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There are two telescopes observing at night. The first telescope is 0.3m and has a focal ratio of f/8. The second telescope has a focal ratio of f/4 and is 30m in diameter. They each have an identical CCD camera whose pixels are 25 microns on a side. How much energy will be accumulated in a single pixel in a 100s exposure?
Note: Object being observed has an apparent brightness of 1.0*10^-7 W m^-2 and has an angular diameter of 15 arcsec.
Two physical pendulums (not simple pendulums) are made from meter sticks that are suspended from the ceiling at one end. Determine the period of the metal pendulum
Prior to the music CD, stereo systems had a phonographic turntable on which vinyl disk recordings were played. calculate the total number of rotations for the complete start-up
An object thrown straight up falls back and is caught at the sameplace it is launched from. Its time of flight is T;its maximum height is H. Neglect air resistance. What is its average velocity for the second half of the trip?
Estimate the kinetic energy of the Mars with respect to the Sun as the sum of the teerms, that sue to its daily rotation about its axis
Predict the effect on concentration of SO3 as equilibrium is achieved by using Q, the reaction quotient. 2 SO3(g) 2 SO2(g) + O2(g
A cubic metal box with sides of 19 cm contains air at a pressure of 1 atm and a temperature of 253 K. Find the force due to the internal air pressure on each wall of the box
A molecule of DNA (deoxyribonucleic acid) is 2.05 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 0.88% upon becoming charged. Determine th..
A stone was thrown upward with an initial speed of 10m/s from theroof of a building and strikes the ground in 6s (no air resistance) How tall is the building? How high does the ball go in respect to the roof?
a planet has two small satellites in circular orbits around the planet. the first satellite has a period 12 hours and an orbital radius 6*10^7m. what is the orbital radius of the second satellite
a person of mass 50 kg rides in a ferris wheel of radius 20 m. the ferris wheel completes a rotation once every 10
A student on a piano stool rotates freely with an angular speed of 3.10 rev/s. The student holds a 1.40-kg mass in each outstretched arm, 0.759 m from the axis of rotation, Calculate the initial and final kinetic energy of the system
If the rms speed of the molecules of a quantity of helium at temperature 142 K is the same as the rms speed of neon atoms at a second temperature
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