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A 2.0 kg and a 1.0 kg ball are connente by a rigid massles rod whose length is 1 m. It is spinning ccw at 20 rpm. What torque will bring the balls to a stop in 5 s. The answer is .28 N*m in the ccw direction. How do I find this?
question1a bank robber travelling at 75 mihr in an escape car suddenly sees a barricade 150 meters ahead. the robber
A magnetic field is oriented at an angle of 39o to the normal of a rectangular area 6.5cm by 6.0cm .If the magnetic flux through this surface. What is the strength of the magnetic field.
Point charges of 23.0 µC and 43.0 µC are placed 0.500 m apart. (a) At what point along the line connecting them is the electric field zero? m (from the smaller charge) (b) What is the magnitude and direction of the electric field halfway among them? ..
A 55g ball of clay traveling at speed v 0 hits and sticks to a 1.3kg kg block sitting at rest on a frictionless surface, What percentage of the ball's initial energy is "lost"
The density of ice is 917 kg/m3, and the density of seawater is 1025 kg/m3. Determine the weight of the heaviest bear that the ice can support without sinking completely beneath the water
If a heat engine absorbs 940.0 J of heat from the hot reservoir and exhausts 330.0 J of heat to the cold reservoir, what was the work done by the engine
A nebula ‘a region of the galaxy where new stars are forming contains a extremely tenuous gas with 133atoms/cm3. This gas is heated to 7131 K with ultraviolet radiation from nearby stars. What is the gas pressure?
An organ pipe is open at both ends. The frequency of the fourth harmonic is 316 Hz higher than the frequency of the third harmonic. what is the length of the organ pipe
Two identical point charges (q = +1.40 x 10-6 C) are fixed at opposite corners of a square whose sides have a length of 0.330 m. Determine the speed of the test charge when it reaches the center of the square
A transformer connected to a 120 V ac line needs to supply 12,500 Vac to power an immense neon sign used as a business advertisement. What is the ration of secondary to primary turns of the transformer needed in order to make the sing light-up?
The cable of a hoist has a cross-section of 80 mm2. The hoist is used to lift a crate weighing 500 kg. How much will it extend if it is made of steel
A block of wood floats on water. 80% of the wood is submerged in water. Now a layer of oil is carefully poured on top of the water to a depth that more than covers the block. what is the density of the oil
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