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1. Electric field is [ ] a scalar. [ ]

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Question 1. Electric field is [ ] a scalar. [ ] a vector. [ ] it depends on the nature of the charges generating the field. 2. Potential is [ ] a scalar. [ ] a vector. [ ] it depends on the nature of the charges generating the field. 3. Check all statements that are correct. [  ] Electric field lines are always parallel to equipotentials. [ ] The angle between field lines and equipotentials depends on the nature of the charges generating the field. [ ] Electric field lines are always perpendicular to equipotentials. [ ] For any two points on the same E-field line, electric field line always points from a lower potential toward a higher potential. [ ] For any two points on the same E-field line, electric field line always points from a higher potential toward a lower potential. [ ] Electric field lines can cross each other.[ ] Electric field lines never cross each other. The picture shows a region with a uniform electric field in it (field lines are not shown). The two thick lines represent two equipotentials. 4. Sketch electric field vectors at points A, B, and C. 5. Write an equation which you should use to calculate the magnitude of the electric field, |E|, at point B. 6. Name only one (!) additional variable (shown in the picture) which value you need to know in order to calculate |E|. 7. Use a specific measuring device (you can find it on your table), measure the value for the variable named in question 6 and using that value calculate the magnitude of the electric field, |E|, at point B in the region shown in the picture on page 1. The picture shows a region with a uniform electric field in it (field lines are shown). Note: if you draw a line which passes through point A and is perpendicular to the field lines, it also passes through point B. 8. Draw an equipotential line through point A; draw an equipotential line through point C. 9. In the picture on the right, the distance between points B and C is equal to the distance between points A and C and equal to 5 m; the distance between points A and B is equal to 6 m; the potential at point C is equal to -200 V; the mag- nitude of the electric field in the region is 100 V/m. Use the data to find potential, VA, at point A. Also find, VB, at point B. VA = VB = 10. What is the change in the potential when moving from point A to point C?___________________ 11. When moving from point A to point C potential _____________(state if it drops or rises) What is the potential drop/rise when moving from point A to point C? _________________ 12. What is the potential difference between points A and C? The picture below shows a field line and three points on it. Potentials at the points are V1 = -3 V, V2 = 0 V, V3 = 3 V. Assume that in the region between points P1 and P3 electric field is uniform. 13. In which direction does electric field point at point P2? Explain the reason for your answer. 14. If you start at point P2 and move in the direction of the electric field, what is the change in the potential when you reach the next point shown in the picture? 15. If you start at point P2 and move in the direction of the electric field, what is the potential drop/rise when you reach the next point shown in the picture? 16. Check below all statements that are correct. [  ] Equipotentials are always parallel to electric field lines. [  ] Equipotentials are always perpendicular to electric field lines. [  ] Electric field vector always points in the direction of the fastest increase in the potential. [  ] Electric field vector always points in the direction of the slowest increase in the potential. [  ] Electric field vector always points in the direction of the fastest decrease in the potential. [  ] Electric field vector always points in the direction of the slowest decrease in the potential. What kind of a line (E-field or equipotential) runs along, or “hugs”, the boundary of a conductor (an electrode)? What kind of a line comes out a conductor and perpendicular to it? Let’s say the potential difference measured by the probe has the magnitude of 4.5 V. What is the magnitude of the average electric field between the tips of the double probe? Show your work.  Connect the double probe to a multimeter. Turn on the power supply and set it to about 30 V. Chose one point close to an electrode with a higher potential (about 1.5 cm from the electrode) and mark it with a pencil. Place the grounded tip of the probe at the marked point (we call it a resting tip; it has to be connected to the grounded terminal of the multimeter). Hold it nearly vertically. Carefully rotate the probe through 360° about the resting tip (keep your resting tip still, slightly lift the moving tip off the paper and place it back at a different location). The multimeter shows the potential rise/drop between the resting tip and the moving one. Describe what do you observe happening to the readings on the multimeter? Note: in all questions below “a value” represents an actual reading and could be positive or negative (“a magnitude” is never negative). Make a sketch of the situation you observed in part 15 when you were moving the tip (electrodes, two points with potentials, show which point represents the resting tip), and show the location of the moving tip when the reading on the multimeter reached its maximum value. Write the maximum value for the reading between the resting tip and the moving tip observed while you had made a 360 0 rotation Vmax =Write the minimum value for the reading between the resting tip and the moving tip Vmin =  For the values in questions 17 and 18, the electric field points … (check all correct answers) [ ] from the moving tip toward the resting tip when Vmax is reached. [ ] from the moving tip toward the resting tip when Vmin is reached. [ ] from the resting tip toward the moving tip when Vmax is reached. [ ] from the resting tip toward the moving tip when Vmin is reached. how to use single probe and measure the potential at each of the equipotentials?what is the work i would have to do in order to move a point charge of 2μC from the first equipotential to the second one? Attachment 1 Attachment 2 Attachment 3 Attachment 4 ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-09 at 1.02.59 AM.png ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-09 at 1.05.49 AM.png ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-09 at 1.07.24 AM.png ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-09 at 1.10.33 AM.png

