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The focal length of the objective and eyepiece in a compound microscope are 0.8 cm and 2.5 cm, respectively. The image formed by the objective is 16cm from it and the final image is 25cm from the eye. What is the total magnification?
A decade before Einstein published his theory of relativity, J.J. Thomson proposed that the electron might consist of small parts, Find the total electric potential energy of this arrangement
An old-style TV set places 50 kV across two plates of a parallel plate capacitor. What is the speed of the electron when it exits the hole in the plate
Steam at 18 MPa and 600 C is contained in a cylinder of volume 0.5 m^3. Calculate the heat rejcted by the steam
A lamp (R = 155 ), an electric heater (R = 27 ), and a fan (R = 51 ) are connected in parallel across a 118 V line. What power is expended in the heater
A cargo plane is flying horizontally at an altitude of 11.5 km with the speed of 820 km/h when a large crate falls out of the rear loading ramp. (Ignore any effects due to air resistance.)
A ball of mas 0.250. Kg is attached to a string 0.750 m long. The ball is swung in a s pendulum-type motion such that it has a speed of 6.40 m/s, What is the corresponding tension in the string
A 0.181-kg ball has an elastic, head-on collision with a second ball that is initially at rest. What is the mass of the second ball
What is angular width of the beam
A 30-dB sound wave and a 20dB sound wave simultaneously strike a sound detector with an area of 5*10-1 cm2. Find energy absorbed by the detector in 3 hours
A convex lens with a 10-cm focal length is in front of a concave lens with a 10-cm focal length. The lenses are separated by 40 cm. Where is the final image with respect to the convex lens
Two coils have the same number of circular turns and carry the same current. Each rotates in a magnetic field acting perpendicularly to its axis of rotation, What is the radius (in cm) of coil 2
A 0.599 kg object is at rest at the origin of a coordinate system. A 3.76 N force in the positive x direction acts on the object for 2.46 s. What is the velocity at the end of this interval
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