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One day when you come into physics lab you find several plastic hemispheres floating like boats in a tank of fresh water. Each lab group is challenged to determine the heaviest rock that can be placed in the bottom of a plastic boat without sinking it. You get one try. Sinking the boat gets you no points, and the maximum number of points goes to the group that can place the heaviest rock without sinking. You begin by measuring one of the hemispheres, finding that it has a mass of 20g and a diameter of 9.0cm.
What is the mass of the heaviest rock that, in perfectly still water, won't sink the plastic boat?
Two objects each have a positive charge. The total charge on both objects is 390 µC. When the objects are placed a distance of 1.20 m apart, each exerts an electrostatic force of 21.3 N on the other. What is the charge on each object? (Round the a..
After that, specify which muscles are pulling on which bones and what type of joints is involved in lifting the glass. (Part two) at last, trace the path of the water from the mouth to the urethra, detailing gastrointestinal and renal / urinary an..
A thin soap film (n = 1.302) suspended in air has a uniform thickness. When white light strikes the film at normal incidence, violet light (&lambdav = 412 nm) is constructively reflected. At what angle of incidence will green light (&lambdag = 562..
Two motorcycles are traveling in opposite directions at the same speed when one of the cyclists blasts his horn, what is the speed of the motorcycles
A physics professor wants to demonstrate the large size of the henry unit. On the outside of a14-cm-diameter plastic hollow tube, How many kilometers of copper wire will be required
A capacitor is discharged when a wire is connected across its terminals, How much energy is released for a 1.00 uF capacitor with 10.0 V across its plates
The voltage across an air-filled parallel-plate capacitor is mesured to be 200 v. find the dielectric constant of the inserted material
A car is towing a boat on a trailer. The driver starts from rest and accelerates to a velocity of +16.6 m/s in a time of 34.3 s, What is the tension in the hitch that connects the trailer to the car
A charge Q is transferred from an initially uncharged plastic ball to an identical ball 11cm away. The force of attraction is then 19mN. How many electrons were transferred from one ball to the othe
How much does the rocket clear the top of the wall
A pendulum has a period of 0.80s on Earth. What is its period on Mars, where an acceleration of gravity is about 0.37 that on Earth.
If the perceived frequency becomes constant at 440 Hz, what is terminal speed at the paratrooper? Take the speed sound in air to be 343 m/s and assume the paratrooper always remains below the helicopter.
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