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A circular disk 0.3 in diameter, pivoted about a horizontal axis through its center , has a cord wrapped around its rim. The cord passes over a frictionless pulley P and is attached to a body of weight 20kg. A uniform rod 1 meter long is fastened to the disk with one end at the center of the disk. The apparatus is in equilibrium, with the rod horizontal as shown.
a. what is the weight of the rod?
b. what is the new equilibrium direction of the rod when a second body weighing 2kg is suspended from the outer end of the rod ?
The diffraction pattern of a uniformly illuminated double-slit aperture consists of bright fringes spaced 5.00 cm apart on a screen 2.00 m from the aperture. what is the slit width and slit seperation
After falling from rest from a height of 28 m, a 0.46 kg ball rebounds upward, reaching a height of 18 m. If the contact between ball and ground lasted 1.7 ms, illustrate what average force was exerted on the ball?
Two radio-frequency point sources S1 and S2, separated by distance d = 1.6 m, are radiating in phase with ? = 0.4 m. How many maxima does it detect
An engine transfers 2.5 X 103 J of energy from a hot reservoir during a cycle and has an efficiency of 0.3. How much heat is transferred as exhaust to a cold reservoir
You are driving down the road at 60 km/hr when you see a chicken dash out onto the road 23.3 m in front of you. What was your reaction time
Two trains, each having a speed of 38 km/h, are headed at each other on the identical straight track. A bird that can fly 70 km/h flies off the front of one train while they are 68 km apart and heads directly for the other train. On reaching other tr..
The tension in the string when the ball is at the very bottom of the circle is 4.3 N. At the very bottom of the circle, a very sharp knife is suddenly inserted, to cut the string directly below point of support. How far to the right of where the s..
It's nighttime, and you've dropped your goggles into a 2.8m deep swimming pool. If you hold a laser pointer 0.90m above the edge of the pool, How far are the goggles from the edge of the pool
A 70.0 football player is gliding across very smooth ice at 2.25 . He throws a 0.470kg football straight forward. What is the player's speed afterward if the ball is thrown at 16.5 relative to the ground
Find the surface tension force on water inside a tube and height to which the water rises in the tube.
The total force on a one foot wide section of the inclined portion of the wall and the location and line of action of the resultant force.
A certain lightbulb has a tungsten filament with a resistance of 18.0 when cold and 138 when hot. Find the temperature of the hot filament
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