how to derive the tangegntial acceleration? Thanks Attachment 1 Attachment

Question how to derive the tangegntial acceleration? Thanks Attachment 1 Attachment 2 ATTACHMENT PREVIEW Download attachment Screenshot 2019-07-08 at 6.40.30 PM.png 5. A student suggested that the discrepancy in Question 4 is because of the ignorance of friction of the pulley. This friction, f, causes a difference between the tensions of the horizontal part, Tx (from the disk to the pulley), and the vertical part, Ty (from the pulley to the hanging mass) of the string, i.e. Tx # Ty. To verify this student’s idea, consider the downward motion, where Txt f= Ty. Re-derive the expression of the tangential acceleration, a’down, of the mass with consideration of friction. After that, take an approximation, Mtotal

updated my question including the instructions, thanks! Attachment 1 Attachment

Question updated my question including the instructions, thanks! Attachment 1 Attachment 2 Attachment 3 Attachment 4 Attachment 5 ATTACHMENT PREVIEW Download attachment Screenshot 2019-07-08 at 6.40.30 PM.png 5. A student suggested that the discrepancy in Question 4 is because of the ignorance of friction of the pulley. This friction, f, causes a difference between the tensions of the horizontal part, Tx (from the disk to the pulley), and the vertical part, Ty (from the pulley to the hanging mass) of the string, i.e. Tx # Ty. To verify this student’s idea, consider the downward motion, where Txt f= Ty. Re-derive the expression of the tangential acceleration, a’down, of the mass with consideration of friction. After that, take an approximation, Mtotal

A person stands on a scale inside an elevator at

Question A person stands on a scale inside an elevator at rest (see the figure below). The scale reads W = 738 N.(a) What is the person’s mass?  kg(b) The elevator accelerates upward momentarily at the rate of a = 3 m/s2. What does the scale read then?  N(c) The elevator then moves with a steady speed of 6 m/s. What does the scale read now?  N

If a 0.6 kg object hanging from a spring stretches

Question If a 0.6 kg object hanging from a spring stretches it by 0.80 m, then by how much will the spring be stretched (in m) if a 1.2 kg object is suspended from it?

A centripetal force of 165 N acts on a 1,850-kg

Question A centripetal force of 165 N acts on a 1,850-kg satellite moving with a speed of 5,400 m/s in a circular orbit around a planet. What is the radius of its orbit?

answer the following physics questions

Complete the multiple choice questions with accuracy please. I attached the document with the questions, read carefully and send the answers as a word document

Would like to find a tutor in multiferoics

Question Would like to find a tutor in multiferoics

  1. A bowling ball was timed with a stopwatch

Question

  1.  A bowling ball was timed with a stopwatch and the travel time was estimated at 2.40 seconds with an uncertainty of 0.10 seconds. The distance the path of the bowling lane was found to be 18.288 ± 0.330 m. Find the speed of the bowling ball, sm. On a separate piece of paper, write the equation for speed: s=dt. Find the value of s, Δs, and sm. Show your work.
  2. The sides of a sugar cube are found to have a length of 1.702 cm with an uncertainty of 0.240 cm. Find the volume of the sugar cube, Vm. On a separate piece of paper, write the equation for volume: V = I3. Find the value of V, ΔV, and Vm. Show your work.

