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A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160 m drops a package. Two seconds later it drops a second package. How far apart will the two packages land on the ground?
A 1.00 uF capacitor is connected in parallel with a 2.00 uF capacitor. The 1.00 uF capacitor carries a charge of +10.0 uC on one plate, Find the equivalent capacitance of the two capacitors
A ray of light has an angle of incidence of 34.0 ° on a block of quartz and an angle ofrefraction of 17.5°. What is the index of refraction for this block of quartz?
When you bend your knee, the quadriceps muscle is stretched. What size force does the femur exerts on the kneecap if the tendons are oriented as in the figure and the tension in each tendon is 60 {\rm N}
A constant torque of 28- N•m is applied to a grindstone whose moment of inertia is 0.130 kg•m2. Using energy principles, and avoiding friction, find out the angular speed after the grindstone has made 15 revolutions.
Two equally charged insulating balls each weigh 0.40 g and hang from a common point by identical threads 45 cm long. The balls repel each other so that the separation between their centers is 6.6 cm.
A concert loudspeaker suspended high off the ground emits 42 W of sound power. A small microphone with a 1.0 cm2 area is 43 m from the speaker. (a) What is the sound intensity at the position of the microphone
There are two categories of ultraviolet light. Ultraviolet A ( UVA ) has a wavelength ranging from 320nm to 400nm. What are the ranges of the wave numbers for UVB
q1. a dockworker applies a constant horizontal force of 79.0 to a block of ice on a smooth horizontal floor. the
A car with a mass of 2400 kg is traveling at a speed of 40.0 km/h on an icy road when it collides with a 10000 kg truck which was traveling toward the car with the speed of 18 km/h. Find the change in the kinetic energy of the system
q1. a magnifier has a magnification of 7x.how far from the lens must an object be placed so that its virtual image is
A 950-kg cylindrical can buoy floats vertically in salt water. The diameter of the buoy is 0.920 m. Calculate the additional distance the buoy will sink
An object of mass 2 kg is moving on a spring with a frequency of 120 Hz and an amplitude of 1.5 m. What is the objects maximum velocity
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