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A runner is going 25 m/s around a curved section of track that has radius of 125 meter. Compute what is the runners acceleration?
At a distance r away from a point charge q, the electric potential is V = 600 V and the magnitude of the electric field is E = 200 N/C
A string on a violin is stretched between two points 20.0 cm apart with a tension of 120 N. The total length of the string is 31 cm and it has a mass of 0.62 grams. The frequency of the third harmonic is?
Consider a radar system in an air traffic control center that ismonitoring the distance to an approaching airplane. If the airplaneis 3.81 km from the control center, what is the time delay between a transmitted wave pulse and thereturn of the ref..
A superhero flies 147 m from the top of a tall building at the angle of 33 degrees below the horizontal. What is the vertical component of the superhero's displacement.
A wing produces lift by diverting the flow of air, producing higherpressure below the wind and lower pressure above the wing. Find thelift produced by an airplane wing having an area of 30 squaremeters if the air velocity over the uper and lower s..
One ton of coal is burned by a power plant every minute. The energy produced when one kg of coal is burned is 3.2 x 10^7 joules. calculate the efficiency of the power plant
Traumatic brain injury such as concussion results when the head undergoes a very large acceleration. Calculate the magnitude and duration of the acceleration
A wheel starts from rest and rotates about its axis with constant angular acceleration. After 7.4 seconds have elapsed, it has rotated through an angle of 23 radians. What is the angular velocity when t=7.4 seconds?
a helium nucleus has radius rhe 1.9 fm mass m 6.6 times 10-27 kg and charge 2e. a gold nucleus has charge 87e and
A second force F2 is added to F1 . The resultant of the two vectors has a magnitude of 370 newtons and points along the (a) east/ (b) west line. Find the magnitude and direction of F2.
A grinding wheel of radius 0.280 m rotating on a frictionless axle is brought to rest by applying a constant friction force tangential to its rim. Find the magnitude of the friction force
An airplane flies from Boston to San Francisco (a distance of 5000 km) in the morning, then immediately returns to Boston. What is the average speed relative to the ground on the way back to Boston
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