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A stargazer has an astronomical telescope by an objective whose focal length is 180cm and an eyepiece whose focal length is1.20cm. He wants to increase the angular magnification of a galaxy under view with replacing the telescope's eyepiece. Once the eye piece is replaced, the barrel of the telescope should be adjusted to bring the galaxy back into focus. If the barrel can only be shortened by0.50cm from its current length, what is the best angular magnification the stargazer will be able to achieve?
If the final angles are measured to have the values ?=10° and f= 8°, calculate the final speeds for the two pucks
A friend of yours who starts out at the same age as you travels to the alpha centauri solar system which is 4.70 light-years away. How fast did she travel
An underwater diver sees the sun 46 degrees above horizontal. How high is the sun above the horizon to a fisherman
Suppose that you wish to fabricate a uniform wire out of 0.950 g of copper. Assume the wire has a resistance R = 0.600 ?, and all of the copper is used. What will be the length of the wire
The resistor is connected in series with total set of lightbulbs. What is the value of the resistance? What is the power loss in the resistor.
A tennis ball of mass 57 g travels with velocity m/s toward a wall. After bouncing off the wall, What is the change in the momentum of the tennis ball
A candle with a flame 2.2 cm tall is placed 5.4 cm from the front of a concave mirror. How tall is the image of the flame
You are on an airplane traveling 30 ° south of due west at 100 m/s with respect to the air. What is the heading of the plane with respect to the ground
A horizontal force of 200 N is applied to a 55-kg cart across a 10-m level surface. If the cart accelerates at m/s^2, then what is the work done by the force of friction
A speeder is racing down the road at a constant speed of 90mi/h. A police officer is having coffee while the speeder zips past her. How Far down the road does the officer catch the speeder
Use Kirchhoff's laws to set up three simultaneous equations that can be solved for the value of each of the currents in Figure 3 in terms of the power supply voltages and the resistor values. Use the measured resistor and power supply voltage values ..
An electron is accelerated from rest through a potential difference that has a magnitude of1.65 107 V. what is the relativistic kinetic energy (in joules) of the electron
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