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A bungee cord is stretched between two poles 491 meters apart and it has a mass of 775 grams. If the force needed to stretch the bungee cord is 440 N, what is the velocity of a wave on this bungee cord?
In a cloud chamber experiment, a proton enters a uniform 0.250 T magnetic field directed perpendicular to its motion. How fast was the proton moving
A 5.0-kg mass starts from rest and accelerates to a velocity of 8.0 m/s in a time of 10.0 seconds. Calculate the force that is acting on the mass
A rectangular wire loop with a cross-sectional area of 5,000 cm^2 carries a current of 0.50 amperes. The loop is free to rotate about an axis that is perpendicular to uniform magnetic field strength of 0.40 Tesla. The plane of the loop is initial..
A 307-kg boat is sailing 13.8° north of east at a speed of 2.16 m/s. Thirty seconds later; it is sailing 32.4° north of east at a speed of 3.76 m/s. Find the magnitude and direction of the force vector
A 4.35 ohm resistor, a 5.33 ohm resistor, and a 13.54 ohm resistor are connected in series with a 24.0 V battery. What is the equivalent resistance
In the figure below, a butterfly net is in a uniform electric fieldof magnitude E = 3.0 mN/C.The rim, a circle of radius a = 10 cm, is aligned perpendicular to the field. Thenet contains no net charge. Find the electric flux through the netting.
A singly charged ion of mass m is accelerated from rest by a potential difference ?V. What is the ratio of the masses of the ions
A friend of yours who starts out at the same age as you travels to the alpha centauri solar system which is 4.70 light-years away. How fast did she travel
If there is 1 kg of Cm-242 initially, what is the activity of Cm-242 after 4 years? Assuming zero Pu initially, what is the Pu-238 activity at the end of the 4 year period?
What is the Acceleration of an object moving on a circular track
Two cannonballs, C and D, are fired from the ground with identical initial speeds, but (theta)a larger than (theta)b. Determine which cannonball reaches a higher elevation
the planet neptune is 4.5 x1012m from the earth. its diameter is 4.9 x 107m. what diameter telescope objective would be
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