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1. When active and adaptive optics are in use, UNC's 4.1-meter diameter SOAR telescope will be able to resolve 2-micron light about as well as the 2.5-meter diameter Hubble Space Telescope, to about: A. 0.12 arcseconds B. 0.20 arcseconds C. 1 arcsecond D. 20 arcminutes E. 32 arcminutes EXAMPLE: The 2.5-meter diameter Hubble Space Telescope resolves sources of 1-micron wavelength light to about: B. 0.1 arcseconds B. q = 0.25" × (l / 1 mm) / (D / 1 m) = 0.25" × (1 mm / 1mm) / (2.5 m / 1 m) = 0.1" 2. Consider a planet that, given its albedo and distance from the sun, should have a surface temperature of 110 K, but instead has a surface temperature of 130 K because it has an internal source of heat. How much more energy is the planet emitting than receiving? A. 1.2 B. 1.4 C. 1.7 D. 2.0
A string fixed at both ends is vibrating in its 8th harmonic. How many nodes are on the string
A movig particle encounters an external electric field that decreases its kinetic energy from 9740 eV to 5690 eV as the particle moves from position A to position B. Determine the charge of the particle
A car of mass 3.0 x10^3 kg traveling at a speed of 20 m/s is passing a truck of mass 7.0x10^3 kg traveling at a speed of 10 m/s in the same direction along the same straight line
You see lightning strike a mountaintop, and 2.98 s later you hear the accompanying thunder. How far away is the mountaintop
A horse drags a 100 kg sled a distance of 4 km in 20 minutes. What is the coefficient of sliding friction between the sled and the ground
Jane is standing on the platform waiting for the train. The train approaching the platform from the north at 20 m/s blows its whistle when it is 100 m away from Jane. What frequency of sound does Jane hear
You throw a ball horizontally off a roof. the time until it lands is determined only by The height of the roof and it's initial speed
A toddler, initially standing next to his father in the front yard, walks slowly away from his dad in the direction of 30.0? N of E for 3.50 meters. How far was the distance he walked due south
You fire a gun horizontally that is 25m off the ground and the bullet goes at 200m/s. What is the time it takes for the bullet to hit ground, how far down range does bullet travel, and what is the resultant velocity (in m/s) and final angle.
A solid sphere of radius = 10 cm and mass = 2 kg is going down an inclined plane of height = 5 m. The angle of the inclined plane = 35 degrees. What is the final Total kinetic energy of the sphere
The valuable coefficient of kinetic friction
Solar cells generate a potential difference when exposed to sunlight. In an experiment, you wish to charge a rechargeable battery by connecting it in series to an array of solar cells. What is the area of the array of solar cells
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