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Name some recent educational innovations and evaluate their effectiveness. Do you think that schools would be more effective if they did not have comply with bureaucratic redtape? For example, if schools did not need approval to purchase the latest technology.
a research submarine has a 40cm diameter window that is 8.2cm thick. the manufacturer says the window can withstand
Two electrons in an atom are separated by 1.3 × 10?10 m, the typical size of an atom. What is the force between them
The contacts worn by a farsighted person allow her to see objects clearly that are as close as 25.0 cm, even though her uncorrected near point is 84.0 cm from her eyes, How far away is the poster actually located
A closed gas system initially has volume and temperature of 4360mL and 646.0C with the pressure unknown. what was the initial pressure in torr
two point charges -30 and 45 are separated by a distance of 15.0. what is the magnitude of the electric field at a
A mass less rope that passes over a frictionless pulley connects two blocks. The mass of the block on the left is 10kg, and it rests on a plane making an angle of 40 degrees with respect to the horizontal. The block on the right rests on a plane maki..
A force -Els applied to a 2.0kg radio -controlled model car parallel to the x-axis as it moves along a straight track. The x-component of the force varies with the x-coordinates of the car as shown in figure. Calculate the work done by the force twhe..
A 10.1-kg cannonball is fired from a 3,350 kg cannon with a velocity of 198 m/s. What is the speed of recoil of the cannon
a 16.0 g bullet is shot into a wooden block at rest with mass 4550 h on a frictionless surface. the block moves 1.20 m/s after the bullet strikes and becomes lodged in the block, find the speed of the bullet before striking the block
The coil in a 60-Hz ac generator has 125 turns, each having an area of 3.0 × 10-2 m2 and is rotated in a uniform 0.12-T magnetic field
A jet plane is flying with a constant speed along a straight line, at an angle of 35.0 ° above the horizontal. What is the magnitude of the thrust force
A 57.0 kiloton atomic bomb releases as much energy as 57.0 kilotons of TNT (1.0 kiloton of TNT releases about 5.0 x 1012 J of energy). How many grams of uranium are fissioned
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