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a boat takes 3.00 hrs to travel 25.0 km down a river then 6.00 hrs to return. the car travels the same speed with respet to the water in both cases. how fast is the river moving (relaitive to teh shore ).
A 3kg object moving along the positive x direction with a speed of 10m/s exploeds into a 2kg and a 1kg fragments. what is the speed of the 2kg fragment?
It is Possible for a large star (one greater than 1.4 Solar masses) to Gravitationally collapse, crushing itself into a tiny neutron star 50 km in diameter, WHat would be the spin rate for the resulting Neutron Star
Select ALL the valid statements, i.e., B, AC, BCD. If an equation is dimensionally A) correct, the equation may be correct. B) incorrect, the equation may be correct. C) correct, the equation may be wrong. D) incorrect, the equation must be wrong...
The systems shown below are in equilibrium with m = 6.10 kg and θ = 35.0°. If the spring scales are calibrated in newtons, what do they read? Ignore the masses of the pulleys and strings and assume the pulleys and the incline are frictionless.
A 9.60 kg object oscillates at the end of a vertical spring that has a spring constant of 1.65*10^4 N/m. By what percentage does the amplitude of the oscillation decrease
q1. a pipe open only at one end has a fundamental frequency of 241 hz. a second pipe initially identical to the first
In a certain reference frame, a particle with momentum of 7 MeV/c and a total energy of 10 MeV. What is the relative speed of the two reference frames
Write down an energy transformation equation
When at rest, two trains have sirens that emit a frequency of 300 Hz. The trains travel toward one another and toward an observer stationed between them. What is the speed of the second train
1. you are hired by an industry that owns a building with a floor area of 6 m by 10 m and a ceiling height of 4 m. the
A block of mass m = 4.43 kg is attached to a spring which is resting on a horizontal frictionless table. What is the maximum speed of the block
An unmarked police car, travelling a constant 94 km/h, is passed by the speeder travelling 153 km/h. precisely 0.70 s after the speeder passes, policeman steps on the accelerator. If the police car's acceleration is 2.30 m/s^2, how much time elapses ..
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