1) A resistor has a value of 20 ohms (Ω) when it is at 15 degrees Celsius. If the coefficient of thermal resistivity is 3.5 x 10-3/ Celsius, determine the value of the resistance at 97 degrees Celsius. Write your result to 3 significant figures. 2) A certain copper wire has a resistance of 10.0 ohm (Ω).  a) At what point should the wire be cut so that the resistance of one segment is 4 times the resistance of the other segment? b) What is the resistance of each segment?

Q: A 25 N force pushes a box up a ramp to the back of a truck If the force does 200 J of work, how long…

A: Force applied on a box up a ramp is,                                              Work done by the…

Q: A 10 kg runaway grocery cart runs into a spring with spring constant 240 N/m and compresses it by 62…

A: Mass (m) = 10 kg spring constant (k) = 240 N/m Maximum compression in spring,      x = 62 cm = 0.62…

Q: he metabolic power for typing is 150 W for Lili, not a lot as you know probably. How long does it…

A:

Q: a man pulls up a box of mass 70kg using an inclined plane of effective length 5m unto a platform…

A: Mass of the box  m = 70 kgLength of the incline L = 5mHeight of the incline = 2.5 mAngle of the…

Q: As a science fair project, you want to launch an 700 g model rocket straight up and hit a…

A: Mass, m = 700 gh = 26 mF = 17.6 Nu = 17 m/s

Q: A teacher shouting at the top of his lungs emits about 1.0 W of energy as sound waves. Student A is…

A: Power, P = 1 WDistance, r1 = 2 mDistance, r2 = 20 m

Q: Consider a reflecting ball (radius = R) for which an object at distance d from the surface has an…

A: Object distance is The size of image is ; here  represents size of image and  represents size of…

Q: If the velocity of an object is tripled and the direction changes from south to north, the momentum…

A: The momentum of an object is defined as the product of mass and velocity of the object.So,Momentum…

Q: With the temperature held constant, the pressure of a gas in a cylinder with a movable piston is…

A: Initial pressure is Final pressure is The unit of volume is always  thus the initial volume is…

Q: An ideal gas is confined to a constant volume container and heated from a pressure of 1 atm at room…

A:

Q: Two electric charges Qa=-2.7μC and Qb 22μC are initially located To =80cm apart. Calculate the work…

A: The initial potential energy of the system is given by the final potential energy of the system is…

Q: Motor A does 240 J of work in 24 seconds. Calculate power. Motor B does 240 J of work in 8 seconds.…

A: For motor A:Work done, W = 240 JTime, t = 24 sFor motor B:Work done, W = 240 JTime, t = 8 s

Q: You hold a softball with a weight of 1.80 N in your hand as shown in the figure. Your arm is moving,…

A:

Q: A 10-cm-tall object is located in front of a diverging lens with a power of -5 diopters. 1)…

A:

Q: A record rotates through 5.6 radians as it slows down uniformly from 78.0rpm to 22.8 rpm. What is…

A: The objective of the question is to find the magnitude of the angular acceleration of the record. We…

Q: state, a single electron orbits the nucleus with a radius of 52.9 pm (5.29 x 10-11 nm) and a speed…

A:

Q: The densest known element is osmium with a density of ? = 22.4 g/cm3. Suppose two small spheres of…

A:

Q: Three nonparallel, nonzero forces act on the rigid body shown. What must be true for this body to be…

A: For the given force system, we need to determine the choice for the object to stay in equilibrium.

Q: Select the statement that correctly completes the description of phase difference. Phase difference…

A: Phase difference represents the difference in the phase angle between any two waves at any given…

Q: The index of refraction for violet light in sillica flint glass is 1.66 and that for red light is…

A: GivenThe apex angle of the prism, The angle of incidence on the prism, The refractive index for…

Q: After a 70 kg person steps from a boat onto the shore, the boat moves away with a speed of 0.7 m/s…

A:

Q: ▾ Part A B (B=26.5) B-A= 22.7 56.0% Ā (A = 44.0) 28.0° C(C=31.0) Given the vectors A and B shown in…

A:

Q: 3. Consider a ring space station, rotating counterclockwise at 0. 6282 rad/s. C. 0.6282 rad/s thor…

A:

Q: An astronaut is flying at a distance of 317kms from the center of a blackhole of mass 2E32 kg. From…

A:

Q: The drawing shows a square, each side of which has a length of L = 0.250 m. Two different positive…

A: The electric potential at distance  due to a charge  is given by, is Coulomb's constant.

