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A compound microscope has a barrel whose length is 19.7 cm and an eyepiece whose focal length is 1.7 cm. The viewer has a near point located 25 cm from his eyes. What focal length must the objective have so the angular magnification of the microscope is -330?
A cylindrical container 1.3 tall contains mercury to a certain depth, d. The rest of the cylinder is filled with water. what is the depth d
A ball rolls down a hill 100 m. The hill is inclined 60 degrees. what is the final rotational speed of the ball
The jumping squirrel. A squirrel wants to jump from a point A on a branch of a tree to a point B on another branch. at what angle to the horizontal should he jump
Two bicycle tires are set rolling with the same initial speed of 3.30m/s along a long, straight road, What is the coefficient of rolling friction for the tire under low pressure
You have an open rgan pipe and a closed organ pipe. The fundamental frequency of the open pipe is 300hz. The closed piped third harmonic is the same frequency as the open pipe second harmonic. What is the length of each pipe.
A 7.0kg hammer strikes a nail at a velocity of 8.6m/s and comes to rest in a time interval of 8.0 ms, estimate the average force acting on the nail
A laser peripheral iridotomy is a procedure for treating an eye condition known as narrow-angle glaucoma, in which pressure buildup in the eye can lead to loss of vision. How many photons does the laser deliver
The highest string on a guitar has a vibrating length of 60 cm and a vibrating mass of 0.9 g. What is the wavelength of the waves on the string
The electric motor of your new 2012 Chevrolet Volt is rated at 111 kW [W=J/s]. The mass of the car is 1600kg. How much time will it take to reach the higher speed
A 80-g bullet is fired from a rifle having a barrel 0.582 m long. Choose the origin to be at the location where the bullet begins to move. Then the force (in newtons) exerted by the expanding gas on the bullet is 14100 + 9100x - 24250x2, where x is i..
A 10.00kg box on a smooth, frictionless, horizontal surface experiences a downward force of 30n at an angle of 40 degrees to the horizontal. The box moves 1.50 m to the right. What was the work done by gravity.
Two plastic semicircular rods are arranged into a complete circle with radius 8.5cm. The top half has charge of +15 pC, and the bottom half has charge of -15pC. Determine the magnitude and direction of the electric field at the center of the circl..
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