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Kim says that she was less than 10 feet away from the president when she took a picture of him with her 52 millimeter focal length camera lens. The picture shows the upper half of the president's body (or 2.7 feet of his total height). On the negative of the film, this part of his body is 18 millimeter high. Find how close was Kim to the president when she took the picture?
four charges q=4nC form a square, 20 cm on a side. what is the potential of electric field at the center of the square
A rope is wrapped around a wheel of radius R=2.0 meters. The wheel is mounted with frictionless bearings on an axle through its center. What is the moment of inertia of the wheel
Find the x and y components of vector v = (8.0 cm/s, -x direction) (answer should be in cm/s), Find the x and y components of vector d = (4.0 km, 33 degress left of the + y axis)
if the sea level pressure of the atmosphere is 92.1 bars, and the density is 65.5 kg/m^3 what is the equilibrium temperature
A bus is traveling up a hill at a speed of 34m/s. The hill is 23 degrees relative to horizontal and the coefficient of static friction between the bus's tires and the road is 0.6. What is the car's minimum breaking distance?
two point charges are on the y-axis. a 3.5 microc charge is located at y 1.10 cm and a -2.14 microc charge is located
A rocket is launched a t an angle of 53.0 degrees to the horizontal at 360 km/h and moves along a straight line with a total constant acceleration of 30.0 m/s^2 for 3.00 s. obtain the maximum height reached by the rocket
Assuming that the bond energy holding together a water molecule is typical, use table below to estimate how various molecular bonds might be broken with this energy.
A regulation table tennis ball has a mass of 2.8g and is 40mm in diameter. What is its moment of inertia about an axis that passes through its center
A negative charge of -6.0 10-6 C exerts an attractive force of 64 N on a second charge 0.044 m away. What is the magnitude of the second charge
How massive an object can be supported by a 6.0cm -diameter suction cup mounted on a vertical wall, if the coefficient of friction among cup and wall is 0.64? Suppose normal atmospheric pressure.
a six lead-acid type of secondary cells each of emf 2.0 v and internal resistance 0.015nbspomega are joined in series
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