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A bar with cross-sectional area A = 0.5cm2 is used to conduct heat between two regions at different temperature. The bar is made of silver, k = 417 W/(m·K). The figure below shows the rate of heat flow as the temperature difference between these two regions is increased. Find the length of the silver bar.
Two snowballs are moving directly toward each other along a vertical axis. Just before the snowballs collide, Draw a before and after picture of the collision
A sled is dragged along a horizontal path at a constant speed of 1.5 m/s by a rope that is inclined at an angle of 30.0° with respect to the horizontal, How much work is done by the rope on the sled
What is the horizontal component of velocity
A rectangular loop with sides of lengtha=1.10cm andb=4.10cm is placed near a wire that carries a currenti(t)=3.14 + 1.04t2, where the current is in amperes and time is in seconds. The distance from the straight wire to the closest side of the loop..
As part of a safety investigation, two 1200 {rm kg} cars traveling at 24 {rm m/s} are crashed into different barriers. Find the average forces exerted on (a) car that hits a line of water barrels and takes 1.80 {rm s} to stop, and (b) car that hits a..
Suppose a 65 kg person stands at the edge of a 6.5 m diameter merry-go-round turntable that is mounted on frictionless bearings and has a moment of inertia of 1850 kg m2. Calculate the angular velocity of the turntable
a laser beam is aimed at a 1.0 cm thick sheet of glass at an angle 30^{\circ} above the surface of the glass. What is the laser beam's direction of travel in the glass
Two light bulbs labeled 50 W and 100 W, find the actual power consumed by the brighter bulb
In which collision is the impulse on the cart greater. The magnitude of the charge on an electron is 1.6e-19 C
Battery-powered electricity is very expensive compared with that available from a wall receptacle. Estimate the cost per kWh of an alkaline D-cell
The rectangular gate CD shown in the figure is 1.8 m wide and 2 long. Assuming the material of the gate to be homogeneous and neglecting friction at the hinge C, determine weight of the gate necessary to keep it shut until the water level rises to..
A disk 8.00 cm in radius rotates at a constant rate of 1,200 rev/min about its central axis. Determine its angular speed in radians/sec
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