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A movie camera with a (single) lens of focal length 70 mm takes a picture of a person standing 29 m away. If the person is 160 cm tall, what is the height of the image in millimeters on the film?
A vertically hanging steel wire has the following properties. Length=8.75m, Cross-Sectional area= 0.375 cm cubed. Y=2.10x10^11 Pa, B=1.62x10^11 Pa, S= 0.871x10^11 Pa, Proportional Limit=3.27x10^8 Pa, breaking stress=17.4x10^8 Pa.
The height of a helicopter above the ground is given by h = 3.15t3, How long after its release does the mailbag reach the ground
The water was originally at 0°C. The specific heat of water = 1.00 kcal/kg×°C, The original temperature of the ice was:
In her bathroom, Mindy has an overhead heater that consists of a coiled wire made of nichrome that gets hot when turned on. The wire has a length of 2.2 m when it is uncoiled. What is the resistance of the heater when it is turned on
A contestant on "Survivor" is challenged to find buried treasure in a featureless desert. For how long should she run in order to retrieve the treasure
Two 500 g spheres with equal positive charges are suspended by 10.0 cm long strings in a uniform electric field E = 2.00 x 106 N/C, If the charged spheres are in equilibrium when their strings make angles of 20.0. with the vertical, determine the c..
A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 19.0 m/s. With what speed and angle of impact does the stone land
A generator connected to an RLC circuit has an rms voltage of 140 volts and an rms current of 33 mega-amps. what is the inductive reactance of the circuit
A contact lens is made of plastic with an index of refraction of 1.36. The lens has an outer radius of curvature of +1.91 cm and an inner radius of curvature of +2.41 cm. What is the focal length of lens?
Each speaker produces a tone with a frequency of 200 Hz on a day when the speed of sound is 330 m/s. The person is 1.65 m from one speaker and 4.95 m from the other. What sort of interference does the person sense.
a box rests on the ice of a frozen pond. A man applies a horizontal force of 48 N to the box causing the box to accelerate at 3 m\s^2. What is the mass of the box
An asteroid is discovered heading straight toward Earth at 13 . An international team manages to attach a giant rocket engine to the asteroid. The rocket fires for 10 , after which the asteroid is moving at 29 to its original path at a speed of 18..
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