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A magician wishes to create the illusion of a 2.49 m tall elephant. He plans to do this by forming a virtual image of a 42.0 cm tall model elephant with the help of a concave spherical mirror.
A) If the model must be placed 3.00 m from the mirror, what radius of curvature is needed? (Include the sign of each answer.)
B) How far from the mirror will the image be formed? (Enter a negative value if the image forms behind the mirror.)
A 25.0g bullet moving at 900 m/s is fired through a 0.900 kg block of wood emerging at a speed of 100 m/s. what is the resulting speed
The masses of the earth and moon are 5.98 x 1024 and 7.35 x 1022 respectively. What is the magnitude of the charge placed on each body
The efficiency of a particular car engine is 26 percent when the engine does 7.0 kJ of work per cycle. Suppose the process is reversible. Obtain the energy the engine loses per cycle as heat
An old-fashioned (vinyl) record rotates at a constant rate of 33 revolutions per minute. Evaluate what is its angular velocity
A circular loop of radius 2.58 cm contains 65 turns of tightly wound wire. what torque acts on the loop
In the persistent current experiment described in Section 10.5, let us assume that the current persisted without detectable reduction for exactly 2.5 years. Given that the inductance of the ring was approxi-mately 3.14 X 10-8 H..
Search for an academic journal (peer-reviewed) article on globalization [ e.g. global warming, international trade, human mobility(immigration), global security, global economic development, etc] and summarize it.
The upward normal force exerted by the floor is 720N on an elevator passenger who weighs 770N. What is the reaction force to weight of the passenger
Two geekie physics students with a combined mass of 133 kg jump into their old car to run out for some late night pizza. What is mass of the car
A driver in a car travelling at the speed of 78 km/h sees a cat km away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 99 m.
A lead bullet initially at 26.4oC melts just upon striking a target. calculate the speed of the bullet upon impact
A cylindrical copper rod of length 1.30 m and radius 1.60 cm is insulated to prevent heat loss through its curved surface. find the rate at which entropy increases for the rod-reservoirs system
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