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How many coulombs of positive charge are there in 4.00 kg of plutonium, given its atomic mass is 244 and that each plutonium atom has 94 protons?
As a person walks, the femur (upper leg bone) slides in a socket in the hip, Find the frictional force on the bone in the hip joint
A solenoid1.20m long and2.80cm in diameter carries a current of21.0A. The magnetic field inside the solenoid is 21.0mT. Find the length of the wire forming the solenoid.
one end of a copper rod is in thermal contact with a hotresrvoir at T=500K, and the other end is in thermal contact with acooler resvoir at T=300K. find the entropy change of each reservoir
You have a spherical mirror with a radius of curvature of+15cm (so it is concave facing you). You are looking at an object whose size you want totriplein the image, so you can see it better. Where should you put the object? Where will the image be? W..
A 6 µF capacitor carries a charge of 20 µC. If it is connected in a loop with a 5 ? resistor, what is the energy stored in the capacitor 8 µs after the connection is made
A uniform ladder of length L and weight 235 N rests against a vertical wall. What is the smallest angle the ladder can make with the floor without slipping
An 1100 kg airplane starts from rest; 7.1s later it reaches its takeoff speed of 40m/s. What is the average acceleration of the airplane during this time?
A heavy sled is being pulled by two people as shown in the figure. The coefficient of static friction between the sled and the ground is ?s = 0.571, and the kinetic friction coefficient is ?k = 0.467. what is the sled\'s acceleration
On a banked race track, the smallest circular path on which cars can move has a radius of 109 m, Find the largest speed at which cars can move on this track without relying on frictio
A 3.7 kg block of copper at a temperature of 86°C is dropped into a bucket containing a mixture of ice and water whose total mass is 1.2 kg. How much ice was in the bucket before the copper block was placed in it
The density of ice is 917 kg/m3, and the density of seawater is 1025 kg/m3. A swimming polar bear climbs onto a piece of floating ice that has a volume of 4.97 m3. What is the weight of the heaviest bear that the ice can support without sinking compl..
A skier starts from a height of 200 meter and slides down a frictionless slope. Find the speed of the skier at a height of 56 meter
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