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Professor Deadwood has to hold a book at arm's length (65 centimeter form his eye) to read clearly. Obtain the refractive power of glasses that will reduce that distance to a more comfortable 30 centimeter.
A 2500ml - flask is initially open to air at 24 celsius and 1 atm pressure. It's then closed and immersed in boiling water. What's the maximum pressure reached in the flask
Suppose a 20 kg ball moving at 5 m/s collides with a 100 kg ball moving at 3 m/s. How much kinetic energy was lost in the collision
when laser light of wavelenght 633.8nm passes through a diffraction grating, the first bright spot occurs at +- 18.6 degrees from the central maximum. At what angles do the third bright spots occur
A car driving at 20 m/s is approaching a stoplight. As the stoplight turns red, the driver decides that the car is going too fast to stop at the white line and hits the brakes hard. How fast was the car going when the driver changed the rate of dec..
two very large metal parallel plates that are 25cm apart oriented perpendicular to a sheet of paper are connected
A 1500 kg car is driven onto a pair of ramps so that it fronts wheels have been raised 0.3 m above the rear wheels. How much of the car's weight is supported by the rear wheels
A man stands on the roof of a 13.0 -tall building and throws a rock with a velocity of magnitude 30.0 at an angle of 42.0 above the horizontal. Calculate the horizontal distance from the base of the building to the point where the rock strikes the g..
An object of mass m1 = 4.00 kg is tied to an object of mass m2 = 3.90 kg with String 1 of length = 0.500 m. What is the tension in String 1 at this instant
a 50 w light bulb shines through two polarizers. after having passed through the first polarizer the electric field
Consider a circuit with a main wire that branches into twoother wires. If the current is 10 amperes in the main wire and 4amperes in one of the branches, how much current is in the other branch
a 117-cm-long 3.00g string oscillates in its n 3 mode with a frequency of 180hz and a maximum amplitude of 5.00mm.
A solid spherical ball of mass 1.3 kg and radius 0.15 m rolls along a smooth, level surface with a speed of 2 m/s. How far up the plane does the ball go
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