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If N is 25mm, the focal length of a certain microscope's eyepiece is 12.5 mm and the magnification of its objective lens is 50, what is the overall magnification of the microscope?
After a hard rain, you walk out into the parking lot and notice an oil sheen on top of a puddle of water. When viewed from directly above, What is the minimum thickness of the oil
A converging lens has a focal length of 6.0cm . A 1.1cm -high arrow is located 11cm from the lens with its lowest point (the tail) 4.5cm above the lens axis. Find the distance from the axis to the highest point (the head) of the arrow image
A 6-g bullet is fired into a 1.2-kg pendulum of length 83 cm. The pendulum swings by 12 degrees. What was the initial speed of the bullet? Please explain!!
Two automobiles are equipped with the same single-frequency horn. When one is at rest and the other is moving toward the first at 13m/s, What is the frequency the horns emit
A monatomic ideal gas containing 7.95 moles at a temperature of 235 K are expanded isothermally from a volume of 1.23 L to a volume of 4.44 L. Calculate the heat flow into or out of the gas
A Tsunami has a speed of 56 m/s and a 250-km wavelength. How long do they have to run to safety
A thin film of water sits on top of a flat piece of glass, and light is incident from below, what is the angle of refraction of the final outgoing ray
The gravitational force between two masses M and m seperated by a distance r is 40 N. What is the new force when this distance is halved
A person weighs 784 N in air and has a body-fat percentage of 23.0 %. What is the overall density of this person's body
You are given a sample of metal and asked to determine its specific heat. You weigh the sample and find that its weight is 28.9N. What is the sample's specific heat
A current of 1.3 A flows through a 55.8 resistor for 5.2 min. How much heat was generated by the resistor
A galvanometer whose full scale current is 150amps and coal resistance is 75ohms is used with a 1.50 ohms shunt resistor to make an ammeter. what is the largest current that can be measured by the ammeter.
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