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The intensity level of an orchestra is 82 dB. A single violin achieves a level of 70 dB. How does the intensity of the sound of the full orchestra compare with that of the violin’s sound? In other words, find the ratio.
A cannon ball is fired at an angle of 22 above horizontal with an initial speed v0 = 300 m/s, reaching a maximum height h before hitting the ground. What is the maximum height h reached by the ball
A spherical conductor is charged so that its surface potential is Vo=1000V. If the radius of the sphere is R=10m, what is the potential in the center of the sphere
a 600kg car is going over a curve with radius of 120m that is banked at an angle 25 degree with a speed 30m/s. what is the normal force exerted by the road on the car
A square loop of wire has sides of length 3 cm. A magnetic field points out of the screen; its magnitude is B = 3.0t2y, What is the emf around the square at t = 2.00 s
returns the shot with the ball traveling horizontally at 40 m/s in the opposite direction. Illustrate what is the impulse delivered to the ball by the tennis racquet?
A charge of q = +7.32 ?C is located in an electric field. The x and y components of the electric field are Ex = 5.54E+3 N/C and Ey = 7.90E+3 N/C, What is the magnitude of the force on the charge
A wire with a resistance of 4.5 ? is drawn out through a die so that its new length is 4 times its original length. Find the resistance of the longer wire
one end of a unifrom meter stick of mass 0.25kg is placed against a vertical wall. The other end is held by a lightweight cord making an angle ? =20 degree with the stick, find the frictional force between the stick and the wall
A cart of 0.5 kg hits a fixed cart of 1.5 kg with a velocity of 3 m/s in the north direction. Both carts get stuck together and move, What is the direction of the velocity vector
A man is pushing a heavy box across the floor. The box weighs 95 lbs. The man is pushing forward on it with a force of 56 lbs. What is the resultant horizontal force on the box
A Carnot engine with a hot-reservoir temperature of 360 has the same thermal efficiency. What is the cold-reservoir temperature in C?
An electron moving in the positive x-direction passes through a slit of width ?y = 95.5 nm. What is the minimum uncertainty in the electron's velocity in the y-direction
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