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The magnetic flux threading a metal ring varies with time t according to 3at^3-bt^2, with a = 7.7s^-3m^2T, and b = 2.8 s^-2m^2T.
Discuss which scattering mechanism dominates the thermal conductivity K of the sapphire crystal at 20 k.
A piece of solid metal weighing 322 grams is placed into a graduated cylinder, which is then filled with liquid mercury. The metal does not float.
A solid object made out of lead has a volume of 24.0 cm3 and is supported (from above) by a string while the object is completely submerged in water.
A proton makes a head-on collison with an unknown particle at rest. The proton rebounds straight back with 4/9 of its initial kinetic energy.
A tank of oil, p=670kg/m^3, develops a leak. The leak is 6m below the open surface of the tank.
The coefficient of friction for all surfaces is f= .20. A horizontal force P is applied to A to slide both objects across the horizontal table.
Tarzan tries to cross a river by swinging from one bank to the other on a vine that is 10.0 m long. His speed at the bottom of the swing.
A slide-loving pig slides down a 37° inclin in twice the time it would take to slide down a frictionless 37° incline.
A helium-filled balloon is being transported in a car. As the car accelerates away from a stop light, in which direction does the balloon move relative to the c
A 10-cm-long spring is attached to the ceiling. When a 2.0 kg mass is hung from it, the spring stretches to a length of 15 cm.
A knight in armour on a horse leaves the castle. His squire has mistakenly lowered the drawbridge 20 degrees below the horizontal.
Imagine that you swing about your head a ball attached to the end of a string. The ball moves at a constant speed in a horizontal circle.
Calculate the spring's elastic constant. If the 50 N load were replaced with a 80 N weight, how far would the spring stretch?
Will the center of mass of this system be (1) nearer to the 4.0 kg mass, (2) nearer to the 6.0 kg mass, or (3) at the center of the rod? Why?
A spring is compressed 10 cm by pushing a body against it. When released the spring pushes the body towards another identical spring.
A 16 g rifle bullet traveling 150 m/s buries itself in a 4.0 kg pendulum hanging on a 3.3 m long string, which makes the pendulum swing upward in an arc.
The by Pass Ratio of the JT9D-3A engine is 5.17:1. If the air mass flow through the fan is 577 kg/s, determine the air mass flow through the core.
A hoop of radius 0.5 m and a mass of 0.2kg is released from rest and allowed to roll down an inclined plane.
A 75 kg athlete does a single handstand. If the area of the hand is in contact with the floor is 125 cm^2, what pressure is exerted on the floor?
A safe with a mass of 150kg is at rest on the floor. what is the minimum horizontal force needed to move the safe if the coefficent of static friction.
Assuming the same braking force, what distance does this car require to stop when it is traveling twice as fast?
By what factor should the tension in this string be changed to produce waves with a speed of 32 m/s?
How large is the coefficient of kinetic friction if the plane make an angle of 25 degrees with the horizontal?
An 79.1 kg astronaut is working on the engines of his ship, which is drifting through space with a constant velocity.