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A particular species of copepod, a small marine crustacean, emits a flash of light consisting of 1.4x1010 photons at a wavelength of 490 nm. The flash lasts for 2.4 s. What is the power of the flash?
The position of a particle of mass m = 2kg is given by r=i(3t2-4t)+j(t3-8t2+10). Find the magnitude and direction of the force acting on the particle
Assume that in the course of a measurement the bridge is balanced and then the power supply voltage changes by 10% what will happen to the balance of the bridge? Describe.
a massless pan hangs from a spring that is suspended from the ceiling. when empty the pan is 52 cm below the ceiling.
She finds that the distance along the slant of the roof is 11 feet 2 in, and the distance across the front of the shed is 14 ft and 4 in. She estimates the pitch of the roof is about 30 degrees. How many gallons of water will the roof collect for ..
The temperature of a monatomic ideal gas with a mass per mole of 0.00750 kg/mol is 298 K. What is the mass of the gas
A 6kg mass attached to a spring is displaced 5.5cm on a horizontal frictionless surface. If the spring constant is 75N/m, what is the angular frequency of the oscillation?
A giant wheel, 40 meter in diameter, is fitted with a cage and platform on which a man can stand. Evaluate what is the speed of the man
In a heart pacemaker, a pulse is delivered to the heart 81 times per minute. The capacitor that controls this pulsing rate discharges through a resistance of 1.8 x 106. One pulse is delivered every time the fully charged capacitor loses 60.5% of its ..
Assume a convex mirror has a radius of curvature of 13.5 m and that there is a car that is 10.8 m behind the mirror. For a flat mirror, the image distance would be -10.8 m and the magnification would be 1. Find the image distance and magnification..
Determine the forces exerted at B and C knowing that these forces and the couple are equivalent to a force-couple system at A consisting of the force R = (3.9 lb)i + Ry j -(1.1 lb)k and the couple MR/A = Mxi + (1.5 lb ft)j - (1.1 lb ft).k
At the start of a race, a four-man bobsled team pushes their sled as fast as they can along a 50 m flat starting stretch. find the speed of the sled right before the team jumps on the sled
a circuit consists of an ideal ac generator a 20nbspmicrof capacitor and an 90?nbspresistor all connected in series.
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