Development Unit! This 4-week unit includes all the resources needed for relevant and deep student learning, all with step by step teacher instructions. This is a great unit for students to reflection and acquire the skills and knowledge needed to be healthy ...My EPortfolio - Home Concept-Development Practice Page . 40-1 ~ Nuclear Fission and Fusion ~ l. Complete the table for a chain EVENT . 2 . 3 . reaction in which two neutrons 4 ... Concept-Development 6-1 Practice Page. 10 m/s2 6 m/s2 0 m/s2 –2 m/s2 –10 m/s2 0 m/s2 Note that we take acceleration down as + here. If chosen as –,ME igh sane Name lass Date Concept-Development Practice Page Satellite Motion 1. Figure’A shows “Newton's Mountain,” so high that its top is above the drag of the atmosphere, The cannonball is fired and hits the ground as shown, Draw the path the cannonball might take if it were fired a litte bit faster.Concept-Development 10-1 Practice Page n zd Circular Motion eler Ne on's sec d law, a = F/m, tells us that net force and its corresponding acceleration are always in Irection, (Both force and acceleration are vector quantities.) But force and acceleration are the sa not always in the direction of velocity (another vector). l. Concept-Development Practice Page. Light. 27-1. 1. The Danish astronomer Olaus Roemer made careful measurements of the period of a moon about the planet Jupiter. How this data enabled a calculation of the speed of light is described in your textbook on pages 534 and 535. a.1. A sine curve that represents a transverse wave is drawn below. With a ruler, measure the wavelength and amplitude of the wave. a. Wavelength = b. Amplitude = 2. A kid on a playground swing makes a complete to-and-fro swing each 2 seconds. The frequency of swing is (0.5 hertz) (1 hertz) (2 hertz) and the period is 1. In the circuit shown below, there is a voltage drop of 6 V across each 2-Ω resistor. a. By Ohm’s law, the current in each resistor is A. b. The current through the battery is the sum of the currents in the resistors, A. c. Fill in the current in the eight blank spaces in the view of the same circuit shown again at the right. 2.Concept-Development 6-1 Practice Page. 10 m/s2 6 m/s2 0 m/s2 –2 m/s2 –10 m/s2 0 m/s2 Note that we take acceleration down as + here. If chosen as –,If straight-line connections intersect the mirror, as at point C, then each seesthe other. The mouse, for example, cannot see or be seen by Abe and Bev.Here we have eight students in front ofa small plane mirror. Their positionsare shown in the diagram below. Makeappropriate straight-line constructions toanswer the following:© Pearson ...Hostname: tp-lb-vip-c.timpani.co.uk; Country: United Kingdom NetName: UK-POSITIVE-2013052911; Address: 24 Ganton Street, W1F 7QY, London, UNITED KINGDOM, The Positive ... Practice Page 21 1 Concept Development Practice Page 21 1 Controversies in Political Theology addresses the question of whether Christians should be struggling towards development or liberation. It explores the theologies of development and liberation, from their beginnings in the 1960s through their changes to the central arguments today. The ... Nov 21, 2015 · Concept-Development Practice Page 27-2 Polarization The amplitude of a light wave has magnitude and direction and can be represented by a vector. Polarized light vibrates in a single direction and is represented by a single vector. To the left, the single vector 1. Paint spray travels radially away from the nozzle of the can in straight lines. Like gravity, the strength (intensity) of the spray obeys an inverse-square law. Complete the diagram by ﬁ lling in the blank spaces. 2. A small light source located 1 m in front of an opening of area 1 m2 illuminates a wall behind. If the1. In the circuit shown below, there is a voltage drop of 6 V across each 2-Ω resistor. a. By Ohm’s law, the current in each resistor is A. b. The current through the battery is the sum of the currents in the resistors, A. c. Fill in the current in the eight blank spaces in the view of the same circuit shown again at the right. 2.tion of the ball is shown at 1-second intervals. Air resistance is negligible, and g = 10 m/s2. Fill in the boxes, writing in the values of velocity components ascending, and your calculated resultant velocities descending.Concept-Development Practice Page . 40-1 ~ Nuclear Fission and Fusion ~ l. Complete the table for a chain EVENT . 2 . 3 . reaction in which two neutrons 4 ... Concept-Development 7-1 Practice Page Force and Velocity Vectors 1. Draw sample vectors to represent the force of gravity on the ball in the positions shown above (after it leaves the thrower’s hand). Neglect air drag. 2. Draw sample bold vectors to represent the velocity of the ball in the positions shown above. With lighter vectors, show theME igh sane Name lass Date Concept-Development Practice Page Satellite Motion 1. Figure’A shows “Newton's Mountain,” so high that its top is above the drag of the atmosphere, The cannonball is fired and hits the ground as shown, Draw the path the cannonball might take if it were fired a litte bit faster. Mar 4, 2013 · 1. A pair of toy cart wheels that can spin independently are rolled obliquely from a smooth surface onto two plots of grass — a rectangular plot as shown at the left, and a triangular plot as shown at the right. The ground is on a slight incline so that after slowing down in the grass, the wheels speed up again when emerging on the smooth ... 1. Paint spray travels radially away from the nozzle of the can in straight lines. Like gravity, the strength (intensity) of the spray obeys an inverse-square law. Complete the diagram by ﬁ lling in the blank spaces. 2. A small light source located 1 m in front of an opening of area 1 m2 illuminates a wall behind. If theMy EPortfolio - Home Concept-Development 26-1 Practice Page Sound 1. Two major classes of waves are longitudinal and transverse. Sound waves are (longitudinal) (transverse). 2. The frequency of a sound signal refers to how frequently the vibrations occur. A high-frequency sound is heard at a high (pitch) (wavelength) (speed). 3.Dec 7, 2015 · Drop and Pull1. Consider a 1-kg cart being pulled by a 10-N applied force. According to Newton’s second law,acceleration of the cart isa = F = 10 N = 10 m/s 2 .m 1 kg2. Consider the acceleration of the cart when the applied forceis due to a 10-N iron weight attached to a string draped overa pulley. Will the cart accelerate as before, at 10 m ... 1. In the circuit shown below, there is a voltage drop of 6 V across each 2-Ω resistor. a. By Ohm’s law, the current in each resistor is A. b. The current through the battery is the sum of the currents in the resistors, A. c. Fill in the current in the eight blank spaces in the view of the same circuit shown again at the right. 2. seconds. But surprisingly, the hang time of the greatest jumpers is most always less than 1 second! A longer time is one of many illusions we have about nature. To better understand this, ﬁ nd the answers to the following questions: 1. If you step off a table and it takes one-half second to reach the ﬂ oor, what will be theConcept-Development 35-2 Practice Page Compound Circuits 1. The initial circuit, below left, is a compound circuit made of a combination of resistors. It is

