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A child is looking at a beetle that is 25 millimeter (10 inches) away, with the unaided eye. Then, the child uses a magnifying glass with a focal length f= 12.5 millimeter to examine the beetle. Determine how much larger will the beetle appear?
A wire that is 2.00 m long and carrying a current of 10.0 A is at right angles to a uniform magnetic field. The force acting on the wire is 0.45 N. What is the strength of the magnetic field?
Horizontally polarized light passes through two ideal linear polarizers with transmission directions making angles of ? and - ? with the horizontal direction. Find polarization state of the emergent light
An airplane is heading due south at a speed of 600 km/h. If a wind begins blowing from the southwest at a speed of 100km/h (average), Determine the velocity of the plane relative to ground
An astronaut leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth. how long does the trip take
A certain metal with atomic mass 2.6 × 10?25 kg has an interatomic bond with length 2.5 × 10?10 m and stiffness 45 N/m. What is the speed of sound in a rod made of this metal
A transparent film has a thickness of 0.003250 cm, and a refractive index of 1.4000. Find the order of interference at theta=0 degrees
In some kinds of optical spectroscopy, such as photoluminescence and Raman spectroscopy, a laser beam exits from a pupil and is focused on a sample to stimulate electromagnetic radiation from the sample. Determine the light intensity at the spot
a 100v dc battery, a resistor and a capacitor are connected in series. The capacitor is initially uncharged. estimate the capacitance of the capacitor
A paperweight, when weighed in air, has a weight of W = 6.9N.When completely immersed in water, however, it has a weight of Win water = 4.3 N. Find the volume of the paper weight
The wavenumber of the incident radiating in a Raman spectrometer is 20487 cm-1. What is the wavenumber of the scattered Stokes radiation
A particle of 8 kg with a veloctiy of 40 m/s hits a 40 kg particle that is at rest. The collision is elastic. What are the final velocities of the particles
A string is wrapped around a pulley of radius 3.05? , and a weight hangs from the other end. What's the angular acceleration of the pulley
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