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You drop a 297-g silver figure of a polar bear into the 203-g aluminum cup of a well-insulated calorimeter containing 257 g of liquid water at 21.7°C. The bear\'s initial temperature is 96.5°C. What is the final temperature of the water, cup, and bear when they reach thermal equilibrium? The specific heats of silver, aluminum, and liquid water are, respectively, 234 J/(kg·K), 910 J/(kg·K), and 4190 J/(kg·K).
A stone is thrown directly upward at 15.0 from ground level and feels no appreciable air resistance. make Use of the work-energy theorem to find how high it will be when its speed has been reduced to half of its initial value.
An atom has only two levels, a ground state with energy -25.0 eV, What wavelength photon is required for stimulated emission of an electron in the excited state
A 2.50 x 10^-6 F capacitor is charged to 754V and a 6.80 x 10^-6 F capacitor is charged to 563V, Determine the potential difference across the second capacitor
Write at least one paragraph in which you define focal length, object and image distance and magnification. Explain the difference between real and virtual images
Laser light of wavelength 509nm illuminates two identical slits, producing an interference pattern on a screen 86.5cm from the slits, Calculate the width of the slits
Three resistors, 28, 48, and 80 ?, are connected in series, and a 0.53-A current passes through them. What is the potential difference across the three resistors
Calculate the number of bright fringes per centimeter. At what two locations on x-axis (xpositive, xnegative) is the potential zero.
A 55 kg block of ice slides down a frictionless ramp that is 2.0 m long and 0.91 m high. Find the force exerted by the worker
Two point charges q1= 2.0x10^-6 C and q2= -3.0x10^-6 C, Find the electric field and the electric potential at a point on the x-axis
A worker pushes horizontally on a large crate with a force of 304 N and the crate is moved 4.4 m. How much work was done.
A 54-kg skater initially at rest throws a 3.0-kg medicine ball horizontally to the left. Determine the acceleration of the ball during the throw
A continuous line of charge lies along an x axis, extending from x = +x0 to positive infinity. The line carries charge with the uniform linear charge density λ0. What are the magnitude and direction of the electric field at the origin.
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