Astronomical telescope having a objective lens
An astronomical telescope has an objective lens with a focal length of 102 cm and an eyepiece with a focal length of 18cm. When used to view and object that is far far away, such as a star, what is its angular magnification?
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A typical wall outlet voltage is 120 volts in the United States. Personal MP3 players require much smaller voltages, typically 86.86 mV. If the number of turns in the primary coil is 6908, calculate the number of turns on the secondary coil of the
Five thousand joules of heat is put into a Carnot engine whose hot and cold reservoirs have temperatures of 490 and 270 K, respectively. How much heat is converted into work?
First show all forces and reaction at the instant of jumping, and second will show the situation when the skydiver reaches terminal velocity. IF you can't draw a person then approximate them as a sphere.
A 8 kg brick moves along an x axis. Its acceleration as a function of its position is shown below. What is the net work performed on the brick by the force causing the acceleration as the brick moves from x = 0 to x = 8.0 m?
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Three charged particles with q1= -50 nanocoulomb, q2= +50 nanocoulomb, q3= +30 nanocoulomb are placed in a triangle. q1 and q2 are 10 cm apart horizontally and q3 is exactly between the two charges. q3 is 5cm below both q1 and q2. What is the net
In order to improve sharpness of pictures, photographers sometimes decrease lens's aperture (i.e. cover part of the lens). Explain why this procedure leads to a sharper image.
A solid uniform spherical marble with mass 1kg and r= .02m rolls down a hill starting from rest. The hill is 1m high and has a hypotenuse of 2m. a. gravitational potential energy of the marble at the top of the hill?
To measure the height of a tree, you throw a rock directly upward, with a speed just fast enough that the rock brushes against the uppermost leaves and then falls back to the ground. If the rock is in the air for 2.8 s, how tall is the tree?
A charge of 7.65mC is placed at each corner of a square 0.230m on a side. Determine the magnitude of the force on each charge. Determine the direction of the force on each charge.
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