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A copper wire has a resistance of 0.425 ohms at 20.0°C, and an iron wire has a resistance of 0.455 ohms at the same temperature. At what temperature are their resistances equal?
If the string were only 1/2 as dense as you found it to be how would the tension have to change in each case to produce the same number of segments (same wavelength)?
If each coil has 62 turns and has a mean radius of 66.0 cm, calculate the component of the earth magnetic field perpendicular to the entering electron beam:
How much work is required to bring three protons, initially infinitely far apart, to a configuration where each proton is 1.5*10^-15 m from the other two? (This is a typical separation for protons
A charge of 22.5 microC is located at (4.40m , 6.22m ), and a charge of -10.1microC is located at ( - 4.50m,6.75m). What charge must be located at (2.23m, - 3.31m) if the electric potential is to be
A 1.6kg wood block is pulled along a wood floor at a steady speed. A second wood block, with mass 4.2kg , is attached to the first by a horizontal string. What is the magnitude of the force pulling
Albert pujols is pitched a 0.145kg baseball at -39.m/s and he hits the ball on a horizontal line drives straight back toward the pitcher at 50.5m/s. if the contact time between bat and ball is 0.003
A screen is placed 48.0 cm from a single slit that is illuminated with light of wavelength 682 nm. If the distance between the first and third minima in the diffraction pattern is 3.10 mm, what is t
An object is observed in a certain frame to have a four-momentum of [Pt,Px,Py,Pz] = [7.0 kg, 5.0 kg, 2, 2]. Find its relativistic momentum in this frame.
The gravitational force is directed parallel to the plane in the same direction as the movement of the block. parallel to the plane in the opposite direction as the movement of the block perpendicul
An object slides on a level surface in the +x direction. It slows and comes to a stop with a constant acceleration of -2.45 m/s2. What is the coefficient of kinetic friction between the object and the
Parallel to the plane in the opposite direction as the movement of the block perpendicular to the plane. toward the center of the Earth.
What is the average net force (in N) that acts on the body as it comes to a stop in the water? You may assume that the acceleration of the body is constant as it descends through the water and you c
The center wire in a coaxial cable carries current 3.00 A in one direction, and the sheath around it carries current 3.00 A in the opposite direction. What magnetic field does the cable create at po
Calculate the tension T in the rope if the gymnast climbs the rope at a constant rate. Express your answer in newtons.
Charge A and charge B are 3.20 m apart, and charge A is +3.50 C and charge B is +4.10 C. Charge C is located between them at a certain point and the force on charge C is zero. How far from charge A
What recoil velocity does she acquire in response to a single shot from a stationary position, assuming that no external force keeps her in place?
When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees upon landing to reduce the force of the impact. A 75-kg man just befo
A 1950-kg car experiences a combined force of air resistance and friction that has the same magnitude whether the car goes up or down a hill at 31 m/s. Going up a hill, the car's engine produces 52
1040 Carbon Steel is a medium carbon steel. Determine the applied stress at failure for a crack the length of 5 mm using the following equation with Y = 1.
Assume a construction worker bangs his hammer, on average, 1100 times a day. How many stress cycles would this produce in a year? And how many in 5 years? Please show your work so i can compare it t
An accidental spark ignites the explosive, and the car breaks into two pieces, which then roll away along the same track. If one piece has a mass of 1.9 x 104 kg and a final speed of 2.0 m/s toward t
Two large parallel non-conducting sheets are spaced d = 2.80 cm apart and have a potential difference of magnitude 500 V. An electron is thrown directly away from one sheet, and is stopped just bef
What are (a) the work done by the rope's force, (b) the increase in thermal energy of the block-floor system, and (c) the coefficient of kinetic friction between the block and floor
A series of object are being rotated. The same net torque is being applied to each object. Rank the object in order of the resultant angular acceleration (1=lowest).