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A steel rod of mass m and length L has the linear expansion coefficient X. It is standing vertically and supports a box of mass M on its top. As a result of a temperature change by an amount of deltaT, heat Q is transferred to the rod and its length changes.
a) what is the work done by the rod?
Two horizontal forces, 218 N and 157 N, are exerted in opposite directions on a crate. What is the net horizontal force on the create? Be sure to indicate the direction of the net force. (Assume that the 218 N forces are in the positive direction.)
Find the positions of the two masses at any subsequent time t (before either mass returns to the table) and describe the motion.
a popular method of distributing music used to be on disks that had a radius of about 0.3m and spun at a constant angular velocity of about pi radians per second. Find the tangential velocity at the inner and outer edges
All distant galaxies are moving away from us. Describe why this does not imply that we are at the center of universe.
A person with a near-point distance of 37 cm is able to get a usable magnification of 15 with a particular magnifying glass. What is the friend's near-point distance
Calculate the absorbed dose in Gy to the skin of a person which receives 1500 ergs/gm of beta radiation from a cloud of radioactive krypton-85 gas.
A person with mass m1 = 60 kg stands at the left end of a uniform beam with mass m2 = 91 kg and a length L = 3.2 m, What is the location of the center of mass of the system
When kicked, the ball leaves the ground with a speed of 29.0 m/s at an angle of 51° to the horizontal. Explain by how much does the ball clear or fall short of the crossbar?
A proton orbits a long charged wire, making 1.60 x 10^6 revolutions per second. The radius of the orbit is 1.40cm. What is the wire's linear charge density
Smoking causes blood vessels to constrict. If the average blood vessel radius of a smoker decreases 1.6% Calculate the needed percent increase in pressure
q1. a cart starts from rest at the top of the tilted track. assume the track is frictionless. the cart passes photo
Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to sweat, and it is determined that the heat of vaporization of its sweat is 365 cal/g.
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