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A certain telescope forms an image of part of a cluster of stars on a square silicon charge-coupled detector (CCD) chip 2.00 cm on each side. A star field is focused on the CCD when it is first turned on and its temperature is 20.0°C. The star field contains 5 342 stars scattered uniformly. To make the detector more sensitive, it is cooled to -100°C. How many star images then fit onto the chip? The average coefficient of linear expansion of silicon is 4.68×10 -6 (°C) -1.
The speed of light in polythene is 1.99 x 108 m/s. What is the index of refraction of polythene
Two block each of 3.0 kg are held by strings. The upper string exerts a force F of 100 Newtons. find the force exerted by the lower string on the lower block
A thin, uniform rod has length L and mass M . Calculate the magnitude of the gravitational force the rod exerts on a particle with mass m
A 57-kg pole vaulter running at 1.1 m/s vaults over the bar. Her speed while she is above the bar is 1.0 m/s. Avoid air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar.
What is the final temperature of the water and zinc.
Nik is walking a tightrope across Niagara Falls. The tightrope spans 460m. Find the tension in the tightrope while he is standing at this point
A bicycle wheel of radius 25 cm rolls a distance of 3.0 km. How many revolutions does the wheel make during this journey
What is the total force on the side of a cubic pool of water whose depth is 3.20 meters
An ideal gas is brought through an isothermal compression process. what are the temperature of the gas and the final pressur
A pump is required to lift a mass of 780kg of water per minute from a well of depth 13.7m and eject it with a speed of 17.9m/s, What must be the power output of the pump
A string is 41.0 cm long and has a mass of 3.00 g. A wave travels at 4.20 m/s along this string. what is the speed of a wave along the second string
An astronomical telescope for hobbyists has an angular magnification of -150. The eyepiece has a focal length of 4.90 mm, About how long is the telescope
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