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A thin spherical shell of mass 0.450 kilogram and diameter 0.230 meter is filled with alcohol (ρ = 806 kg/m3). It is then released from rest at the bottom of a pool of water. Compute the acceleration of the alcohol-filled shell as it starts to rise toward the surface of the water.
A gymnast with mass m1 = 40 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 110 kg and length L = 5 m. Each support is 1/3 of the way from each end. at first the gymnast stands at the left end of..
one mole of an ideal monoatomic gas initially at 300 k is expanded from an initial pressure of 10 atm to a final
Given two vectors A? = 4.00 i^+ 7.80 j^ and B? = 5.60 i^? 2.00 j^ , find the scalar product of the two vectors A? and B?. Find the angle between these two vectors
A concave lens has a focal length of -28 cm. Find the image distance and magnification that results when an object is placed 22 cm in front of the lens
To stop a car, first you require a certain reaction time to begin braking; then the car slows under the constant braking deceleration. What are your reaction time
When the pressure applied to an unknown liquid is increased from 1.0x10^7 N/m^2 to 5.5x10^7 N/m^2, Calculate the bulk modulus of the liquid
What is the thermal stress in a SiO2 film that is deposited at 950 C on a Si substrate after it returns to room temperature? Is it tensile or compressive?
A wave has angular frequency 135 rad/s and wavelength 1.70 m. Calculate the following values of the wave. estimate the angular wave number
suppose you wanted to be able to see small details on the moon using an optical telescope. what is the smallest
Two steel juggling balls each carry a charge of 2.75 ?C. determine the distance between the centers of the two balls
An object of size 3cm is placed 14cm in front of a concave lens of focal length 21 cm. decsribe the image formed by the lens. What happens , if the object is moved further away from the lens
Consider the circuit made of a R = 100 resistor, voltage source V , and fuse F. The fuse breaks if the instantaneous current in the circuit reaches 1 A. Which of the following voltage sources can be used in the circuit without breaking the fuse?
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