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A thin lens made with crown glass ( n=1.55) has a focal length of 10.0 cm. An identical lens with flint glass (n=1.65) was made. What would be the focal lens of flint glass lens?
The driver of a car slams on the brakes when he sees a tree blocking the road. With what speed does the car then strike the tree
A 100-g meter stick is hung horizontally by two vertical strings, one at the 10-cm mark and the other at the 70-cm mark. Find the tension in each of the strings.
1 the manufacturer of the roto-dyne wheel reports that the mass of the wheels rotating components is 1.41- 0.05 kg.
A 0.700 kg ball is on the end of a rope that is 1.30m in length.The ball and rope are attached to a pole and the entire apparatus,including the pole, rotates about the pole’s symmetry axis.The rope makes an angle of 70.0 degrees with respect to theve..
a tiny sphere of mass 7.30 microg and charge 2.80 nc is initially at a distance of 1.74 microm from a fixed charge of
A worker drags a box along a frictionless horizontal floor by pulling on a rope attached to the box. The position of the box is given by x(t) = (1.500 m) + (3.650 m/s)t ? (0.300 m/s 2 )t 2 + (0.089 m/s 3 )t 3 . The box has a mass of 50.00 kg.
question a gass has 100 j of energy in the form of heat is transfered to a system and the system does 150 j of work
Ball bearings are made by letting spherical drops of molten metal fall inside a talll tower-called a shot tower- and solidify as they fall. What is the bearing's impact velocity
An electric motor rotating a workshop grinding wheel at a rate of 9.80x10^1 rev/min is switched off. how long does it take for the grinding wheel to stop
A person travels by car from one city to another with dissimilar constant speeds between pairs of cities. She drives for 30mins at 80 km/h, 12 min at 100 km/h, and 45 min at 40 km/h and spends 15 min eating lunch and buying gas.
In a particular Millikan oil-drop apparatus, the plates are 2.25cm apart. What strength of electric field is needed to hold such a drop stationary against gravity if the drop contains five excess electrons
On a workday, the average decibel level of a busy street is79dB with 100 cars passing a given point every minute. what is the decibel level of the street
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