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A 5.78 kilogram object falls freely (neglect air resistance), after being dropped from rest. Obtain the initial kinetic energy, the final kinetic energy, and the change in kinetic energy for the following.
(a) first meter of fall
(b) second meter of fall
An 8.70-kg block slides with an initial speed of 1.51 m/s up a ramp inclined at an angle of 27.4 degrees with the horizontal. calculate the distance the block slides before coming to rest.
A 20x telescope has a 12 centimeter diameter objective lens. Find what minimum diameter must the eyepiece lens have to collect all the light rays from an on-axis distant source
A point source of light is 70.0 cm below the surface of a body of water. Find the diameter of the circle at the surface through which light emerges from the water.
In soccer, a speed record was set for kicking a soccer ball at 43m/s. If the soccer player kicked the ball from ground level at an angle of 30° from the horizontal, what would be the flight time of the soccer ball? Assume that air resistance is ne..
A violin string vibrates at 264 Hz when unfingered. At what frequency will it vibrate if it is fingered one fourth of the way down from the end
Esitmate the change in temperature of 5 m^3 of air, to an increase in pressure of 50 kPa. The initial temperature of the air is 15*C at atmospheric pressure
One particle, of mass m, moves with a speed v in the x-direction, and another particle, of mass 2m, moves with a speed v/2 in the y-direction. What is the velocity of the center of mass of these two particles
A series RCL circuit has a resonant frequency of 2200 Hz. When operating at a frequency other than 2200 Hz, the circuit has acapacitive reactance of 5.50 ohms and an inductive reactanceof 35.0 ohms.
when an ac source is connected across a 15.0 omega resistor the rms current in the resistor is 7.10 a.a find the rms
Only two horizontal forces act on a 4.5 kg body. One force is 5.8 N, acting due east, and the other is 2.7 N, acting 25° north of west. What is the magnitude of the body's acceleration
a model rocket is launched straight upward with an initial speed of 50.7 ms. it accelerates with a constant upward
light with a frequency of 5.40 x 10^14 Hz travels in a block of glass that has an index of refraction of 1.52, what is the wavelenght of the light in vacuum
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