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An iron casting containing a number of cavities weighs 16967.7 N in air and 13045.8 N in water. What is the total volume of all the cavities in the casting? The density of iron ( that is a sample with no cavities) is 7.87 g/cm3.
A ball has a diameter of 3.90 cm and average density of 0.0845 g/cm3. What force is required to hold it completely submerged under water
An ac series circuit has an impedance of 178 ? , and the phase angle between the current and the voltage of the generator is ? = -74°, find the capacitive reactance XC or the inductive reactance XL, whichever is appropriate
After falling from rest from a height of 28 m, a 0.46 kg ball rebounds upward, reaching a height of 18 m. If the contact between ball and ground lasted 1.7 ms, illustrate what average force was exerted on the ball?
The critical angle for total internal reflection at a liquid-air interface is 45.0^\circ. what angle does the refracted ray in the air make with the normal
An electron with speed v0 =4.16×106m/s is traveling parallel to and along the same direction as an electric field of magnitude E = 7.90×103N/C, How far will the electron travel before it stops
What is the end daughter nucleus of a Th-234 nucleus that undergoes a series decay of 4 alpha decays followed bt one beta decay. Determine the energy produced in the following reaction
An initially motionless test car is accelerated uniformly to 145km/h in 8.28s before striking a simulated deer. The car is in contact with the faux fawn for .815s, after which the car is measured to be traveling at 82.0km/h. What is the magnitude ..
A 34.7 m long aluminum wire at a temperature of 24.3 oC has a radius of 0.295 mm. what is the resulting current in the wire
A man pushes on a piano with mass 180 {rm kg} so that it slides at constant velocity down a ramp that is inclined at 20.0^circ above horizontal floor. Overlook any friction acting on the piano.
A Doctor order to prepare a glass for a patient with anti-reflection coating for 400 nm and 700 nm wavelength light. Find the minimum thickness of the coating required for this job
A person on a rotating stool with arms stretched out rotates at an angular speed of 5.00 rad/s. By what factor does the moment of inertia change
Needing help, secretary of the United States Department of Agriculture asked your teacher, "If a chicken and a half can lay an egg and a half in a day and a half, how many days will it takes three chickens to lay twenty eggs".
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