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A helicopter, starting at rest, accelerates straight upfrom the roof of a hospital. The lifting forces does work inraising the helicopter. An 810-kg helicopter rises from rest to aspeed of 7.0 m/s in a time of 3.5s. During this time it climbs to aheight of 8.2m. What is the average power generated by the lifting force?
A Young’s double slit system consists of slit spacing, d=1mm, and slit width, a=0.8µm. What is the intensity of the light relative to the central maximum at an angle of 15o from the central axis for 600nm light? [10 points.] (Please state whether you..
a 640 g hollow ball 28 cm in diameter is suspended by a wire and is undergoing torsional oscillations at a frequency of
A fan blade is revolving at 20 cycles/s when someone turns off the fan. How long will it take for the fan blade to come to rest
antireflection coatings can be used on the inner surfaces of eyeglasses to reduce the reflection of stray light into
find the period of this oscillation.
the sun can be treated as a spherical blackbody with a radius rsun 6.96 x 108 m and a surface temperature of tsun
A simple harmonic oscillator takes 12.0 s to undergo six complete vibrations.
The red line of the Balmer series in hydrogen (? = 656.3 nm) is observed to split into three different spectral lines with ?? = 0.07 nm between two adjacent lines when placed in a magnetic field B. What is the value of B if ?? is due to the energy sp..
On a cloudless day, the sunlight that reaches the surface of the earth has an intensity of about 1.5 × 103 W/m2. What is the electromagnetic energy contained in 5.0 m3 of space
A jet of water squirts out horizontally from a hole near the bottom of the tank, Assume that x = 1.22 m and y = 1.55 m. What is the speed of the water coming out of the hole
A block of mass 0.243 kg is placed on top of a light, vertical spring of force constant 4 825 N/m, To what maximum height above the point of release does it rise
Find out the critical angle theta_ce for e-waves in calcite. The index of refraction for light with electric field parallel to the optical axis (called extraordinary waves or e-waves) is 1.4864. The index of refraction for light with electric fiel..
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