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What is the magnitude of the electrostatic force between a singly charged sodium ion (Na+, of charge +e) and an adjacent singly charged chlorine ion (Cl-, of charge -e) in a salt crystal if their separation is 2.853 × 10-10 m?
apply the first law of thermodynamica eq 1 to a finite volume element in a stationary solid. let rt be the temperature
given the following information alternative hypothesis p lt 0.70 n 300 x 205 alpha 0.02. state your decision and
a pipe in a manufacturing plant is transporting superheated vapor at a mass flow rate of 0.3 kgs. the pipe is 10 m long
in a recent study of vietnam veterans researchers found that in a sample of 2101 veterans 777 had been divorced at
a car traveling 90 kmh strikes a tree. the front end of the car compresses and the driver comes to rest after traveling
a researcher performs a hypothesis test at the 0.05 level of significance. the null hypothesis is p 0.85and the
you toss a die and your payoff is fx 0 if x 0 x 2 otherwise. what is the optimal strategy and what is your expected
propane is contained in a closed rigid container with a volume of 10 m3. initially the pressure and temperature of the
consider a multiple regression model y beta0 beta1 x1 beta2 x2 beta3 x3 to fit these data which consist of
a voltmeter is used to read the potential difference accross the poles of a battery.the battery is rated at 20 v. the
Calculate the position that a lens should be placed in order to achieve the maximum magnification. The length between the object plane and the image plane is 50cm and are fixed ( meaning they are restricted). Only the lens can be moved. The focal ..
A block of mass 3.0 kg moves along a frictionless track which has a dip 0.7 m below the original level of the track and then a plateau 1.0 m above the original level of the track. What is the velocity at the hight point
A bullet, m kg traveling horizontally at 300 m/s hits a block of wood, mass 10kg. What was the mass of the bullet
A uniformly charged plastic disk has a radius of 0.270 m. At what distance from the center along the central perpendicular axis is the magnitude of the electric field equal to one-half the magnitude of the field at the center of the surface of the di..
a small freshman is released from rest and falls screaming 30.5 m near the surface of the earth. neglect air
A 2000kg car accelerates from 20 to 60km/h on an uphill road. Determine the work done by the engine
A 20.0-kg mass is supported by two strings as shown in Fig. 12-4. The left string is 2.00 m long and the right string is 5.00 m long. What is the tension in the right side string
A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of 79.6 m/s at ground level. The engines then fire, For what time interval is the rocket in motion above the ground
A step-down transformer has 30 turns of wire on one coil and 1200 turns on the other. what is the required rms input voltage
A long cylindrical insulating shell has an inner radius of a = 1.42 m and an outer radius of b = 1.62 m, What is the magnitude of the electric field at a distance of r= 0.59 m from the axis
you drop a stone into a deep well and hear it hit the bottom 1.60 s later. this is the time it takes for the stone to
A 5kg block is accelerated at 3 m/s^2 while fighting a frictional force of 25 N. What force needs to be applied to the block
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