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A parachutist leaps from a hovering helicopter, and after 4.0 s of free fall shouts back toward the helicopter. If the shout is emitted at 425 Hz, what frequency is heard on the helicopter? Assume the sound speed in air is 343m/s
A 1.00uF capacitor is connected in parallel with a 2.00uF capacitor, Find the potential on the negative plate of the 1.00uF caacitor and the equivalent capacitance of the two capacitors
Particle physicists use particle track detectors to determine the lifetime of short-lived particles. A muon has a mean lifetime of 2.2 µs and makes a track 9.5 cm long before decaying into an electron and two neutrinos. What was the speed of the m..
A large, hot pizza 86 cm indiameter and 2.0 cm thick, with a temperature of 104°C, floats in outer space. What is the order of magnitude of its rate of energy loss
A raft is 4.4cm wide and 6.2m long. When a horse is loaded onto the raft, it sinks 2.7cm deeper into the water. What is the weight of the horse
A spool whose inner core has a radius of 1.00 cm and whose end caps have a radius of 1.50 cm has a string tightly wound around the inner core. Spool is free to roll without slipping on a horizontal surface.
At a certain time a particle had a speed of 77 m/s in the positive x direction, and 3.3 s later its speed was 36 m/s in the opposite direction. What was the average acceleration of the particle
A LASIK vision correction system uses a laser that emits 10 -long pulses of light, each with 2.5 of energy. The laser is focused to a 0.90 -diameter circle. What is the average power of each laser pulse
A system of 1520 particles, each of which is either an electron or a proton, has a net charge of -6.208 x 10-17. How many electrons are in this system
In the Challenger Deep of the Marianas Trench, the depth of seawater is 10.9 km and the pressure is 1.16 x 10^8Pa (about 1.15 x 10^3 atm). What is the density of seawater at this depth
A proton is released from rest in a uniform electric field of magnitude 409 N/C. Find the acceleration of the proton and direction
The resonance frequency of a series RLC circuit is 790 Hz. The resonance frequency of a series RLC circuit is 790 Hz
is any work done when moving a charge along a field line?a. yes the field does positive work when a positive charge
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