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A piece of iron is heated with a torch to a temperature of 848 K. How much more energy does it emit as blackbody radiation at 848 K than it does at room temperature, 295 K?
A pendulum of length 50cm is pulled 30 cm away from vertical axis and free from rest. What would be its speed at the bottom of its swing.
during heavy rain a section of a mountainside measuring 5.4 km horizontally perpendicular to the slope 0.40 km up along
At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 1.8 m/s2. How fast will the automobile be traveling at that instant
A 230 g baseball is pitched at 34 m/s spinning at 41 rad/s . You can treat the baseball as a uniform solid sphere of radius 4.5 cm What fraction of its kinetic energy is rotational?
Two metal spheres, each of mass 14 g and initially at rest, are dropped from a height of 6 m in an evacuated chamber. One sphere has a charge of +50 ?C, and the other has a charge -50 C.
How would you orient a loop antenna in order to obtain maximum signal from an inci- dent electromagnetic wave which has its magnetic field linearly polarized in the north-south direction?
A horizontal tube with length L has two positive charges +Q1 and +Q2 on the edges. A small ball can move without friction inside the tube (see figure). This small ball has a charge +Q and the same diameter as the tube. Find the static equilibrium ..
a rectangular coil with resistance r has n turns each of length l and width w. the coil moves into a uniform magnetic
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 sinkin..
In a Young's double-slit experiment, two rays of monochromaticlight emerge from the slits and meet at a point on a distantscreen.What is the wavelength (in nm) of the monochromatic light
A 2600 kg automobile is traveling at 20 m/s when the brakes are applied. The braking force is 10192 N. Use work-energy methods for this problem. Determine the initial kinetic energy of the automobile
if 400 kcal is added to a gas that expands and does 1000 kj of work what is the change in the internal energy of the
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