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Q1. An engineer needs a resistor with zero overall temperature coefficient of resistance at 20oC. She designs independent of temperature and a uniform radius of r = 1.50 mm. Can she meet design goal with this method? If so, state what you can determine about the lengths l1 and l2 of each segment. Ω a pair of circular cylinders, one of carbon and one of Nichrome. The device ought to have an overall resistance of R1 + R2 = 10.0
Q2. How much heat does it take to enhance the temperature of 8.00 of an ideal monatomic gas from 22.0 to 61.0 if the gas is held at constant volume?
A gardener pushes a box of tools across a driveway by applying a 20.5- N force that pushes downward at an angle of 34.9 o with respect to the horizontal
A charge q = +929 ?C is uniformly distributed on a thin nonconducting ring of mass m = 0.60 g and radius r = 2.60 cm. What is the final angular velocity of the ring
You have designed a rocket to be used to sample the local atmosphere for pollution. It is fired vertically with a constant upward acceleration of 18 m/s2. Determine the total time the rocket is in the air
A sinusoidal wave travels along a stretched string. A particle on the string has a maximum velocity of 0.900m/s, What is the amplitude of the wave
a 2.5 kg object slides along a frictionless horizontal table with an initial speed to the left. it strikes a coiled spring ( force constant= 500. N/m), calculate the force exerted by the bumper on the object
A person with mass mp = 70 kg stands on a spinning platform disk with a radius of R = 2.13 m and mass md = 187 kg. What is the final angular velocity of the disk
Ions having equal charges but masses of M and 2M are accelerated through the same potential difference, what is the radius of the arc followed by the lighter
A circular coil enclosing an area of 140 cm2 is made of 190 turns of copper wire. The wire making up the coil has resistance of 3.0 Ohms, what is the average current in the coil during that time
A block of mass 0.570 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x. The force constant of the spring is 450 N/m.
A ball of mass 0.1 kg is suspended vertically from the ceiling with a "massless" string and brought to rest. what will be the magnitude of the resulting angular acceleration
A student has a stretched string on density u and length L under a tesnion F. A standing wave of frequency f = 4/4 squareroot, Calculate the length of the string
A circuit contains six 205 ohm lamps with 60 W bulbs and a 9 ohm heater connected in parallel. voltage across the circuit is 120 V.what is the current in the circuit when four lamps are turned on.
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