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Running into the train at that speed would severely damage both train and passengers. Calculate the minimum time Superman must take to stop the train, if the passengers experience an average horizontal force of 0.570 their own weight.
How far does the train then travel while being slowed to a stop?
A flowerpot falls off a windowsill and falls past the window below. You may ignore air resistance. It takes time 0.420s to pass this window, which is of height 1.92 m. How far is the top of the window below the windowsill from which the flowerpot ..
When a current of 2.0A flows in the 100-turn primary of an ideal transformer, this causes 14 A to flow in the secondary. How many turns are in the secondary
The sound intensity in front of a loudspeaker diaphragm vibrating at 2kHz is 4.3 W/m^2, with an acoustic power output of 0.3W. Calculate the diameter of the diaphragm. in cm
Estimate the force exerted on your fingertip if you place it at this point. Assume area of the fingertip to be 1.4cm^2
a 1.50 m section of it at one end is bent 90° in the negative z direction. Illustrate what is the total magnetic flux through the surface? Choose directions for the area vectors so that the flux through each surface is positive.
A "75 Watt" light bulb uses an average power of 75 W when connected to an rms voltage of 120V. what is the maximum current in the light bulb
A golfer drives a golf ball with a velocity of 100ft/sec and an angle of 45 degrees, Find the time of travel for the ball
a horizontal spring mass system oscillates on a frictionless table. find the maximum extension of the spring
Suppose a tank contains 636 m3 of neon (Ne) at an absolute pressure of 1.01×105 Pa. The temperature is changed from 293.2 to 295.8 K
a rifle with a mass of 2.8 kg fired a bullet with a mass of 0.003 kg. the bullet moves with a muzzle velocity of 420 m/s after the rifle is fired
A charge q = -6.0 µC is moved 0.25 m horizontally to point P in a region where an electric field is 250 V/m directed vertically, as shown. What is the change in the electric potential energy of the charge?
The maximum speed of the photoelectrons from a photoelectric experiment with a silver surface (work function: 4.73 eV) is found to be 3.00× 106 m/s
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