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a) Find the resistance of a 1.3m length of gold wire with diameter 4.2×10^-5m . Express your answer to two significant figures and include the appropriate units.
b) Find the resistance of a 1.3m length of gold wire with diameter 4.7×10^-4m . Express your answer to two significant figures and include the appropriate units.
c) Find the resistance of a 1.3m length of gold wire with diameter 6×10^-3m . Express your answer to one significant figure and include the appropriate units.
A .025 nm photon is incident on an electron. It is scatteredat an angle of 140o. What is the Kinetic engergy of the recoiling electron
question a mirror produces a 10 cm high image of an object that is only 4cm high. if the image is also real and
Calculate the magnetic force per meter between two such lightning bolts separated by 10 meters. (This is mainly to give a feeling for the strength of the magnetic field)
3.09 moles of neon, a monatomic gas, starts out at conditions of standard temperature and pressure. The gas is heated at constant volume until its pressure is tripled, then further heated at constant pressure until its volume is doubled. Assume that ..
A 9kg mass is connected by a a string over a frictionless pulley to a 5kg block sliding on the table.The coefficient of friction is 0.2, find the tension in the string.
A flight attendant pulls her 64 N flight bag a distance of 370 m along a level airport floor at a constant velocity. The force she exerts is 45 N at an angle of 51° above the horizontal.
An elevator is able to raise 9,800 N to a height of 37 m in 12 s, What is the elevator's power output and How much work does the elevator do
A parallel plate capacitor has square plates with sides of length 10 cm. The distance between the plates is 4 mm. What is the amount of charge on each plate
A centrifuge in a medical laboratory rotates at an angular speed of 2000 rev/ min. Find the constant angular acceleration of the centrifuge
A bob (small ball) is attached to the lower end of a cord that is attached to the cieling and moves in a horizontal circle at a constant speed. (The cord sweeps out a cone as the bob rotates.) The bob has a mass of 0.040 kg, the cord has a length ..
A pulsar is a rapidly rotating neutron star that continuouslyemits a beam of radio waves in a searchlight manner. Determine the average angular speed (in rad/s) of this pulsar
a 15 kg box is skid down a 6 meter high ramp to pick up speed to do a veritcal loop-the-loop whose radius is 2 meters. What is the speed at the top of the loop-to-loop
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