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Kim says that she was less than 10 ft away from the president when she took a picture of him with her 45-mm focal length camera lens. The picture shows the upper half of the president's body (or 3.3 ft of his total height). On the negative of the film, this part of his body is 18 mm high. How close was Kim to the president when she took the picture? In Feet.
A lens for a 35-mm camera has a focal length given by f = 54mm, What is the magnification of the image on the film
In a head on collision, a car stops in .10 seconds from a speed of 14 meters per second. The driver has a mass of 70 kg, and is, fortunately, tightly strapped into his seat. What force is applied to driver by his seat belt during that fraction of ..
A closed cylindrical tank has a height of 0.77m. The tank is at first filled with air at a pressure of 2.00 atm. Water is pumped into the tank until the air pressure reaches 6.1 atm. The temperature is constant. Find out the height of the compress..
What is the instantaneous power, at a time of 0.00700 seconds, dissipated by a 200 ohm resistor in a resonant AC circuit powered by a generator with a 21.0 V highest potential difference operating at 5000 rad/s .
A reaction vessel contains 8.06 g of H2 and 64.0 gof O2 at a temperature of 125?C and a pressure of 125kPa. What is the volume of the vessel
The speed of an ion in a particle accelerator is doubled from 0.460c to 0.920c. The initial relativistic momentum of the ion is 5.10 x 10-17 kg·m/s. calculate the final relativistic momentum of the ion
A roller coaster travels 98.9ft at an angle of 42.9 above the horizontal. How far does it move vertically
A U-shaped tube open to the air at both ends contains some mercury with a density of 13,600 kg/m3. Calculate the gauge pressure at the water-mercury interface
q1. how did pavlov and watsons focus on scientific inquiry of behaviours differ from earlier viewpoints of
A motorcycle has a constant speed of 28.4 m/s as it passes over the top of a hill whose radius of curvature is 159 m. Find the magnitude of the centripetal force
A 6.90-g lead bullet traveling at 420 m/s is stopped by a large tree. what is the increase in temperature of the bullet
Two figure skaters, one weighing 625N and the other 700N , How much kinetic energy is created during the skaters maneuver
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