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Question: A properly exposed photograph is taken at f/11 and 1/100s. What lens opening is required if the shutter speed is 1/400s?
Explain each step for the above question.
A plane flies at a speed of 100m/s relative to still air. There is a wind blowing at 40m/s, 55 degrees to the east of north. What is the speed of the plane relative to the ground?
A hot air heating system rated at 84,000 Btu/hr has an efficiency of 65%. determine the temperature of the outlet air
A block with mass m = 16.0 kg rests on a frictionless table and is accelerated by a spring with spring constant k = 5205.0 N/m after being compressed a distance x1 = 0.481 m from the spring's unstretched length. What is the speed of the block after..
A body weighing 157 Newton is pulled over a horizontal surface with constant velocity by a constant force of magnitude 55 Newton directed 15 degree above the horizontal. Find the work done by the applied force
A spherical ball of charge has radius R and total charge Q. The electric field strength inside the ball(r?R) is E(r)=Emax(r4/R4). Find an expression for the volume charge density ?(r) inside the ball as a function of r
human hair is very good at soaking up oil spills absorbing 15 of its own weight in oil. an average human hair measures
A boy pulls due east with a force of 200 N on a box. A girl pulls due South with a force of 400 N. What is the magnitude of the net force on the box
A coil of Nichrome wire is 27.0 m long. The wire has a diameter of 0.440 mm and is at 20.0°C. If it carries a current of 0.460 A and what is the magnitude of the electric field in the wire?
What is the direction of the object's acceleration after it is free. What is the magnitude of the objects acceleration.
The rocket moves for 3.00 s along its initial line of motion with an acceleration of 32.0 m/s2. At this time, its engines fail and the rocket proceeds to move as a projectile. Find out the maximum altitude reached by the rocket.
The brightest star in the night skyis Sirius, which is at a distance of 8.30×1016 m.When we look at this star, how far back in time are we seeing it?Express your answer in years.
water drips from the nozzle of a shower onto the floor 203 cm below. the drops fall at regular equal intervals of time
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