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Two objects are identical and small enough that their sizes can be ignored relative to the distance between them, which is 0.278 m. In a vacuum, each object carries a different charge, and they attract each other with a force of 1.62 N. The objects are brought into contact, so the net charge is shared equally, and then they are returned to their initial positions. Now it is found that the objects repel one another with a force whose magnitude is equal to that of the initial attractive force. What is the initial charge on each object, the answer to part (a) being the one with the greater (and positive) value?
a 54 newton horizontal force pushes a 5.0 kg mass sitting on a horizontal surface. Additionally , the horizontal surface exerts a 30 newton frictional force on the mass. What is the acceleration of the mass?
- An isolated macroscopic system at temperature 300K absorbs a photon from the visible part of spectrum (say Wavelength=500nm) obtain a value for the relative increase ∆w/w in The number of accessible states of the system ?
Estimate how much pressure you exert on the ground when standing up. Carefully account for the measurement data that you use when solving the problem
Heat flows through a wooden board 30mm thick at 0.0086 W/cm² when one of it's sides is 20°C warmer than the other. Determine the thermal conductivity of the wood.
#340153 on Dec 2023