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A point source of light is submerged 3.58 m below the surface of a lake and emits rays in all directions. On the surface of the lake, directly above the source, the area illuminated is a circle. What is the maximum radius that this circle could have?
A person in a cave emits a sound and receives an echo 2.5 seconds later. How far is that person away from the wall
a pendulum is made of a uniform stick of length l. it is allowed to swing in a vertical plane. where should the pivot
1 two equally charged spheres of mass 0.001kg are placed 0.02m apart. what is the eletrictric repulsive force that they
A charged belt, 50 cm wide, travels at 30 m/s between a sourceof charge and a sphere. The belt carries charge into the sphere ata rate corresponding to 100 μA. Compute the surface chargedensity on the belt.
A person drops a cylindrical steel bar (Y = 2.00 × 1011 Pa) from a height of 3.30 m (distance between the floor and the bottom of the vertically oriented bar). what is the maximum compression of the bar
the center of mass of a proton with mass 1.673middot10-27 kg and alpha particle with mass 6.645middot10-27 kg is moving
A 10.0g ball of clay traveling east at 1.50m/scollides and sticks together with a 60.0g ball of clay traveling north at 8.50m/s. What is the speed of the resulting ball of clay
A small plastic sphere with a charge of - 5.0 nC is near another small plastic sphere with a charge of - 12 nC. what is the distance between the sphere
A satellite is in a circular orbit around the earth. The period of the satellite is 22 hr.
A package in an airplane moving horizontally at 275 m/s is dropped while the altitude is 766 meters. How far forward from the spot over which it was dropped does the package land.
A thin rod consists of two parts joined together. One-third of it is silver and two-thirds is gold. The temperature decreases by 31.7 C°. Determine the fractional decrease ?L/(LSilver + LGold) in the rod's length, where LSilver and LGold are the init..
A jetliner is moving at a speed of 216 m/s. The vertical component of the plane's velocity is 79.70 m/s. establishes the magnitude of the horizontal component of the plane's velocity.
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