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A "seconds pendulum" is one that moves through itequilibrium position once each second. (The period of the pendulumis 2.000 s.) The length of a seconds pendulum is 0.9921 m at Tokyo and 0.9949m at Cambridge, England. What is the ratio of the free-fall accelerations at these two locations?
A compressed-air cylinder is known to fail if the pressue exceeds 100 atm. What is the pressure inside the cylinder during the fire
a very thin circular disk of radius r 13.00 cm has charge q 20.00 mc uniformly distributed on its surface. the disk
A 75- kg child sits in a swing suspended with 3.2- m-long ropes. Use conservation of energy to determine the speed the child will have at the bottom of the arc when she is let go
What is the period of oscillation of the scale? State your reply numerically in seconds.
Three charges are located at the corners of an equilateral triangle with sides 20 cm. What is the electric field at the center of the triangle
Two cylindrical glass beads each of mass m = 32 mg are set on their flat ends on a horizontal insulating surface separated by a distance d = 3 cm. The coefficient of static friction between the beads and the surface is μs = 0.3. The beads are then gi..
Suppose that the hail comes straight down at a mass rate of m/?t = 0.030 kg/s and an initial velocity of v0 = -10 m/s, calculated the force exerted by the hail on the roof
An amplifier supplies 5.0 Watts to a perfectly efficient loudspeaker at one end of a 10.0 cm diamter tube filled with air. What is the intensity of the sound at the other end of the tube
A spherical ball of charge has radius R and total charge Q. The electric field strength inside the ball(r?R) is E(r)=Emax(r4/R4). Find an expression for the volume charge density ?(r) inside the ball as a function of r
Which of the following photons has the greatest energy?
Three electrons are aligned on a straight line and separations between them are 1.0mm. What is the electric potential energy of the center electron
A solid conducting sphere (radius=.05) has a charge of 0.25nC distributed uniformly on its surface. If point A is located at the center of the sphere and point B is 15cm from the center, what is the magnitude of the electric potential difference bet..
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