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Solve the following problem:
Problem: A lens made of fused quartz (n = 1.46) has a focal length of +39cm when it is in air.
Part A- What is the focal length when it is in oil?
Rework your solution from the beginning and check each step carefully.
A winch capable of pulling 250 lb must pull a 2800 lb load up a ramp of height 5.5 ft. Find the length of the shortest ramp for this job
The efficiency of a 1089 MW nuclear power plant is 17.7 percent. If a river of flow rate 1.23 x 106 kg/s were used to transport the excess thermal energy away, find the average temperature increase of the river
The spring shown in the figure is compressed 50 cm and used to launch a 100 kg physics student. How far up the incline does the student go
One hundred turns of (insulated) copper wire are wrapped around a wooden cylindrical core of cross-sectional area 1.20 × 10?3 m2. how much charge flows through a point in the circuit during the change
a man drives a car at a speed of 20 m/s off 30 m high cliff. the road leading to the cliff is inclined upward at angle of 20 degrees. how far from the base of the cliff the car land
the parallel-plate capacitor used on each key of a computer keypad is a square 0.5 cm on a side. between the plates is
The electric starter in an automobile equipped with a 12 V battery draws a current of 90.00 A when in operation. What amount of electric energy has been withdrawn from the battery
This one is challenging: A thin uniform pole of length 30 m is pivoted at the bottom end. Calculate the most probable point of rupture on the pole as the pole falls
An electric heater is used to heat a room of volume 62m3 . Air is brought into the room at 50 and its completely replaced twice perhour. Heat loss through the walls amounts to approximately 850kcal/h. If the air is to be maintained at 20o C, what mi..
A neon atom (m=20.0 u) makes a perfectly elastic collision with another atom at rest. Find what is the mass (in u) of the unknown atom
Biological muscle cells can be thought of as nanomotors that use the chemical energy of ATP to produce mechanical work. How much work is done by such proteins
A portion of audio equipment is said to have a signal-to-noise ratio of 58 dB. Determine the ratio of intensities of the signal and the background noise
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