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A lump of platinum is extruded through a die with diameter of 0.1 cm resulting in a cylindrical shape and a net resistance of 11 ohms across the device. This same material is then forced through a second die with diameter of 0.05 cm, what will be the new resistance across the material?c
A radio antenna broadcasts a 1.0 MHz radio wave with 29 kWof power. Assume that the radiation is emitted uniformly in all directions. (a) What is the wave's intensity 35 km from the antenna? I=___?___W/m^2 (b) What is the electric field amplitude at ..
A bob of mass m is suspended from a string of length L, forming a pendulum. The period of this pendulum is 2.6 s. what is the period of oscillation
A 9 m, 260-N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.5, and the ladder makes a 50° angle with the ground. How far up the ladder can an 800-N person climb before the ladd..
Coherent light from a sodium-vapor lamp is passed through a filter that blocks everything except for light of a single wavelength. find the wavelength of the light that falls on the slits
Consider n moles of an ideal monatomic gas placed in a vertical cylinder. The top of the cylinder is closed by a piston of mass M and cross-section A. Initially the piston is fixed, and the gas has temperature T0 and volume V0.
An outboard motor for a boat is cooled by lake water at 14.7°C and has a compression ratio of 14.9. Assume that the air is a diatomic gas. Calculate the efficiency of the engine's Otto cycle
A resting bat sends out ultrasonic waves at 50 kHz towards an insect that is approaching the bat with a speed of 20.0 m/s. What is the frequency of waves heard by the insect
A 5.00-N salmon swims 20.0m upstream against a current thatprovides a resistance of 1.50N. What is the total work that mustbe done by the salmon
An infinitely long conducting cylinder of radius a carries a change qi per unit length. If ρ is the perpendicular distance from the axis of the cylinder. Find the scalar potential φ everywhere.
A tank contains 11.6 g of chlorine gas (Cl2) at a temperature of 81 °C and an absolute pressure of 5.02 105 Pa. The mass per mole of Cl2 is 70.9 g/mol. How many grams of chlorine gas have leaked out of the tank
A metal rod 32 cm long moves in a plane perpendicular to a magnetic field of 200 G. Find the speed of the rod if the potential difference between the ends is 6 V
A hard steel ball is dropped from rest at postion y = 2h and bounces from a hard surface tilted at an angle phi from horizontal. On impact, Find the horizontal displacment of the ball
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