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A spring is stretched by an initial amount from its relaxed state. If the spring is then stretched by nine times that amount from its relaxed state, by what factor does the amount of mechanical energy stored in the spring change?
a .25 x .25 square specimen of a material of yield strength 50000 psi is loaded to this yield point and released. the
Electromagnetic wave 1 has a maximum electric field of 56V/m , and electromagnetic wave 2 has a maximum magnetic field of 2.0muT, Calculate the average intensity of the first wave
A lead ball is dropped into a lake from a diving board5.50 m above the water. What is the average velocity of the ball
You slam on the brakes of your car in a panic and skid a distance on a straight and level road. If you had been traveling at half the speed, what distance would the car have skidded under the same conditions?
A long solenoid (cross-sectional area = 0.88 x 10-6m2, number of turns per unit length = 2671 turns/m) isbent into a circular shape so it looks like a doughnut. Thiswire-wound doughnut is called a toroid
two gliders are moving on a horizontal frictionless air track. glider 1 has mass m1 194.3 g and is moving to the right
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.50 x 104 m/s, and the radius of the orbit is 5.00 x 106 m. What is the orbital speed of the second satellite
Discuss the position and size for the n = 1 state of Harmonic Oscillator. How do you picture this state? What is her size relative to the well wall? Does she penetrate the wall much?
A microphone in the ocean is sensitive to sounds emitted by porpoises. To produce a usable signal, sound waves striking the microphone must have an intensity of 10.7 dB. If porpoises emit sound waves with a power of 0.0491 W, how far can a porpois..
Figure gives the kinetic energy of the block as a function of position x; the scale of the figure's vertical axis is set by Ks = 40.0 J. If the block's initial speed is 4.00 m/s, what is the normal force on the block?
Use the letters A, B, and C to illustrate the general format of a single-replacement reaction. Metals above hydrogen in the activity series react with acids to give what two products? What general type of reaction does this exemplify?
A device used in radiation therapy for cancer contains 0.81 g of cobalt-60 (59.933 819 u). The half-life of this isotope is 5.27 yr. Determine the activity (in Bq) of the radioactive material.
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