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A microscope for viewing blood cells has an objective with a focal length of 0.57 cm and an eyepiece with a focal length of 3.2 cm. The distance between the objective and eyepiece is 12.3 cm. If a blood cell subtends an angle of 2.1 x 10-5 rad when viewed with the naked eye at a near point of 25.0 cm, what angle (magnitude only) does it subtend when viewed through the microscope?
a runner starts from rest and in 3 seconds reaches a speed of 9 ms. if we assume that the speed changed at a constant
A resistor with resistance 14M? is connected in series with a capacitor with capacitance 1.0?F and a battery with emf 13.5.0V. what is the time constant
a mass m moves at speed v0 perpendicular to a dumbbell at rest on a frictionless horizontal table. the dumbbell
An 85 percent-efficient pump is used to increase the pressure of water in a 10-cm-diameter pipe from 120 to 800 kPa. What is the required horsepower of the pump for a ?ow rate of (a) 0.015 m3=s, (b) 20 L=s, and (c) 4000 gal/h?
A 1.3 m length of wire carrying 5.9 A of current toward the south is oriented horizontally. Estimate the magnitude of the magnetic force on the wire due to the Earth's magnetic field of 5.5 ? 10-5 T at this point
A powerful motorcycle can produce an acceleration of 3.00 m/s2 while traveling at 90.0 km/h. What force does the motorcycle exert backward on the ground
Suppose your waffle iron is rated at 1.20 kW when connected to a 3.00 102 V source. What current does the waffle iron carry
suppose a manufacturing company makes a certain item. the time to produce each item is normally distributed around a
X rays of wavelength 0.0196 nm are directed in the positive direction of an x axis onto a target containing loosely bound electrons. determine the corresponding change in photon energy
An early model of the hydrogen atom viewed it as an electron orbiting a proton in a circular path with a radius of 5.29×10?11m. What would be the speed of the electron in this model
An elephant's legs have a reasonably uniform cross section from top to bottom, and they are quite long, pivoting high on the animal's body. how many steps per minute will the elephant take
A car accelerates from rest at a constant rate of 2.0 m/s^2 for 5.0 s. What is the speed of the car at the end of that time
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