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A solenoid is .15m long, has a radius of .04m, and contains 1250 turns. It is hooked up to a 9-v battery and a switch. When the switch is closed it takes 35 milliseconds to reach 75% of the maximum current. What is the resistance of this circuit?
A 77 person stands on the uniform ladder 4.0 long, that weighs 100. The floor is rough; hence, it exerts both a normal force, and a frictional force, on the ladder. The wall, on the other hand, is frictionless; it exerts only the normal force.
The following data table gives the position of an object during freefall. What is the instantaneous velocity of the object when it is at position 3?
During a baseball game, a batter approaches the plate. The pitcher hurtles the ball in the direction of the batter at a speed of 85 miles per hour. What is the relative velocity of the system immediately after the collision
a 30.0 g ball of clay traveling east at 7.50 ms collides and sticks together with a 30.0 g ball of clay traveling north
In a particular crash test, an automobile of mass 1217 kg collides with a wall and bounces back off the wall. The x components of the initial and final speeds of the automobile are 15 m/s and 3 m/s, respectively. If the collision lasts for 0.12 s,..
A gun with muzzle velocity of 1200 ft/sec is fired at an angle of eight degrees above the horizontal. Find the horizontal and vertical components of the velocity
A 1.000 m long sight rod is viewed by a theodolite which has an objective lens of focal length 240mm. the centre support of the theodolite is 77.5 mm behind the objective lens. The image of the rod on the g reticule is 1.5 mm high.
A uniform line of charge that is 5.00cm long has a total charge of 6.00uC. An electron is at distance of 5.00cm from one end of the charge distribution, What is the electric field at the electron
A mass m = 15 kg is pulled along a horizontal floor, with a coefficient of kinetic friction ?k = 0.1, for a distance d = 5.1 m. What is the work done by gravity as it comes to rest
What is the magnitude of the acceleration of the girl?
A person of mass 80.0kg stands at the center of a rotating merry-go-round platform of radius 2.50m and moment of inertia 910kg*m^2. Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk
A piston-cylinder device contains a gas that expands by the relationship pV = C. If p1 = 6 MPa, V1 = 0.02 m3 and V2 = 1.0 m3, determine the final pressure
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