Find the volume of an ellipsoid given that axis a

Question Find the volume of an ellipsoid given that axis a is 12.0 ± 0.5 cm, axis b is 8.5 ± 0.5 cm, and axis c is 9.8 ± 0.5 cm. On a separate piece of paper, write the equation for area: V=(43)πabc. Find the value of V, ΔV, and Vm. Show your work.

When light of wavelength 150 style=”color:rgb(0,0,0);background-color:rgb(255,255,255);”> nm falls on a

Question When light of wavelength 150 style=”color:rgb(0,0,0);background-color:rgb(255,255,255);”> nm falls on a cesium surface, electrons having a maximum kinetic energy of 6.14 eV are emitted. Find values for the following. (a) the work function of cesium eV (b) the cutoff wavelength nm (c) the frequency corresponding to the cutoff wavelength Hz

The value of specific heat for copper is 390 J/kg⋅C∘,

Question The value of specific heat for copper is 390 J/kg⋅C∘, for aluminum is 900 J/kg⋅C∘,and for water is 4186 J/kg⋅C What will be the equilibrium temperature when a 265 g block of copper at 255 ∘C is placed in a 135 g  aluminum calorimeter cup containing 875 g of water at 14.0 ∘C?

Consider a planet following an elliptical orbit around a star.

Question Consider a planet following an elliptical orbit around a star. The planet has a mass m and the star has a mass M.(a) What is the gravitational torque on the planet when it is a distance D from the star?(b) When the planet is at its furthest distance dmax from the star, it has speedvmin. It will have its maximum speed when it is closest to the star, at dmin. What is that speed in terms of the given variables?(c) How far is the center of mass of the system from the center of the star when the planet is at dmax? How far is the center of mass of the system from the star when the planet is at dmin?(d) The equation for the gravitational potential energy of the planet under the force from the star is proportional to r−2, which means it has no local minima or maxima. This does not mean the orbit has no equilibrium states, since both the star and planet are actually both orbiting around the center of mass of the system. To think about this, physicists use a math trick to treat the system as if it is one object acting under an external force. The “effective potential” of this system is given in terms of the angular momentum of the system and the reduced mass parameter μ. The distance r refers to the distance between the “combined” object and the center of the orbit. Given a plot of the effective potential below, label the equilibrium distance. Is this a stable or unstable equilibrium?Figure 1: Effective potential energy of a two-body orbital system. The variable r is on the x-axis, and Ueff is on the y-axis. Units are arbitrary.(e) The above applies to systems of two objects interacting under gravity, and during the orbit the value of r will vary. Adding more objects to the system complicates the picture, and requires computer simulations to solve. However, it can be shown that when adding a large planet, the effective potential changes such that if r gets large enough the first planet will be thrown out of the solar system. Draw a modified version of the plot above that qualitatively shows this effect. ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-08 at 5.11.16 PM.png

Everyone should know that when climbing a ladder, it is

Question Everyone should know that when climbing a ladder, it is important to have a partner at the base holding the ladder in place. Imagine a woman with a mass of 65 kg climbs a ladder placed leaning against a frictionless wall at an angle of 60◦ above the horizontal. The ladder is 3.5 m long and weighs 8.0 kg. There is a frictional force acting at the base with a coefficient of static friction μs = 0.25, and a man holds the ladder at a point about a meter and a half above the ground.Treat the applied force by the man holding the ladder as acting horizontally. If the woman climbs until her center of mass is 2.5 m above the ground, what force—if any—must the man apply to the ladder to keep it from slipping?

