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A supersonic jet passes directly overhead at an altitude of 13,265 m, traveling at 680 m/s, or mach 2. How much time elapses before you hear the sonic boom?
The rms current in a 43 ohm resistor is 0.58 A. What is the peak value of the voltage across this resistor
An airplane has a mass of 3.46 × 104 kg and takes off under the influence of a constant net force of 3.22 × 104 N. What is the net force that acts on the plane's 71.9-kg pilot
A cart of mass 1.8kg rolls without friction on a track. At point A the cart is moving at 6.0m/s. What work was done by friction
A parachutist bails out and freely falls 50 m. Then the parachute opens, and thereafter she decelerates at 1.8 m/s2. At what height does the fall begin
State and explain magnetic dipole moment µ of a coil of number of turns N and area A carrying current i
A long solenoid (cross-sectional area = 1.0 x 10-6 m2, number of turns per unit length = 2380 turns/m) is bent into a circular shape so it looks like a doughnut. Find the emf induced in the toroid
Suppose that the resistance of such a resistance thermometer is 105? when its temperature is 17.2 °C. The wire is then immersed in a liquid, What is the temperature of the liquid
A person on earth notices a rocket approaching from the right at a speed of 0.75c and another rocket approaching from the left at 0.60c. What is the relative speed between the two rockets, as measured by a passenger on one of them? ......c
A 2000 kg statue falls into a circular jacuzzi with a diameter of 5 m, What is the average density of the statue
A ball and bat, approaching one another each with the same speed of 1.1 m/s collide. Find the speed of the ball after the collision. find the factor by which the kinetic energy of the ball increases
A physics professor, equipped with a rocket backpack, steps out of a helicopter at an altitude of 617 m with zero initial velocity. (Neglect air resistance.) What is her average velocity for the entire trip
Two children, with masses 31 kg (on the left) and 45 kg (on the right), sit at opposite ends of a 3.2 m long seesaw with mass 23 kg, find the net torque on the seesaw
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