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A railroad car of mass 3.5*10^4 kg moving at 2.50 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.20 m/s.(a) What is the speed of the three coupled cars after the collision?(b) How much kinetic energy is lost in the collision? (joules)
What minimum coefficient of kinetic friction is required to bring the crate to a stop over a distance of 5.0 m along the lower surface.
In lab, your instructor generates a standing wave using a thin string of length L = 2.10m fixed at both ends. What is the maximum transverse speed vy of the bead
The place you get your hair cut has two nearly parallel mirrors 7.0 m apart. As you sit in the chair, your head is 1.0 m from the nearer mirror. Looking toward this mirror, you first see your face and then, farther away, the back of your head.
A capacitor consists of two closely spaced metal conductors of large area, separated by a thin insulating foil. Calculate the amount of energy stored in the capacitor
a skydriver weighs 131 lb. when the skydriver reahces terminal speed, how much air drag does the skydriver is experience
Object 1 has a mass m1 and a velocity 1 = (2.87 m/s). Object 2 has a mass m2 and a velocity 2 = (3.01 m/s). The total momentum of these two objects has a magnitude of 18.0 kg • m/s and points in a direction 66.5° above the positive x-axis. Find out m..
Two resistors of wattage 100 W each is connected in series with a source. Find the total watage of load connected in circuit
If an object on a horizontal, frictionless surface is attached to a spring, displaced, and then released, it will oscillate. If it is displaced 0.180 m from its equilibrium position and released with zero initial speed, then after 0.950 s its disp..
Blood is conductive enough that it can be treated as a moving conductor. what is the magnitude of the voltage that is measured with the electrodes in the drawing
A mass of 0.4 kg, is connected to a spring with a spring constant of 100 N/m, What is the maximum speed of the mass and What is the energy stored in the mass/spring system when its speed is half the maximum value
The drawing shows a bicycle wheel resting against a small step whose height is h = 0.108 m. What is the magnitude of the force when this happens
The motion detector used in a physics lab sends and receives 49.55 kHz ultrasonic pulses. find the wavelength of the waves emitted by the motion detector
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