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Question: A 25 kg child bounces on a pogo stick. The pogo stick has a spring with spring constant 2.0x104 N/m. When the child makes a nice big bounce, he finds that at the bottom of the bounce he is accelerating upwards at 9.8 m/s2. How much is the spring compressed?
In a common lecture demonstration of wave pulses, If the tubing is given a transverse blow at one end, how long will it take the resulting pulse to reach the other end
Assume that a wire of linear density = 0.157 kg/m sustains a tension of 340 N as it is being stretched between two poles that are 18.4 m apart. Assume also that one end of the wire is fixed to one pole, while the other is connected to a ring which..
High-speed photos of a 240 flea jumping vertically show that the jump lasts 1.4 and involves an average vertical acceleration of 100, What's the change in the flea's momentum during its jump
q1. what must the charge sign and magnitude of a particle of mass 1.47 g be for it to remain stationary when placed in
A thermos contains 154 cm3 of coffee at 93.5 °C. Tocool the coffee, you drop two 12.7-g ice cubes into the thermos.The ice cubes are initially at 0 °C and melt completely. What is the final temperature of the coffee in degrees Celsius? Treatthe coffe..
Consider charged particles Q1= 70.0 μC, Q2= 48.0 μC , Q3= -80.0 μC which are placed in a straight line along the x-axis. Q2 is placed in the center at a distance of 0.350 m from each of the others, and Q3 is also 0.350 m from some point P, as sh..
Monochromatic light is normally incident on a diffraction grating that is 1 cm wide and has 10,000 slits. What is the wavelength, in nm, of the incident light
Item 4 To start her lawn mower, Julie pulls on a cord that is wrapped around a pulley. The pulley has a moment of inertia about its central axis of I = 0.660Kg(metersquared) and a radius of 6.00cm . There is an equivalent frictional torque impedin..
A series AC circuit contains a resistor, an inductor of 200 mH, a capacitor of 5.60 µF, and a source with ?Vmax = 240 V operating at 50.0 Hz. Calculate the inductive reactance
Tarzan spies a 35 kg chimpanzee in severe danger, so he swings to the rescue. What are the frequency and amplitude (in degrees) of Tarzan's swing
The Brusselator is a simple model for oscillatory chemical systems such as the Belousov-Zhabotinski reaction. The time evolution of the concentration of two chemical species, x and y, is described by the ODE's: dx/dt = A+x2y - (B+1)x AND dy..
A thin film of alcohol (n=1.36) lies on a flat glass plate(n=1.51). When monochromatic light, whose wavelength can bechanged, is incident normally, What is the minimum thickness of the film
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