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Kim has a far point of 29 cm. If she wants to use glasses of power -3.99 D to correct her vision. How far from her eyes should the glasses be put?
cm
What power contact lenses, placed on the eye, would Kim need?
The image behind a convex mirror (radius of curvature = 74 cm) is located 22 cm behind the mirror. What is the magnification of the mirror?
A 4.4kg ball with a velocity of 5.0m/s in the+x-direction collides head-on elastically with a stationary 2.5kg ball. What is the speed of the second ball after the collision
A jeweler working with a heated 47 g gold ring should lower the ring's temperature to make it safe to handle. If the ring is initially at 99 degrees Celcius, what mass of water at 25 degrees Celcuis is needed to lower the ring's temperature to 38 ..
Find the angular velocity of the earth as it spins on its axis and the tangential velocity of an object at the equator and one at the University of West Florida in Pensacola
The Sun is a low mass star and so would never have the core fusion reactions of massive stars. Yet, the Sun has iron in its atmosphere, as well as gold, silver and other elements much heavier than iron and why?
An airplane flies due north in a region where Earth's magnetic field has magnitude 5.3×10?5T, declination 0?, and inclination 75?. What's the induced emf between the wingtips, 36 m apart, when the plane flies at 230m/s
A hot ( ) lump of metal has a mass of 250g and a specific heat of 0.25 . John drops the metal into a 500g calorimeter containing 75g of water at . The calorimeter is constructed of a material that has a specific heat of 0.10 . When equilibrium is ..
A conveyor belt at a quarry lifts 2,000 kg of sand per minute up a vertical distance of 12 meters. The sand is at first at rest, then moves at a speed of 0.20 m/s along conveyor belt. What is the instantaneous power generated by this machine .
What is an electric potential at a point
If an average frequency emitted by a 200,-,rm W light bulb is 5.00 times 10^{14} , {rm Hz}, and 10.0 percent of the input power is emitted as visible light, approximately how many visible-light photons are emitted per second .
Three 1.2 kg masses are located at the vertices of an equilateral triangle 88 rm cm on a side, connected by rods of negligible mass. Find out the rotational inertia of this object.
How many energy is consumed by a 1.10kW hair dryer used for 11.0min and a 10.0W night light left on for 11.0hr
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