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A telescope has magnification of 40 and length of 1230mm. What are the focal lengths of the eyepeice?
An object carries a charge of -6.6 µC, while another carries a charge of -2.0 µC. How many electrons must be transferred from the first to the second object
A proton, initially traveling in the +x-direction with a speed of 5.75*10^5m/s, enters a uniform electric field directed vertically upward. What is the strength of the electric field
A 1500kg weather rocket accelerates upward at 10m/s2. It explodes 1.9s after liftoff and breaks into two fragments, What was the speed of the heavier fragment just after the explosion
A mass, m= 1.23kg is hanging from a string. The string is stretched 0.641m from its natural equlibrium position. If i lift the mass 0.36m and let it go, what will be its maximum velocity
A 100 g ball on a 60 cm long string is swung in a vertical circle whose center is 200 cm above the floor. The string suddenly breaks while it is parallel to the ground and the ball is moving upward. The ball reaches a height 600 cm above the floor..
A box weighing 250-N is supported by the cable; the tension in the cable is 120-N. How much time elapses as box falls (starting from rest) 15.0 m.
You & your friend peter are putting new shingles on a roof pitched at 25 degrees. You are sitting on the very top of the roof when peter, who is at the edge of the roof directly below you, 5.1m away, asks you for the box of nails. Rather than carr..
A car accelerates uniformly from rest and covers a distance of 71 m in 5.6 s. If the diameter of a tire is 42 cm, Find total number of rotations of the wheel
A 40 ohm resistor and a 60 ohm resistor are connected in series to a 12 volt battery. What is the voltage difference across each resistor
A short blast of sound with frequency 335 Hz is created by a speaker that projects the sound equally in all directions. what was the power of the blast
The light energy that falls on a square meter of ground over the course of a typical sunny day is about 20 MJ. The average rate of electric energy consumption in one house is 1.0 kW. Find the energy consumption and area required by the solar cell
A 196-g aluminum calorimeter contains 612 g of water at 21° C. A 96-g piece of ice cooled to -21° C is placed in the calorimeter, Find the final temperature of the system, assuming no heat is transferred to or from the system
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