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The acceleration of a particle is defined by the relation a =-k√v where k is a constant the particle starts at time t = 0sand the postion s = 0 m with a velocity of 25 m/s. Afterwards, when s = 6 m the particle veloicty is v = 12 m/sdetermine:
1. the veloicty v of the particle when it reaches s = 8 m
2. the time required for the particle to come to rest.
A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 33.5 dB. What is the intensity delivered to the eardrum
a conducting sheet carries a surface current density of k amperesmeter. there are no other currents in the vicinity.a-
A diving borad 3.00 m long is supported at a point 1.00 m fromthe end, and a diver weighing 500 N stands at the free end. Find the force at the end that is beng held down
Consider a simple model for the interior of the Earth: there is a spherical iron core with constant mass density ?0 and radius a; outside the core is "rock" with constant density ?1. Calculate the radius a of the iron core
Two balls of radius 2.00 mm have a separation between theircenters of 5.33 cm. The same electric charge is placed on bothballs so that there is a repulsive force between them of2.65 N. Assume that the charge is uniformlydistributed over each ball.
the pupil of an eagles eye has a diameter of 6.0 mm. two field mice are separated by 0.010 m. from a distance of 161 m
A 768 kg car moving at 27 m/s brakes to a stop. The brakes contain about 16 kg of iron that absorb the energy. What is increase in temperature of the brakes
The electric potential at a position located a distance of 19.5 mm from a positive point charge of 8.10x10-9C and 10.3 mm from a second point charge is 1.30kV
A power plant having a carnot efficiency produces 1000 MW electric power from turbines that take in steam at 500K, Determine the flow rate of the river
an ice cube tray is filled with 75.0 g of water. after the filled tray reaches an equilibrium temperature of 20.0
A step-down transformer is used for recharging the batteries of portable devices. The turns ratio N2/N1 for a particular transformer used in a CD player is 7:72. find rms output voltage of the transformer
a 3.00 m diameter university communications satellite dish receives tv signals that have a maximum electric field
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