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To make ice, a freezer that is a reverse Carnot engine extracts 45 kJ as heat at -14°C during each cycle, with coefficient of performance 6.3. The room temperature is 26.9°C. How much (a) energy per cycle is delivered as heat to the room and (b) work per cycle is required to run the freezer? Give your answers in kJ.
A typical adult human lung contains about 270 million tiny cavities called alveoli. Estimate theaverage diameter of a single alveolus. Assume the alveoli arespherical and a typical human lung is about 2.05 liters.
The camera is 4.50 m in front of the mirror. What is the distance between the camera and the apparent position of the bird's image in the mirror
The plates of a parallel-plate capacitor have a separation of 3.56 mm , and each has an area of 14.0cm^2. what is the magnitude of the electric field between the plates
A horse draws a sled horizontally across a snow-covered field. The coefficient of friction between the sled and the snow is 0.175, and the mass of the sled, what is the power needed to accomplish this
A car is driven east for a distance of 48km, then north for 32 km, and then in adirection 31°east of north for 25 km. Draw the vectordiagram and determine the total displacement of the car from itsstarting point.
In a Young's double slit experiment, if the separation between the two slits is 0.050mm, find the spacing between the first order and second order bright fringes for light with wavelength of 600nm
Suppose you pour water into a container until it reaches a depth of 12 cm, What is the pressure at the bottom of the container
Monochromatic light (640 nm) strikes a pair of slits at normal incidence, forming the double-slit interference pattern on a screen located 1.82m from the slits. It shows the interference pattern observed on the screen. What is the slit separation.
a physics professor did daredevil stunts in his spare time. his last stunt was an attempt to jump across a river on a
A simple harmonic oscillator consists of a block of mass 2.00 kg attached to a spring of spring constant 110 N/m. What is the amplitude of the oscillations
A woman throws a ball at a vertical wall d = 3.0 m away. The ball is h = 1.5 m above ground when it leaves the woman's hand with an initial velocity of 12 m/s at 45°.
A pressure wave in air is described by the following equation: P(x,t) = A sin(2(pi)t/T - 2(pi)x/lambda), Determine the speed of the pressure wave
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