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You want to build a grandfather clock with a pendulum that has one second between its "tick" (swinging to) and its "tock" (swinging fro). How long should be the cable?
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
an object is placed 12.0 cm in front of the cornea. the cornea is thin ans has approximately parallel sides so that the
The wave is travelling to the right at 50.0 m/s. What is the amplitude if the highest displacement is 38.0 cm and the total distance travelled by the wave is 16.0 m.
a falling flower pot passes a 1.5 m tall window of an apartment building in a time of .16 s. how fast was the pot falling at the top of the window? from what height above the top of the window was the pot dropped?
The Boeing 777 aircraft has a takeoff mass of 255000kg and a takeoff speed of 115m/s, What airflow speed across the top of the wing is necessary for the plane to fly
Water is flowing through a pipe (area 4.2 cm2) that connects to a faucet adjusted to have an opening of 0.48 cm2. what is its speed as it leaves the faucet
An alarm clock is set to sound in 20 h. At t = 0, the clock is placed in a spaceship moving with a speed of 0.72c (relative to Earth). What distance, as determined by an Earth observer, does the spaceship travel before the alarm clock sounds?
A 220g baseball is pitched at 25m/s spinning at 43rad/s. What fraction of its kinetic energy is rotational
In a historical movie, two knights on horseback start from rest 73 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.15 m/s2, while Sir Alfred's has a magnitude of 0.28 m/s2. Relative to Sir Geor..
assume the earth to be sphere of a uniform densitya what is its rotational energy? take the radius of the earth to be
bill steps off a 3.6 m high diving board and drops to the water below. at the same time ted jumps upward with a speed
A charge of -3.81 %u03BCC is fixed in place. From a horizontal distance of 0.0496 m, How far does the particle travel before its speed is zero
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