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(a) A 2.20 cm high insect is 1.15 m from a 130 mm focal-length lens. What is the image distance and How high is the image.
(b) What if f = -130 mm? What is the image distance and how high is the image?
An infinitely long cylinder, radius a, carries a current I, distributed uniformly over its cross-sectional area. The axis of the cylinder coincides with the z-axis.
Two kg of propane are initially saturated liquid at 0 C. It undergoes an isentropic process that cools it to -40C. What is the volume after the cooling
A world-class sprinter accelerates to his maximum speed in 4.2s. What is his average acceleration for the entire race
What is the half-life in days of a radioactive sample with 5.2×1015 atoms and an activity of 5.1×108Bq ? What is the half life in days
an attack helicopter is equipped with a 20mm cannon tat fires 112 g shells in the foward derection with a muzzle speed
High-altitude mountain climbers do not eat snow, but always melt it first with a stove. Calculate the energy absorbed from a climber's body if he eats 0.70kg of -15?C snow which his body warms to body temperature of 37?C
An airplane pilot fell 350m after jumping from an aircraft without his parachute opening. Estimate the work done on him by air resistance as he fell
in reaching her destination a backpacker walks with an average velocity of 1.34 ms due west. this average velocity
1. A ship has a top speed of 3.0 m/s in calm water. The current of the ocean tends to push the boat at 2.0 m/s on a bearing of due South. What will be the net velocity of the ship if the captain points his ship on a bearing of 55° North of W..
A cylindrical eraser of negligible mass is dragged across a paper at a constant velocity to the right by its pencil. The coefficient of kinetic friction between eraser and paper is 0.640. The pencil pushes down with 3.80N. Determine the shear modu..
How far away from the people is the plane.
Calculate the wavelength of light in vacuum that has a frequency of 7.8 108 Hz. and What is its wavelength in carbon tetrachloride
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