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At an accident scene on a level road, investigators measure a car's skid mark to be 93m long. The accident occurred on a rainy day, and the coefficient of kinetic friction was estimated to be 0.42. Use these data to determine the speed of the car when the driver slammed on (and locked) the brakes. Why does the car's mass not matter?
What would be the equilibrium temperature when a 253-g block of copper at 281^circ C is placed in a 137g aluminium calorimeter cup containing 817-g of water at 14.5^circ C.
A wrecking yard inventor wants to pick up cars by charging a 0.400 m diameter ball and inducing an equal and opposite charge on the car. What is the electric field near the surface of the ball
At a pressure of 0.0500 atm a constant-volume ideal gas thermometer reads a temperature of 345 K. What is the thermometer's triple point pressure, Pt
A closely wound rectangular coil of 85.0 turns has dimensions of 26.0cm by 46.0cm. estimate the average emf induced in the coil
q1. a planet of mass 6.00 1025 kg is in a circular orbit of radius 2.00 1011 m around a star. the star exerts a force
The springs of a 1200 kg car compress 5.0 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, what will be the frequency of vibrations
A cyclotron designed to accelerate protons has a magnetic field of magnitude 0.590 T over a region of radius 1.40 m, What is the cyclotron frequency
A man stands on a platform that is rotating (without friction) with an angular speed of 1.1 rev/s; his arms are outstretched and he holds a brick in each hand. What provided the added kinetic energy
Calculate the power spectrum of a square pulse with amplitude, A and length t. Plot the power spectrum, showing several zero-crossings. Demonstrate that the bandwidth (in frequency) in inversely proportional to t.
In a pairs figure skating competition, a 65 kg man and his 45 kg female partner stand facing each other on skates on the ice. what is the velocity of her partner
A series ac circuit contains a 230? resistor, a 13.0mH inductor, a 2.50?F capacitor, and an ac power source of voltage amplitude 45.0Voperating at an angular frequency of 360rad/s. Find the average power delivered to the entire circuit
Two trees have perfectly straight trunks and are both growing perpendicular to the flat horizontal ground beneath them. What is the magnitude of the squirrel's displacement
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