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If the top row of Pascal's triangle (which contains the single number ‘1') is denoted row zero, what is the sum of all the numbers in the triangle above row N?
Electric breakdown (sparks) occur in air if the electric field reaches 3 × 106 N/C. How far must a free electron move under the influence of the above electric field
A 40 g bullet traveling 500 m/s penetrated 5 cm into a tree trunk. what was the retarding force on the bullet
Use Newton's second law to determine the magnitudes of the forces that ropes 2 and 3 exert on the knot. Suppose that T1onK = 1000 N . Determine the magnitude of the force that rope 2 exerts on the knot. Express your answer to two significant figure..
A whistle with frequency 395 Hz moves at speed 18 m/s in a horizontal circle at the end of a rotating stick. Determine the highest frequency heard by a person riding a bicycle at speed 15 m/s toward the whistle.
A car plus its driver has a mass of 1400 kg. when the driver takes his foot off the accelerator, the car slows from 30 m s^-1 to 20 m s^-1 in 20 s. how much work was done by dissipative forces
An aircraft carrier is moving to the north at a constant 22 mph on a windless day. How fast must the plane be traveling relative to the deck of the aircraft carrier to take off if the plane is headed north
Friction provides the force required for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 80.0 m and the coefficient of friction is 0.40?
If an electron travels 0.210 m from an electron gun to a TV screen in 29.3 ns, what voltage was utilized to accelerate it? (Note that the voltage you get here is lower than actually used in TVs to avoid the necessity of relativistic corrections.)
A particle p traveling with a speed of vpi = 3 m/s hits and scatters elastically from another particle N, initially at rest. What is the magnitude of the momentum of the recoiling N
when a current flows in an aluminum wire of diameter 4.35 mm the drift speed of the conduction electrons is 2.57 times
The function y(x, t) = (25.0 cm) cos(?x - 20?t), with x in meters and t in seconds, describes a wave on a taut string. What is the transverse speed for a point on the string at an instant when that point has the displacement y = +22.0 cm?
A compass originally points North; at this location the horizontal component of the Earth's magnetic field has a magnitude of 2e-5 T. What is the magnetic dipole moment of the bar magnet
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