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A ball of mass 0.45 kg is traveling with a velocity of 1.2 m/s north, 2.4 m/s east and 0.6 m/s up. The ball is connected to a post, and the ball is 0.6 m north and 0.8 m west and 0.1 m below the point at which the rope is attached to the post. What is the angular momentum of the ball with respect to the point at which the rope is attached to the post?
In exercising, a weight lifter loses 0.124 kg of water through evaporation, find the change in the internal energy of the weight lifter
A glass bead charged to 3.8 nC exerts an 6.0Ã-10âˆ'4N repulsive electric force on a plastic bead 2.7 cm away
A 2.0kg block of wood sits on a table. A 3.0 g bullet, fired horizontally at a speed of 360m/s, find the speed of the block immediately after the bullet exits
In the semiconductor industry, an insulating layer can be built onto silicon devices by oxidizing the silicon to form silica, SiO2, Write down a balanced equation for the reaction between silica and HF.
A potter's wheel having a radius 0.450m and a moment of inertia 15 kg•m2 is rotating freely at 45 rev/min. The potter can stop the wheel in 7.50 s by pressing a wet rag against the rim and exerting a radically inward force of 68 N.
A reporter in the press box looks at an angle of 10.0 below the horizontal to see second base, find the horizontal distance from the press box to second base
The third-order fringe of 650 nm light is observed at an angle of 17° when the light falls on two narrow slits. How far apart are the slits
A stone is dropped at t = 0. A second stone, with 2 times the mass of the first, How fast is the center of mass of the two-stone system moving
Weak background noises from a room set up the fundamental standing wave in a cardboard tube length of 67.0 cm with two open ends. what fundamental frequency do you hear from the tube
charge of -2.95 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass, which has a radius of 0.097 m. The charges on the circle are -3.85 µC at the position due north and +5.20 µC at the position due ea..
A 20 cm radius air duct is used to replenish the air of a room 9.2 m multiplied by 5.5 m multiplied by 5.0 m every 10 min. How fast does air flow in the duct
A Carnot engine absorbs 4.65×103 J from the hot reservoir and expels 3.12×103 J to the cold reservoir during each engine cycle. what is the temperature of the hot reservoir
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