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Two children with masses of 20 and 30 kg are sitting on a balanced seesaw. If the lighter child is sitting 3 m from the center, how far from the center is the heavier child sitting?
Bob walks up to the crate and begins pushing with 200N of force. What is the magnitude of the frictional force now
a flat circle of radius 20 is placed in a uniform electric field of magnitude 6.5times102. what is the electric flux
a monochromatic beam of x-rays with a wavelength of 0.280 nm is scattered by a metal foil. what is the observed scattering angle
A block of mass 2.30 kg is pushed 2.03 m along a frictionless horizontal table by a constant 16.1 N force directed 23.0o below the horizontal. What is the work done by the applied force?
In Fig. 15-53, three 18000 kg ore cars are held at rest on amine railway using a cable that is parallel to the rails, which areinclined at angle θ = 34°. The cable stretches 21 cm justbefore the coupling between the two lower cars breaks, detachin..
A proton moving at 7.6 × 106 m/s through a magnetic ?eld of 8.8 T experiences a magnetic force of magnitude 2.5 × 10?12 N. What is the angle between the proton's velocity and the field
To warn his captain of the approaching army, a scout takes his bow and shoots a burning arrow straight vertically into the sky. What is the velocity of the arrow when it leaves the bow
A particle of mass "m" moves in a straight line with retardation proportional to its displacement. Find the expression for loss of KE for any displacement "x"
The Sun radiates energy at a rate of about 4×1026W. At what rate is the Sun's mass decreasing
two vectors and lie in the xy plane. their magnitudes are 3.54 and 7.08 units respectively and their directions are
A diver can change his rotational inertia by drawing his arms andl egs close to his body in the tuck position. After he leaves the diving board in the straight position (with some unknown angularvelocity), he pulls himself into a ball as closely a..
exploring creation with physics 2nd edition module 14 practice problem 7 a 3.8mc charged particle m5.0kg is shot with
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