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An engine that operates at the maximum efficiency possibletakes in 1.0 MJ of heat at 327o C and exhausts waste at127o C. How much work does it perform?
In a photoelectric effect experiment, no current flows unless thewavelength is less than 570nm. What is the work function of themetal?
While on vacation a tourist left the center of town in a rented car having an odometer reading of 26725.10 km. He traveled south of west of 6.00 h and then swung northeast for 14.0 h, ending up 420 km due east of the center of town. At that point ..
The average lifetime of a pi meson in its own frame of reference (i.e., the proper lifetime) is 2.6 10-8 s. What is the average distance it travels before decaying
A radio station with a power of 20 kW sends out an omnidirectional wave at 1.25 MHz. If the electromagnetic wave has an electric field of 0.22 V/m, what is the magnetic field amplitude
A virtual image is formed 21.0 cm from a concave mirror having a radius of curvature of 34.5 cm. What is the magnification of the mirror
A 86.6-kg sprinter exerts a force of 100 N on the starting block at an angle of 30 with respect to the ground. The horizontal acceleration of the sprinter is
You are to design a tungsten filament light bulb that has a power of 60W when it is connected to 120V at which condition its temperature is expected to be 1020C. Calculate the length of filament that you need
A bungee cord is stretched between two poles with a force of 407 N. What is the velocity of a wave on this bungee cord
A 1000-turn loop (radius = 0.045 m) of wire is connected to a 50.0 ohm resistor, What is the current flowing through the 50.0 ohm resistor
A 180.0- g copper block at 90.0 oC is dropped into an aluminum calorimeter cup initially at 22.0 oC. What is the final temperature of the system
An iron boiler of mass 222 kg contains 860 kg of water at 20°C. A heater supplies energy at the rate of 52900 kJ/h. How long does it take for the water to reach the boiling point
Every year, there is a foot race to the top of the Empire State Building. what was his average power output during the race
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