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An aluminum wire carrying a current of 4.0 A has a cross-sectional area of 9.0 10-6 m2. Find the drift speed of the electrons in the wire. The density of aluminum is 2.7 g/cm3. (Assume three electrons are supplied by each atom.)
In a student experiment, a constant-volume gas thermometer is calibrated in liquid nitrogen (?196°C) and in boiling allyl alcohol (97°C). What value of absolute zero does the calibration yield
What is speed of the second train, which travels faster
Which is safer as a road material
A light string is wrapped around a solid cylinder and a 200 g mass hangs from the free end of the string, what is the tension and the mass of the cylinder
The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3. Explain how high does the top of the ice block float above the water level?
An insulating sphere has a total excess charge Q distributed uniformly throughout the shere. Use Gauss's Law to calculate the electric field inside the sphere at a distance r
A silver wire has a cross sectional area A = 2.0 mm2. A total of 9.4 × 1018 electrons pass through the wire in 3.0 s. What is the drift velocity of these electrons
A 10cm diameter circular wire loop carries a current of 2.4A, Find the torque on the loop in a 1.2T magnetic field directed perpendicular to the loop
A 35kg child slides down a playground slide at aconstant speed, The slide has a height of 4.0mand is 7.4m long, find the magnitude of the kinetic friction force acting on the child
The intensity in normal conversation, when about50 cm from the speaker, Estimate the power output of sound from a person speaking in normal conversation
An electron starts from rest 75.5 cm from a fixed point charge with Q = -0.150 µC. How fast will the electron be moving when it is too far away.
The student realizes that the spring demonstrates SHM with the attached mass of 255.0 g. The student is next asked to calculate the period of oscillation, T
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