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A reflecting telescope has a main mirror with fM = 540 mm. If an eyepiece with a magnification of 5 is used, what is the total magnification of the telescope? Assume the near-point distance of the eye is 25 cM.
The mass of a robot is 3780 kg. This robot weighs 3540 N more on planet A than it does on planet B. What is the difference MA - MB in the masses of these planets
A heating element in a stove is designed to dissipate 3200 W of heat when it is connected to 245 V. Assuming that the resistance is constant, calculate the current in this element if it is connected to 115 V.
Copper has 8.5×1028 electrons per cubic meter. How many electrons are there in a 25.0 cm length of 12-gauge copper wire, what is the average drift speed of the electrons along the wire
After the box starts sliding, the person continues to push it, exerting the same force. What is the acceleration of the box
A simple camera telephoto lens consists of two lenses. The objective lens has a focal length f1 = +44.0 cm. How far behind the concave lens should the film be placed
An 875.0-kg compact car speeds up from 22.0 m/s to 44.0 m/s while passing another car. How much work is done on the car to increase its speed
A 2.30-kg object is attached to a spring and placed on frictionless, horizontal surface. Find the maximum acceleration of the object
A square coil, enclosing an area with sides 2.7 cm long, is wrapped with 2,461 turns of wire. What average voltage is induced in the coil
how much heat transfer is req to raise the temp of a 0.750 kg al pot containing 2.50 kg of water from 30C to the boiling point and then boil away 0.750kg of water
A hungry 161-kg lion running northward at 75.5 km/hr attacks and holds onto a 35.9-kg Thomson\'s gazelle running eastward at 61.4 km/hr. Find the final speed of the lion-gazelle system
A partly-full paint can has 0.82 U.S. gallons of paint left in it. What is the volume of the paint
An astroid of mass 2.1 x 10^15 kg splits apart. Asume the original astroid was at rest, what is the final velocity of the larger piece after the break, what was the intioal momentum of the system
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