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Find the focal length (cm) of a simple magnifier which has a magnification of 5.5. Use 25 cm for the near point. Assume that the image is at infinity. Give the answer to 2 significant figures.
A gardener opens a hose and water is ejected horizontally at the speed of 6m/s. The diameter of the hose is 2cm and the density of water is 1000kg/m^3.
A tank contains mercury, whose density is 13,600 kg/m^3. Find the force exerted by the mercury on a circular plug
In reaching her destination, a backpacker walks with an average velocity of 1.37 m/s, due west. This average velocity results because she hikes for 6.44 km with an average velocity of 2.54 m/s, due west, turns around, how far east did she walk
The average value of the squared speed does not equal the square of the average speed. find the average value of the squared speed
q1. a cube of ice is taken from the freezer at -9.4degc and placed in a 94 g aluminium calorimeter filled with 315 g of
The linear coefficient of thermal expansion for concrete is 12x10^-6 ºC^-1. Consider a slab of concrete which is 4.0 m long at 0.0 ºC. What seems to be the primary safety concern in the lab
A Molecule of DNA is 2.17 um long. The ends of the molecule become strongly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 0.78% upon becoming charged. Determine the effective spring con..
What pressure is acting on the walls of drum
a car is driving at 23m/s along a road. It is at the bottom of the hill. kinetic friction equals 1.00 and the radius of the hill is 200 meters. what is the tangential acceleration of the car at the top of the hill with radius of 200 meters
A marble with a mass m of 3.00 g is released from rest in a bottle of syrup. Its terminal speed vt is 1.81 cm/s. What is the strength of the resistive force (N) when the marble reaches terminal speed
A rock is tossed straight up with a speed of 29 m/s. How long is the rock in the air, from the instant it is released until it hits the bottom of the hole
Estimation instantaneous rate of evaporation
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