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A spring is hanging from the ceiling of an elevator, and a 5.0-kg object is attached to the lower end. By how much does the spring stretch (relative to its unstrained length) when the elevator is accelerating upward at ?
Most of the motion generated by joints in the human body are examples of levers. what force is exerted by the biceps muscle
consider two masses m1 and m2 at the top of two frictionless inclined planes. both masses start from rest at the same
While john is travelling along an interstate highway, he notices a 160 mile marker as he passes through town. Later John passes another mile marker, 119.
A stamp collector uses a lens with 7.5-cm focal length as a simple magnifier. The virtual image is produced at the normal near point (25 cm). What is the expected angular magnification
A ship moves through the water with two forces acting on it. If it starts from rest calculate how far will it move in 10 sec
how to determine the magnitude of the acceleration at the instant.
draw an accurate sketch of the vector addition of the two known forces. use a protractor to draw the forces in the
A point charge of -4.00nC is at the origin, and a second point charge of 6.00nC is on the x axis at x = 0.750m. Find the magnitude and direction of the electric field at each of the following points on the x axis.
This bat hears its own sound plus the sound reflected by the wall. Explain how fast should the bat fly in order to hear a beat frequency of 10.0Hz?
two charges -2.7 and -4.4 are located at -0.50 0 and 0.50 0 respectively. there is a point on the x-axis between the
a metal sphere of radius a is surronded by a metal shel of inner radius b and outer radius r. the flux through a
Two capacitors, C1 = 4.0mF and C2 = 9.0mF , are in series, Find the potential difference across second capacitor and Find the charge stored on the second capacitor
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