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The filament of a light bulb has a temperature of 2.97 x 103 °C and radiates 60.0 W of power. The emissivity of the filament is 0.284. Find the surface area of the filament.
Starting from rest, a 12-cm-diameter compact disk takes 3.3s to reach its operating angular velocity of 2500rpm. How much torque is applied to the disk
A 5.50kg mass traveling at 3.5 m/s on a fricktionless tabled suddenly collides, What will be the maximum compression of the spring after the composite collides into it
what is the force per meter on a lightning bolt at the equator that carries 20,000 amps perpendicular to the earths's 3.00 x 10^3 T field
What speed must she have at point 3, so that the normal force at the top has the same magnitude as it did at the bottom.
Suppose the peak of a particular star's spectrum occurs at about 6000 Å (Angstrom). (a) Use Wien's law to calculate the star's surface temperature. (b) If this star were a factor of four hotter, at what wavelength would its spectrum peak? In what ..
Estimate the capacitance of the series combination of capacitors shown.
You are walking around your neighborhood and you see a child on top of a roof of a building kick a soccer ball, How tall is the building that the child is standing on
Find out the magnitude and direction of the initial velocity.
One trajectory that can be used to send spacecraft from Earth to Mars is an elliptical orbit that has Sun at one focus, its perihelion at Earth, Find the semimajor axis of the ellipse
Swift is a spacecraft that has a collecting area of 0.520 m2 to detect gamma-ray bursts (GRBs). find the amplitude of the magnetic field of the source
An ideal polarizer with its transmission axis rotated 30.5 to the vertical is placed in a beam of unpolarized light of intensity 10 W/m ^2. After passing through the polarizer, what is the intensity of the beam
The nucleus of an atom has a radius of about 5.1×10-15 m. The electron is normally at a distance of about 6.2×10-11 m from the nucleus, Find the volume of the nucleus
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