Concept-Development Practice Page. 28 Chapter 6 Newton’s Second but B is a low-mass feather (or a coin). a. Compared to the acceleration of the system in 2, previous page, the acceleration of (A + B) here is (less) (more) and. Jun 18, · On this page you can read or download concept development practice page 28 1 color 1 answers in PDF format.. Paletero cart

Document related concepts. Name Class Date Concept-Development Practice Page 6-1 Friction 1. A crate ﬁlled with delicious junk food rests on a horizontal ﬂoor. Only gravity and the support force of the ﬂoor act on it, as shown by the vectors for weight W and normal force n. a. The net force on the crate is (zero) (greater than zero). b. Concept-Development 10-1 Practice Page n zd Circular Motion eler Ne on's sec d law, a = F/m, tells us that net force and its corresponding acceleration are always in Irection, (Both force and acceleration are vector quantities.) But force and acceleration are the sa not always in the direction of velocity (another vector). l. physics-concept-development-practice-page-8-1-answers 1/2 Downloaded from www.epls.fsu.edu on August 26, 2023 by guest Kindle File Format Physics Concept Development Practice Page 8 1 Answers Yeah, reviewing a book physics concept development practice page 8 1 answers could accumulate your near associates listings. This is just one of the solutionsConcept Development Practice Page 27 1 Answers Conceptual Physics (12th Edition) Textbook Solutions bartleby The amount of light that gets through Filter B, compared to the amount that gets through Filter A is more less the same. Concept-Development 6-4 Practice Page 1. The weight of the block is represented by vector W. We show axes parallel and perpendicular to the surface of the inclined plane. 2. W has a component parallel to the surface (bold vector). Acceleration down the incline is due to this component. 3. W also has a component perpendicular to the surface ... 800 J 200 W 6 kW 2:1 250 N Block on A reaches bottom ﬁ rst; greater acceleration and less ramp distance. Although it will have the same speed at bottom, the time it takes to reach that speed is different!Concept Development Practice Page 23 1 Answers Author: blogs.sites.post-gazette.com-2023-08-19T00:00:00+00:01 Subject: Concept Development Practice Page 23 1 Answers Keywords: concept, development, practice, page, 23, 1, answers Created Date: 8/19/2023 3:45:48 AMConcept-Development 29-4 Practice Page Refraction 1. The sketch to the right shows a light ray moving from air into water at 45° to the normal. Which of the three rays indicated with capital letters is most likely the light ray that continues inside the water? 2. The sketch on the left shows a light ray moving from glass into air at 30° to ...Aug 1, 2001 · Amazon.com: Conceptual Physics Concept-Development Practice Book: 9780130542595: PRENTICE HALL: Books ... 4.0 out of 5 stars 27 ratings. See all formats and editions. My EPortfolio - Home1. In the sketch below, non-polarized light from a ﬂ ashlight strikes a pair of polarizing ﬁ lters. a. Light is transmitted by a pair of polarizing ﬁ lters when their axes are (aligned) (crossed at right angles) and light is blocked when their axes are (aligned) (crossed at right angles). b. Transmitted light is polarized in a direction1. Paint spray travels radially away from the nozzle of the can in straight lines. Like gravity, the strength (intensity) of the spray obeys an inverse-square law. Complete the diagram by ﬁ lling in the blank spaces. 2. A small light source located 1 m in front of an opening of area 1 m2 illuminates a wall behind. If the Created Date: 5/4/2016 3:49:47 PMConcept-Development 10-1 Practice Page n zd Circular Motion eler Ne on's sec d law, a = F/m, tells us that net force and its corresponding acceleration are always in Irection, (Both force and acceleration are vector quantities.) But force and acceleration are the sa not always in the direction of velocity (another vector). l. 1. A sine curve that represents a transverse wave is drawn below. With a ruler, measure the wavelength and amplitude of the wave. a. Wavelength = b. Amplitude = 2. A kid on a playground swing makes a complete to-and-fro swing each 2 seconds. The frequency of swing is (0.5 hertz) (1 hertz) (2 hertz) and the period is.

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