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A 74 kg man in a 6.0 kg chair tilts back so that all the weight isbalanced on two legs of the chair. Assume that each leg makescontact with the floor over a circular area with a radius of1.0 cm, and find the pressure exertedby each leg on the floor.
Pa
Calculate the period of a ball tied to a string of length 0.3 m making 6.9 revolutions every second. Answer in units of s, Calculate the speed of the ball
q1. a dockworker applies a constant horizontal force of 79.0 to a block of ice on a smooth horizontal floor. the
During each cycle, a refrigerator ejects 680 kJ of energy to a high-temperature reservoir, and takes in 600 kJ of energy from a low-temperature reservoir. Determine the work done on the refrigerant in each cycle. Determine the coefficient of performa..
A 1.4-kg playground ball is moving with a velocity of 3.0 m/s directed 30° below the horizontal just before it strikes a horizontal surface. compute the magnitude of the average resultant force on the ball
The Hamiltonian of a system of two (spin- 1/2) electrons, H= ?1?z1+?2?z2 where ?z is the Pauli Matrix, ? is an energy parameter and our subscripts represent the two electrons 1 and 2. What is the basis where this Hamiltonian is diagonal and what is t..
A ball of mas 0.250. Kg is attached to a string 0.750 m long. The ball is swung in a s pendulum-type motion such that it has a speed of 6.40 m/s, What is the corresponding tension in the string
Calculate the magnitude of the electric field at one corner of asquare 0.8 m on a side if the other three corners are occupied by3.2x10-6 C charges
A rope applies a horizontal force of 193 N to pull a crate a distance of 1.89 m across the floor. What is the work done by the frictional force
Waves travel at different velocity in different medium. How does wave velocity effect wave frequency
Show that the sun is not at rest in the center of the solar system by calculating the distance from the Sun's center to the center of mass of the Sun-Jupiter system
A 9.0 V battery and three resistors are all connected in series. What is the potential difference across the third resistor
The intensity of the sound from a certain source is measured at two points along a line from the source. The points are separated by 12.9 m, Calculate the power output of the source
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