Marvel superheros Danny Rand and Luke Cage are surrounded by

Question Marvel superheros Danny Rand and Luke Cage are surrounded by enemy assailants. They decide to perform a move called “Patty Cake” in which Danny does his glowing Iron Fist punch into Luke Cage’s palms. Rather than flying back—which one might expect—Luke holds his ground and a shockwave flies out and knocks over the assailants. Now, this interaction isn’tentirely unrealistic, as a shockwave carries momentum in all directions (the shape of the wave depends on how much is carried in each direction). But, the fact that both Luke and Danny are able to stay rooted is pretty unrealistic for other reasons.Danny Rand’s super powers are all about him focusing energy flow, so we can assume his mass to be that of an average height, lean, muscular man—about 80 kg. The coefficient of static friction between rubber shoes and concrete is 1.0. Suppose Danny’s punch exerts a constant force of 105 N over 10 ms on Luke’s hands1. What is the impulse delivered to Danny by Luke’s hands during this time?Let’s look at the system consiting only of Danny. Explain why the friction between him and the ground is negligible and will not keep him rooted. If he starts at rest, what is his final velocity after the impulse from above? If you didn’t get an impulse above, you may use 80 N s. If you don’t get a velocity here, you may use 10 m/s for later parts.How much kinetic energy was imparted to Danny? Is this an elastic collision?1This is about the average force of a seatbelt on your chest when you hit a barrier going 60 mph, over roughly the same time interval. A normal human boxer can punch with about 5,000 N of force over a similar period of time.

A firework explodes on Independence Day, breaking its shell into

Question A firework explodes on Independence Day, breaking its shell into three pieces (This happens so quickly that we can ignore the effects of gravity on the system). The first piece has a mass of 0.50 kg and flies off at 50 m/s. The second piece has a mass of 0.40 kg, and flies out at a speed of 60 m/s and an angle 170◦counterclockwise from the path of the first. The final piece has a mass of 0.45 kg.(a) What is the speed of the final piece? In what direction is its velocity?(b) How much energy from the powder in the firework was used to explode the shell? Neglect the energy contribution to the light and sound of the blast.

What are the proper guidlines for a physiology lab report?

Question What are the proper guidlines for a physiology lab report?

Mr. X is pushing a shopping trolley at a steady speed of

Mr. X is pushing a shopping trolley at a steady speed of 1.3 m/s. The trolley’s mass is 42 kg. He notices a large spill on the floor at 1.4 m ahead of the trolley. How much force would he have to apply in order to stop trolley before it reaches the spill area? (2-3 Paragraphs Maths Working)HHInitial Velocity – 1.3 m/sMass – 42 KGDisplacement – 1.4 mNet Force – ?

RENAL FUNCTIION1.What is the renal threshold (Tm) for glucose in

Question RENAL FUNCTIION1.What is the renal threshold (Tm) for glucose in mg/dL? What does this mean? Explain.2 When referring to tubular transport mechanisms, explain the difference between active and passive transport.3 To maintain normal blood pH of 7.4, the buffering capacity of the blood depends on these ions, which are readily filtered through the glomerulus and returned to the blood:  4 Following glomerular ultrafiltrate formation in Bowman’s space, hydrostatic pressure moves ultrafiltrate through the nephrons to various areas that perform selective functions. Name the selective function performed by each of the given structures. Choose from the following: ·        Active transport of chloride·        Active reabsorption of glucose, amino acids, salts·        Final concentration of urine by reabsorption of H2O under ADH control 5. Proximal tubule6. Ascending Loop of Henle7. Collecting duct 8 Explain the two major functions that tubular secretion serves.

