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An object is 1m from a screen. at what points may a 0.05-m focal length lens be placed so as to produce a sharp image on the screen? what are the corresponding magnifications?
A 2.5 m-long pendulum is released from rest when the support string is at an angle of 20° with the vertical. What is the speed of the bob at the bottom of the swing?
A nuclearpower planthas a reactor that produces heat at the rate of870MW. At what rate is heat discarded to the environment by this power plant
Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. What is the total time the blue car is moving
Two rocks are thrown off the edge of a cliff that is 15.0 m above the ground. The first rock is thrown upward, at a velocity of +12.0 m/s. determine at what velocity it hits
A 390 ohm resistor and a 6.10uF capacitor are connected in parallel to an ac generator that supplies an rms voltage of 220V at an angular frequency of 360rad/s.
A lightbulb operates at a power of 60 watts when connected to a potential difference of 120 volts. In this condition, how many electrons are passing though it per second
Solid argon has a density of 1650 kg/m cubed. The atomic weight of argon is 40. Assuming each atom occupies a cubical volume, what is the distance bewteen the argon atoms
Consider laser eye surgery, in which laser light with a wavelength of 426 nm at a power output of 1.6 W is used to reattach a detached retina. how many photons are emitted by the laser
when two light bulbs are connected in series bulb a is brighter than bulb b.if the positions of the bulbs were reversed
Consider a rocket launched from Vandenberg AFB, CA (longitude=34.6 degrees) having an initial velocity of 3 km/s in the northerly direction relative to the launch site.
A clay vase on a potter's wheel experiences an angular acceleration of 8.21 rad/s2 due to the application of a 17.7-N m net torque. Find the total moment of inertia of the vase
Soles of boots that are designed to protect workers from electric shock are rated to pass a maximum rms current of 1.3 mA when connected across an 1.7×10^4V AC source.
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