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Find the minimum aperture diameter of a camera that can resolve detail on the ground the size of a person (1.5m ) from an SR-71 Blackbird airplane flying at an altitude of 26km . (Assume light with a wavelength of 470nm .)
Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, by rotational inertia 4.31 kg·m2 about its central axis, is set spinning c..
a 0.50 t magnetic field is perpendicular to a circular loop of wire with 53 turns and a radius of 15 cm. if the
A violin is tuned by adjusting the tension in the strings. OnBrian’s violin, the “A” string is tuned to aslightly lower frequency than Andrew’s, which is correctly tuned to 440.0 Hz.
q1. the springs of a 1600 kg car compress 5.0 mm when its 65 kg driver gets into the drivers seat. if the car goes over
A 3.00-g copper penny at 25.0 C drops 50.0 m to the ground. (a) If 60 percent of the initial potential energy of the coin earth system goes increasing internal energy of the coin determine the coin's final temperature (b) does the result depends on m..
Electrons which were initially at rest were subjected to a continuous force of 2×10-12 newton along the entire length of two miles (one mile is 1.6 kilometers) and reached speeds very near the speed of light.
A civil engineer is asked to design a curved section of roadway that meets the following conditions: With ice on the road, when the coefficient of static friction between the road and rubber is 0.11, a car at rest must not slide into the ditch and..
The frequency of light reaching Earth from a particular galaxy is 25.0% lower than the frequency the light had when it was emitted. What is the speed of this galaxy relative to the Earth?
express what would be the frequency of vibrations.
Consider the circuit in the figure, with the current directions defined as shown. Calculate the current I2 in amps. Calculate the current I3 in amps. Calculate the current I1 in amps.
a river 8 km wide has a current with a speed of 3 kmhr. how much longer will it take a boat with a speed of 5 kmhr to
A disk released from the top of an inclined plane has a speed of 6.32 m/s at the bottom. How high is the upper end of the inclined plane
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