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220 cm3 of hot tea at 89°C are poured into a very thin paper cup with 70 g of crushed ice at 0°C. Calculate the final temperature of the "ice tea". (Hint: think about two processes: melting the ice into liquid and, maybe, warming the liquid.)
At a distance rl from point charge the magnitude of the electric field created by charge is 248 N/C. After a distance r2 from the charge, field has a magnitude of 132N/C. Find ration r2/r1.
A sample of wood from an archaeological excavation is dated by using a mass spectrometer to measure the fraction of 14C atoms. What is the wood's age
A spring of k=12.00 N/m has a block of mass 11- kg attached to it on a frictionless table. If the block is pulled a distance 0.17m to the right and released from rest, how long would it take the block to return to its equilibrium position? Give yo..
A camera is equipped with a lens with a focal length of 23 cm. how far from the film should the lens be placed
A 4.5 kg fish swimming 2 m/s swallows an absent minded 1 kg fish swimming toward it at a velocity that brings both fish to a halt at once after lunch. What is the velocity v of the smaller fish before lunch.
The magnitudes of the four displacement vectors shown in the drawing are A = 20.0 m, B = 11.0 m, C = 12.0 m, and D = 21.0 m.
On a 7.2 m length of string, you count 5 crests and 4 troughs. What is the wavelength of the waves on the string
Tim and Rick both can run at speed v_r and walk at speed v_w, with v_{rm r} > v_{rm w}. They set off together on a journey of distance D. Rick walks half of the distance and runs the other half. Tim walks half of the time and runs other half.
A 9.22 kg ball, hanging from the ceiling by the light wire 145.00 cm long, is struck in an elastic collision by a 1.20 kg ball moving horizontally at 6.46 m/s just before the collision.
A metallic sphere has a charge of +4.4 nC. A negatively charged rod has a charge of -6.0 nC. When the rod touches the sphere, 7.2 109 electrons are transferred. What are the charges of the sphere and the rod now? sphere nC rod nC
David is driving a steady 21.0 when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.70 at the instant when David passes. How far does Tina drive before passing David.
At the top a giant 360 swing on the high bar, a 50 kg gymnast has a velocity of 1 m/s and he is 3.5 m about the ground, What is the gymnast's gravitational potential energy
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