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A telescope has a two ft mirror. How far apart in angle can the instrument distinguish two individual stars for blue (420 nm) light? How about for red (650 nm) light? The Very Large Array in New Mexico consists of a large number of radio telescopes arranged in a Y-pattern that is basically equivalent to a disk of 36 km in diameter. It senses radio waves in the range from 72 to 50,000 MHz. At 72 MHz, what is the minimum angular separation that it can recognize individual sources? How about for 50,000 MHz?
Two in-phase loudspeakers that emit sound with the same frequency are placed along a wall and are separated by a distance of 5.00 m. What is the frequency of the sound
A sledge loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 19.6° above the horizontal. How much work is done by the rope on the sledge
a lasik vision correction system uses a laser that emits 10 ns-long pulses of light each with 2.5 mj of energy. the
Bonnie and Clyde are sliding 270 kg bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 395N of force while Bonnie pulls forward on a rope by N of force.
A perfectly flat thin piece of glass (N=1.50) that is 6.00 cm long and and 2.0 cm wide is placed over a perfectly flat piece of black plastic (N=1.20) that is the same size. one end of the glass is slightly elevated while the other end is in contact ..
a 50.0 cm open-open tube 6.0 cm in diameter has a measured f1= 304 Hz. calculate the end correction constant from these data.
1. if the electric field exceeds about 3106 nc in air a spark occurs. approximately what is the absolute value of the
A 2kg ball traveling to the right with a speed of 4 m/s collides with a 4 kg ball traveling to the left with a speed of 2 m/s. The total momentum of the two balls after the collision is what.
The burning of fuel transfers 3. 105 W of power into the engine of a 2400-kg vehicle. determine the maximum speed the vehicle can achieve
Two identical conducting spheres, fixed in place, attract each other with a force of 0.083 N when their center to center separation is 45.00 cm. The spheres are then connected by a thin conducting wire. When the wire is removed, the spheres have a..
an ideal air conditioner operating on a carnot cycle absorbes heat q2 from a house at temperature t2 and discahrges q1
A wave on a string is described by the equation y = (4.23 mm)cos(2440t ? 0.42x) where t is measured in s and x is measured in mm. What is the frequency and wavelength of the wave
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