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An automobile's battery is connected to an electric motor that is used to move up a load. The battery stays at a constant temperature, receiving heat from the air that surroundings it. Is this a violation to the Second Law of thermodynamics? Explain.
A spacecraft has a nonrelativistic (or classical) momentum whose magnitude is 7.0 1012 kg · m/s. Find the relativistic momentum of the spacecraft
An athlete training for an event does 6.53 104 J of work during a workout and gives off 6.17 105 J of heat, Determine the magnitude of the change in internal energy of the athlete
A fully charged capacitor with a voltage of 270 kV is discharged through a resistor. What is the voltage across the capacitor at the end of four time constants?
q1. an emf is induced in a conducting loop of wire 1.22 m long as its shape is changed from square to circular.
A thick-walled copper pipe (inner radius a and outer radius b) is centered on the z-axis and carries a current density of magnitude J(r)=B*r. (The parameter B has units A/m^3). A wire runs parallel to the pipe a distance R=2*b away from the z-axis..
You would like to shoot an orange out of a tree with your bow and arrow. The orange is hanging 5.00 m above the ground. What is the height of the arrow above the ground once it has travelled the 43.0 m horizontally
Two point charges Q1 = 3.6 µC and Q2 = 8.0 µC are initially very far apart. They are then brought together, How much work does it take to bring them together
a dish of hot food has an emissivity of 0.39 and emits 15 w of thermal radiation. if you wrap it in aluminum foil which
the combination of two circular coaxial coils of radius a separated by a distance also equal to a with equal currents i
Two long, straight wires are separated by 0.12 m. The wires carry currents of 1.0 A in opposite directions, as the drawing indicates. Find the magnitude of the net magnetic field at the point A
Standing at a crosswalk, you hear a frequency of 550 Hz from the siren of an approaching ambulance. Determine the ambulance's speed from these observations
a jogger runs in a straight line with an average velocity of 5.1ms for 2.1 min and then with an average velocity of 4.9
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