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A 6.0-mm-diameter microscope objective has a focal length of 9.0 mm.
a. What object distance gives a lateral magnification of -40?
b. What is the lens's numerical aperture in air?
In outer space a rock of mass 8 kg is acted on by a constant net force N during a 5 s time interval. What was the rock's velocity at the beginning of the time interval
A rock is thrown vertically upward with an initial speed of 100 ft/s. At the same instant another rock is thrown vertically downward from the top of a 280 ft cliff with an initial speed of 40 ft/s. Find the time when the rocks pass each other
A string on a string bass is tuned to vibrate at a fundamentalfrequency of 56.0 Hz. If the tensionin the string were increased by a factor of 3, what would be the new fundamental frequency
A rectangular coil of wire with 25 loops carries a current of 24.2 mA. The coil's dimensions are 8.5 cm by 2.3 cm. What is the magnetic moment of the coil
Consider an object that is in an elliptical orbit with semimajor axis a = 3.1×106 m about a planet of mass M = 2.2×1023 kg. What is the speed of the object When it is closest to the planet at r = a/4
A very strong, but inept, shot putter puts the shot straight up with an initial velocity of 11.0 m/s. How long does he have to get out of the way
The expression for the torque on a current loop was derived assuming that the magnetic field was uniform. If the loop is free to rotate about the x-axis, find the magnitude of the magnetic torque on the loop.
suppose that each vehicle is initially moving at 8.60 m/s and that they undergo a perfectly inelastic head-on collision. what force does the seat belt exert on each driver
Two cars of equal mass collide on a horizontal frictionless surface. What is the speed of the composite body (A+B) after the collision
During basketball tryouts, Umass walk-on hopeful Dwayne Madison stole a pass at his own free throw line. He then spring straight down the court to the opponent's free throw line, What was his avg velocity
The power of sunlight reaching each square meter of the Earth's surface on a clear day in the tropics is close to 1 000 W. On a winter day in Manitoba, the power concentration of sunlight can be 100 W/m2. Find the power per unit area used by the ca..
The interior of a refrigerator has a volume of 0.600 m3. The temperature inside the refrigerator in 282 K, what is the mass of air inside the refrigerator
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