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The desired overall magnification of a compound microscope is 140x.The objective alone produces a lateral magnification of 12x. Decide the required focal length of the eyepiece.
An amount of an ideal monatomic gas has an initial pressure of 210 kPa, an initial volume of 1.2x10-3 m3, at an initial temperature of 350 K. The gas now undergoes three processes:
a baton twirler is twirling her baton in a horizontal circle at a rate of 2.33 revolutions per second. calculate the
In the lab frame, a point charge of +q is at rest between two streams of positive charge moving at c/3. The charge per unit length in the line of moving charges is ?C/m. In the lab frame, the electrostatic forces on charge q add up to zero, and th..
A small 11.0 g- bug stands at one end of a thin uniform bar that is initially at rest on a smooth horizontal table. What is the angular speed of the bar just after the frisky insect leaps
The velocity of the air with respect to the ground is 50.0 m/s at an angle of 30.0 degrees NORTH of EAST. What is the velocity of the airplane
A knife thrower throws a knife toward a 300-g target that is sliding in her direction at a speed of 2.50 m/s on a horizontal frictionless surface. find the speed of the knife after passing through the target
The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 1.6 x 10-10 T. How much energy does this wave carry through the window
A 26.2-kg dog is running northward at 2.21m/s, while a 5.30-kg cat is running eastward at 2.83 m/s. Their 67.2-kg owner has the similar momentum as the two pets taken together. Find the magnitude and direction of the owner's velocity.
an air-core solenoid consists of 200 turns of wire wound on a form that is 45 cm long and has a inner diameter of 2 cm.
A bat flies toward a wall at a speed of 5.5 m/s. As it flies, the bat emits an ultrasonic sound wave with frequency 29.0 kHz. What frequency does the bat hear in the reflected wave
a capacitor is formed from a hollow copper sphere of inner radius 44.5 cm and outer radius 55.6 cm. calculate the
When t = 0, the position of a particle is 6 m and its velocity is 2 m/s. From t = 0 to t = 6 s, the acceleration of the particle is 2 +2t^2 m/s^2. Find the total distance that the particle moved
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