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An object has a weight of 4.5N in air, 3.4N in water and 3N in a salt solution. If the density of the water is 1000km m^-3, what is the density of the salt solution.
Balance the meter stick at its center of gravity and hung an unknown mass (e.g. your keys) at the 90 cm mark. Place the 200-g mass on the meter stick at a location until equilibrium is reached. Record this position. what is the advantage of having th..
A certain mixing tank has a capacity of 20 gallons and it is full of water with a small amount of bleach, Find the amount of bleach inside the tank at time t
A point charge (m = 1.0 g) at the end of an insulating string of length 53 cm (Fig. 16-66) is observed to be in equilibrium in a uniform horizontal electric field of E = 9500 N/C, when the pendulum's position is as shown in Fig. 16-66, with the charg..
if a car wheels are locked and the resulting skid marks are 150m long, how fast was the car going when the wheel became locked
q1. a skater holds her arms outstretched as she spins at 180 rpm. what is the speed of her hands if they are 150 cm
A wave on a string is described by D(x,t)=(2.00cm)sin[(12.57rad/m)x?(638rad/s)t],where x is in m and t is in s. The linear density of the string is 5.00g/m, What is the maximum speed of a point on the string
A heat engine, in each cycle, takes in 750 J of heat and exhausts 300 J of heat. what is the smallest possible high temperature for the engine cycle
A wheel rotates with an angular acceleration given by ε=4at3-3bt2, where t is time and a and b are constants. write the equations for the angular speed
A water pipe decreases in diameter from 16 cm to 8 cm. In the wider section the average velocity is 30.0cm/s. determine the volume rate in the narrow section
A point charge of 9 µC is located at x = -3.0 cm, and a second point charge of -13 µC is located at x = +4.0 cm. Where should a third charge of +6.0 µC be placed
approximately what is the mass of an object whose weight equals the force from part "b"? can you lift such a mass.
A Girl is pushing on a 45 kg dresser with 300 N of force. The dresser has a coeficient of statice friction of 0.83, How much is the force of friction on the dresser
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