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A huge explosion is heard 109 kilometers away. How long does it take the sound to travel that far? (Assume ambient air temperature is 24 degrees C). Record your answer to the nearest whole second. No decimal places in your answer. Be careful of your units.
A hot-air balloon is accelerating upward under the influence of twoforces, its weight and the buoyant force. What is the acceleration of the rising balloon
A coil of 160 turns and area 0.20 m2 is placed with its axisparallel to a magnetic field of 0.40 T. The magnetic field changes from 0.40 T in the x-direction to 0.40 Tin the negative x-direction in 2.0 s. If the resistance of the coil is 16 Ω, at ..
An express subway train passes through an underground station. It enters at t = 0 with an initial velocity of 22.0 m/s and decelerates at a rate of 0.150 m/s2 as it goes through. How long is the nose of the train in the station
particle a of charge 7.00 10-4 c is at the origin particle b of charge -8.00 10-4 c is at 6.00 m 0 and particle c of
You are flying to Chicago for a weekend away from the books. In your last physics class, you learned that the airflow over the wings of the plane creates a lift force , which acts perpendicular to the wings.
Suppose one gallon of gasoline produces 1.1 x 108 J of energy, and this energy is sufficient to operate a car for twenty miles. how many miles could the car go with that energy
A wall consists of 2 layers of material: brick in front of an equal thickness of wood. how does the temperature gradient across the wood compare to the gradient across the brick
A uniform electric field with a magnitude of 6050 N/C points in the positive x direction. Find the change in electric potential energy with a +12.5-µC charge is moved 5.50 cm in (a) the positive x direction (b) the negative x direction, and (c) i..
A 2100 kg car moving east at 10 m/s collides with a 3000 kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 35 ° north of east and at a speed of 5.03 m/s. Find the speed of the 3000 kg car before th..
Two resistors with R1 = 1,750 and R2 = 3,750 are connected in series. What is the equivalent resistance of the two resistors
Several bacteria are propelled by motors that spin hair-like flagella. A characteristic bacterial motor turning at a constant angular velocity has a radius of 1.9x10 -8 m, and a tangential speed at the rim of 2.9x10 -5 m/s. (
A body of mass 2.9 kg makes an elastic collision with another body at rest and continues to move in the original direction but with one-fourth of its original speed. What is the mass of the other body
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