A system consists of a thin and uniformly charged rod

Question A system consists of a thin and uniformly charged rod of length L = 0.5 m and net electric charge Q = -5 nC. What is the electric field of this system at the position P that is a distance y = 0.3 m “above” the middle of the rod? Express your answer in terms of the components of the electric field along the x and y axes.  

please help me answer ALL of these lab questions! src=”/qa/attachment/8339680/”

Question please help me answer ALL of these lab questions! src=”/qa/attachment/8339680/” alt=”8339680″ /> Attachment 1 Attachment 2 Attachment 3 Attachment 4 Attachment 5 Attachment 6 Attachment 7 Attachment 8 ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-09 at 12.12.18 AM.png PY 106 Section: Name: BU ID: Partner: Name: BU ID: Lab 2: Electric Field and Potentials Part 1. Theory. The purpose of this lab is to investigate the relation between electric field lines and equipotential surfaces (or lines) in two dimensions. You will use two metal electrodes and study the electric field and equipotential patterns associated with them. 1. Electric field is [ ] a scalar. [ ] a vector. [ ] it depends on the nature of the charges generating the field. 2. Potential is [ ] a scalar. [ ] a vector. [ ] it depends on the nature of the charges generating the field. 3. Check all statements that are correct. [ ] Electric field lines are always parallel to equipotentials. [ ] The angle between field lines and equipotentials depends on the nature of the charges generating the field. [ ] Electric field lines are always perpendicular to equipotentials. [ ] For any two points on the same E-field line, electric field line always points from a lower potential toward a higher potential. [ ] For any two points on the same E-field line, electric field line always points from a higher potential toward a lower potential. [ ] Electric field lines can cross each other. [ ] Electric field lines never cross each other. The picture on the right shows a region with a uniform electric field in it (field lines are not shown). . A The two thick lines represent two equipotentials. .B 4. Sketch electric field vectors at points A, B, and C. 30 V 5. Write an equation which you should use to calculate the magnitude of the electric field, |E|, at point B. . C -20 V ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-09 at 12.12.28 AM.png 6. Name only one (!) additional variable (shown in the picture) which value you need to know in order to calculate |E|. 7. Use a specific measuring device (you can find it on your table), measure the value for the variable named in question 6 and using that value calculate the magnitude of the electric field, |El, at point B in the region shown in the picture on page 1. The picture on the right shows a region with a uniform electric field in it (field lines are shown). Note: if you draw a line which passes through point A and is perpendicular to the field lines, it also passes through point B. 8. Draw an equipotential line through point A; draw an equipotential line through point C. 9. In the picture on the right, the distance between points B and C is equal to the distance between points A and C and equal to 5 m; the distance between points A and B is equal to 6 m; the potential at point C is equal to -200 V; the mag- nitude of the electric field in the region is 100 V/m. Use the data to find potential, VA, at point A. Also find, VB, at point B. VA = VB = 10. What is the change in the potential when moving from point A to point C? 11. When moving from point A to point C potential (state if it drops or rises) What is the potential drop/rise when moving from point A to point C? 12. What is the potential difference between points A and C? The picture on the right shows a field line and three points on it. Potentials at the points are V1 = -3 V, V2 =0 V, V3 = 3 V. Assume that in the region between points Pi and P3 electric field is uniform. 13. In which direction does electric field point at point P2? Explain the reason for your answer. 14. If you start at point P2 and move in the direction of the electric field, what is the change in the potential when you reach the next point shown in the picture? 15. If you start at point P2 and move in the direction of the electric field, what is the potential drop/rise when you reach the next point shown in the picture? ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-09 at 12.12.36 AM.png 16. Check below all statements that are correct. [ ] Equipotentials are always parallel to electric field lines. [ ] Equipotentials are always perpendicular to electric field lines. [ ] Electric field vector always points in the direction of the fastest increase in the potential. [ ] Electric field vector always points in the direction of the slowest increase in the potential. [ ] Electric field vector always points in the direction of the fastest decrease in the potential. [ ] Electric field vector always points in the direction of the slowest decrease in the potential. Part 2. The purpose of this part is to experimentally investigate the relationship between electric field lines and equipotential surfaces (lines) in two dimensions. At first you will use two bar electrodes. Then you will use a point electrode and a bar electrode and study the electric field and equipotential patterns associated with them. APPARATUS