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A convex lens is held over a piece of paper outdoors on a sunny day. When the paper is held 30 {\rm cm} below the lens, the sunlight is focused on thepaper and the paper ignitesWhat is the focal length of the lens?
which of these is correct about passing an argument by call-by-value process?a copy of argument is made into the formal
a cylinder with a movable piston contains gas at a temperature of 27 degrees celsius a volume of 1.50m3 and an absolute
The force of repulsion that two like charges exert on each other is 4.0 N. What will the force be if the distance between the charges is increased to 6 times its original value.
Hooke's law describes a certain light spring of unstretched length 37.0 cm. Find the length of the spring in this situation
A 1.50-mcylinder of radius 1.10cmis made of a complicated mixture of materials. Its resistivity depends on the distancexfrom the left end and obeys the formulap(x) = ax + bx^2, whereaandbare constants. At the left end, the resistivity is2.25 E-8 o..
A bicycle wheel rotates uniformly through 2.0 revolutions in 4.0 s. What is the frequency of the wheel's revolution
You calculated a value of 0.49 s ± 0.04 s for the time constant from your graph. If you used a 1M?, what is the equivalent capacitance of your circuit
consider the following.a calculate the angular momentum of earth that arises from its spinning motion on its axis
A 2.10-kg ball, moving to the right at a velocity of +4.60 m/s on a frictionless table, collides head-on with a stationary 6.30-kg ball. Find the final velocities of (a) the 2.10-kg ball and of (b) the 6.30-kg ball if the collision is elastic. (c)..
A shotgun fires a large number of pellets upward, with some pellets traveling very nearly vertically and others as much as 1.0o from the vertical. suppose that the initial speed of the pellets is uniformly 150ms-1 and ignore air resistance.
An alpha particle (charge +2.0e) is sent at high speed toward a gold nucleus (charge +79e). What is the elctrical force acting on the alpha particle when it is 2.0e-14m from the gold nucleus?
You are trying to overhear a juicy conversation, but from your distance of 15m. It sounds like only an average whisper of 20 dB. So you decide to move closer to give the conversation a sound level of 60 dB instead. How close must you come.
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