Q: Problem 5. As a parallel-plate capacitor with circular plates 20 cm in diameter is being charged,…

A: (a)

Q: Find the x and y-coordinates of the center of gravity of a 4.00-ft by 8.00-ft uniform sheet of…

A:

Q: What is the direction of the torque for each of the following situations?   right is in the…

A: right is in the positive x-directionleft is in the negative x-directionup is in the positive…

Q: Justin, with a mass of 55 kg, is going down an 8.0-m-high water slide. He starts at rest, and his…

A:

Q: The figure above shows, in cross section, two long parallel wires spaced by distance d; each carries…

A: We have given two long parallel wires spaced by distance d; each carries a current i. The direction…

Q: A hoop of mass M= 4 kg and radius R = 0.4 m rolls without slipping down a hill, as shown in the…

A: M=4 kgR=0.4 mvi=4 m/sh=4.3 m

Q: ball of 100 kg is dropped from an upper story dorm window. Neglecting air resistance what is the…

A: Mass of a ball,m=100kgThe initial speed of the ball u=0m/sec The height of the ball h=25mTo…

Q: In a physics experiment, a metal bar is balanced on a fulcrum. A 5.0 kg mass is placed on the bar,…

A:

Q: 3. A single slit of width 0.31 mm is illuminated with monochromatic light of wavelength 480 nm, and…

A:

Q: The mass of a hot-air balloon and its occupants is 358 kg (excluding the hot air inside the…

A: Mass of balloon Density, Volume of the heated balloon is, Pressure, To determine thatWhat…

Q: a) b) c) d) What is the current l? How much power is dissipated by the unknown resistor R? You…

A:

Q: Which of the following statements are true?       The magnitude of torque is the same for any axis…

A:

Q: A drone is initially flying on a heading 40 degrees south of west at a speed of 284 knots. (A knot…

A:

Q: Part A What is the particle's speed at B? Express your answer with the appropriate units. VB =…

A:

Q: A 23.0-kg cannonball is fired from a cannon with muzzle speed of 1 150 m/s at an angle of 36.0° with…

A: Mass of ball= 23 KgFired angle for first case = 36 °Fired angle for 2nd ball = 90°.Initial speed of…

Q: The drawing shows two identical systems of objects; each consists of the same three small balls…

A:

Q: Problem 1. Two long wires are oriented so that they are perpendicular to each other. At their…

A:

Q: An electromagnetic wave of frequency 1E12 Hz is emitted from the surface of the Earth toward a…

A: Emitted frequency of electromagnetic wave f0=Altitude of the satellite above Earth surface Speed of…

Q: Determine the electric potential energy for the array of three charges in the drawing, relative to…

A:

Q: Light in Oil A ray of light impinges on a surface of olive oil. Calculate the light speed in the oil…

A: Wavelength is Angle of incidence is Angle of refraction is Note:Refractive index for air is Speed of…

Q: An astronaut of mass 60 kg is on a space walk when suddenly someone throws a 3 kg book to her with…

A:

Q: An object is 26 cm in front of a converging lens with a focal length of 13 cm. Use ray tracing to…

A:

Q: Which of the following is least reasonable regarding stars on a Hertzsprung-Russell diagram?…

A: The Hertzsprung-Russell (H-R) diagram is a scatter plot of stars showing the relationship between…

Q: A system of two objects has AKtot = 7 J and AUint = -4 J. ▼ Part A How much work is done by…

A: total change in kinetic energy =total change inpotential energy =

Q: A child is pushing a merry-go-round. The angle through which the merry-go- round has turned varies…

A:

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.