F DC power supply (25-40V max) Fo Multimeter Conductive paper FU Copper foil tape with conductive adhesive Scissors Pu Cork board Fu Assorted leads Fu Push pins The apparatus consists of a sheet of conductive carbonized paper, metallic tape used as the electrodes, push pins for connecting the power supply to the electrodes, and a multimeter with various probes for making measurements of potential, V. Potentials are often defined relative to some standard reference point that is taken to be zero. The reference point is often referred to as ground. In your lab the ground is the electrode with 0 potential (usually connected to the black prong of a power supply). The SI unit of potential is Joule/Coulomb that has been given the name Volt. 1. Making Electrodes: Use the 20 x 28 cm grid markings as a guide for dimensions. Make 2 parallel bar electrodes ~20 cm in length each. Have your electrodes spaced 20 – 25 cm apart so that measurements are more easily made. You will need to make measurements on both sides of the electrodes, so be sure to leave a couple of centimeters of space between the edge of the paper and your electrodes. Use the metallic tape and construct two parallel electrodes (see the picture on the right). Make sure that the tape is tightly adhered to the paper and free of wrinkles (by rubbing with the edge of your fingernail). 2. Because the black paper is conductive, potential difference between the electrodes sets up an electric field in the paper between them. You will be able to measure the potential rise/drop between any two points using two probes that are connected to a digital multimeter. You will use the multimeter as a voltmeter, which measures the potential rise/drop between its terminals. It is calibrated in volts with several scale settings.Read more ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-09 at 12.12.43 AM.png Probe I ‘Inl Voltmeler ii – 133:33 33232 P t nti 1: Since the adhesive on the back of the tape somewhat insulates the metal from the paper, it is necessary for you to determine the effective electrode potential for each electrode. To do this, insert push pins through each metal electrode and connect them with wires to a (usually red) and a — (or ground, usually black) terminalsiprongs of the power supply respectively (see the schematics above). Label the positive ( ) and negative (—) electrodes on the carbonized paper. Increase the voltage of the power supply to 25-30 volts. Setup the multimeter as a voltmeter on the appropriate scale. Connect the ground terminal (—) of the multimeter to the ground terminal (—) of the power supply. Make sure that when you touch the electrodes by a probe you read 0 V (when touching the grounded electrode) and 25- 30 V (when touching the positive electrode). The potential difference between the electrodes should be very close to the voltage setting of the power supply. if not, check that you have connected everything correctly and that your pushpins are making contact with the metal part of the tape. These potentials would have been the electrode potentials if the tape made perfect contact with the carbon impregnated paper, but it does not. Hence, determine the effective electrode potential for each electrode by measuring the potential on the paper very near to (~ 1 mm) but not touching the conductive tape. Make several measurements along each electrode and use the average value as the effective electrode potential. Write the effective potentials next to each electrode. You should observe no more than a ~5 volt difference between the potential measured directly on the tape and the potential measured 1 mm away from the tape on the paper. If that is not the case adjust the power supply voltage or rub the tape more tightly to the paper. Write the value for effective electrode potentials of your electrodes. V- = V = (ATTENTION: the difference between V. and V has to be at least 12 V! Otherwise, make adjustments to your setup) 4. Eguipotential Lines: Using the apparatus you will plot the equipotential lines — lines on which the electric potential is constant. Touch the probe of the meter to the paper approximately half way between the effective potentials. Mark this point with a pencil. Press the probe (keep it vertical), read the voltage, write it down. Now move the probe around the paper to find other points with the same potential (try to apply the same pressure every time when you use the probe). Mark each of these points with your pencil (note: keep about 1 cm between the points). Find at least six more equipotential points, then connect them together to form an equipotential line. Draw the equipotential line; label it with its potential. ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-09 at 12.12.50 AM.png 5. Repeat the procedure to plot more equipotential lines on each side of your first equipotential line; when drawing new lines increase/decrease your voltage by about 1 or 2 V. 6. You have to plot at least 7 equipotentials between the electrodes. Label all the lines with their voltages. 7. Take your conductive paper off the board and using your equipotential pattern draw five electric field lines. Calculate the average magnitude of the electric field for two different E-lines. Show your work. 8. What kind of a line (E-field or equipotential) runs along, or

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