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The intensity of the sound wave from a jet airplane is 9.1 W/m2 at a distance of 130 m. At what rate does the jet airplane radiate energy in the form of sound waves? Assume that the sound wave radiates from the airplane equally in all directions.
in MW?
One cubic meter (1.00 m3) of aluminum has a mass of 2.70 103 kg, and the same volume of iron has a mass of 7.86 103 kg. Find the radius of a solid aluminum sphere
A spaceship of mass 2.3×10^6kg is cruising at a speed of 6.0×10 ^6m/s when the antimatter reactor fails, blowing the ship into three pieces. What is the direction of the third piece
A proton enters a uniform 0.2T magnetic field at right angles. What is the frequency of the proton's subsequent circular orbit
A conical pendulum is formed by attaching a 41.0 g mass to a 1.3 m string. The mass swings around a horizontal circle of radius 32.0 cm. What is the tension in the string
A cannon fires a cannon ball at 769.26 m/s in a straight line that passes directly over an observer's head. how far is the cannon from the observer
Nik is walking a tightrope across Niagara Falls. The tightrope spans 460m. Find the tension in the tightrope while he is standing at this point
Consider a uranium nucleus to be a sphere of radius R = 7.4x10^-15 m with a charge of 92 e distributed uniformly throughout its volume. What is the electric force exerted on an electron
A proton is moving through a magnetic field of strength 2 kT with a speed of 2.5*10^8 m/s, what is the angle between the proton's velocity and the direction of the field
Given the initial velocity V1=2i+1j m/s of a moving object. It is subject to the acceleration A=1i+2j m/s^2, What is the object's final speed
Assume that none of the alpha particles bounced back from the sheet, meaning that the alpha particles either were captured by the shielding or penetrated completely through the shielding.
If the ropes supporting the rings are attached to ceiling directly above, what is the tension in each rope.
If the balls are released from a height where the bottom of the basketball is at 0.781m above the ground, what is the absolute value of basketball's momentum just before it hits the ground.
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