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N bricks, each having height h and mass m, are lying on the floor in a configuration of minimal potential energy. Find the minimum energy required to put all bricks one on top of another.
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.55 10^4 m/s, and the radius of the orbit is 5.50 10^6 m. What is the orbital speed of the second satellite
A 900 line/mm diffraction grating is illuminated by light of wavelength 600 nm. How many bright fringes are seen on a paper 0.20-m-wide screen located 0.5 m behind the grating? ( Hint: assume fringe , m=0 is at the center of the paper; hence, you ..
earth-ionosphere capacitance the earth can be considered as a single-conductor capacitor see problem 24.67. it can also
The heels on a pair of women's shoes have radii of 0.5 cm at the bottom. If 30% of the weight of a woman weighing 480 N is supported by each heel, find the stress on each heel
Sam heaves a shot with weight 16-lb straight upward, giving it a constant upward acceleration from rest of 45.7 m/s^2 for a height 65.0 cm. What is the speed of the shot when he releases it
a sample with a temperature of 106.51 degrees c is dropped into an insulated cup containing water whose mass is the
Two charged pith balls are suspended on very light 10.7 cm strings. Each has a mass 11.0 g. In stability, the total angle between the strings is 37 degrees. Draw the free body diagram for one of the pith balls and clearly label all forces with magnit..
A series combination of a 11 k resistor and an unknown capacitor is connected toa 11 V battery. One secondafter the circuit is completed, the voltage across the capacitoris 8 V. Determine thecapacitance of the capacitor.
A 5.7x10^2 kg hot-air balloon takes off from rest at the surface of the earth. The wind and lift forces take the balloon up, doing +9.7 x 10^4 J of work on the balloon in the procedure. At what height above the surface of the earth does the balloo..
a typical flute is about 66 cm long. a piccolo is very similar instrument though it is similar with a length of about
An object of mass m = 5.45kg is suspended from the ceiling of an accelerating truck by a string. What is the magnitude of the tension in the string
A 0.65-g particle remains stationary when placed in a uniform electric field (on earth). What is the electric field's direction
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