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A spring whose force constant k= 84 nt/m is suspended by one end from a support. The unstressed spring's length is .66 m. Find the length of the spring when a mass of M= 12 kg is suspended from the lower end, in equilibrium.
An oil droplet with 13.0 excess electrons is observed between two parallel electrodes spaced 11.0mm apart. What is the radius of the droplet
A pitcher throws a 0.140 KG baseball, and it approaches a bat at 30.0 m/s. The Bat does Wnc=70.0J work on the ball in hitting it. Ignoring air resistance, deterring the speed of the ball after the ball leaves the bat and it has gone 25.0m.
An air-filled spherical capacitor is constructed with an inner-shell radius of6.50cm and an outer-shell radius of15.0cm. What potential difference between the spheres results in a 4.00-µC charge on the capacitor
A diffraction grating produces a first order bright fringe that is 0.226 m away from the central bright fringe on a flat screen which is 0.675 m away. What is the wavelength of the light shining on the grating
A box of mass 52 kg is pushed up an incline that has a total length of 7.0 m and is tilted 21° away from the horizontal. What is the work done by the weight on the box
A skydiver reaches a "terminal velocity" of 120 km/h. If the skydiver has a mass of 59kg, what is the magnitude of the upward force on the skydiver
A 0.4 kg block of iron, with a specific heat of 448 j/(kgK),is initially at 500 degrees Celsius. What is the final equilibrium temperature of the block and water
an 8-kg mass is observed traveling with a speed .08c.a what is its classical momentum? what is its relativistic
A 5.0-kg projectile is fired over level ground with a velocity of 200.0 m/s at an angle of 30.0 ° above the horizontal
A jogger generates heat energy at a rate of 808.2 W. If all this energy is removed by sweating, how much water must evaporate from the jogger's skin each hour
A strong lightning bolt transfers about 26 C to Earth. How many electrons are transferred? The elementary charge is 1.60218 × 10?19 C
Consider a bar (L=3.00m) is sliding to the right on 2 rails with a velocity (0.75 m/s) towards a resistor (20 ohms), calculate the "Magnetic Braking force"
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