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a crate on the floorhas an applied force 11 degrees below horizontal of 815 Newtons.the crate moves with constant velocity. the coefficient of thekinetic friction is 0.15. what is the mass of the crate?
A bullet of mass 22 g is fired horizontally from a gun with a velocity of 1150 m/s into a wooden block of mass 8.0 kg sitting on a horizontal table
An airplane must reach a speed of 172 mi/h to take off. If the runway is 470 m long, what is the minimum value of the acceleration that would allow the airplane to take off productively.
What is the minimum speed need to drive through a banked turn such a car won't slip down the road
Two coherent sound waves have intensities of 0.030 W/m2 and 0.092 W/m2 where you are listening. If the waves interfere constructively, what is the intensity that you hear
in a series r-l-c circuit the phase angle is 40.0 with the source voltage leading the current. the reactance of the
the number of radioactive nuclei present at the state of an experiment is 2.78e15. the number present twenty days later is 5.14e14. what is the half life in days of the nuclei
The train on the right accelerates leftward at 0.82 m/s2.How far does train on the left travel before the front ends of the trains pass.
A diffraction grating has 4436 lines/cm. Light that contains all wavelengths between 447 and 650 nm shines on the grating. Calculate the width of the dark area
you are driving along a highway at 28.8 ms when you hear a siren. you look in the rear-view mirror and see a police car
q1. a spring with spring constant 14 hangs from the ceiling. a ball is attached to the spring and allowed to come to
The elevator is firstly at rest. How far does the elevator move even as accelerating to full speed from rest.
Water has a mass mole of 18.0g/mol, each water molecule(H20) has 10 elelctrons. What is net charge of all electrons? How many electrons are there in one liter (1.00 x10-3m-3) of water?
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