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a 70 kg diver steps off a 10 m tower and drops straight downinto the water. If he comes to rest 5 m below the surface of the water, determine the average resistance force exerted by the water on the diver.
A disk of radius 2.3 cm has a surface charge density of 6.2 µC/m2 on its upper face. What is the magnitude of the electric field produced by the disk
An initially uncharged 3.87-?F capacitor and a 6.99-k? resistor are connected in series to a 1.50-V battery that has negligible internal resistance. What is the initial current in the circuit, expressed in milliamperes?
At a recent rock concert, a dB meter registered 114 dB when placed 1.30 m in front of a loudspeaker on the stage, What was the power output of the speaker
How many moles of gas are in a balloon with a volume of 5.07 liters at a temperature of 298 K and a pressure of 1.11 atm
You have a ball on a wire that is twirled in a circular orbit with a radius of 3.3 m, What is the speed of the ball in orbit
two parrel,very long straight wires separated by 10 cm are carrying 2.0 A and 4.0 A in opposite direction. where the magnetic field is Zero
For the circuit shown below, C = 0.113 µF and = 103 V. The switch throw is rotated to contact b after having been at contact for the long time, and 3.47s later the potential difference across the capacitor is equal to 1/2. What is the value of R.
A 74 kg man in a 6.0 kg chair tilts back so that all the weight isbalanced on two legs of the chair. find the pressure exerted by each leg on the floor
Ignoring the container and the equilibrium vapor pressure of the liquid at 51.5 °C, find out the ratio of the mass of steam to the mass of ice. The specific heat capacity of steam is 2020 J/(kg C°).
An aluminum block slides along a horizontal surface. The block has an initial speed of 9.4 m/s and an initial temperature of 9.1degrees C. what is the final temperature of the block
You have a lens with a focal length of 35 cm. You need to combine this lens with another, What focal length should you choose for the second lens
q1. a 1000 rm kg wrecking ball hangs from a 15 rm m-long cable. the ball is pulled back until the cable makes an angle
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