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What is the maximum efficiency that a heat engine could have when operating between the normal boiling and freezing temperatures of water?
To start a lawn mower, you must pull on a rope wound around theperimeter of a flywheel. find the maximum angular speed reached by the flywheel
A diathermy machine, used in physiotherapy, generates electromagnetic radiation that gives the effect of "deep heat" when absorbed in tissue. what is its wavelength
Light enters a container of liquid at an angle of 42 degree to the normal; Evaluate the index of refraction of this liquid
His results are as follows: angle of incidence = 10.0 degrees, angle of refraction = 8.00 degrees; angle of incidence = 20.0 degrees, angle of refraction = 15.5 degrees. Find the percentage error for each of Ptolemy's measurements.
The centers of a 12 kg lead ball and a 100 g lead ball are separated by 10 cm. What gravitational force does each exert on the other
A series RC circuit with C = 32 μF and R = 6.8 Ω has a 24 V source in it. With the capacitor initially uncharged, an open switch in the circuit is closed. what is the voltage across the capacitor
Tension is maintained in a string. The observed wave speed is 25 m/s when the suspended mass is 3.0 kg. (a) What is the mass per unit length of the string? (b) What is the wave speed when the suspended mass is 1.7 kg?
q1. a toolbox is carried from the base of the ladder at point a. the toolbox comes to a rest on a scaffold 5.0 m above
In the line spectrum of atomic hydrogen there is a group of lines that are produced when electrons, excited to high energy levels, make transitions to the n = 3 level. Decide (a) the shortest wavelength and (b) the longest wavelength in this series.
A concave mirror forms a real image which is twice the size of the object. calculate the radius of curvature of the mirror
A small moon of a giant planet has an orbital period of 1.43 days and an orbital radius of 4.69 multiply.gif 105 km. determine the mass of the planet
A capacitor is connected across an ac generator whose frequency is 750 Hz and whose peak output voltage is 140 V. The rms current in the circuit is 3 A. What is the capacitance of the capacitor? What is the magnitude of the maximum charge on one plat..
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