The distance between the object and the eyepiece of a compound microscope is 25.0 cm. The focal length of its objective lens is 0.200 cm and the eyepiece has a focal length of 2.60 cm. A person with a near point 25 cm is using the microscope
(a) What is the largest angular magnification obtainable using the eyepiece alone as a magnifying lens?
(b) What is the total magnification of the microscope when used by the person of normal eyesight?
(a) 10.6
(b) -1070
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A 0.30-kg mass is suspended on a spring. In equilibrium the mass stretches the spring 2.0 cm downward. The mass is then pulled an additional distance of 1.0 cm down and released from rest. Write down its equation of motion
A) y = (0.01 m) cos (22.1 t) B) y = (0.01 m) sin (22.1 t) C) y = (0.03 m) cos (22.1 t) D) y = (0.03 m) sin (22.1 t)
You have 1 kg of liquid water and 1 kg of steam. If you add 100 J of energy to each, which would experience the greatest increase in temperature?
1.the water 2.the steam 3.They will both experience the same increase in temperature. 4.It cannot be determined because it depends on the actual temperature of the water and steam as well as the pressure.
You drop a rock in a pond, and the water waves travel away from the rock with a certain speed. You drop a heavier rock in the water. The speed of the waves in the water from the heavier rock
a. remains unchanged b. increases c. decreases d. cannot be determined
In Bragg's law, 2d sin ? = m?, how is ? measured?
a. from the reflecting crystal plane b. from the normal to the reflecting crystal plane c. from the direction of the incident beam d. from the normal to the direction of the incident beam