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Two people, one of mass 70 and the other of mass 50 , sit in a rowboat of mass 87 . With the boat initially at rest, the two people, who have been sitting at opposite ends of the boat, 2.0 apart from each other, now exchange seats. How far will the boat move?
A rugby player passes the all 7.00m across the field, where it is caught at the same height as it left his hand. How long did this pass take
A crate of 45.2-kg tools rests on a horizontal floor. You exert a gradually increasing horizontal push on it and observe that the crate just begins to move when your force exceeds 310N. find the coefficient of static friction between the crate and ..
An ancient bone contains 47.5% as much 14~C~6 as a piece of living matter with an equal carbon content. How old is the bone
You are able to hold out your arm in an outstretched horizontal position because of the action of the deltoid muscle. Find the tension in the deltoid muscle
A large flat plate with uniform charge density ? lies on the xy plane. What is the potential difference between the points (0, 0, a) and (a, a, 2a)
An air parcel occupied by an ideal gas (T1 = 255 K, V1 = 1500 m3, m1 = 1680 kg) collides and mixes with a second air parcel occupied by a second ideal gas (T2 = 280 K, V2 = 1200m3, m2 = 1392 kg). Assuming the specific heat capacities of the gases in ..
A laser beam of unknown wavelength passes through a diffraction grating having 5460lines/cmafter striking it perpendicularly. At what angle will the next pair of bright spots occur
In living tissue, about one out of every 10-12 carbon atoms are the 14C isotope. how long ago did the owner of the bone die
A physical pendulum is made by drilling a hole through a uniform wooden disk of radius R a distance (alpha)*R from the disk's center. What must alpha be to miniumze the disk's period of oscillation
A tight uniform string with a length of 1.80m is tied down at both ends and placed under a tension of 100N/m. What is the mass of the string
Two tuning forks oscillating coherently and in phase at 12000Hz are separated by 0.35m. What is the phase angle difference between the waves
High-speed photos of a 200?g flea jumping vertically show that the jump lasts 1.5ms and involves an average vertical acceleration of 110 g, What's the change in the flea's momentum during its jump
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